/*
Theme Name: TubeRank Studio
Theme URI: https://tuberank.site/
Author: TubeRank
Description: A fast, accessible theme for the TubeRank YouTube creator toolkit. Flat design system on a slate foundation with an indigo brand accent. No heavy shadows, no blocking webfonts, no layout shift.
Version: 2.2.0
Requires at least: 6.0
Tested up to: 7.1
Requires PHP: 8.0
License: GNU General Public License v2 or later
Text Domain: tuberank-studio
Tags: seo-tools, utility, light, dark, accessibility-ready, responsive
*/

/* ============================================================
   1. DESIGN TOKENS
   Slate foundation + indigo brand. Deliberately not YouTube red:
   avoids brand confusion and reads as a technical utility.
   Contrast: text 17.9:1, muted 7.5:1, brand 6.9:1 on white.
   ============================================================ */

:root {
  --trs-brand:          #4F46E5;
  --trs-brand-hover:    #4338CA;
  --trs-brand-soft:     #EEF2FF;
  --trs-on-brand:       #FFFFFF;

  --trs-positive:       #059669;
  --trs-positive-soft:  #ECFDF5;
  --trs-warning:        #B45309;
  --trs-warning-soft:   #FFFBEB;
  --trs-danger:         #DC2626;
  --trs-danger-soft:    #FEF2F2;

  --trs-bg:             #F8FAFC;
  --trs-surface:        #FFFFFF;
  --trs-surface-2:      #F1F5F9;

  --trs-text:           #0F172A;
  --trs-text-muted:     #475569;
  --trs-text-faint:     #64748B;

  --trs-border:         #E2E8F0;
  --trs-border-strong:  #CBD5E1;

  --trs-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --trs-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --trs-fs-xs:   0.75rem;
  --trs-fs-sm:   0.875rem;
  --trs-fs-base: 1rem;
  --trs-fs-lg:   1.125rem;
  --trs-fs-xl:   1.25rem;
  --trs-fs-2xl:  1.5rem;
  --trs-fs-3xl:  1.875rem;
  --trs-fs-4xl:  2.25rem;

  --trs-1: 4px;  --trs-2: 8px;  --trs-3: 12px; --trs-4: 16px;
  --trs-5: 20px; --trs-6: 24px; --trs-8: 32px; --trs-10: 40px;
  --trs-12: 48px; --trs-16: 64px; --trs-20: 80px;

  --trs-radius-sm: 6px;
  --trs-radius:    10px;
  --trs-radius-lg: 14px;
  --trs-radius-full: 999px;

  --trs-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --trs-shadow:    0 2px 8px rgba(15, 23, 42, .08);

  --trs-t-fast: 150ms;
  --trs-t:      200ms;
  --trs-ease:   cubic-bezier(.2, 0, .2, 1);

  --trs-container: 1140px;
  --trs-measure:   68ch;

  --trs-z-nav: 100;
  --trs-z-modal: 1000;

  /* Toast stays inverted in BOTH themes (it is a transient overlay) */
  --trs-toast-bg:   #1E293B;
  --trs-toast-text: #F8FAFC;
}

/* Dark mode — desaturated tonal variants, not inverted values */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --trs-brand:#818CF8; --trs-brand-hover:#A5B4FC; --trs-brand-soft:#1E1B4B; --trs-on-brand:#0F172A;
    --trs-positive:#34D399; --trs-positive-soft:#052E23;
    --trs-warning:#FBBF24; --trs-warning-soft:#3B2A08;
    --trs-danger:#F87171; --trs-danger-soft:#3B1113;
    --trs-bg:#0F172A; --trs-surface:#1E293B; --trs-surface-2:#273449;
    --trs-text:#F8FAFC; --trs-text-muted:#CBD5E1; --trs-text-faint:#94A3B8;
    --trs-border:#334155; --trs-border-strong:#475569;
    --trs-toast-bg:#E2E8F0; --trs-toast-text:#0F172A;
    --trs-shadow-sm: 0 1px 2px rgba(0,0,0,.4);
    --trs-shadow: 0 2px 8px rgba(0,0,0,.45);
  }
}

:root[data-theme="dark"] {
  --trs-toast-bg:#E2E8F0; --trs-toast-text:#0F172A;
  --trs-brand:#818CF8; --trs-brand-hover:#A5B4FC; --trs-brand-soft:#1E1B4B; --trs-on-brand:#0F172A;
  --trs-positive:#34D399; --trs-positive-soft:#052E23;
  --trs-warning:#FBBF24; --trs-warning-soft:#3B2A08;
  --trs-danger:#F87171; --trs-danger-soft:#3B1113;
  --trs-bg:#0F172A; --trs-surface:#1E293B; --trs-surface-2:#273449;
  --trs-text:#F8FAFC; --trs-text-muted:#CBD5E1; --trs-text-faint:#94A3B8;
  --trs-border:#334155; --trs-border-strong:#475569;
}

/* ============================================================
   2. BASE
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--trs-bg);
  color: var(--trs-text);
  font-family: var(--trs-font);
  font-size: var(--trs-fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
img { background: var(--trs-surface-2); }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--trs-4);
  line-height: 1.2; font-weight: 700;
  letter-spacing: -0.02em; color: var(--trs-text);
}
h1 { font-size: clamp(1.875rem, 1.2rem + 2.6vw, 3rem); }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.25rem); }
h3 { font-size: var(--trs-fs-xl); }
h4 { font-size: var(--trs-fs-lg); }

p { margin: 0 0 var(--trs-4); }

a {
  color: var(--trs-brand);
  text-decoration-thickness: 1px; text-underline-offset: 2px;
  transition: color var(--trs-t-fast) var(--trs-ease);
}
a:hover { color: var(--trs-brand-hover); }

ul, ol { margin: 0 0 var(--trs-4); padding-left: var(--trs-5); }
li { margin-bottom: var(--trs-2); }

code, pre, kbd { font-family: var(--trs-mono); font-size: 0.9em; }
code {
  background: var(--trs-surface-2); padding: 2px 6px;
  border-radius: var(--trs-radius-sm); border: 1px solid var(--trs-border);
}

hr { border: 0; border-top: 1px solid var(--trs-border); margin: var(--trs-8) 0; }

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--trs-brand);
  outline-offset: 2px;
  border-radius: var(--trs-radius-sm);
}

::selection { background: var(--trs-brand); color: var(--trs-on-brand); }

.tr-sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.tr-skip-link {
  position: absolute; left: var(--trs-4); top: -100px;
  z-index: var(--trs-z-modal);
  background: var(--trs-brand); color: var(--trs-on-brand);
  padding: var(--trs-3) var(--trs-5); border-radius: var(--trs-radius);
  font-weight: 600; text-decoration: none;
  transition: top var(--trs-t) var(--trs-ease);
}
.tr-skip-link:focus { top: var(--trs-4); color: var(--trs-on-brand); }

/* ============================================================
   3. LAYOUT
   ============================================================ */

.container, .tr-container {
  width: 100%; max-width: var(--trs-container);
  margin-inline: auto; padding-inline: var(--trs-4);
}
@media (min-width: 768px) {
  .container, .tr-container { padding-inline: var(--trs-6); }
}

.tr-section { padding-block: var(--trs-12); }
@media (min-width: 768px) { .tr-section { padding-block: var(--trs-16); } }

