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

:root {
  --bg:         #050507;
  --surface:    rgba(255,255,255,0.04);
  --surface-2:  rgba(255,255,255,0.07);
  --border:     rgba(255,255,255,0.09);
  --border-2:   rgba(255,255,255,0.14);
  --text:       #f0f0f5;
  --text-muted: rgba(240,240,245,0.45);
  --accent-1:   #ff2d55;
  --accent-2:   #ff6b35;
  --accent-3:   #a78bfa;
  --accent-blue:#38bdf8;
  --grad:       linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --grad-purple:linear-gradient(135deg, var(--accent-3), var(--accent-blue));
  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;
  --shadow-glow:0 0 40px rgba(255,45,85,0.18), 0 0 80px rgba(255,107,53,0.08);
  --font-body:  'Inter', sans-serif;
  --font-head:  'Space Grotesk', sans-serif;
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Aurora Blobs ──────────────────────────────────────────────────────── */
.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: floatBlob 20s ease-in-out infinite alternate;
}

.aurora__blob--1 {
  width: 700px; height: 700px;
  top: -200px; left: -150px;
  background: radial-gradient(circle, #ff2d55 0%, transparent 70%);
  animation-duration: 18s;
}

.aurora__blob--2 {
  width: 600px; height: 600px;
  top: 30%; right: -200px;
  background: radial-gradient(circle, #a78bfa 0%, transparent 70%);
  animation-duration: 22s;
  animation-delay: -5s;
}

.aurora__blob--3 {
  width: 500px; height: 500px;
  bottom: -100px; left: 30%;
  background: radial-gradient(circle, #38bdf8 0%, transparent 70%);
  animation-duration: 25s;
  animation-delay: -10s;
}

@keyframes floatBlob {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(60px, -40px) scale(1.1); }
  66%  { transform: translate(-40px, 60px) scale(0.95); }
  100% { transform: translate(40px, 20px) scale(1.05); }
}

/* ─── Noise overlay ─────────────────────────────────────────────────────── */
.noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px;
}

/* ─── Header ────────────────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 24px;
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  background: rgba(5,5,7,0.7);
}

.header__inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.logo__icon { width: 32px; height: 32px; }

.logo__text {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav__link:hover { color: var(--text); }

.nav__badge {
  background: var(--grad);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.06em;
}

/* ─── Main content ──────────────────────────────────────────────────────── */
.main {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ─── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 80px 0 56px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 28px;
  backdrop-filter: blur(12px);
}

.tag__dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 8px #4ade80;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.85); }
}

.hero__title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero__title--grad {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 500px;
  margin: 0 auto 40px;
}

/* ─── Card ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(160%);
  transition: border-color var(--transition);
}
.card:hover { border-color: var(--border-2); }

/* ─── Input card ────────────────────────────────────────────────────────── */
.input-card {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-glow);
}

.input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-wrap:focus-within {
  border-color: rgba(255,45,85,0.6);
  box-shadow: 0 0 0 3px rgba(255,45,85,0.12);
}

.input-wrap__icon {
  width: 18px; height: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.url-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 16px 0;
  min-width: 0;
}
.url-input::placeholder { color: var(--text-muted); }

.clear-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: 4px;
  line-height: 0;
  transition: color var(--transition);
}
.clear-btn:hover { color: var(--text); }
.clear-btn svg { width: 16px; height: 16px; }
.clear-btn.visible { display: flex; }

.fetch-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 14px 24px;
  background: var(--grad);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.fetch-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 100%);
  pointer-events: none;
}

.fetch-btn:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 8px 32px rgba(255,45,85,0.35); }
.fetch-btn:active { transform: translateY(0); }
.fetch-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.fetch-btn__icon { width: 18px; height: 18px; }

.fetch-btn.loading .fetch-btn__text::after {
  content: '';
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 10px;
  vertical-align: middle;
}
.fetch-btn.loading .fetch-btn__icon { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

.paste-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 14px;
}
.paste-hint svg { width: 14px; height: 14px; }
.paste-hint kbd {
  display: inline-block;
  padding: 1px 7px;
  border: 1px solid var(--border-2);
  border-radius: 5px;
  font-size: 0.75rem;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--surface-2);
}

/* ─── Loading state ─────────────────────────────────────────────────────── */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 60px 0;
}

.loader {
  position: relative;
  width: 60px; height: 60px;
}

.loader__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  animation: spinRing 1.2s cubic-bezier(0.5,0,0.5,1) infinite;
}

.loader__ring:nth-child(1) {
  border-top-color: var(--accent-1);
  animation-delay: -0.45s;
}
.loader__ring--2 {
  inset: 8px;
  border-top-color: var(--accent-2);
  animation-delay: -0.3s;
}
.loader__ring--3 {
  inset: 16px;
  border-top-color: var(--accent-3);
  animation-delay: -0.15s;
}

