/* ============================================================
   Upscaler.online — Main Stylesheet
   Prefix: us-*  |  Palette: Indigo + Cyan + Dark
   Fonts: Inter + JetBrains Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Indigo — primary */
  --us-indigo-950: #1e1b4b;
  --us-indigo-900: #312e81;
  --us-indigo-800: #3730a3;
  --us-indigo-700: #4338ca;
  --us-indigo-600: #4f46e5;
  --us-indigo-500: #5b5cf6;
  --us-indigo-400: #7c7dfa;
  --us-indigo-300: #a5a6fb;
  --us-indigo-200: #c7c8fd;
  --us-indigo-100: #e0e7ff;
  --us-indigo-50:  #eef2ff;

  /* Cyan — accent */
  --us-cyan-700: #0e7490;
  --us-cyan-600: #0891b2;
  --us-cyan-500: #06b6d4;
  --us-cyan-400: #22d3ee;
  --us-cyan-300: #67e8f9;
  --us-cyan-100: #cffafe;

  /* Emerald — quality badge */
  --us-emerald-600: #059669;
  --us-emerald-500: #10b981;
  --us-emerald-400: #34d399;
  --us-emerald-100: #d1fae5;

  /* Dark backgrounds */
  --us-dark-950:  #020208;
  --us-dark-900:  #06060f;
  --us-dark-850:  #090916;
  --us-dark-800:  #0c0c1c;
  --us-dark-750:  #0f0f22;
  --us-dark-700:  #131328;
  --us-dark-600:  #1c1c38;
  --us-dark-500:  #26264a;
  --us-dark-400:  #3a3a64;
  --us-dark-300:  #5555a0;
  --us-dark-200:  #8080c0;
  --us-dark-100:  #b0b0d8;
  --us-dark-50:   #d4d4ee;

  --us-white:   #ffffff;
  --us-error:   #ef4444;
  --us-success: #22c55e;

  /* Semantic */
  --us-primary:      var(--us-indigo-500);
  --us-primary-dark: var(--us-indigo-700);
  --us-accent:       var(--us-cyan-500);
  --us-bg:           var(--us-dark-900);
  --us-bg-card:      var(--us-dark-800);
  --us-bg-card2:     var(--us-dark-750);
  --us-text:         #e2e2f2;
  --us-text-dim:     var(--us-dark-100);
  --us-muted:        var(--us-dark-200);
  --us-border:       var(--us-dark-600);
  --us-border-light: var(--us-dark-500);

  --us-radius-sm: 6px;
  --us-radius:    12px;
  --us-radius-lg: 20px;
  --us-radius-xl: 28px;

  --us-shadow-sm: 0 1px 3px rgba(0,0,0,.5);
  --us-shadow:    0 4px 16px rgba(0,0,0,.5), 0 2px 6px rgba(0,0,0,.3);
  --us-shadow-lg: 0 12px 40px rgba(0,0,0,.6), 0 4px 16px rgba(0,0,0,.35);
  --us-shadow-xl: 0 24px 64px rgba(0,0,0,.7);
  --us-glow:      0 0 32px rgba(91,92,246,.18), 0 0 8px rgba(91,92,246,.1);
  --us-glow-lg:   0 0 64px rgba(91,92,246,.22), 0 0 24px rgba(91,92,246,.1);
  --us-glow-cyan: 0 0 24px rgba(6,182,212,.15);

  --us-font-sans: 'Inter', system-ui, sans-serif;
  --us-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --us-transition: 0.18s ease;
  --us-container: 1160px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--us-font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--us-text);
  background: var(--us-bg);
  -webkit-font-smoothing: antialiased;
}
img, video, svg { display: block; max-width: 100%; }
a { color: var(--us-indigo-300); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--us-indigo-200); }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }

/* ── Container ── */
.us-container {
  width: 100%;
  max-width: var(--us-container);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ── Typography ── */
.us-h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; line-height: 1.12; letter-spacing: -0.03em; }
.us-h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.025em; }
.us-h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); font-weight: 600; line-height: 1.3; }
.us-h4 { font-size: 1rem; font-weight: 600; line-height: 1.4; }
.us-lead { font-size: 1.1rem; line-height: 1.75; color: var(--us-muted); }
.us-mono { font-family: var(--us-font-mono); font-size: 0.875rem; }
.us-label {
  font-family: var(--us-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--us-cyan-400);
  font-weight: 500;
}
.us-text-center { text-align: center; }
.us-text-muted { color: var(--us-muted); }