.tr-stack > * + * { margin-top: var(--trs-4); }
.tr-measure { max-width: var(--trs-measure); }

/* ============================================================
   4. HEADER / NAV
   ============================================================ */

.tr-header {
  position: sticky; top: 0; z-index: var(--trs-z-nav);
  background: var(--trs-surface);
  border-bottom: 1px solid var(--trs-border);
}

.tr-header__inner { display: flex; align-items: center; gap: var(--trs-4); min-height: 64px; }

.tr-logo {
  display: inline-flex; align-items: center; gap: var(--trs-2);
  font-size: var(--trs-fs-xl); font-weight: 800; letter-spacing: -0.03em;
  color: var(--trs-text); text-decoration: none; flex-shrink: 0;
}
.tr-logo:hover { color: var(--trs-text); }
.tr-logo__mark { color: var(--trs-brand); display: inline-flex; }
.tr-logo__accent { color: var(--trs-brand); }

.tr-nav { margin-left: auto; }
.tr-nav ul { list-style: none; display: flex; align-items: center; gap: var(--trs-1); margin: 0; padding: 0; }
.tr-nav li { margin: 0; }
.tr-nav a {
  display: flex; align-items: center; min-height: 44px; padding: 0 var(--trs-3);
  border-radius: var(--trs-radius-sm);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm); font-weight: 500; text-decoration: none;
  transition: background var(--trs-t-fast) var(--trs-ease), color var(--trs-t-fast) var(--trs-ease);
}
.tr-nav a:hover { background: var(--trs-surface-2); color: var(--trs-text); }
.tr-nav .current-menu-item > a, .tr-nav .current_page_item > a {
  color: var(--trs-brand); background: var(--trs-brand-soft); font-weight: 600;
}

.tr-nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: transparent; border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-sm); color: var(--trs-text); cursor: pointer;
}

.tr-header__actions { display: flex; align-items: center; gap: var(--trs-2); margin-left: auto; }
@media (min-width: 861px) { .tr-header__actions { margin-left: 0; } }

@media (max-width: 860px) {
  .tr-nav-toggle { display: inline-flex; }
  .tr-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--trs-surface); border-bottom: 1px solid var(--trs-border);
    padding: var(--trs-2) var(--trs-4) var(--trs-4); display: none; margin: 0;
  }
  .tr-nav[data-open="true"] { display: block; }
  .tr-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .tr-nav a { min-height: 48px; }
}

.tr-theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: transparent; border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-sm); color: var(--trs-text-muted); cursor: pointer;
  transition: background var(--trs-t-fast) var(--trs-ease), color var(--trs-t-fast) var(--trs-ease);
}
.tr-theme-toggle:hover { background: var(--trs-surface-2); color: var(--trs-text); }
.tr-theme-toggle .tr-icon-moon { display: none; }
:root[data-theme="dark"] .tr-theme-toggle .tr-icon-sun { display: none; }
:root[data-theme="dark"] .tr-theme-toggle .tr-icon-moon { display: block; }

/* ============================================================
   5. BUTTONS
   Legacy tool classes are included so existing markup restyles.
   ============================================================ */

.tr-btn, .analyze-button, .tool-button, .check-button, .copy-btn, .view-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--trs-2);
  min-height: 44px; padding: 0 var(--trs-5);
  border: 1px solid transparent; border-radius: var(--trs-radius);
  background: var(--trs-brand); color: var(--trs-on-brand);
  font-family: inherit; font-size: var(--trs-fs-base); font-weight: 600;
  line-height: 1; text-decoration: none; cursor: pointer;
  transition: background var(--trs-t-fast) var(--trs-ease), border-color var(--trs-t-fast) var(--trs-ease);
}
.tr-btn:hover, .analyze-button:hover, .tool-button:hover,
.check-button:hover, .copy-btn:hover, .view-btn:hover {
  background: var(--trs-brand-hover); color: var(--trs-on-brand);
}
.tr-btn svg, .analyze-button svg, .check-button svg { width: 18px; height: 18px; flex-shrink: 0; }

.tr-btn--secondary { background: var(--trs-surface); color: var(--trs-text); border-color: var(--trs-border-strong); }
.tr-btn--secondary:hover { background: var(--trs-surface-2); color: var(--trs-text); }
.tr-btn--ghost { background: transparent; color: var(--trs-brand); }
.tr-btn--ghost:hover { background: var(--trs-brand-soft); }

.tr-btn:disabled, .analyze-button:disabled, .check-button:disabled,
.tr-btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; pointer-events: none; }

.tr-btn--lg { min-height: 52px; padding: 0 var(--trs-8); font-size: var(--trs-fs-lg); }
.tr-btn--block { width: 100%; }

/* ============================================================
   6. CARDS
   ============================================================ */

.tr-card {
  background: var(--trs-surface); border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg); padding: var(--trs-6);
}
.tr-card--link {
  display: block; text-decoration: none; color: inherit;
  transition: border-color var(--trs-t-fast) var(--trs-ease);
}
.tr-card--link:hover { border-color: var(--trs-brand); color: inherit; }
.tr-card--link:hover .tr-card__title { color: var(--trs-brand); }

.tr-card__title {
  font-size: var(--trs-fs-lg); font-weight: 700; margin: 0 0 var(--trs-2);
  transition: color var(--trs-t-fast) var(--trs-ease);
}
.tr-card__text { color: var(--trs-text-muted); font-size: var(--trs-fs-sm); margin: 0; }

.tr-grid { display: grid; gap: var(--trs-4); }
.tr-grid--tools { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tr-grid--posts { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--trs-6); }

.tr-badge {
  display: inline-flex; align-items: center; gap: var(--trs-1);
  padding: 2px var(--trs-2); border-radius: var(--trs-radius-full);
  background: var(--trs-brand-soft); color: var(--trs-brand);
  font-size: var(--trs-fs-xs); font-weight: 600;
}
.tr-badge--positive { background: var(--trs-positive-soft); color: var(--trs-positive); }

/* ============================================================
   7. HERO
   ============================================================ */

.tr-hero {
  padding-block: var(--trs-12) var(--trs-10);
  border-bottom: 1px solid var(--trs-border);
  background: var(--trs-surface);
}
@media (min-width: 768px) { .tr-hero { padding-block: var(--trs-16) var(--trs-12); } }
.tr-hero h1 { margin-bottom: var(--trs-4); }
.tr-hero__lead {
  font-size: var(--trs-fs-lg); color: var(--trs-text-muted);
  max-width: var(--trs-measure); margin-bottom: var(--trs-6);
}
.tr-hero__actions { display: flex; flex-wrap: wrap; gap: var(--trs-3); }

/* ============================================================
   8. BLOG
   ============================================================ */

.tr-post-card {
  display: flex; flex-direction: column;
  background: var(--trs-surface); border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg); overflow: hidden;
  transition: border-color var(--trs-t-fast) var(--trs-ease);
}
.tr-post-card:hover { border-color: var(--trs-brand); }
.tr-post-card__media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--trs-surface-2); }
.tr-post-card__media img { width: 100%; height: 100%; object-fit: cover; }
.tr-post-card__body { padding: var(--trs-5); display: flex; flex-direction: column; flex: 1; }
.tr-post-card__title { font-size: var(--trs-fs-lg); margin: 0 0 var(--trs-2); }
.tr-post-card__title a { color: var(--trs-text); text-decoration: none; }
.tr-post-card__title a:hover { color: var(--trs-brand); }
.tr-post-card__excerpt { color: var(--trs-text-muted); font-size: var(--trs-fs-sm); margin: 0 0 var(--trs-4); }
.tr-post-card__meta {
  margin-top: auto; font-size: var(--trs-fs-xs); color: var(--trs-text-faint);
  display: flex; gap: var(--trs-3); align-items: center;
}

