/* ==========================================================================
   mhtmltopdf.online | Modern Minimalist Stylesheet with Dark & Light Mode
   ========================================================================== */

:root,
[data-theme="dark"] {
  /* DARK MODE (Electric Sky Cyan & Midnight Slate Palette) */
  --c-midnight: #080b16;
  --c-navy: #0d1224;
  --c-sky: #38bdf8;
  --c-beige: #818cf8;

  --bg-core: #080b16;
  --bg-card: rgba(13, 18, 36, 0.85);
  --bg-input: rgba(15, 23, 42, 0.75);
  --bg-header: rgba(8, 11, 22, 0.92);
  --bg-footer: #05070e;
  --bg-diagram: rgba(13, 18, 36, 0.65);
  --bg-node: rgba(15, 23, 42, 0.7);
  --bg-node-icon: rgba(8, 11, 22, 0.85);

  --text-primary: #FFFFFF;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-brand: #FFFFFF;
  --text-sub: var(--c-sky);
  --text-code: var(--c-sky);

  --border-subtle: rgba(56, 189, 248, 0.16);
  --border-active: #38bdf8;
  --border-gold: rgba(56, 189, 248, 0.28);

  --gold-gradient: linear-gradient(135deg, #38bdf8 0%, #00d2ff 100%);
  --cyan-accent: #38bdf8;

  --btn-convert-bg: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 100%);
  --btn-convert-text: #080b16;
  --btn-convert-hover: #7dd3fc;
  --btn-convert-shadow: 0 4px 18px rgba(56, 189, 248, 0.35);

  --btn-download-bg: #10B981;
  --btn-download-text: #FFFFFF;

  --output-bg: rgba(15, 23, 42, 0.85);
  --output-border: #38bdf8;
  --output-text: #38bdf8;
  --output-pill-bg: rgba(56, 189, 248, 0.18);
  --output-pill-text: #38bdf8;

  --shadow-card: 0 24px 64px -12px rgba(0, 0, 0, 0.8), 0 0 40px rgba(56, 189, 248, 0.07);
  --shadow-glow-sky: 0 0 16px rgba(56, 189, 248, 0.35);
  --shadow-glow-gold: 0 0 16px rgba(56, 189, 248, 0.4);

  --ambient-opacity: 0.65;

  --font-display: 'Outfit', sans-serif;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.16s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   LIGHT MODE (Default - Clean, High-Contrast Precision Theme)
   ========================================================================== */
[data-theme="light"] {
  --c-midnight: #0F172A;
  --c-navy: #1E293B;
  --c-sky: #0284C7;
  --c-beige: #4F46E5;

  --bg-core: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-input: #FFFFFF;
  --bg-header: rgba(255, 255, 255, 0.92);
  --bg-footer: #F8FAFC;
  --bg-diagram: #F1F5F9;
  --bg-node: #FFFFFF;
  --bg-node-icon: #E0F2FE;

  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-brand: #0F172A;
  --text-sub: #0369A1;
  --text-code: #0369A1;

  --border-subtle: #CBD5E1;
  --border-active: #0284C7;
  --border-gold: #94A3B8;

  --gold-gradient: linear-gradient(135deg, #0284C7 0%, #1D4ED8 100%);
  --cyan-accent: #0284C7;

  --btn-convert-bg: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  --btn-convert-text: #FFFFFF;
  --btn-convert-hover: linear-gradient(135deg, #0369A1 0%, #1D4ED8 100%);
  --btn-convert-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);

  --btn-download-bg: #10B981;
  --btn-download-text: #FFFFFF;

  --output-bg: #F0F9FF;
  --output-border: #0284C7;
  --output-text: #0369A1;
  --output-pill-bg: #E0F2FE;
  --output-pill-text: #0369A1;

  --shadow-card: 0 16px 40px -10px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04), 0 0 0 1px rgba(203, 213, 225, 0.7);
  --shadow-glow-sky: 0 0 16px rgba(2, 132, 199, 0.2);
  --shadow-glow-gold: 0 0 16px rgba(37, 99, 235, 0.25);

  --ambient-opacity: 0.7;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-core);
  color: var(--text-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body {
  position: relative;
  min-height: 100vh;
  background-color: var(--bg-core);
  overflow-x: hidden;
  line-height: 1.5;
  transition: background-color var(--transition-normal);
}

[data-theme="light"] body {
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(14, 165, 233, 0.10), transparent 70%);
}

/* Ambient Lighting */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: var(--ambient-opacity);
  transition: opacity var(--transition-normal);
}

.glow-top-left {
  width: 550px;
  height: 550px;
  top: -200px;
  left: -200px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.35) 0%, transparent 70%);
}

.glow-top-right {
  width: 600px;
  height: 600px;
  top: -150px;
  right: -200px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22) 0%, transparent 70%);
}

.glow-center {
  width: 700px;
  height: 450px;
  top: 25%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, rgba(99, 102, 241, 0.12) 50%, transparent 80%);
}

[data-theme="light"] .glow-top-left {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
}

[data-theme="light"] .glow-top-right {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, transparent 70%);
}

[data-theme="light"] .glow-center {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, rgba(99, 102, 241, 0.06) 50%, transparent 80%);
}

