/* ==========================================================
   Video Downloader — global styles
   - Vanilla CSS (no framework).
   - CSS custom properties drive the theme so the admin
     can change colours without touching any CSS file.
   ========================================================== */

:root {
  /* palette — overwritten at runtime from /api/settings */
  --primary: #7C3AED;
  --primary-600: #6D28D9;
  --primary-500: #8B5CF6;
  --accent:  #06B6D4;
  --accent-600: #0891B2;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-card: #ffffff;
  --bg-overlay: rgba(255,255,255,0.85);
  --text: #0f172a;
  --text-soft: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.05);
  --shadow:    0 8px 24px rgba(15,23,42,.06);
  --shadow-lg: 0 20px 60px rgba(15,23,42,.10);
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --transition: 200ms cubic-bezier(.2,.8,.2,1);
  --max-width: 1180px;
  --header-h:  72px;
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

[data-theme="dark"] {
  --primary: #8B5CF6;
  --primary-600: #A78BFA;
  --primary-500: #B197FC;
  --accent:  #22D3EE;
  --accent-600: #06B6D4;
  --bg: #0b1020;
  --bg-soft: #0f1530;
  --bg-card: #131a36;
  --bg-overlay: rgba(11,16,32,0.85);
  --text: #f1f5f9;
  --text-soft: #cbd5e1;
  --text-muted: #94a3b8;
  --border: #1f2a4d;
  --border-strong: #2c3a66;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow:    0 8px 24px rgba(0,0,0,.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.5);
}

/* ----- Base ----- */
* { box-sizing: border-box; }
*,*::before,*::after { transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition); }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  min-height: 100%;
}
body { overflow-x: hidden; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ----- Layout ----- */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section   { padding: 80px 0; }
@media (max-width: 720px) { .section { padding: 56px 0; } }

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg-overlay);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header .row {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  font-size: 18px;
}
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--text-soft); font-weight: 500; }
.nav a:hover { color: var(--text); text-decoration: none; }
.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  display: grid; place-items: center;
  font-size: 16px;
}
.theme-toggle:hover { border-color: var(--primary); }

@media (max-width: 720px) {
  .nav .desktop { display: none; }
}

/* ----- Hero ----- */
.hero { position: relative; padding: 88px 0 64px; text-align: center; }
.hero h1 {
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -.04em;
  margin: 0 0 18px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.05;
}
.hero p.lead {
  margin: 0 auto 36px;
  max-width: 640px;
  color: var(--text-soft);
  font-size: clamp(16px, 1.6vw, 19px);
}

/* ----- Glow background ----- */
.glow {
  position: absolute;
  pointer-events: none;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .35;
  z-index: 0;
}
.glow.one { top: -200px; left:  -150px; background: var(--primary); }
.glow.two { top:  -50px; right: -200px; background: var(--accent); }

/* ----- URL input ----- */
.url-card {
  position: relative;
  z-index: 1;
  margin: 0 auto;
  max-width: 760px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-xl);
  padding: 16px;
}
.url-form {
  display: flex;
  align-items: center;
  gap: 10px;
}
.url-form .platform-chip {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.url-form input {
  flex: 1;
  min-width: 0;
  height: 52px;
  border-radius: 12px;
  border: none;
  background: transparent;
  outline: none;
  color: var(--text);
  font-size: 16px;
  padding: 0 6px;
}
.url-form input::placeholder { color: var(--text-muted); }
.btn {
  height: 52px;
  padding: 0 28px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 22px rgba(124,58,237,.35);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(124,58,237,.45); }
.btn:active { transform: translateY(0); }
.btn[disabled] { opacity: .55; cursor: progress; transform: none; box-shadow: none; }
.btn-ghost { background: var(--bg-soft); color: var(--text); box-shadow: none; border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); border-color: var(--border-strong); transform: none; }
.btn-block { width: 100%; }
.btn-sm { height: 40px; padding: 0 18px; font-size: 13px; border-radius: 10px; }

.url-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 13px;
  flex-wrap: wrap;
}
.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-soft);
  font-weight: 600;
}

@media (max-width: 640px) {
  .url-form { flex-wrap: wrap; }
  .url-form .platform-chip { display: none; }
  .url-form input { width: 100%; }
  .btn { width: 100%; }
}

/* ----- Progress ----- */
.progress {
  margin-top: 28px;
  display: none;
  text-align: center;
}
.progress.show { display: block; }
.progress .bar {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: var(--bg-soft);
  overflow: hidden;
  margin-bottom: 10px;
}
.progress .bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient);
  width: 30%;
  border-radius: inherit;
  animation: indeterminate 1.4s ease-in-out infinite;
}
@keyframes indeterminate {
  0%   { transform: translateX(-100%); }
  50%  { transform: translateX(60%);  width: 60%; }
  100% { transform: translateX(330%); width: 30%; }
}
.progress small { color: var(--text-muted); }

/* ----- Result / Quality picker ----- */
.result {
  display: none;
  margin: 48px auto 0;
  max-width: 880px;
}
.result.show { display: block; animation: pop .35s var(--transition) both; }
@keyframes pop {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.result-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
}
@media (max-width: 720px) {
  .result-card { grid-template-columns: 1fr; }
}