/* ── Buttons ── */
.us-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--us-radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--us-transition);
  cursor: pointer;
  white-space: nowrap;
  border: 2px solid transparent;
  text-decoration: none;
}
.us-btn-primary {
  background: linear-gradient(135deg, var(--us-indigo-600), var(--us-indigo-500));
  color: var(--us-white);
  box-shadow: 0 4px 14px rgba(91,92,246,.4);
}
.us-btn-primary:hover {
  background: linear-gradient(135deg, var(--us-indigo-700), var(--us-indigo-600));
  box-shadow: 0 6px 20px rgba(91,92,246,.5);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--us-white);
}
.us-btn-cyan {
  background: linear-gradient(135deg, var(--us-cyan-600), var(--us-cyan-500));
  color: var(--us-dark-900);
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(6,182,212,.35);
}
.us-btn-cyan:hover {
  box-shadow: 0 6px 20px rgba(6,182,212,.45);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--us-dark-900);
}
.us-btn-outline {
  border-color: var(--us-border);
  color: var(--us-text);
  background: transparent;
}
.us-btn-outline:hover {
  border-color: var(--us-indigo-500);
  color: var(--us-indigo-300);
  text-decoration: none;
}
.us-btn-ghost { color: var(--us-muted); padding: 8px 16px; }
.us-btn-ghost:hover { color: var(--us-text); background: var(--us-bg-card); text-decoration: none; }
.us-btn-dark {
  background: var(--us-bg-card);
  color: var(--us-text);
  border-color: var(--us-border);
}
.us-btn-dark:hover {
  background: var(--us-bg-card2);
  border-color: var(--us-indigo-500);
  transform: translateY(-1px);
  text-decoration: none;
}
.us-btn-sm  { padding: 7px 16px; font-size: 0.82rem; border-radius: var(--us-radius-sm); }
.us-btn-lg  { padding: 14px 32px; font-size: 1rem; border-radius: var(--us-radius); }
.us-btn-xl  { padding: 16px 40px; font-size: 1.05rem; border-radius: var(--us-radius); }
.us-btn-full { width: 100%; justify-content: center; }
.us-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ── Cards ── */
.us-card {
  background: var(--us-bg-card);
  border-radius: var(--us-radius);
  border: 1px solid var(--us-border);
  box-shadow: var(--us-shadow-sm);
  padding: 28px;
  transition: box-shadow var(--us-transition), transform var(--us-transition), border-color var(--us-transition);
}
.us-card:hover { box-shadow: var(--us-shadow), var(--us-glow); transform: translateY(-2px); border-color: var(--us-indigo-800); }

/* ── Badge / Tag ── */
.us-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
}
.us-badge-indigo  { background: rgba(91,92,246,.12); color: var(--us-indigo-300); border: 1px solid rgba(91,92,246,.25); }
.us-badge-cyan    { background: rgba(6,182,212,.12); color: var(--us-cyan-300); border: 1px solid rgba(6,182,212,.25); }
.us-badge-emerald { background: rgba(16,185,129,.12); color: var(--us-emerald-400); border: 1px solid rgba(16,185,129,.25); }
.us-badge-dark    { background: var(--us-bg-card); color: var(--us-muted); border: 1px solid var(--us-border); }

/* ── Form Elements ── */
.us-input, .us-textarea, .us-select {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--us-border);
  border-radius: var(--us-radius-sm);
  background: var(--us-bg-card);
  color: var(--us-text);
  font-size: 0.9rem;
  transition: border-color var(--us-transition), box-shadow var(--us-transition);
  outline: none;
}
.us-input:focus, .us-textarea:focus, .us-select:focus {
  border-color: var(--us-indigo-500);
  box-shadow: 0 0 0 3px rgba(91,92,246,.12);
}
.us-input::placeholder { color: var(--us-muted); }
.us-form-label { display: block; font-size: 0.83rem; font-weight: 600; color: var(--us-text-dim); margin-bottom: 6px; }
.us-form-hint  { font-size: 0.78rem; color: var(--us-muted); margin-top: 4px; }

/* ── Range / Slider input ── */
.us-range {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--us-border);
  outline: none;
  cursor: pointer;
}
.us-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--us-indigo-500);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(91,92,246,.5);
}

/* ── Toggle switch ── */
.us-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.us-toggle input { display: none; }
.us-toggle-track {
  width: 40px; height: 22px;
  background: var(--us-border);
  border-radius: 11px;
  position: relative;
  transition: background var(--us-transition);
  flex-shrink: 0;
}
.us-toggle-track::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: white;
  transition: transform var(--us-transition);
}
.us-toggle input:checked + .us-toggle-track { background: var(--us-indigo-500); }
.us-toggle input:checked + .us-toggle-track::after { transform: translateX(18px); }