/* Containers */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.compact-container {
  max-width: 980px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  width: 100%;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(13, 18, 36, 0.9));
  border: 1px solid var(--border-active);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.25);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

[data-theme="light"] .logo-mark {
  background: linear-gradient(135deg, #E0F2FE, #BAE6FD);
  border-color: #0284C7;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.2);
}

.brand-logo:hover .logo-mark {
  transform: scale(1.04);
}

.logo-text {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-brand);
  line-height: 1.1;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.brand-sub {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-sub);
  font-weight: 700;
  white-space: nowrap;
}

.gold-gradient-text {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 1;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 4px 2px;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

/* Header Right Actions */
.header-right-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-right-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 9999px;
  padding: 5px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--c-sky);
  white-space: nowrap;
  flex-shrink: 0;
}

[data-theme="light"] .header-right-status {
  background: #F0F9FF;
  border: 1px solid #BAE6FD;
  color: #0369A1;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(2, 132, 199, 0.08);
}

.status-text-pill {
  white-space: nowrap;
}

.status-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-sky);
  box-shadow: 0 0 6px var(--c-sky);
  animation: pulse 2s infinite ease-in-out;
  flex-shrink: 0;
}

[data-theme="light"] .status-pulse-dot {
  background: #0284C7;
  box-shadow: 0 0 6px rgba(2, 132, 199, 0.5);
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 6px 14px;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  height: 36px;
  transition: all var(--transition-fast);
}

[data-theme="light"] .theme-toggle-btn {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #1E293B;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

[data-theme="light"] .theme-toggle-btn:hover {
  background: #F8FAFC;
  border-color: #0284C7;
  color: #0284C7;
}

[data-theme="light"] .brand-title {
  color: #0F172A;
}

[data-theme="light"] .nav-link {
  color: #334155;
}

[data-theme="light"] .nav-link:hover,
[data-theme="light"] .nav-link.active {
  color: #0284C7;
}

[data-theme="light"] .header-brand {
  color: #0F172A;
}

[data-theme="light"] .header-brand span {
  color: #0F172A;
}

[data-theme="light"] .header-nav a {
  color: #334155;
}

[data-theme="light"] .header-nav a:hover {
  color: #0284C7;
}

/* Icon Switching Logic */
.icon-sun {
  display: inline-block;
  color: #FBBF24;
}

.icon-moon {
  display: none;
  color: #0284C7;
}

[data-theme="light"] .icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: inline-block;
}

/* Viewport Hero Section */
.viewport-hero-section {
  padding: 36px 0 34px 0;
}

.hero-text-wrap {
  text-align: center;
  margin-bottom: 24px;
}

.modern-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.3rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

.cyan-accent {
  color: var(--cyan-accent);
}

[data-theme="light"] .modern-hero-title .cyan-accent {
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.modern-hero-sub {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Compact Modern Master Card */
.modern-master-card {
  max-width: 980px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  padding: 28px 32px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

/* Card Top Bar: Mode Pills & Engine Label */
.card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.mode-toggle-pills {
  display: inline-flex;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 3px;
  gap: 4px;
}

.mode-pill {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.mode-pill.active {
  background: rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border: 1px solid var(--c-sky);
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.35);
}

[data-theme="light"] .mode-pill.active {
  background: #0284C7;
  color: #FFFFFF;
  border-color: #0284C7;
}

.btn-action-download.btn-success {
  background: #10B981 !important;
  color: #ffffff !important;
  border-color: #10B981 !important;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.5) !important;
}

.btn-action-download.btn-success:hover {
  background: #059669 !important;
  border-color: #059669 !important;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.7) !important;
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-sky);
}

[data-theme="light"] .pill-dot {
  background: #FFFFFF;
}

/* Sample Pills Row */
.sample-pills-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.sample-chip {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sample-chip:hover {
  border-color: var(--c-sky);
  color: var(--text-primary);
}

.sample-chip.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--border-active);
  color: var(--c-sky);
}

[data-theme="light"] .sample-chip.active {
  background: #E0F2FE;
  border-color: #0284C7;
  color: #0369A1;
}

.engine-tag-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* Master Grid Layout: Dropzone (Left) + 2x2 Settings (Right) */
.master-grid-layout {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 20px;
}

/* Dropzone */
.dropzone-modern-box {
  background: var(--bg-input);
  border: 1.5px dashed var(--border-subtle);
  border-radius: 14px;
  padding: 20px 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 12px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  min-height: 160px;
}

[data-theme="light"] .dropzone-modern-box {
  border-color: #94A3B8;
  background: #FFFFFF;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
}

.dropzone-modern-box:hover,
.dropzone-modern-box.drag-active {
  border-color: var(--c-sky);
  box-shadow: var(--shadow-glow-sky);
}

.dropzone-modern-box.drag-active {
  background: rgba(56, 189, 248, 0.12);
}

[data-theme="light"] .dropzone-modern-box:hover,
[data-theme="light"] .dropzone-modern-box.drag-active {
  background: #F0F9FF;
  border-color: #0284C7;
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.15);
}

.file-input-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon-circle {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--c-sky);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}