.tr-article { background: var(--trs-surface); }
.tr-article__header { padding-block: var(--trs-10) var(--trs-6); border-bottom: 1px solid var(--trs-border); }
.tr-article__meta {
  display: flex; flex-wrap: wrap; gap: var(--trs-3);
  font-size: var(--trs-fs-sm); color: var(--trs-text-faint); margin-bottom: var(--trs-4);
}
.tr-article__body { padding-block: var(--trs-8); }
.tr-article__body > * { max-width: var(--trs-measure); }
.tr-article__body h2 { margin-top: var(--trs-10); }
.tr-article__body h3 { margin-top: var(--trs-8); }
.tr-article__body ul, .tr-article__body ol { padding-left: var(--trs-6); }
.tr-article__body img, .tr-article__body figure, .tr-article__body table { max-width: 100%; }
.tr-article__body table {
  width: 100%; border-collapse: collapse; margin-bottom: var(--trs-6);
  font-size: var(--trs-fs-sm); font-variant-numeric: tabular-nums;
}
.tr-article__body th, .tr-article__body td {
  border: 1px solid var(--trs-border); padding: var(--trs-3); text-align: left;
}
.tr-article__body th { background: var(--trs-surface-2); font-weight: 600; }
.tr-article__body blockquote {
  margin: var(--trs-6) 0; padding: var(--trs-4) var(--trs-5);
  border-left: 3px solid var(--trs-brand); background: var(--trs-surface-2);
  border-radius: 0 var(--trs-radius) var(--trs-radius) 0; color: var(--trs-text-muted);
}
.tr-related-guides { margin-top: var(--trs-10); }

.tr-pagination { display: flex; flex-wrap: wrap; gap: var(--trs-2); justify-content: center; padding-block: var(--trs-10); }
.tr-pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; min-height: 44px; padding: 0 var(--trs-3);
  border: 1px solid var(--trs-border); border-radius: var(--trs-radius-sm);
  background: var(--trs-surface); color: var(--trs-text-muted);
  text-decoration: none; font-weight: 500; font-size: var(--trs-fs-sm);
  transition: background var(--trs-t-fast) var(--trs-ease), border-color var(--trs-t-fast) var(--trs-ease);
}
.tr-pagination .page-numbers:hover { background: var(--trs-surface-2); color: var(--trs-text); }
.tr-pagination .page-numbers.current {
  background: var(--trs-brand); border-color: var(--trs-brand);
  color: var(--trs-on-brand); font-weight: 700;
}

/* ============================================================
   9. FOOTER
   ============================================================ */

.tr-footer {
  margin-top: var(--trs-16); background: var(--trs-surface);
  border-top: 1px solid var(--trs-border); padding-block: var(--trs-12) var(--trs-6);
}
.tr-footer__grid {
  display: grid; gap: var(--trs-8);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: var(--trs-10);
}
.tr-footer__heading {
  font-size: var(--trs-fs-sm); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--trs-text-faint); margin-bottom: var(--trs-3);
}
.tr-footer ul { list-style: none; padding: 0; margin: 0; }
.tr-footer li { margin-bottom: var(--trs-1); }
.tr-footer li a {
  display: inline-flex; align-items: center; min-height: 32px;
  color: var(--trs-text-muted); font-size: var(--trs-fs-sm); text-decoration: none;
}
.tr-footer li a:hover { color: var(--trs-brand); text-decoration: underline; }
.tr-footer__bottom {
  border-top: 1px solid var(--trs-border); padding-top: var(--trs-6);
  display: flex; flex-wrap: wrap; gap: var(--trs-4);
  align-items: center; justify-content: space-between;
  font-size: var(--trs-fs-sm); color: var(--trs-text-faint);
}
.tr-footer__tagline { max-width: 52ch; margin: var(--trs-2) 0 0; font-size: var(--trs-fs-sm); color: var(--trs-text-muted); }

/* ============================================================
   10. UTILITY / STATE
   ============================================================ */

.tr-note {
  display: flex; gap: var(--trs-3); padding: var(--trs-4);
  border: 1px solid var(--trs-border); border-left: 3px solid var(--trs-brand);
  border-radius: 0 var(--trs-radius) var(--trs-radius) 0;
  background: var(--trs-surface-2); font-size: var(--trs-fs-sm); color: var(--trs-text-muted);
}
.tr-note--warning { border-left-color: var(--trs-warning); background: var(--trs-warning-soft); }

.tr-empty { text-align: center; padding: var(--trs-16) var(--trs-4); color: var(--trs-text-muted); }
.tr-empty h2 { color: var(--trs-text); }

.tr-text-muted { color: var(--trs-text-muted); }
.tr-tabular { font-variant-numeric: tabular-nums; }

/* ============================================================
   11. MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   12. PRINT
   ============================================================ */

@media print {
  .tr-header, .tr-footer, .tr-nav, .tr-theme-toggle, .tr-skip-link { display: none !important; }
  body { background: #fff; color: #000; }
  a { text-decoration: underline; }
}


/* ============================================================
   13. PLUGIN COMPATIBILITY LAYER
   tuberank-seo-booster ships its own design system using the same
   --tr-* names this theme used to use, and enqueues it at priority 99
   (after the theme). The theme now namespaces its own tokens as --trs-*,
   and the plugin's names are re-pointed here at the theme palette so any
   inline style the plugin prints is rebranded automatically instead of
   rendering unstyled. Its red accent becomes the TubeRank indigo.
   ============================================================ */

:root {
  --tr-font:            var(--trs-font);
  --tr-font-display:    var(--trs-font);

  --tr-bg:              var(--trs-bg);
  --tr-bg-elevated:     var(--trs-surface);
  --tr-bg-soft:         var(--trs-surface-2);
  --tr-bg-muted:        var(--trs-surface-2);

  --tr-text-primary:    var(--trs-text);
  --tr-text-secondary:  var(--trs-text-muted);
  --tr-text-muted:      var(--trs-text-faint);

  --tr-border:          var(--trs-border);
  --tr-card-bg:         var(--trs-surface);
  --tr-card-border:     var(--trs-border);
  --tr-card-shadow:     var(--trs-shadow-sm);

  /* brand: the plugin's red becomes the theme indigo */
  --tr-red:             var(--trs-brand);
  --tr-red-dark:        var(--trs-brand-hover);
  --tr-red-soft:        var(--trs-brand-soft);
  --tr-ring:            rgba(79, 70, 229, .26);

  --tr-success:         var(--trs-positive);
  --tr-warning:         var(--trs-warning);
  --tr-danger:          var(--trs-danger);

  --tr-shadow-xs:       var(--trs-shadow-sm);
  --tr-shadow-sm:       var(--trs-shadow-sm);
  --tr-shadow-md:       var(--trs-shadow);

  --tr-radius-sm:       var(--trs-radius-sm);
  --tr-radius:          var(--trs-radius);
  --tr-radius-lg:       var(--trs-radius-lg);