/* ── Divider ── */
.us-divider { height: 1px; background: var(--us-border); margin: 32px 0; }

/* ── Section spacing ── */
.us-section    { padding-block: 80px; }
.us-section-sm { padding-block: 48px; }
.us-section-lg { padding-block: 112px; }
.us-section-title { max-width: 620px; margin-inline: auto; margin-bottom: 56px; }
.us-section-title .us-label { margin-bottom: 12px; display: block; }

/* ── Grid ── */
.us-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.us-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.us-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.us-flex { display: flex; align-items: center; }
.us-flex-between { display: flex; align-items: center; justify-content: space-between; }
.us-gap-2 { gap: 8px; }
.us-gap-3 { gap: 12px; }
.us-gap-4 { gap: 16px; }

/* ── Header / Nav ── */
.us-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6,6,15,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--us-transition), background var(--us-transition);
}
.us-header.us-scrolled {
  border-bottom-color: var(--us-border);
  background: rgba(6,6,15,.97);
}
.us-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.us-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--us-text);
  text-decoration: none;
  flex-shrink: 0;
}
.us-logo:hover { text-decoration: none; color: var(--us-text); }
.us-logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--us-indigo-700), var(--us-indigo-500));
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(91,92,246,.4);
}
.us-logo-text span { color: var(--us-cyan-400); }
.us-nav { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.us-nav a {
  padding: 7px 13px;
  border-radius: var(--us-radius-sm);
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--us-muted);
  transition: all var(--us-transition);
  text-decoration: none;
}
.us-nav a:hover, .us-nav a.active { color: var(--us-indigo-200); background: rgba(91,92,246,.1); }
.us-nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.us-hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.us-hamburger span { display: block; width: 22px; height: 2px; background: var(--us-text); border-radius: 2px; transition: all var(--us-transition); }
.us-mobile-nav {
  display: none;
  flex-direction: column;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--us-border);
  background: var(--us-dark-900);
  gap: 4px;
}
.us-mobile-nav.open { display: flex; }
.us-mobile-nav a { padding: 10px 14px; border-radius: var(--us-radius-sm); color: var(--us-text); font-weight: 500; text-decoration: none; }
.us-mobile-nav a:hover { background: var(--us-bg-card); color: var(--us-indigo-300); }

/* ── Lang Switcher ── */
.us-lang-sw {
  position: relative;
  margin-left: 8px; border-left: 1px solid var(--us-border); padding-left: 12px;
}
.us-lang-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 6px; border: 1px solid var(--us-border);
  background: transparent; color: var(--us-muted); font-size: 0.78rem; font-weight: 600;
  cursor: pointer; transition: color .15s, border-color .15s; white-space: nowrap;
}
.us-lang-btn:hover { color: var(--us-indigo-300); border-color: var(--us-indigo-300); }
.us-lang-chevron { transition: transform .2s; }
.us-lang-btn[aria-expanded="true"] .us-lang-chevron { transform: rotate(180deg); }
.us-lang-dropdown {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--us-bg-card); border: 1px solid var(--us-border); border-radius: 8px;
  padding: 4px; min-width: 160px; z-index: 9999;
  display: none; flex-direction: column; gap: 1px;
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
}
.us-lang-dropdown.open { display: flex; }
.us-lang-dropdown a {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 5px;
  font-size: 0.82rem; color: var(--us-muted); text-decoration: none;
  transition: background .12s, color .12s;
}
.us-lang-dropdown a:hover { background: rgba(91,92,246,.12); color: var(--us-text); }
.us-lang-dropdown a.active { color: var(--us-indigo-300); background: rgba(91,92,246,.15); font-weight: 600; }
.us-lang-code {
  font-size: 0.72rem; font-weight: 700; color: inherit; opacity: .7;
  min-width: 26px;
}

/* ── RTL support ── */
[dir="rtl"] .us-header-inner { flex-direction: row-reverse; }
[dir="rtl"] .us-nav { flex-direction: row-reverse; }
[dir="rtl"] .us-lang-dropdown { right: auto; left: 0; }
[dir="rtl"] .us-footer-grid { direction: rtl; }
[dir="rtl"] .us-prose { direction: rtl; text-align: right; }

/* ── Hero ── */
.us-hero {
  padding-block: 96px 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.us-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 30%, rgba(91,92,246,.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 70% 60%, rgba(6,182,212,.05) 0%, transparent 60%);
  pointer-events: none;
}
.us-hero-label { margin-bottom: 20px; }
.us-hero-headline { color: var(--us-text); margin-bottom: 20px; }
.us-hero-headline .us-accent-indigo { color: var(--us-indigo-300); }
.us-hero-headline .us-accent-cyan   { color: var(--us-cyan-400); }
.us-hero-sub { max-width: 580px; margin-inline: auto; margin-bottom: 36px; }