[data-theme="light"] .dropzone-icon-circle {
  background: #E0F2FE;
  border-color: #BAE6FD;
  color: #0284C7;
}

.dropzone-filename {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

[data-theme="light"] .dropzone-filename {
  color: #0F172A;
}

.dropzone-hint {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 2px;
}

[data-theme="light"] .dropzone-hint {
  color: #475569;
}

.file-format-badge {
  margin-top: 8px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-sky);
  font-weight: 600;
}

[data-theme="light"] .file-format-badge {
  background: #E0F2FE;
  border-color: #BAE6FD;
  color: #0369A1;
  font-weight: 700;
}

/* URL Input Box */
.url-modern-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 140px;
}

[data-theme="light"] .url-modern-box {
  border-color: #CBD5E1;
  background: #F8FAFC;
}

.url-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-node);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 6px 6px 6px 12px;
  width: 100%;
  max-width: 500px;
}

[data-theme="light"] .url-input-wrapper {
  background: #FFFFFF;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.url-icon {
  color: var(--text-muted);
  margin-right: 10px;
  display: flex;
}

.modern-url-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  min-width: 0;
}

.modern-btn-fetch {
  background: var(--c-sky);
  color: #080b16;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modern-btn-fetch:hover {
  background: #7dd3fc;
}

/* 2x2 Setting Inputs */
.settings-modern-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 420px) {
  .settings-modern-grid {
    grid-template-columns: 1fr !important;
  }
}

.setting-item-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setting-item-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.select-field-wrap {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  position: relative;
  transition: all var(--transition-fast);
}

[data-theme="light"] .setting-item-label {
  color: #334155;
  font-weight: 700;
}

[data-theme="light"] .select-field-wrap {
  border-color: #CBD5E1;
  background: #FFFFFF;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .select-field-wrap:hover,
[data-theme="light"] .select-field-wrap:focus-within {
  border-color: #0284C7;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.12);
}

.select-field-wrap:hover, .select-field-wrap:focus-within {
  border-color: var(--c-sky);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.25);
}

.modern-select {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-sans);
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 22px;
}

.modern-select option {
  background: var(--bg-core);
  color: var(--text-primary);
}

[data-theme="light"] .modern-select option {
  background: #FFFFFF;
  color: #0F172A;
}

.custom-arrow {
  position: absolute;
  right: 12px;
  font-size: 0.75rem;
  color: var(--c-sky);
  pointer-events: none;
}

[data-theme="light"] .custom-arrow {
  color: #0284C7;
}

/* Modern Visual Bridge (Centerpiece) */
.modern-diagram-bridge {
  background: var(--bg-diagram);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  overflow-x: auto;
  min-width: 0;
}

.bridge-active-glow {
  border-color: var(--c-sky) !important;
  box-shadow: var(--shadow-glow-sky) !important;
}

.bridge-step-node {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-node);
  border: 1px solid transparent;
  border-radius: 9px;
  padding: 8px 14px;
  flex-shrink: 1;
  min-width: 0;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

[data-theme="light"] .modern-diagram-bridge {
  background: #F8FAFC;
  border-color: #CBD5E1;
  box-shadow: inset 0 1px 3px rgba(15, 23, 42, 0.03);
}

[data-theme="light"] .bridge-step-node {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .node-name {
  color: #0F172A;
}

[data-theme="light"] .node-desc {
  color: #475569;
  font-weight: 500;
}

[data-theme="light"] .bridge-step-node:hover {
  border-color: #0284C7;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.1);
}

.node-icon-box {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--bg-node-icon);
  border: 1px solid rgba(110, 172, 218, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--c-sky);
}

[data-theme="light"] .node-icon-box {
  background: #E0F2FE;
  border-color: #BAE6FD;
  color: #0284C7;
}

.gear-box {
  color: var(--c-sky);
  border-color: rgba(56, 189, 248, 0.3);
}

[data-theme="light"] .gear-box {
  background: #EDE9FE;
  color: #6366F1;
  border-color: #DDD6FE;
}

.pdf-box {
  background: var(--c-sky);
  border-color: var(--c-sky);
}

[data-theme="light"] .pdf-box {
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  border-color: #0284C7;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.25);
}

.code-glyph {
  font-family: var(--font-mono);
  font-weight: bold;
}

.pdf-glyph {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 900;
  color: #080b16;
}

[data-theme="light"] .pdf-glyph {
  color: #FFFFFF;
}

.node-text {
  display: flex;
  flex-direction: column;
}

.node-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.node-desc {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.node-step-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--c-sky);
  border: 1px solid rgba(56, 189, 248, 0.25);
  flex-shrink: 0;
  margin-right: 2px;
}

[data-theme="light"] .node-step-tag {
  background: #E0F2FE;
  color: #0369A1;
  border: 1px solid #BAE6FD;
  font-weight: 700;
}

.bridge-connector {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  min-width: 44px;
  padding: 0 4px;
}

.connector-track {
  flex: 1;
  height: 2px;
  background: rgba(56, 189, 248, 0.25);
  border-radius: 2px;
}

[data-theme="light"] .connector-track {
  background: #CBD5E1;
}

.connector-arrow-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--c-sky);
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.12);
  transition: all var(--transition-fast);
}