  --tr-container:       var(--trs-container);
  --tr-transition:      var(--trs-t) var(--trs-ease);

  --tr-z-header:        var(--trs-z-nav);
  --tr-z-overlay:       var(--trs-z-modal);
  --tr-z-toggle:        var(--trs-z-nav);
}

/* The plugin's phase-4 tool pages define their own --tr4-* palette inline.
   Re-point the ones that carry brand colour. */
.tr4-page, .tr4-related {
  --tr4-red:  var(--trs-brand);
  --tr4-ink:  var(--trs-text);
  --tr4-muted: var(--trs-text-muted);
  --tr4-line: var(--trs-border);
  --tr4-soft: var(--trs-surface-2);
  --tr4-good: var(--trs-positive);
  --tr4-warn: var(--trs-warning);
}


/* ============================================================
   14. LEGACY TOOL-CSS VARIABLE CONTRACT
   css/youtube-tools.css was written against a variable set the previous
   style.css defined (--primary-color, --radius-lg, --shadow-md, ...).
   Replacing style.css orphaned those references, so they are re-declared
   here and pointed at the theme palette. This is what carries the rebrand
   into all 40 tool components without touching their markup or JS.
   ============================================================ */

:root {
  /* brand */
  --primary-color:   var(--trs-brand);
  --primary-dark:    var(--trs-brand-hover);
  --primary-soft:    var(--trs-brand-soft);
  --secondary-color: var(--trs-brand);
  --secondary-dark:  var(--trs-brand-hover);
  --accent-color:    var(--trs-brand);

  /* semantic */
  --success-color:   var(--trs-positive);
  --warning-color:   var(--trs-warning);
  --error-color:     var(--trs-danger);
  --danger-color:    var(--trs-danger);

  /* text */
  --text-primary:    var(--trs-text);
  --text-secondary:  var(--trs-text-muted);
  --text-light:      var(--trs-text-faint);
  --text-muted:      var(--trs-text-faint);

  /* surfaces */
  --bg-primary:      var(--trs-surface);
  --bg-secondary:    var(--trs-surface-2);
  --bg-tertiary:     var(--trs-bg);

  /* borders */
  --border-color:    var(--trs-border);
  --border-light:    var(--trs-border);
  --border-strong:   var(--trs-border-strong);

  /* radii — flattened to the theme scale */
  --radius-sm:       var(--trs-radius-sm);
  --radius-md:       var(--trs-radius);
  --radius-lg:       var(--trs-radius);
  --radius-xl:       var(--trs-radius-lg);

  /* shadows — deliberately subtle for the flat system */
  --shadow-sm:       var(--trs-shadow-sm);
  --shadow-md:       var(--trs-shadow-sm);
  --shadow-lg:       var(--trs-shadow);

  --transition:      var(--trs-t) var(--trs-ease);
}

/* ===========================================================================
 * 15. Tool limitation disclosures
 *
 * Ported out of tuberank-seo-booster (tr_phase3_global_accessibility_styles).
 * Styles the per-tool scope notes emitted by tuberank_studio_the_tool_disclosure().
 * Uses theme tokens rather than the plugin's hardcoded greys so it follows dark mode.
 * ======================================================================== */

.tr-tool-disclosure {
  max-width: 920px;
  margin: 24px auto;
  padding: 16px 18px;
  border: 1px solid var(--trs-border);
  border-left: 4px solid var(--trs-brand);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text-muted);
  line-height: 1.65;
}

@media (max-width: 640px) {
  .tr-tool-disclosure { margin: 18px 16px; }
}

/* Legacy premium prompts from the pre-rebrand theme: the site is fully free. */
.pro-badge,
.tr-pro-badge,
.upgrade-prompt,
.tr-upgrade-prompt,
[class*="pro-prompt"] {
  display: none !important;
}

/* Blog archive kicker (carried over from the plugin's archive header). */
.tr-blog-archive-kicker {
  margin: 0 0 var(--trs-2);
  color: var(--trs-brand);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ===========================================================================
 * 16. Homepage components + widget-injected related tools
 *
 * WHY THIS EXISTS
 * ---------------
 * The homepage content (page 1101) and the footer widget's related-tools
 * injector both use a `tr-*` component vocabulary that lived in Customizer →
 * Additional CSS. That CSS is stored per theme (post_type `custom_css`, one row
 * per stylesheet slug), so activating tuberank-studio silently orphaned all
 * 120KB of it against the previous theme's slug and the homepage lost every
 * style it depended on.
 *
 * Rather than restore that stylesheet wholesale — it is red-branded and full of
 * !important overrides written against the OLD theme's markup — the components
 * are rebuilt here on this theme's own --trs-* tokens, so they follow the
 * indigo palette and get dark mode for free.
 *
 * Homepage rules are scoped to `.home` on purpose: index.php already uses
 * .tr-hero / .tr-hero__actions for the blog archive hero, and unscoped rules
 * would break it.
 * ======================================================================== */

/* --- Hero -------------------------------------------------------------- */
.home .tr-hero {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 58%, #312E81 140%);
  padding: clamp(56px, 8vw, 88px) var(--trs-5) clamp(48px, 6vw, 72px);
  text-align: center;
}
.home .tr-hero__inner { max-width: 820px; margin: 0 auto; }
.home .tr-hero__badge {
  display: inline-block;
  margin-bottom: var(--trs-5);
  padding: 6px 16px;
  border: 1px solid rgba(165, 180, 252, .35);
  border-radius: var(--trs-radius-full);
  background: rgba(99, 102, 241, .16);
  color: #C7D2FE;
  font-size: var(--trs-fs-xs);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.home .tr-hero h1,
.home .tr-hero__title {
  margin: 0 0 var(--trs-5);
  color: #F8FAFC;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
}
.home .tr-hero__accent { color: #A5B4FC; }
.home .tr-hero__subtitle {
  max-width: 620px;
  margin: 0 auto var(--trs-8);
  color: #CBD5E1;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.7;
}
.home .tr-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--trs-4);
  justify-content: center;
  margin-bottom: var(--trs-10);
}
.home .tr-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(24px, 5vw, 48px);
  justify-content: center;
  padding-top: var(--trs-8);
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.home .tr-hero__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.home .tr-hero__stat-num {
  color: #F8FAFC;
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}
.home .tr-hero__stat-label {
  color: #94A3B8;
  font-size: var(--trs-fs-xs);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* --- Section scaffolding ----------------------------------------------- */
.home .tr-pillars,
.home .tr-tools,
.home .tr-trust,
.home .tr-cta {
  padding: clamp(48px, 7vw, 72px) var(--trs-5);
  text-align: center;
}
.home .tr-pillars, .home .tr-trust { background: var(--trs-surface-2); }
.home .tr-tools { background: var(--trs-bg); }
.home .tr-pillars__inner,
.home .tr-tools__inner,
.home .tr-trust__inner { max-width: var(--trs-container); margin: 0 auto; }

.home .tr-section-label {
  display: inline-block;
  margin-bottom: var(--trs-3);
  color: var(--trs-brand);
  font-size: var(--trs-fs-xs);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.home .tr-section-title {
  margin: 0 0 var(--trs-4);
  color: var(--trs-text);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.025em;
}
.home .tr-section-desc {
  max-width: 620px;
  margin: 0 auto var(--trs-10);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-lg);
  line-height: 1.7;
}