.us-hero-cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 44px; }

.us-hero-social-proof {
  display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap;
}
.us-hero-avatars { display: flex; align-items: center; }
.us-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700;
  border: 2px solid var(--us-dark-900);
  margin-left: -8px;
}
.us-avatar:first-child { margin-left: 0; }
.us-avatar-a { background: linear-gradient(135deg,#5b5cf6,#7c7dfa); color: white; }
.us-avatar-b { background: linear-gradient(135deg,#06b6d4,#22d3ee); color: #06060f; }
.us-avatar-c { background: linear-gradient(135deg,#10b981,#34d399); color: #06060f; }
.us-avatar-d { background: linear-gradient(135deg,#8b5cf6,#a78bfa); color: white; }
.us-hero-social-text { font-size: 0.88rem; color: var(--us-muted); }

/* ── Before/After demo ── */
.us-hero-demo {
  margin-top: 56px;
  max-width: 820px;
  margin-inline: auto;
}
.us-hero-demo-inner {
  background: var(--us-bg-card);
  border: 1px solid var(--us-indigo-800);
  border-radius: var(--us-radius-lg);
  overflow: hidden;
  box-shadow: var(--us-shadow-xl), var(--us-glow-lg);
}
.us-hero-demo-bar {
  background: var(--us-bg-card2);
  padding: 12px 16px;
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--us-border);
}
.us-hero-demo-dots { display: flex; gap: 6px; }
.us-hero-demo-dots span { width: 12px; height: 12px; border-radius: 50%; }
.us-hero-demo-dots span:nth-child(1) { background: #ef4444; }
.us-hero-demo-dots span:nth-child(2) { background: var(--us-indigo-500); }
.us-hero-demo-dots span:nth-child(3) { background: var(--us-success); }
.us-hero-demo-title { font-size: 0.78rem; color: var(--us-muted); flex: 1; text-align: center; }
.us-demo-placeholder {
  aspect-ratio: 16/7;
  background: linear-gradient(135deg, var(--us-dark-800), var(--us-dark-700));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; color: var(--us-muted); position: relative; overflow: hidden;
}
.us-demo-placeholder::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0; width: 50%;
  background: linear-gradient(135deg, var(--us-dark-750), var(--us-dark-700));
  border-right: 2px solid rgba(91,92,246,.4);
}
.us-demo-labels {
  position: absolute; bottom: 16px; display: flex; gap: 0; width: 100%;
}
.us-demo-label {
  flex: 1; text-align: center; font-size: .75rem; font-weight: 600;
}
.us-demo-label.before { color: var(--us-muted); }
.us-demo-label.after  { color: var(--us-cyan-400); }
.us-demo-icon { font-size: 2.5rem; position: relative; z-index: 1; }
.us-demo-text { font-size: .85rem; position: relative; z-index: 1; }

/* ── Scale badges ── */
.us-scale-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.us-scale-pill {
  padding: 6px 18px;
  border-radius: 100px;
  font-size: .9rem; font-weight: 700;
  border: 2px solid var(--us-indigo-600);
  color: var(--us-indigo-300);
  background: rgba(91,92,246,.08);
  cursor: default;
}

/* ── Upload Zone ── */
.us-upload-zone {
  border: 2px dashed var(--us-border);
  border-radius: var(--us-radius-lg);
  padding: 56px 32px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--us-transition), background var(--us-transition);
  position: relative;
}
.us-upload-zone:hover, .us-upload-zone.drag-over {
  border-color: var(--us-indigo-500);
  background: rgba(91,92,246,.04);
}
.us-upload-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.us-upload-icon { font-size: 3rem; margin-bottom: 14px; }
.us-upload-title { font-size: 1.05rem; font-weight: 600; color: var(--us-text); margin-bottom: 6px; }
.us-upload-title strong { color: var(--us-indigo-300); }
.us-upload-hint { font-size: .82rem; color: var(--us-muted); }

/* ── Tool layout ── */
.us-tool-wrap {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px;
  align-items: start;
}
.us-tool-panel {
  background: var(--us-bg-card);
  border: 1px solid var(--us-border);
  border-radius: var(--us-radius-lg);
  padding: 24px;
}
.us-tool-panel-title {
  font-size: .82rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--us-muted); margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.us-tool-panel-title::before {
  content: '';
  display: block; width: 3px; height: 14px;
  background: var(--us-indigo-500); border-radius: 2px;
}