.connector-arrow-badge svg {
  display: block;
  width: 12px;
  height: 12px;
  stroke: currentColor;
}

[data-theme="light"] .connector-arrow-badge {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #0284C7;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.connector-arrow {
  font-size: 1rem;
  color: var(--c-sky);
  font-weight: 800;
  line-height: 1;
  user-select: none;
  opacity: 0.85;
}

[data-theme="light"] .connector-arrow {
  color: #0284C7;
  opacity: 1;
}

/* Progress Box */
.modern-progress-box {
  background: var(--bg-diagram);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 14px;
}

.progress-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  margin-bottom: 6px;
}

.progress-title-text {
  color: var(--text-secondary);
}

.progress-percent-text {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-sky);
}

.progress-track-bg {
  width: 100%;
  height: 5px;
  background: var(--bg-core);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill,
.progress-fill-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    #38bdf8 0%,
    #0ea5e9 50%,
    #10B981 100%
  );
  background-size: 200% 100%;
  width: 0%;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  animation: progress-shimmer 1.5s linear infinite;
  border-radius: 9999px;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
}

@keyframes progress-shimmer {
  from { background-position: 200% center; }
  to { background-position: -200% center; }
}

/* Bottom Unified Action Bar */
.bottom-action-bar {
  display: grid;
  grid-template-columns: 1.15fr auto;
  align-items: center;
  gap: 16px;
}

.result-display-wrapper {
  background: var(--output-bg);
  border: 1.5px solid var(--output-border);
  border-radius: 10px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.35), inset 0 0 8px rgba(56, 189, 248, 0.06);
  overflow: hidden;
  transition: all var(--transition-fast);
}

[data-theme="light"] .result-display-wrapper {
  background: #F0F9FF;
  border-color: #0284C7;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.12), inset 0 1px 2px rgba(2, 132, 199, 0.04);
}

.result-badge-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-right: 8px;
}

[data-theme="light"] .result-badge-tag {
  color: #334155;
  font-weight: 700;
}

.result-name-text {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--output-text);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

[data-theme="light"] .result-name-text {
  color: #0369A1;
}

.dash-empty {
  color: var(--text-muted);
}

[data-theme="light"] .dash-empty {
  color: #64748B;
}

.output-filename-text {
  color: var(--text-primary);
  font-weight: 700;
}

[data-theme="light"] .output-filename-text {
  color: #0F172A;
}

.output-filemeta-text {
  font-size: 0.76rem;
  color: var(--c-sky);
  margin-left: 6px;
  font-weight: 500;
}

[data-theme="light"] .output-filemeta-text {
  color: #0369A1;
  font-weight: 600;
}

.result-status-pill {
  background: #DCFCE7;
  color: #15803D;
  border: 1px solid #86EFAC;
  border-radius: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  margin-left: 8px;
  transition: all var(--transition-fast);
}

[data-theme="light"] .result-status-pill {
  background: #DCFCE7;
  color: #15803D;
  border: 1px solid #86EFAC;
  font-weight: 700;
}

.result-status-pill.badge-success {
  background: #DCFCE7;
  color: #15803D;
  border-color: #86EFAC;
}

[data-theme="light"] .result-status-pill.badge-success {
  background: #DCFCE7;
  color: #15803D;
  border: 1px solid #86EFAC;
}

/* Action Buttons */
.action-buttons-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-action-reset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0 18px;
  height: 48px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

[data-theme="light"] .btn-action-reset {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #334155;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .btn-action-reset:hover {
  background: #F1F5F9;
  border-color: #94A3B8;
  color: #0F172A;
}

.btn-action-reset:hover {
  border-color: var(--c-sky);
  color: var(--text-primary);
}

.btn-action-convert {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--btn-convert-bg);
  border: 1px solid var(--border-gold);
  border-radius: 10px;
  color: var(--btn-convert-text);
  font-size: 0.92rem;
  font-weight: 800;
  padding: 0 26px;
  height: 48px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--btn-convert-shadow);
  white-space: nowrap;
}

.btn-action-convert:hover {
  background: linear-gradient(135deg, #7dd3fc 0%, #38bdf8 100%);
  box-shadow: 0 6px 22px rgba(56, 189, 248, 0.55);
  transform: translateY(-1px);
}

[data-theme="light"] .btn-action-convert {
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  color: #FFFFFF;
  border-color: #0284C7;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

[data-theme="light"] .btn-action-convert:hover {
  background: linear-gradient(135deg, #0369A1 0%, #1D4ED8 100%);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}

.btn-action-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--btn-download-bg);
  border: 1px solid var(--btn-download-bg);
  border-radius: 10px;
  color: var(--btn-download-text);
  font-size: 0.92rem;
  font-weight: 800;
  padding: 0 26px;
  height: 48px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-glow-sky);
  animation: pulseGlow 2s infinite ease-in-out;
  white-space: nowrap;
}

.btn-action-download:hover {
  background: #7dd3fc;
  color: #080b16;
  transform: translateY(-1px);
}