/* --- Pillars ------------------------------------------------------------ */
.home .tr-pillars__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--trs-6);
  text-align: left;
}
.home .tr-pillar {
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
  transition: box-shadow var(--trs-t) var(--trs-ease), transform var(--trs-t) var(--trs-ease);
}
.home .tr-pillar:hover { box-shadow: var(--trs-shadow); transform: translateY(-2px); }
.home .tr-pillar__icon { margin-bottom: var(--trs-3); font-size: 1.9rem; line-height: 1; }
.home .tr-pillar__title {
  margin: 0 0 var(--trs-2);
  color: var(--trs-text);
  font-size: var(--trs-fs-lg);
  font-weight: 700;
}
.home .tr-pillar__desc {
  margin: 0 0 var(--trs-4);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
  line-height: 1.6;
}
.home .tr-pillar__tools {
  margin: 0;
  padding: var(--trs-3) 0 0;
  border-top: 1px solid var(--trs-border);
  list-style: none;
}
.home .tr-pillar__tools li { margin-bottom: 4px; }
.home .tr-pillar__tools a {
  color: var(--trs-brand);
  font-size: var(--trs-fs-sm);
  font-weight: 500;
  text-decoration: none;
}
.home .tr-pillar__tools a:hover { text-decoration: underline; }

/* --- Featured tool cards ------------------------------------------------ */
.home .tr-tools__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--trs-4);
  margin-bottom: var(--trs-8);
  text-align: left;
}
.home .tr-tool-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--trs-4);
  padding: var(--trs-5);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
  text-decoration: none;
  transition: box-shadow var(--trs-t) var(--trs-ease),
              transform var(--trs-t) var(--trs-ease),
              border-color var(--trs-t) var(--trs-ease);
}
.home .tr-tool-card:hover {
  border-color: var(--trs-brand);
  box-shadow: var(--trs-shadow);
  transform: translateY(-2px);
}
.home .tr-tool-card__icon { flex-shrink: 0; margin-top: 2px; font-size: 1.5rem; line-height: 1; }
.home .tr-tool-card__body { flex: 1; min-width: 0; }
.home .tr-tool-card__title {
  margin: 0 0 4px;
  color: var(--trs-text);
  font-size: var(--trs-fs-base);
  font-weight: 700;
  line-height: 1.3;
}
.home .tr-tool-card__desc {
  margin: 0;
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
  line-height: 1.5;
}
.home .tr-tool-card__tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 2px 8px;
  border-radius: var(--trs-radius-full);
  background: var(--trs-positive-soft);
  color: var(--trs-positive);
  font-size: var(--trs-fs-xs);
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.home .tr-tools__cta { text-align: center; }

/* --- Trust -------------------------------------------------------------- */
.home .tr-trust__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--trs-6);
  margin-bottom: var(--trs-10);
  text-align: left;
}
.home .tr-trust__card {
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.home .tr-trust__icon { margin-bottom: var(--trs-3); font-size: 1.9rem; line-height: 1; }
.home .tr-trust__card h3 {
  margin: 0 0 var(--trs-2);
  color: var(--trs-text);
  font-size: var(--trs-fs-lg);
  font-weight: 700;
}
.home .tr-trust__card p {
  margin: 0;
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
  line-height: 1.6;
}
.home .tr-trust__principles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--trs-3) var(--trs-8);
  justify-content: center;
}
.home .tr-principle {
  display: flex;
  align-items: center;
  gap: var(--trs-2);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
}
.home .tr-principle__check { color: var(--trs-positive); font-weight: 700; }

/* --- Closing CTA -------------------------------------------------------- */
.home .tr-cta { background: #0F172A; }
.home .tr-cta__inner { max-width: 680px; margin: 0 auto; }
.home .tr-cta__title {
  margin: 0 0 var(--trs-4);
  color: #F8FAFC;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -.025em;
}
.home .tr-cta__desc {
  margin: 0 0 var(--trs-8);
  color: #CBD5E1;
  font-size: var(--trs-fs-lg);
  line-height: 1.7;
}
.home .tr-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--trs-4);
  justify-content: center;
}

/* --- Buttons ------------------------------------------------------------ */
.home .tr-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--trs-2);
  min-height: 44px;                 /* touch target */
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--trs-radius);
  font-size: var(--trs-fs-base);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--trs-t) var(--trs-ease),
              border-color var(--trs-t) var(--trs-ease),
              color var(--trs-t) var(--trs-ease);
}
.home .tr-btn--primary {
  border-color: var(--trs-brand);
  background: var(--trs-brand);
  color: var(--trs-on-brand);
}
.home .tr-btn--primary:hover {
  border-color: var(--trs-brand-hover);
  background: var(--trs-brand-hover);
}
.home .tr-btn--secondary {
  border-color: rgba(255, 255, 255, .3);
  background: transparent;
  color: #F8FAFC;
}
.home .tr-btn--secondary:hover { background: rgba(255, 255, 255, .1); }
.home .tr-btn--outline {
  border-color: var(--trs-border-strong);
  background: transparent;
  color: var(--trs-text);
}
.home .tr-btn--outline:hover { background: var(--trs-surface-2); }
.home .tr-btn--large { padding: 14px 32px; font-size: var(--trs-fs-lg); }

/* ---------------------------------------------------------------------------
 * Related tools — injected client-side by the footer widget on tool pages.
 * NOT scoped to .home: these appear across the tool pages.
 * ------------------------------------------------------------------------ */
.tr-related-tools {
  max-width: var(--trs-container);
  margin: var(--trs-10) auto;
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface-2);
}
.tr-related-tools h3 {
  margin: 0 0 var(--trs-4);
  color: var(--trs-text);
  font-size: var(--trs-fs-lg);
  font-weight: 700;
}
.tr-related-tools__grid { display: flex; flex-wrap: wrap; gap: var(--trs-2); }
.tr-related-tools__link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 14px;
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-full);
  background: var(--trs-surface);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
  font-weight: 500;
  text-decoration: none;
  transition: border-color var(--trs-t) var(--trs-ease), color var(--trs-t) var(--trs-ease);
}
.tr-related-tools__link:hover {
  border-color: var(--trs-brand);
  color: var(--trs-brand);
  background: var(--trs-brand-soft);
}

@media (max-width: 767px) {
  .home .tr-hero__actions,
  .home .tr-cta__actions { flex-direction: column; align-items: center; }
  .home .tr-hero__actions .tr-btn,
  .home .tr-cta__actions .tr-btn { width: 100%; justify-content: center; }
}

/* ---------------------------------------------------------------------------
 * Homepage layout override.
 *
 * page.php wraps content in `.container .tr-article__body`, which applies
 * `> * { max-width: var(--trs-measure) }` — a 68ch reading measure that is right
 * for prose (posts, policy pages) but squeezes the landing-page bands to ~646px.
 * On the front page the sections are full-bleed bands with their own inner
 * max-width, so the measure is lifted and they break out of the container.
 *
 * body already sets overflow-x: hidden, so the 100vw break-out cannot introduce
 * a horizontal scrollbar.
 * ------------------------------------------------------------------------ */
.home .tr-article__body { padding-block: 0; }
.home .tr-article__body > * { max-width: none; }