/* ── Model selector ── */
.us-model-cards { display: grid; gap: 10px; }
.us-model-opt {
  border: 1.5px solid var(--us-border);
  border-radius: var(--us-radius);
  padding: 14px;
  cursor: pointer;
  transition: all var(--us-transition);
  display: flex; gap: 12px; align-items: flex-start;
}
.us-model-opt input[type="radio"] { display: none; }
.us-model-opt.selected {
  border-color: var(--us-indigo-500);
  background: rgba(91,92,246,.06);
}
.us-model-opt:hover:not(.selected) { border-color: var(--us-dark-400); }
.us-model-opt-icon {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.us-model-opt-icon.fast { background: rgba(6,182,212,.12); }
.us-model-opt-icon.quality { background: rgba(91,92,246,.12); }
.us-model-opt-name { font-size: .9rem; font-weight: 700; color: var(--us-text); margin-bottom: 2px; }
.us-model-opt-label { font-size: .75rem; color: var(--us-muted); }

/* ── Scale selector ── */
.us-scale-btns { display: flex; gap: 8px; }
.us-scale-btn {
  flex: 1; padding: 10px 4px; text-align: center;
  border-radius: var(--us-radius-sm);
  font-size: .95rem; font-weight: 700; cursor: pointer;
  border: 1.5px solid var(--us-border); background: none; color: var(--us-muted);
  transition: all var(--us-transition);
}
.us-scale-btn.active { border-color: var(--us-indigo-500); color: var(--us-indigo-300); background: rgba(91,92,246,.1); }
.us-scale-btn:hover:not(.active):not(:disabled) { border-color: var(--us-dark-400); color: var(--us-text); }
.us-scale-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Result panel ── */
.us-result-panel {
  background: var(--us-bg-card);
  border: 1px solid var(--us-border);
  border-radius: var(--us-radius-lg);
  overflow: hidden;
}
.us-result-bar {
  background: var(--us-bg-card2);
  padding: 12px 20px;
  border-bottom: 1px solid var(--us-border);
  display: flex; align-items: center; justify-content: space-between;
  font-size: .82rem; color: var(--us-muted);
}
.us-result-body {
  min-height: 420px;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.us-result-placeholder { text-align: center; color: var(--us-muted); }
.us-result-placeholder-icon { font-size: 3.5rem; margin-bottom: 14px; }
.us-result-actions {
  padding: 16px 20px;
  border-top: 1px solid var(--us-border);
  display: flex; gap: 10px;
}

/* ── Before/After comparison slider ── */
.us-compare-wrap {
  position: relative;
  overflow: hidden;
  border-radius: var(--us-radius-sm);
  user-select: none;
  cursor: ew-resize;
}
.us-compare-before {
  position: relative;
  width: 100%;
}
.us-compare-before img {
  width: 100%; height: auto; display: block;
}
.us-compare-after {
  position: absolute; inset: 0;
  clip-path: inset(0 50% 0 0);
}
.us-compare-after img {
  width: 100%; height: 100%; object-fit: contain;
}
.us-compare-divider {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; background: white;
  transform: translateX(-50%);
  pointer-events: none;
}
.us-compare-handle {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  background: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 12px rgba(0,0,0,.5);
  pointer-events: none;
}
.us-compare-label {
  position: absolute; bottom: 10px;
  padding: 3px 10px; border-radius: 100px;
  font-size: .72rem; font-weight: 700;
}
.us-compare-label.before {
  left: 12px;
  background: rgba(0,0,0,.6); color: rgba(255,255,255,.8);
}
.us-compare-label.after {
  right: 12px;
  background: rgba(91,92,246,.8); color: white;
}

/* ── Progress ── */
.us-progress-wrap { text-align: center; }
.us-spinner {
  width: 48px; height: 48px;
  border: 3px solid var(--us-border);
  border-top-color: var(--us-indigo-500);
  border-radius: 50%;
  animation: us-spin .8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes us-spin { to { transform: rotate(360deg); } }
.us-progress-steps { display: flex; gap: 20px; justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.us-progress-step { display: flex; align-items: center; gap: 6px; font-size: .8rem; color: var(--us-muted); }
.us-progress-step.done { color: var(--us-emerald-400); }
.us-progress-step.active { color: var(--us-indigo-300); }
.us-progress-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--us-border);
}
.us-progress-step.done .us-progress-dot { background: var(--us-emerald-500); }
.us-progress-step.active .us-progress-dot { background: var(--us-indigo-500); animation: us-pulse 1s ease infinite; }
@keyframes us-pulse { 0%,100% { opacity:1; } 50% { opacity:.4; } }