[data-theme="light"] .btn-action-download:hover {
  background: #0369A1;
  color: #FFFFFF;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 12px rgba(110, 172, 218, 0.3); }
  50% { box-shadow: 0 0 22px rgba(110, 172, 218, 0.6); }
}

/* Compact Secondary Sections */
.compact-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  transition: border-color var(--transition-normal);
}

.section-badge-center {
  text-align: center;
  margin-bottom: 24px;
}

.sub-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--c-sky);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 4px;
}

[data-theme="light"] .sub-badge {
  color: #0284C7;
  font-weight: 800;
}

.sub-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

[data-theme="light"] .sub-title {
  color: #0F172A;
}

/* 3 Compact Steps */
.steps-compact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.step-mini-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 18px 16px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

[data-theme="light"] .step-mini-card {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 4px 16px -2px rgba(15, 23, 42, 0.04);
}

.step-mini-card:hover {
  transform: translateY(-2px);
  border-color: var(--c-sky);
}

[data-theme="light"] .step-mini-card:hover {
  border-color: #0284C7;
  box-shadow: 0 8px 24px -4px rgba(2, 132, 199, 0.12);
}

.step-badge-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--c-sky);
  display: inline-block;
  margin-bottom: 8px;
}

[data-theme="light"] .step-badge-num {
  color: #0284C7;
  font-weight: 800;
}

.step-mini-card h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

[data-theme="light"] .step-mini-card h4 {
  color: #0F172A;
}

.step-mini-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

[data-theme="light"] .step-mini-card p {
  color: #334155;
}

.step-mini-card code {
  background: rgba(3, 52, 110, 0.5);
  color: var(--text-code);
  padding: 1px 4px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

[data-theme="light"] .step-mini-card code {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #0369A1;
  font-weight: 600;
}

/* Features Compact Card */
.features-compact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 24px;
}

[data-theme="light"] .features-compact-card {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 4px 16px -2px rgba(15, 23, 42, 0.04);
}

.feat-mini-col h5 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-sky);
  margin-bottom: 8px;
}

[data-theme="light"] .feat-mini-col h5 {
  color: #0369A1;
  font-weight: 800;
}

.feat-mini-col p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

[data-theme="light"] .feat-mini-col p {
  color: #334155;
}

/* Compact FAQ List */
.compact-faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.compact-faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

[data-theme="light"] .compact-faq-card {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}

.compact-faq-card.active {
  border-color: var(--border-active);
}

[data-theme="light"] .compact-faq-card.active {
  border-color: #0284C7;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.08);
}

.faq-card-header {
  width: 100%;
  background: transparent;
  border: none;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

[data-theme="light"] .faq-card-header {
  color: #0F172A;
  font-weight: 700;
}

.faq-icon {
  font-size: 1.1rem;
  color: var(--c-sky);
}

[data-theme="light"] .faq-icon {
  color: #0284C7;
  font-weight: 700;
}

.faq-card-body {
  display: none;
  padding: 0 18px 14px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

[data-theme="light"] .faq-card-body {
  color: #334155;
}

.compact-faq-card.active .faq-card-body {
  display: block;
}

/* Minimal Footer */
.clean-footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border-subtle);
  padding: 24px 0;
  transition: background-color var(--transition-normal);
}

[data-theme="light"] .clean-footer {
  background: #F8FAFC;
  border-top: 1px solid #CBD5E1;
}

.clean-footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-brand);
}

[data-theme="light"] .footer-brand {
  color: #0F172A;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

[data-theme="light"] .footer-copy {
  color: #475569;
  font-weight: 500;
}

.footer-status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-sky);
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 3px 10px;
  border-radius: 9999px;
}

[data-theme="light"] .footer-status-pill {
  background: #F0F9FF;
  border-color: #BAE6FD;
  color: #0369A1;
  font-weight: 600;
}

.clean-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-sky);
  box-shadow: 0 0 6px var(--c-sky);
}

/* Toast Container */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 500;
}

.toast {
  background: var(--bg-header);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 10px 16px;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: 0.82rem;
  animation: toastIn 0.22s ease;
}

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Subpage & Layout Components */
.page-section {
  padding: 44px 0 64px;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

[data-theme="light"] .page-title {
  color: #0F172A;
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  padding: 28px;
  transition: all var(--transition-fast);
}

[data-theme="light"] .glass-card {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 16px 40px -10px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .page-content h2,
[data-theme="light"] .page-content h3 {
  color: #0F172A;
  font-weight: 700;
}

[data-theme="light"] .page-content p,
[data-theme="light"] .page-content ul,
[data-theme="light"] .page-content ol,
[data-theme="light"] .page-content li {
  color: #334155;
}

[data-theme="light"] .page-content code {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #0369A1;
  font-weight: 600;
}

[data-theme="light"] .page-content a {
  color: #0284C7;
  font-weight: 600;
}

[data-theme="light"] .page-content a:hover {
  color: #0369A1;
}

[data-theme="light"] .page-content strong {
  color: #0F172A;
}

[data-theme="light"] .last-updated {
  color: #475569;
  font-weight: 600;
}

/* Contact Form Components */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--c-sky);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--btn-convert-bg);
  color: var(--btn-convert-text);
  border: 1px solid var(--border-gold);
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 800;
  padding: 14px 28px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--btn-convert-shadow);
}