.home .tr-hero,
.home .tr-pillars,
.home .tr-tools,
.home .tr-trust,
.home .tr-cta {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
}

/* Inner wrappers keep the readable column and stay centred. */
.home .tr-hero__inner,
.home .tr-pillars__inner,
.home .tr-tools__inner,
.home .tr-trust__inner,
.home .tr-cta__inner { margin-inline: auto; }

/* ===========================================================================
 * 17. Tool-page components
 *
 * Same root cause as §16: these classes were defined only in the Customizer
 * "Additional CSS" that stayed bound to the previous theme's slug. The tool
 * templates' own markup (hero, info cards, how-to steps, related tools) lost
 * its styling at theme-switch time, and the flagship methodology block ported
 * out of tuberank-seo-booster carried its HTML but not its CSS.
 *
 * Rebuilt on --trs-* tokens so they follow the indigo palette and dark mode.
 * ======================================================================== */

/* --- Tool hero ---------------------------------------------------------- */
.hero-section { padding-block: var(--trs-10) var(--trs-8); }
.hero-content { max-width: 760px; }
.hero-content h1 { margin: 0 0 var(--trs-4); }
.hero-content > p {
  margin: 0 0 var(--trs-6);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-lg);
  line-height: 1.7;
}
.highlight { color: var(--trs-brand); }

/* --- Tool form card ----------------------------------------------------- */
.tool-container {
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.tool-form { display: block; }
.form-group { margin-bottom: var(--trs-5); }
.form-group:last-of-type { margin-bottom: var(--trs-4); }
.form-label,
.tool-form label {
  display: block;
  margin-bottom: var(--trs-2);
  color: var(--trs-text);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
}
.form-help {
  display: block;
  margin-top: 6px;
  color: var(--trs-text-faint);
  font-size: var(--trs-fs-sm);
  line-height: 1.5;
}

/* --- Loading / error states -------------------------------------------- */
.tool-loading,
.results-section > .loading { text-align: center; padding: var(--trs-6) 0; }
.loading-spinner {
  width: 36px;
  height: 36px;
  margin: 0 auto var(--trs-3);
  border: 3px solid var(--trs-border);
  border-top-color: var(--trs-brand);
  border-radius: 50%;
  animation: trs-spin .8s linear infinite;
}
@keyframes trs-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .loading-spinner { animation-duration: 2.4s; }
}
.tool-error,
.tr-tool-message--error {
  display: flex;
  align-items: flex-start;
  gap: var(--trs-3);
  margin-top: var(--trs-4);
  padding: var(--trs-4);
  border: 1px solid var(--trs-danger);
  border-left: 4px solid var(--trs-danger);
  border-radius: var(--trs-radius);
  background: var(--trs-danger-soft);
}
.error-icon { flex-shrink: 0; line-height: 1.2; }
.error-message { margin: 0; color: var(--trs-text); font-size: var(--trs-fs-sm); line-height: 1.6; }

/* --- Results ------------------------------------------------------------ */
.results-section { padding-block: var(--trs-8); }
.result-box,
.copy-box {
  padding: var(--trs-4);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius);
  background: var(--trs-surface-2);
}

/* --- Info / feature cards ---------------------------------------------- */
.info-section { padding-block: var(--trs-10); background: var(--trs-surface-2); }
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--trs-6);
}
.info-card {
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.info-icon { margin-bottom: var(--trs-3); font-size: 1.8rem; line-height: 1; }
.info-card h3 { margin: 0 0 var(--trs-2); color: var(--trs-text); font-size: var(--trs-fs-lg); }
.info-card p { margin: 0; color: var(--trs-text-muted); font-size: var(--trs-fs-sm); line-height: 1.6; }

.info-box {
  margin: var(--trs-6) 0;
  padding: var(--trs-5);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
}
.info-header { display: flex; align-items: center; gap: var(--trs-2); margin-bottom: var(--trs-3); }
.info-content { color: var(--trs-text-muted); line-height: 1.7; }

/* --- How-to / guide steps ---------------------------------------------- */
.guide-section { padding-block: var(--trs-10); }
.guide-section > .container > h2 { margin: 0 0 var(--trs-8); }
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--trs-6);
}
.guide-card {
  position: relative;
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.guide-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: var(--trs-3);
  border-radius: 50%;
  background: var(--trs-brand);
  color: var(--trs-on-brand);
  font-size: var(--trs-fs-base);
  font-weight: 700;
  line-height: 1;
}
.guide-icon { margin-bottom: var(--trs-3); font-size: 1.8rem; line-height: 1; }
.guide-card h3 { margin: 0 0 var(--trs-2); color: var(--trs-text); font-size: var(--trs-fs-lg); }
.guide-card p { margin: 0; color: var(--trs-text-muted); font-size: var(--trs-fs-sm); line-height: 1.6; }

/* --- Related tools on tool pages --------------------------------------- */
.related-tools-section { padding-block: var(--trs-10); background: var(--trs-surface-2); }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--trs-4);
}
.tool-card {
  display: block;
  padding: var(--trs-5);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
  text-decoration: none;
  transition: border-color var(--trs-t) var(--trs-ease), box-shadow var(--trs-t) var(--trs-ease),
              transform var(--trs-t) var(--trs-ease);
}
.tool-card:hover { border-color: var(--trs-brand); box-shadow: var(--trs-shadow); transform: translateY(-2px); }
.tool-card h3 { margin: 0 0 var(--trs-2); color: var(--trs-text); font-size: var(--trs-fs-base); }
.tool-card p { margin: 0; color: var(--trs-text-muted); font-size: var(--trs-fs-sm); line-height: 1.5; }
.tool-link { color: var(--trs-brand); font-weight: 600; text-decoration: none; }
.tool-link:hover { text-decoration: underline; }

/* ---------------------------------------------------------------------------
 * Flagship methodology block (ported from tuberank-seo-booster).
 *
 * The plugin styled this as a translucent DARK card (rgba(15,23,42,.55)) to suit
 * the old theme. It is a <section> placed directly in <main>, outside .container,
 * so without a max-width it ran flush to the viewport edge. Re-tokenised here.
 * ------------------------------------------------------------------------ */
.tr-methodology {
  max-width: 900px;
  margin: var(--trs-10) auto;
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
  line-height: 1.7;
}
@media (max-width: 1139px) {
  .tr-methodology { margin-inline: var(--trs-5); }
}
.tr-methodology h2 { margin-top: 0; }
.tr-methodology h3 { margin-top: var(--trs-6); }
.tr-methodology li { margin-bottom: var(--trs-2); }
.tr-methodology__review {
  margin-top: var(--trs-6);
  padding-top: var(--trs-4);
  border-top: 1px solid var(--trs-border);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
}

/* ===========================================================================
 * 18. `tr-tool-*` component family
 *
 * A newer tool-page markup vocabulary used by title-capitalizer-tool,
 * title-and-description-checker and keyword-finder. Same orphaned-CSS cause as
 * §16/§17. Without these rules the affected pages rendered flush to the
 * viewport edge with raw textareas and unstyled buttons.
 * ======================================================================== */

.tr-tool-wrap {
  width: min(var(--trs-container), calc(100% - 2 * var(--trs-5)));
  margin-inline: auto;
  padding-block: var(--trs-8) var(--trs-10);
}