/* ── Alert ── */
.us-alert {
  padding: 12px 16px;
  border-radius: var(--us-radius-sm);
  font-size: .88rem;
  display: none; align-items: flex-start; gap: 10px;
  margin-bottom: 16px;
}
.us-alert.visible { display: flex; }
.us-alert-error   { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.25); color: #fca5a5; }
.us-alert-success { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.25); color: #86efac; }
.us-alert-info    { background: rgba(91,92,246,.1); border: 1px solid rgba(91,92,246,.25); color: var(--us-indigo-200); }

/* ── Usage bar ── */
.us-usage-bar { background: var(--us-border); border-radius: 100px; height: 4px; margin-top: 6px; }
.us-usage-fill { height: 100%; border-radius: 100px; background: var(--us-indigo-500); transition: width .3s ease; }
.us-usage-text { font-size: .78rem; color: var(--us-muted); display: flex; justify-content: space-between; margin-bottom: 4px; }

/* ── Preview image ── */
.us-preview-img {
  width: 100%; border-radius: var(--us-radius-sm); object-fit: contain;
  max-height: 220px; margin-bottom: 12px; display: none;
}
.us-preview-info { font-size: .78rem; color: var(--us-muted); text-align: center; }

/* ── Model page cards ── */
.us-model-card {
  background: var(--us-bg);
  border-radius: var(--us-radius-lg);
  border: 1px solid var(--us-border);
  padding: 32px;
  transition: all var(--us-transition);
  position: relative; overflow: hidden;
}
.us-model-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--us-indigo-500), var(--us-cyan-500));
}
.us-model-card.fast-model::before {
  background: linear-gradient(90deg, var(--us-cyan-600), var(--us-cyan-400));
}
.us-model-card.featured {
  border-color: var(--us-indigo-700);
  box-shadow: var(--us-shadow), var(--us-glow);
}
.us-model-card:hover { transform: translateY(-4px); box-shadow: var(--us-shadow-lg), var(--us-glow-lg); }
.us-model-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; background: rgba(91,92,246,.12);
  border-radius: 100px; font-size: .72rem; font-weight: 600;
  color: var(--us-indigo-300); margin-bottom: 14px;
}
.us-model-badge.cyan { background: rgba(6,182,212,.12); color: var(--us-cyan-300); }
.us-model-icon { font-size: 2rem; margin-bottom: 12px; }
.us-model-name { font-size: 1.3rem; font-weight: 700; color: var(--us-text); margin-bottom: 6px; }
.us-model-sub { font-size: .8rem; color: var(--us-muted); margin-bottom: 16px; font-family: var(--us-font-mono); }
.us-model-features { list-style: none; }
.us-model-features li {
  padding: 7px 0;
  border-bottom: 1px solid var(--us-border);
  font-size: .88rem; color: var(--us-text-dim);
  display: flex; align-items: center; gap: 8px;
}
.us-model-features li:last-child { border-bottom: none; }
.us-model-features li::before { content: '✓'; font-size: .8rem; color: var(--us-indigo-400); flex-shrink: 0; }

/* ── Steps ── */
.us-step { display: flex; gap: 20px; align-items: flex-start; }
.us-step-num {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--us-indigo-600), var(--us-indigo-700));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700; color: white; flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(91,92,246,.35);
}
.us-step-content h3 { font-size: 1.05rem; font-weight: 600; color: var(--us-text); margin-bottom: 6px; }
.us-step-content p { font-size: .9rem; color: var(--us-muted); }

/* ── Pricing ── */
.us-pricing-card {
  background: var(--us-bg-card); border-radius: var(--us-radius-lg);
  border: 1px solid var(--us-border); padding: 36px; text-align: center;
}
.us-pricing-card.featured {
  border-color: var(--us-indigo-500);
  box-shadow: var(--us-shadow-lg), var(--us-glow);
  position: relative;
}
.us-pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--us-indigo-500); color: white;
  font-size: .75rem; font-weight: 700;
  padding: 4px 16px; border-radius: 100px; white-space: nowrap;
}
.us-pricing-plan { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--us-muted); margin-bottom: 12px; }
.us-pricing-price { font-size: 3rem; font-weight: 700; color: var(--us-text); line-height: 1; }
.us-pricing-price sup { font-size: 1.2rem; vertical-align: top; margin-top: 8px; }
.us-pricing-period { font-size: .85rem; color: var(--us-muted); margin-top: 6px; margin-bottom: 28px; }
.us-pricing-features { list-style: none; text-align: left; margin-bottom: 28px; }
.us-pricing-features li {
  padding: 8px 0; border-bottom: 1px solid var(--us-border);
  font-size: .88rem; color: var(--us-text-dim);
  display: flex; align-items: center; gap: 10px;
}
.us-pricing-features li:last-child { border-bottom: none; }
.us-pricing-features li .check { color: var(--us-indigo-300); }
.us-pricing-features li .no    { color: var(--us-muted); }