.btn-primary:hover {
  background: var(--btn-convert-hover);
  transform: translateY(-1px);
}

/* Light Mode Overrides for Contact Form */
[data-theme="light"] .contact-form label {
  color: #475569;
}

[data-theme="light"] .contact-form input,
[data-theme="light"] .contact-form textarea {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #0F172A;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .contact-form input:focus,
[data-theme="light"] .contact-form textarea:focus {
  border-color: #0284C7;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.14);
}

[data-theme="light"] .btn-primary {
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  color: #FFFFFF;
  border-color: #0284C7;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

[data-theme="light"] .btn-primary:hover {
  background: linear-gradient(135deg, #0369A1 0%, #1D4ED8 100%);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

/* Responsive Breakpoints */
@media (max-width: 1120px) {
  .header-right-status {
    display: none;
  }
  .nav-menu {
    gap: 16px;
  }
}

@media (max-width: 860px) {
  .header-container {
    padding: 0 16px;
    height: 62px;
  }

  .nav-menu {
    display: none;
  }

  .modern-hero-title {
    font-size: 2.2rem;
  }

  .modern-master-card {
    padding: 20px 16px;
  }

  .master-grid-layout {
    grid-template-columns: 1fr;
  }

  .settings-modern-grid {
    grid-template-columns: 1fr;
  }

  .modern-diagram-bridge {
    flex-direction: column;
    align-items: stretch;
  }

  .bridge-connector {
    flex-direction: column;
    height: 30px;
    width: auto;
    min-width: 0;
    margin: 4px 0;
    gap: 4px;
    padding: 0;
  }

  .bridge-connector .connector-track {
    width: 2px;
    height: 100%;
    flex: 1;
  }

  .bridge-connector .connector-arrow-badge svg {
    transform: rotate(90deg);
  }

  .bottom-action-bar {
    grid-template-columns: 1fr;
  }

  .settings-modern-grid {
    grid-template-columns: 1fr 1fr !important;
  }

  .steps-compact-grid {
    grid-template-columns: 1fr;
  }

  .features-compact-card {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   INTERACTIVE SCROLL REVEAL ANIMATIONS (Fluid, Modern, Premium)
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.fade-scale {
  transform: scale(0.97) translateY(20px);
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Stagger Delays for Rich Sequencing */
.stagger-1 { transition-delay: 0.08s; }
.stagger-2 { transition-delay: 0.16s; }
.stagger-3 { transition-delay: 0.24s; }
.stagger-4 { transition-delay: 0.32s; }

/* Interactive Hover Feedback */
.step-mini-card,
.features-compact-card,
.compact-faq-card,
.modern-master-card {
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.28s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.25s ease,
              background-color 0.25s ease;
}

.step-mini-card:hover {
  transform: translateY(-5px);
}

[data-theme="light"] .step-mini-card:hover {
  box-shadow: 0 12px 28px -6px rgba(2, 132, 199, 0.14), 0 2px 8px rgba(15, 23, 42, 0.04);
  border-color: #0284C7;
}

.compact-faq-card:hover {
  transform: translateY(-2px);
}

[data-theme="light"] .compact-faq-card:hover {
  box-shadow: 0 6px 20px -4px rgba(2, 132, 199, 0.10);
  border-color: #0284C7;
}

@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* Tool Card Box in All Tools Grid */
.tool-card-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.25s ease,
              box-shadow 0.25s ease;
}

.tool-card-box:hover {
  transform: translateY(-4px);
  border-color: var(--c-sky);
  box-shadow: 0 10px 24px -6px rgba(56, 189, 248, 0.2);
}

[data-theme="light"] .tool-card-box {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .tool-card-box:hover {
  border-color: #0284C7;
  box-shadow: 0 12px 28px -6px rgba(2, 132, 199, 0.14), 0 2px 8px rgba(15, 23, 42, 0.04);
}

.url-input-container {
  background: var(--bg-diagram);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  justify-content: center;
}

[data-theme="light"] .url-input-container {
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
}

/* ==========================================================================
   SAMPLE DOCUMENT COMPONENT
   ========================================================================== */
.sample-document {
  background: var(--bg-diagram);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

[data-theme="light"] .sample-document {
  background: #F8FAFC;
  border-color: #CBD5E1;
}

.sample-document > div:first-child {
  flex: 1;
  min-width: 0;
}

.sample-document strong {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
}

[data-theme="light"] .sample-document strong {
  color: #0F172A;
}

.sample-document p {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

[data-theme="light"] .sample-document p {
  color: #475569;
}

.sample-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.sample-action {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 7px;
  font-size: 0.76rem;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--c-sky);
}

.sample-action:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--c-sky);
  color: var(--text-primary);
  text-decoration: none;
  transform: translateY(-1px);
}

[data-theme="light"] .sample-action {
  background: #E0F2FE;
  border-color: #BAE6FD;
  color: #0369A1;
}

[data-theme="light"] .sample-action:hover {
  background: #BAE6FD;
  border-color: #0284C7;
  color: #0284C7;
}