/* --- Hero --------------------------------------------------------------- */
.tr-tool-hero { max-width: 760px; margin-bottom: var(--trs-8); }
.tr-tool-kicker {
  margin-bottom: var(--trs-2);
  color: var(--trs-brand);
  font-size: var(--trs-fs-xs);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.tr-tool-title { margin: 0 0 var(--trs-4); }
.tr-tool-title .accent,
.accent { color: var(--trs-brand); }
.tr-tool-subtitle {
  margin: 0;
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-lg);
  line-height: 1.7;
}

/* --- Card + form -------------------------------------------------------- */
.tr-tool-card {
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.tr-tool-field { margin-bottom: var(--trs-5); }
.tr-tool-label {
  display: block;
  margin-bottom: var(--trs-2);
  color: var(--trs-text);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
}
.tr-tool-textarea,
.tr-tool-input {
  display: block;
  width: 100%;
  padding: var(--trs-3) var(--trs-4);
  border: 1px solid var(--trs-border-strong);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text);
  font: inherit;
  font-size: var(--trs-fs-base);
  line-height: 1.6;
  resize: vertical;
}
.tr-tool-textarea:focus,
.tr-tool-input:focus {
  outline: none;
  border-color: var(--trs-brand);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .18);
}
.tr-tool-textarea::placeholder { color: var(--trs-text-faint); }

/* --- Buttons ------------------------------------------------------------ */
.tr-cap-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--trs-2);
  margin-top: var(--trs-4);
}
.tr-cap-btn,
.tr-tool-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--trs-2);
  min-height: 44px;                 /* touch target */
  padding: 10px 18px;
  border: 1px solid var(--trs-border-strong);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--trs-t) var(--trs-ease),
              background-color var(--trs-t) var(--trs-ease),
              color var(--trs-t) var(--trs-ease);
}
.tr-cap-btn:hover,
.tr-tool-button:hover {
  border-color: var(--trs-brand);
  background: var(--trs-brand-soft);
  color: var(--trs-brand);
}
.tr-tool-button--primary,
.tr-tool-button.is-primary {
  border-color: var(--trs-brand);
  background: var(--trs-brand);
  color: var(--trs-on-brand);
}
.tr-tool-button--primary:hover,
.tr-tool-button.is-primary:hover {
  border-color: var(--trs-brand-hover);
  background: var(--trs-brand-hover);
  color: var(--trs-on-brand);
}

/* --- Result + messages -------------------------------------------------- */
.tr-tool-result {
  margin-top: var(--trs-6);
  padding-top: var(--trs-6);
  border-top: 1px solid var(--trs-border);
}
.tr-cap-result-title { margin: 0; color: var(--trs-text); font-size: var(--trs-fs-lg); }
.tr-cap-actions { display: flex; flex-wrap: wrap; gap: var(--trs-2); margin-top: var(--trs-4); }

.tr-tool-message {
  display: flex;
  align-items: flex-start;
  gap: var(--trs-3);
  margin-top: var(--trs-4);
  padding: var(--trs-4);
  border: 1px solid var(--trs-border);
  border-left: 4px solid var(--trs-brand);
  border-radius: var(--trs-radius);
  background: var(--trs-surface-2);
  font-size: var(--trs-fs-sm);
  line-height: 1.6;
}
.tr-tool-message--error {
  border-color: var(--trs-danger);
  border-left-color: var(--trs-danger);
  background: var(--trs-danger-soft);
}
.tr-tool-message--success {
  border-color: var(--trs-positive);
  border-left-color: var(--trs-positive);
  background: var(--trs-positive-soft);
}

/* ===========================================================================
 * 19. Remaining orphaned classes
 *
 * The tail of the Customizer-CSS loss (see §16): icon colour modifiers, the
 * homepage "Latest Articles" block, the `yt-*` vocabulary on
 * video-format-converter, blog pagination, and the result panels that tool
 * pages reveal once a tool runs (most are display:none until then, which is
 * why they were easy to miss).
 * ======================================================================== */

/* --- Icon colour modifiers ---------------------------------------------
 * Used as `tool-icon analytics`, `guide-icon monetize` — the base classes are
 * styled in §17; these only ever supplied a tint.
 * ------------------------------------------------------------------------ */
.tool-icon.analytics,  .guide-icon.analytics  { color: #2563EB; }
.tool-icon.keyword,    .guide-icon.keyword    { color: #7C3AED; }
.tool-icon.monetize,   .guide-icon.monetize   { color: #059669; }
.tool-icon.thumbnail,  .guide-icon.thumbnail  { color: #DB2777; }
.tool-icon.analyze,    .guide-icon.analyze    { color: #0891B2; }
.tool-icon.optimize,   .guide-icon.optimize   { color: #EA580C; }
.tool-icon.setup,      .guide-icon.setup      { color: var(--trs-brand); }
.tool-icon.subtitle,   .guide-icon.subtitle   { color: #4338CA; }
.tool-icon.id-finder,  .guide-icon.id-finder  { color: #0D9488; }
.tool-icon.fake-checker, .guide-icon.fake-checker { color: var(--trs-danger); }

/* --- Homepage: Latest Articles ------------------------------------------ */
.home .tr-latest-articles {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  padding: clamp(48px, 7vw, 72px) var(--trs-5);
  background: var(--trs-surface-2);
  text-align: center;
}
.home .tr-latest-articles__inner { max-width: var(--trs-container); margin-inline: auto; }
.home .tr-latest-articles__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--trs-6);
  text-align: left;
}
.home .tr-latest-article {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
  transition: box-shadow var(--trs-t) var(--trs-ease), transform var(--trs-t) var(--trs-ease);
}
.home .tr-latest-article:hover { box-shadow: var(--trs-shadow); transform: translateY(-2px); }
.home .tr-latest-article__media { display: block; aspect-ratio: 16 / 9; overflow: hidden; }
.home .tr-latest-article__image { width: 100%; height: 100%; object-fit: cover; display: block; }
.home .tr-latest-article__content { display: flex; flex-direction: column; gap: var(--trs-2); padding: var(--trs-5); }
.home .tr-latest-article__title { margin: 0; font-size: var(--trs-fs-lg); line-height: 1.35; }
.home .tr-latest-article__title a,
.home .tr-latest-article__link { color: var(--trs-text); text-decoration: none; }
.home .tr-latest-article__title a:hover,
.home .tr-latest-article__link:hover { color: var(--trs-brand); }
.home .tr-latest-article__excerpt { margin: 0; color: var(--trs-text-muted); font-size: var(--trs-fs-sm); line-height: 1.6; }
.home .tr-latest-article__meta { color: var(--trs-text-faint); font-size: var(--trs-fs-xs); }
.home .tr-latest-articles__actions { margin-top: var(--trs-8); }