/* ── FAQ ── */
.us-faq-item { border-bottom: 1px solid var(--us-border); }
.us-faq-q {
  width: 100%; text-align: left; padding: 20px 0;
  font-size: 1rem; font-weight: 600; color: var(--us-text);
  background: none; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  transition: color var(--us-transition);
}
.us-faq-q:hover { color: var(--us-indigo-300); }
.us-faq-q::after {
  content: '+'; font-size: 1.4rem; font-weight: 300;
  color: var(--us-indigo-400); flex-shrink: 0;
  transition: transform var(--us-transition);
}
.us-faq-item.open .us-faq-q::after { transform: rotate(45deg); }
.us-faq-a { display: none; padding-bottom: 20px; font-size: .92rem; color: var(--us-muted); line-height: 1.7; }
.us-faq-item.open .us-faq-a { display: block; }

/* ── CTA Banner ── */
.us-cta-banner {
  background: linear-gradient(135deg, var(--us-indigo-950) 0%, var(--us-indigo-800) 50%, var(--us-indigo-600) 100%);
  padding-block: 72px; text-align: center;
  position: relative; overflow: hidden;
}
.us-cta-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(6,182,212,.08) 0%, transparent 60%);
  pointer-events: none;
}
.us-cta-banner h2 { color: white; font-size: clamp(1.6rem, 3vw, 2.4rem); margin-bottom: 16px; }
.us-cta-banner p  { color: rgba(255,255,255,.7); max-width: 480px; margin-inline: auto; margin-bottom: 32px; font-size: 1.05rem; }

/* ── Blog card ── */
.us-post-card { background: var(--us-bg-card); border-radius: var(--us-radius-lg); border: 1px solid var(--us-border); overflow: hidden; transition: all var(--us-transition); }
.us-post-card:hover { transform: translateY(-4px); box-shadow: var(--us-shadow-lg), var(--us-glow); border-color: var(--us-indigo-800); }
.us-post-thumb { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--us-dark-800), var(--us-dark-600)); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.us-post-body { padding: 22px; }
.us-post-meta { font-size: .78rem; color: var(--us-muted); margin-bottom: 10px; }
.us-post-title { font-size: 1.05rem; font-weight: 700; color: var(--us-text); margin-bottom: 8px; line-height: 1.35; }
.us-post-excerpt { font-size: .88rem; color: var(--us-muted); line-height: 1.6; }
.us-post-read { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: .85rem; font-weight: 600; color: var(--us-indigo-300); }

/* ── Prose ── */
.us-prose h1, .us-prose h2, .us-prose h3 { color: var(--us-text); margin-bottom: 16px; margin-top: 32px; }
.us-prose h2 { font-size: 1.5rem; }
.us-prose h3 { font-size: 1.15rem; }
.us-prose p  { color: var(--us-muted); margin-bottom: 18px; line-height: 1.75; }
.us-prose ul { list-style: disc; padding-left: 24px; color: var(--us-muted); margin-bottom: 18px; }
.us-prose ul li { margin-bottom: 8px; line-height: 1.7; }
.us-prose strong { color: var(--us-text-dim); }
.us-prose a { color: var(--us-indigo-300); }
.us-prose code { background: var(--us-bg-card); border: 1px solid var(--us-border); border-radius: 4px; padding: 2px 7px; font-family: var(--us-font-mono); font-size: .85em; color: var(--us-cyan-300); }

/* ── Compare Table ── */
.us-compare-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.us-compare-table th { padding: 14px 16px; text-align: left; background: var(--us-bg-card2); color: var(--us-text-dim); font-weight: 700; border-bottom: 2px solid var(--us-indigo-700); }
.us-compare-table td { padding: 12px 16px; border-bottom: 1px solid var(--us-border); color: var(--us-muted); }
.us-compare-table tr:last-child td { border-bottom: none; }
.us-compare-table .winner { color: var(--us-indigo-300); font-weight: 600; }
.us-compare-table td:first-child { font-weight: 600; color: var(--us-text-dim); }

/* ── Page Hero ── */
.us-page-hero {
  padding-block: 64px 48px; text-align: center;
  border-bottom: 1px solid var(--us-border);
  background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(91,92,246,.07) 0%, transparent 70%);
}
.us-page-hero h1 { margin-bottom: 14px; }
.us-page-hero p { max-width: 560px; margin-inline: auto; }

/* ── 404 ── */
.us-404-wrap { min-height: 70vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 40px 24px; }
.us-404-code { font-size: 6rem; font-weight: 800; color: var(--us-indigo-500); line-height: 1; letter-spacing: -0.04em; }