/* ==========================================================================
   INLINE PAGE MOBILE NAVIGATION (ConverterToolPage & index.astro)
   ========================================================================== */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 7px 8px;
  cursor: pointer;
  color: var(--text-secondary);
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.mobile-menu-btn:hover {
  border-color: var(--c-sky);
  color: var(--text-primary);
}

[data-theme="light"] .mobile-menu-btn {
  border-color: #CBD5E1;
  color: #334155;
  background: #FFFFFF;
}

[data-theme="light"] .mobile-menu-btn:hover {
  border-color: #0284C7;
  color: #0284C7;
}

.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 11, 22, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 99;
  padding: 32px 28px;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}

[data-theme="light"] .mobile-menu-overlay {
  background: rgba(248, 250, 252, 0.97);
  border-top: 1px solid #CBD5E1;
}

.mobile-menu-overlay.is-open {
  display: flex;
}

.mobile-menu-overlay a {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition-fast);
}

.mobile-menu-overlay a:hover {
  color: var(--c-sky);
  text-decoration: none;
}

[data-theme="light"] .mobile-menu-overlay a {
  color: #334155;
  border-bottom-color: #E2E8F0;
}

[data-theme="light"] .mobile-menu-overlay a:hover {
  color: #0284C7;
}

@media (max-width: 860px) {
  .mobile-menu-btn {
    display: inline-flex;
  }
}

/* ==========================================================================
   FOOTER LINK HOVER (inline footer links)
   ========================================================================== */
.footer-links-row a {
  transition: color var(--transition-fast) !important;
}

.footer-links-row a:hover {
  color: var(--c-sky) !important;
  text-decoration: none !important;
}

[data-theme="light"] .footer-links-row a:hover {
  color: #0284C7 !important;
}

/* ==========================================================================
   LIGHT MODE FIXES
   ========================================================================== */
[data-theme="light"] .clean-status-dot {
  background: #0284C7;
  box-shadow: 0 0 6px rgba(2, 132, 199, 0.4);
}

[data-theme="light"] .sub-title {
  color: #0F172A;
}

/* Fix mastergrid single column gap on mobile */
@media (max-width: 860px) {
  .master-grid-layout {
    gap: 16px;
  }

  .modern-master-card {
    padding: 16px;
  }
}

@media (max-width: 540px) {
  .settings-modern-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 10px;
  }

  .select-field-wrap {
    height: 44px;
  }

  .bottom-action-bar {
    gap: 10px;
  }

  .action-buttons-group {
    gap: 8px;
  }

  .btn-action-convert,
  .btn-action-download {
    padding: 0 16px;
    font-size: 0.84rem;
  }

  .btn-action-reset {
    padding: 0 12px;
  }

  .result-display-wrapper {
    height: 44px;
  }
}

/* Improve diagram bridge readability on small screens */
@media (max-width: 480px) {
  .settings-modern-grid {
    grid-template-columns: 1fr !important;
  }

  .modern-diagram-bridge {
    padding: 10px 12px;
  }

  .bridge-step-node {
    padding: 8px 10px;
  }

  .node-icon-box {
    width: 24px;
    height: 24px;
  }
}

/* Keep filenames and converter controls usable on small screens */
.input-source-area, .result-display-wrapper, .result-name-text, .dropzone-info { min-width: 0; }
.result-name-text, .dropzone-filename { overflow-wrap: anywhere; }
.url-input-container input, [id^="urlWrap-"] input { width: 100%; min-width: 0; }
button:disabled { cursor: wait; opacity: 0.65; }
[role="button"]:focus-visible { outline: 2px solid #0284c7; outline-offset: 3px; }

/* SEO Content & Comparison Table Styles */
.seo-content-section {
  padding: 40px 0;
}

.seo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 32px;
  margin-bottom: 28px;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.25);
  transition: border-color var(--transition-fast);
}

[data-theme="light"] .seo-card {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
}

.seo-heading-2 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 0;
  margin-bottom: 16px;
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 10px;
}

[data-theme="light"] .seo-heading-2 {
  color: #0F172A;
}

.seo-heading-3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--c-sky);
  margin-top: 24px;
  margin-bottom: 12px;
}

[data-theme="light"] .seo-heading-3 {
  color: #0369A1;
}

.seo-paragraph {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 16px;
}

[data-theme="light"] .seo-paragraph {
  color: #334155;
}

.seo-paragraph strong {
  color: var(--text-primary);
}

[data-theme="light"] .seo-paragraph strong {
  color: #0F172A;
}

.seo-list {
  padding-left: 22px;
  margin-bottom: 18px;
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.65;
}

[data-theme="light"] .seo-list {
  color: #334155;
}

.seo-list li {
  margin-bottom: 8px;
}

.seo-list li strong {
  color: var(--text-primary);
}

[data-theme="light"] .seo-list li strong {
  color: #0F172A;
}

.seo-table-container {
  overflow-x: auto;
  margin: 22px 0;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

[data-theme="light"] .seo-table-container {
  border: 1px solid #CBD5E1;
  background: #FFFFFF;
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.seo-table th {
  background: rgba(2, 132, 199, 0.08);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border-subtle);
  white-space: nowrap;
}