/* --- video-format-converter: `yt-*` vocabulary -------------------------- */
.yt-container { width: min(var(--trs-container), calc(100% - 2 * var(--trs-5))); margin-inline: auto; }
.yt-hero { padding-block: var(--trs-10) var(--trs-8); }
.yt-hero__content { max-width: 720px; margin-bottom: var(--trs-8); }
.yt-badge {
  display: inline-block;
  margin-bottom: var(--trs-3);
  padding: 4px 12px;
  border-radius: var(--trs-radius-full);
  background: var(--trs-brand-soft);
  color: var(--trs-brand);
  font-size: var(--trs-fs-xs);
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.yt-hero__content h1 { margin: 0 0 var(--trs-3); }
.yt-hero__content p { margin: 0; color: var(--trs-text-muted); font-size: var(--trs-fs-lg); line-height: 1.7; }
.yt-card {
  max-width: 720px;
  padding: var(--trs-6);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-surface);
  box-shadow: var(--trs-shadow-sm);
}
.yt-field { margin-bottom: var(--trs-5); }
.yt-field label {
  display: block;
  margin-bottom: var(--trs-2);
  color: var(--trs-text);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
}
.yt-field input,
.yt-field select {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--trs-3) var(--trs-4);
  border: 1px solid var(--trs-border-strong);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text);
  font: inherit;
}
.yt-field input:focus,
.yt-field select:focus {
  outline: none;
  border-color: var(--trs-brand);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .18);
}
.yt-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 46px;
  padding: 12px 24px;
  border: 1px solid var(--trs-brand);
  border-radius: var(--trs-radius);
  background: var(--trs-brand);
  color: var(--trs-on-brand);
  font-size: var(--trs-fs-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--trs-t) var(--trs-ease);
}
.yt-button:hover { background: var(--trs-brand-hover); border-color: var(--trs-brand-hover); }
.yt-status {
  margin-top: var(--trs-4);
  padding: var(--trs-3) var(--trs-4);
  border-radius: var(--trs-radius);
  background: var(--trs-surface-2);
  color: var(--trs-text-muted);
  font-size: var(--trs-fs-sm);
}
.yt-result { max-width: 720px; margin-top: var(--trs-6); }
.yt-result__box {
  padding: var(--trs-6);
  border: 1px solid var(--trs-positive);
  border-radius: var(--trs-radius-lg);
  background: var(--trs-positive-soft);
}
.yt-result__box h3 { margin: 0 0 var(--trs-2); }
.yt-download {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: var(--trs-3);
  padding: 10px 20px;
  border-radius: var(--trs-radius);
  background: var(--trs-positive);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

/* --- Blog pagination ---------------------------------------------------- */
.navigation .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--trs-2);
  justify-content: center;
  margin-top: var(--trs-10);
}
.navigation .nav-links a,
.navigation .nav-links .current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 var(--trs-3);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text);
  font-weight: 600;
  text-decoration: none;
}
.navigation .nav-links a:hover { border-color: var(--trs-brand); color: var(--trs-brand); }
.navigation .nav-links .current { background: var(--trs-brand); border-color: var(--trs-brand); color: var(--trs-on-brand); }

/* ---------------------------------------------------------------------------
 * Tool result panels.
 *
 * Grouped rather than styled one-by-one: these are the containers each tool
 * reveals after it runs. Most carry `display:none` inline until then, so they
 * render only in use — which is exactly why they survived the earlier passes.
 * ------------------------------------------------------------------------ */

/* Result grids */
.titles-grid, .quality-grid, .earnings-grid, .data-grid, .trending-grid,
.thumbnails-grid, .duration-grid, .options-grid, .checkbox-grid, .breakdown-grid,
.age-stats-grid, .url-results-grid, .channel-grid, .names-grid, .audit-grid,
.checklist-grid, .analytics-grid, .playlist-items, .tags-cloud, .resolution-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--trs-3);
  margin-top: var(--trs-4);
}
.tags-cloud, .resolution-badges { display: flex; flex-wrap: wrap; }

/* Result cards and panels */
.quality-card, .earnings-card, .duration-card, .score-card, .channel-age-card,
.stat-box, .preview-box, .screenshot-box, .winner-display, .engagement-score-card,
.optimization-recommendations-card, .video-info-mini, .video-preview-mini,
.channel-header-mini, .playlist-info, .playlist-stats, .picker-stats, .embed-results,
.embed-preview-container, .restriction-results, .logo-banner-results,
.keyword-explorer-results, .title-description-seo-results, .raw-json-section,
.earnings-breakdown, .cpm-settings-display, .score-summary, .seo-checklist,
.all-comments-list, .video-details, .age-breakdown, .analysis-content,
.age-stat-item, .breakdown-item, .checkbox-item, .cpm-setting-item,
.duration-saved, .duration-speed, .tr4-frame-feed, .tr4-frame-sidebar {
  padding: var(--trs-4);
  border: 1px solid var(--trs-border);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
}

/* Numeric readouts */
.earnings-value, .duration-value, .min-earnings, .max-earnings, .avg-earnings,
.estimated-earnings-display {
  color: var(--trs-text);
  font-size: var(--trs-fs-2xl);
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.earnings-disclaimer { margin-top: var(--trs-3); color: var(--trs-text-faint); font-size: var(--trs-fs-sm); }

/* Code output */
.code-output, .tags-textarea-box, .tool-textarea-large, .tr-cap-result-area {
  width: 100%;
  padding: var(--trs-4);
  border: 1px solid var(--trs-border-strong);
  border-radius: var(--trs-radius);
  background: var(--trs-surface-2);
  color: var(--trs-text);
  font-family: var(--trs-mono);
  font-size: var(--trs-fs-sm);
  line-height: 1.6;
}

/* Misc structural leftovers */
.tr-tool-form { display: block; }
.tr-tool-select {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--trs-3) var(--trs-4);
  border: 1px solid var(--trs-border-strong);
  border-radius: var(--trs-radius);
  background: var(--trs-surface);
  color: var(--trs-text);
  font: inherit;
}
.form-section { margin-bottom: var(--trs-6); }
.box-header, .header-info, .channel-header, .playlist-header {
  display: flex;
  align-items: center;
  gap: var(--trs-3);
  margin-bottom: var(--trs-3);
}
.timestamp-row { display: flex; flex-wrap: wrap; gap: var(--trs-2); margin-bottom: var(--trs-2); }
.time-input { max-width: 120px; }
.desc-input { flex: 1; min-width: 200px; }
.picker-action, .yt-form { margin-top: var(--trs-4); }
.btn-icon { display: inline-flex; }
.url-desc { color: var(--trs-text-muted); font-size: var(--trs-fs-sm); }
.video-container, .video-thumbnail-container, .img-preview, .score-circle-container {
  max-width: 100%;
}
.img-preview img, .video-thumbnail-container img { max-width: 100%; height: auto; border-radius: var(--trs-radius); }

/* --- Final button leftovers --------------------------------------------
 * The last of the orphaned classes. Everything else still flagged by
 * retire/cssaudit.py is WordPress semantics that never carried styling
 * (`tag-*`, `size-medium_large`, `category-blog`, `next`) or a bare <form>
 * wrapper whose fields are already styled above.
 * ------------------------------------------------------------------------ */
.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--trs-brand);
  font-size: var(--trs-fs-sm);
  font-weight: 600;
  text-decoration: none;
}
.guide-link:hover { text-decoration: underline; }

.download-btn-primary,
.add-btn,
.pick-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--trs-2);
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid var(--trs-brand);
  border-radius: var(--trs-radius);
  background: var(--trs-brand);
  color: var(--trs-on-brand);
  font-size: var(--trs-fs-base);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--trs-t) var(--trs-ease);
}
.download-btn-primary:hover,
.add-btn:hover,
.pick-button:hover {
  background: var(--trs-brand-hover);
  border-color: var(--trs-brand-hover);
  color: var(--trs-on-brand);
}
.btn-text { display: inline; }