/* ── Footer ── */
.us-footer {
  background: var(--us-dark-950);
  border-top: 1px solid var(--us-border);
  padding-top: 64px; padding-bottom: 32px;
}
.us-footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; padding-bottom: 40px;
  border-bottom: 1px solid var(--us-border); margin-bottom: 28px;
}
.us-footer-brand p { font-size: .88rem; color: var(--us-muted); line-height: 1.6; max-width: 280px; }
.us-footer-col h4 { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--us-muted); margin-bottom: 14px; }
.us-footer-col ul li { margin-bottom: 8px; }
.us-footer-col ul li a { font-size: .88rem; color: var(--us-dark-200); transition: color var(--us-transition); }
.us-footer-col ul li a:hover { color: var(--us-indigo-300); text-decoration: none; }
.us-footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.us-footer-copy { font-size: .82rem; color: var(--us-dark-300); }
.us-footer-links { display: flex; gap: 20px; }
.us-footer-links a { font-size: .82rem; color: var(--us-dark-300); }
.us-footer-links a:hover { color: var(--us-indigo-300); text-decoration: none; }

/* ── Ad Popup ── */
.us-ad-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,.65);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
  backdrop-filter: blur(4px);
}
.us-ad-overlay.visible {
  opacity: 1; pointer-events: all;
}
.us-ad-card {
  position: relative;
  background: var(--us-bg-card);
  border: 1px solid var(--us-border);
  border-radius: 20px;
  padding: 36px 40px;
  max-width: 480px; width: 100%;
  text-align: center;
  box-shadow: 0 24px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(91,92,246,.2);
  transform: scale(.95) translateY(12px);
  transition: transform .28s cubic-bezier(.34,1.56,.64,1);
}
.us-ad-overlay.visible .us-ad-card {
  transform: scale(1) translateY(0);
}
.us-ad-close {
  position: absolute; top: 14px; right: 16px;
  background: none; border: none; cursor: pointer;
  color: var(--us-muted); font-size: 1.3rem; line-height: 1;
  padding: 4px 8px; border-radius: 6px;
  transition: color .15s, background .15s;
}
.us-ad-close:hover { color: var(--us-text); background: rgba(255,255,255,.06); }
.us-ad-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(91,92,246,.12); border: 1px solid rgba(91,92,246,.3);
  color: var(--us-indigo-300); border-radius: 100px;
  font-size: .72rem; font-weight: 700; letter-spacing: .06em;
  padding: 4px 12px; margin-bottom: 18px; text-transform: uppercase;
}
.us-ad-logo {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin-bottom: 16px;
}
.us-ad-logo-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, #5b5cf6, #8b5cf6);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.us-ad-logo-text {
  font-size: 1.3rem; font-weight: 800; color: var(--us-text);
}
.us-ad-logo-text span { color: var(--us-indigo-300); }
.us-ad-headline {
  font-size: 1.25rem; font-weight: 700; color: var(--us-text);
  line-height: 1.35; margin-bottom: 10px;
}
.us-ad-sub {
  font-size: .88rem; color: var(--us-muted); line-height: 1.55;
  margin-bottom: 24px;
}
.us-ad-features {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-bottom: 24px;
}
.us-ad-feat {
  background: rgba(255,255,255,.05); border: 1px solid var(--us-border);
  border-radius: 8px; padding: 5px 12px;
  font-size: .75rem; color: var(--us-muted);
}
.us-ad-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, #5b5cf6, #7c3aed);
  color: #fff; font-size: .95rem; font-weight: 700;
  padding: 13px 28px; border-radius: 12px; text-decoration: none;
  transition: opacity .15s, transform .15s;
  box-shadow: 0 4px 20px rgba(91,92,246,.4);
}
.us-ad-cta:hover { opacity: .9; transform: translateY(-1px); text-decoration: none; color: #fff; }
.us-ad-note {
  margin-top: 14px; font-size: .75rem; color: var(--us-dark-300);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .us-footer-grid { grid-template-columns: 1fr 1fr; }
  .us-tool-wrap   { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .us-nav { display: none; }
  .us-hamburger { display: flex; }
  .us-grid-3, .us-grid-4 { grid-template-columns: 1fr 1fr; }
  .us-grid-2 { grid-template-columns: 1fr; }
  .us-footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .us-hero-cta-row { flex-direction: column; align-items: center; }
}
@media (max-width: 520px) {
  .us-grid-3, .us-grid-4 { grid-template-columns: 1fr; }
  .us-scale-btns { flex-wrap: wrap; }
}