.thumb {
  position: relative;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb .badge {
  position: absolute;
  left: 10px; bottom: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15,23,42,.75);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.meta h3 {
  margin: 0 0 6px;
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: -.01em;
  line-height: 1.3;
}
.meta .author { color: var(--text-soft); font-size: 14px; margin-bottom: 12px; }
.meta .author b { color: var(--text); }

.qualities { display: grid; gap: 10px; margin-top: 14px; }
.quality {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-soft);
  transition: border-color var(--transition), transform var(--transition);
}
.quality:hover { border-color: var(--primary); transform: translateY(-1px); }
.quality .label { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.quality .meta-info { color: var(--text-muted); font-size: 13px; }

/* ----- Error ----- */
.alert {
  margin: 28px auto 0;
  max-width: 760px;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: none;
  gap: 12px;
  align-items: flex-start;
}
.alert.show { display: flex; }
.alert.error  { background: rgba(239,68,68,.08);  border-color: rgba(239,68,68,.45);  color: #b91c1c; }
.alert.info   { background: rgba(124,58,237,.08); border-color: rgba(124,58,237,.45);  color: var(--primary); }
.alert.success{ background: rgba(16,185,129,.08); border-color: rgba(16,185,129,.45);  color: #047857; }

[data-theme="dark"] .alert.error { color: #fca5a5; }
[data-theme="dark"] .alert.success{ color: #6ee7b7; }

.alert .icon { flex: 0 0 auto; font-size: 20px; line-height: 1; padding-top: 2px; }
.alert .msg  { font-size: 14px; }

/* ----- Features ----- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 880px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }
.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), border-color var(--transition);
}
.feature:hover { transform: translateY(-2px); border-color: var(--primary); }
.feature .ic {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 22px;
  margin-bottom: 14px;
  background: var(--bg-soft);
}
.feature h4 { margin: 0 0 6px; font-size: 17px; }
.feature p { color: var(--text-soft); font-size: 14px; margin: 0; }

/* ----- How it works ----- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
@media (max-width: 880px) { .steps { grid-template-columns: 1fr; } }
.step { counter-increment: step; position: relative; padding: 22px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.step::before {
  content: counter(step);
  position: absolute;
  top: -16px; left: 22px;
  width: 36px; height: 36px;
  background: var(--gradient);
  color: #fff;
  display: grid; place-items: center;
  border-radius: 12px;
  font-weight: 800;
}
.step h4 { margin: 12px 0 6px; }
.step p  { color: var(--text-soft); font-size: 14px; margin: 0; }

/* ----- FAQ ----- */
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  list-style: none;
  display: flex; align-items: center; justify-content: space-between;
}
.faq summary::after { content: '+'; font-size: 22px; color: var(--text-muted); transition: transform var(--transition); }
.faq details[open] summary::after { content: '−'; transform: rotate(180deg); }
.faq p { color: var(--text-soft); margin: 12px 0 0; font-size: 14px; }

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 40px 0 28px;
  margin-top: 60px;
}
.footer-row {
  display: flex; flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  color: var(--text-soft);
  font-size: 14px;
}
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: var(--text-soft); }

/* ----- Static / legal pages ----- */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px;
}
.prose h1 { letter-spacing: -.03em; }
.prose h2 { margin-top: 36px; }
.prose p, .prose li { color: var(--text-soft); }
.prose ul { padding-left: 22px; }
.prose code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 13px;
}

/* ----- Admin ----- */
.admin-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - var(--header-h));
}
@media (max-width: 880px) { .admin-shell { grid-template-columns: 1fr; } }
.admin-side {
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  padding: 24px;
}
.admin-side h5 { color: var(--text-muted); font-size: 11px; text-transform: uppercase; letter-spacing: .12em; margin: 0 0 12px; }
.admin-side a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-soft);
  font-weight: 600;
  margin-bottom: 6px;
}
.admin-side a:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.admin-main { padding: 32px; }
.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.admin-card h3 { margin: 0 0 6px; }
.admin-card p  { color: var(--text-soft); margin: 0 0 18px; font-size: 14px; }
.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 600px) { .admin-grid { grid-template-columns: 1fr; } }
.form-row { display: grid; gap: 6px; }
.form-row label { font-weight: 600; font-size: 13px; color: var(--text-soft); }
.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=password],
.form-row textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  outline: none;
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--primary); }
.form-row .color-row {
  display: flex; align-items: center; gap: 10px;
}
.form-row input[type=color] {
  width: 44px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  cursor: pointer;
}
.toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}
.toggle:last-child { border-bottom: 0; }
.toggle label { font-weight: 600; }
.toggle input { width: 42px; height: 24px; appearance: none; background: var(--border-strong); border-radius: 999px; position: relative; cursor: pointer; transition: background var(--transition); }
.toggle input:checked { background: var(--primary); }
.toggle input::after {
  content: '';
  position: absolute; top: 3px; left: 3px;
  width: 18px; height: 18px;
  border-radius: 50%; background: #fff;
  transition: transform var(--transition);
}
.toggle input:checked::after { transform: translateX(18px); }

.toast {
  position: fixed;
  bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }

/* ----- Login ----- */
.login-wrap {
  display: grid; place-items: center;
  min-height: calc(100vh - var(--header-h));
  padding: 32px 24px;
}
.login-card {
  width: 100%; max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 6px; font-size: 22px; }
.login-card p  { margin: 0 0 22px; color: var(--text-soft); font-size: 14px; }