[data-theme="light"] .seo-table th {
  background: #F1F5F9;
  color: #0F172A;
  border-bottom: 2px solid #CBD5E1;
}

.seo-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.5;
}

[data-theme="light"] .seo-table td {
  border-bottom: 1px solid #E2E8F0;
  color: #334155;
}

.seo-table tr:last-child td {
  border-bottom: none;
}

.seo-table tr:hover td {
  background: rgba(56, 189, 248, 0.03);
}

[data-theme="light"] .seo-table tr:hover td {
  background: #F8FAFC;
}

.faq-h3-wrap {
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

@media (max-width: 640px) {
  .seo-card {
    padding: 20px 16px;
  }
  .seo-heading-2 {
    font-size: 1.3rem;
  }
  .seo-heading-3 {
    font-size: 1.05rem;
  }
  .seo-table th, .seo-table td {
    padding: 10px 12px;
    font-size: 0.82rem;
  }
}

/* ═══ High-Quality Footer (Matching Reference Layout) ═══ */
.hq-site-footer {
  background: #060913;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 28px;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  position: relative;
  z-index: 10;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .hq-site-footer {
  background: #F8FAFC;
  border-top: 1px solid #CBD5E1;
  color: #475569;
}

.hq-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.hq-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.6fr;
  gap: 40px;
  margin-bottom: 48px;
}

.hq-footer-col {
  display: flex;
  flex-direction: column;
}

.hq-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 14px;
}

.hq-brand-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

[data-theme="light"] .hq-brand-title {
  color: #0F172A;
}

.hq-brand-accent {
  background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hq-footer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  max-width: 320px;
}

[data-theme="light"] .hq-footer-desc {
  color: #64748B;
}

.hq-footer-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.hq-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.hq-meta-icon {
  color: var(--c-sky, #38bdf8);
  flex-shrink: 0;
}

[data-theme="light"] .hq-meta-icon {
  color: #0284C7;
}

.hq-meta-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--c-sky, #38bdf8);
  display: block;
}

[data-theme="light"] .hq-meta-label {
  color: #0284C7;
}

.hq-meta-val {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

[data-theme="light"] .hq-meta-val {
  color: #334155;
}

.hq-email-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.hq-email-link:hover {
  color: var(--c-sky, #38bdf8);
}

[data-theme="light"] .hq-email-link {
  color: #334155;
}

[data-theme="light"] .hq-email-link:hover {
  color: #0284C7;
}

.hq-social-row {
  display: flex;
  gap: 10px;
}

.hq-social-btn {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.hq-social-btn:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: #38bdf8;
  color: #ffffff;
  transform: translateY(-2px);
}

[data-theme="light"] .hq-social-btn {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #475569;
}

[data-theme="light"] .hq-social-btn:hover {
  background: #F0F9FF;
  border-color: #0284C7;
  color: #0284C7;
}

.hq-footer-heading {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-top: 0;
  margin-bottom: 20px;
}

[data-theme="light"] .hq-footer-heading {
  color: #0F172A;
}

.hq-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hq-footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.hq-footer-links a:hover {
  color: var(--c-sky, #38bdf8);
  transform: translateX(2px);
}

[data-theme="light"] .hq-footer-links a {
  color: #475569;
}

[data-theme="light"] .hq-footer-links a:hover {
  color: #0284C7;
}

.hq-lang-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.hq-lang-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.02);
  color: #94a3b8;
  text-decoration: none;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.hq-lang-pill:hover {
  border-color: #38bdf8;
  color: #ffffff;
  background: rgba(56, 189, 248, 0.08);
  transform: translateY(-1px);
}

.hq-lang-pill.active {
  border-color: #0284c7;
  color: #38bdf8;
  background: rgba(2, 132, 199, 0.15);
  box-shadow: 0 0 10px rgba(2, 132, 199, 0.2);
  font-weight: 700;
}

[data-theme="light"] .hq-lang-pill {
  border: 1px solid #CBD5E1;
  background: #FFFFFF;
  color: #334155;
}

[data-theme="light"] .hq-lang-pill:hover {
  border-color: #0284C7;
  color: #0284C7;
  background: #F0F9FF;
}

[data-theme="light"] .hq-lang-pill.active {
  border-color: #0284C7;
  color: #0284C7;
  background: #E0F2FE;
  font-weight: 700;
}

.hq-sub-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

[data-theme="light"] .hq-sub-footer {
  border-top: 1px solid #CBD5E1;
  color: #64748B;
}

.dmca-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(2, 132, 199, 0.15);
  border: 1px solid rgba(2, 132, 199, 0.4);
  font-size: 0.72rem;
  color: #38bdf8;
  user-select: none;
}

[data-theme="light"] .dmca-badge {
  background: #E0F2FE;
  border-color: #7DD3FC;
  color: #0284C7;
}

.dmca-brand {
  font-weight: 900;
  letter-spacing: 0.05em;
}

.dmca-label {
  font-weight: 600;
  opacity: 0.85;
}

@media (max-width: 1024px) {
  .hq-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .hq-site-footer {
    padding: 40px 0 24px;
  }
  .hq-footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hq-lang-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hq-sub-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}