@keyframes spinRing { to { transform: rotate(360deg); } }

.loading-state__text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ─── Error state ───────────────────────────────────────────────────────── */
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 0;
}

.error-icon svg {
  width: 48px; height: 48px;
  color: var(--accent-1);
}

.error-msg {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
}

.retry-btn {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 10px 24px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.retry-btn:hover { background: var(--surface); border-color: var(--accent-1); }

/* ─── Result card ───────────────────────────────────────────────────────── */
.result-section { margin: 0 0 48px; }

.result-card { overflow: hidden; }

.video-preview {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}

.video-thumb-wrap {
  position: relative;
  width: 120px;
  height: 210px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface-2);
}

.video-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-thumb__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 8px;
}

.thumb-duration {
  font-size: 0.72rem;
  font-weight: 600;
  color: #fff;
  background: rgba(0,0,0,0.5);
  border-radius: 4px;
  padding: 2px 6px;
}

.video-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.video-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.video-author__avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface-2);
  border: 2px solid var(--border-2);
}

.video-author__name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.video-author__tag {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.video-title {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.stat {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.stat svg { width: 14px; height: 14px; }

.music-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.music-chip svg { width: 14px; height: 14px; flex-shrink: 0; color: var(--accent-3); }
.music-chip span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ─── Download section ──────────────────────────────────────────────────── */
.download-section { padding: 24px; }

.download-section__title {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.dl-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.dl-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--btn-grad, var(--grad));
  opacity: 0;
  transition: opacity var(--transition);
}
.dl-btn:hover::after { opacity: 0.08; }
.dl-btn:hover { border-color: var(--btn-color, var(--accent-1)); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.dl-btn:active { transform: translateY(0); }

.dl-btn__icon-wrap {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--btn-bg, rgba(255,45,85,0.15));
}
.dl-btn__icon-wrap svg { width: 18px; height: 18px; color: var(--btn-color, var(--accent-1)); }

.dl-btn__info { flex: 1; min-width: 0; }
.dl-btn__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  display: block;
}
.dl-btn__sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

.dl-btn__arrow {
  width: 16px; height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.dl-btn:hover .dl-btn__arrow { transform: translateY(2px); color: var(--btn-color, var(--accent-1)); }

/* HD variant */
.dl-btn--hd   { --btn-color: var(--accent-1); --btn-bg: rgba(255,45,85,0.12); --btn-grad: var(--grad); }
/* SD variant */
.dl-btn--sd   { --btn-color: #fb923c; --btn-bg: rgba(251,146,60,0.12); --btn-grad: linear-gradient(135deg, #fb923c, #fbbf24); }
/* Audio variant */
.dl-btn--audio { --btn-color: var(--accent-3); --btn-bg: rgba(167,139,250,0.12); --btn-grad: linear-gradient(135deg, #a78bfa, #38bdf8); }
/* WM variant */
.dl-btn--wm   { --btn-color: #64748b; --btn-bg: rgba(100,116,139,0.12); --btn-grad: linear-gradient(135deg, #64748b, #94a3b8); }

/* ─── Section title ─────────────────────────────────────────────────────── */
.section-title {
  font-family: var(--font-head);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 40px;
  color: var(--text);
}

/* ─── How it works ──────────────────────────────────────────────────────── */
.how-section { padding: 64px 0; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.step:hover { border-color: var(--border-2); transform: translateY(-4px); }

.step__num {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 2rem;
  font-weight: 800;
  color: rgba(255,255,255,0.04);
  font-family: var(--font-head);
  line-height: 1;
}

.step__icon {
  width: 52px; height: 52px;
  margin: 0 auto 16px;
  background: var(--grad);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step__icon svg { width: 22px; height: 22px; color: #fff; }

.step h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ─── FAQ ───────────────────────────────────────────────────────────────── */
.faq-section { padding: 64px 0; }

.faq-list { display: flex; flex-direction: column; gap: 10px; }

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item[open] { border-color: var(--border-2); }

.faq-item summary {
  padding: 18px 20px;
  cursor: pointer;
  font-size: 0.925rem;
  font-weight: 500;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); color: var(--accent-1); }

.faq-item p {
  padding: 0 20px 18px;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── Footer ────────────────────────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ─── Hidden util ───────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Toast ─────────────────────────────────────────────────────────────── */
.toast-wrap {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 0.875rem;
  color: var(--text);
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  animation: slideUp 0.3s ease forwards;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 320px;
}
.toast--success { border-color: rgba(74,222,128,0.4); }
.toast--success .toast__dot { background: #4ade80; }
.toast--error   { border-color: rgba(255,45,85,0.4); }
.toast--error .toast__dot   { background: var(--accent-1); }

.toast__dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .nav__link { display: none; }
  .video-preview { grid-template-columns: 1fr; }
  .video-thumb-wrap { width: 100%; height: 200px; }
  .steps { grid-template-columns: 1fr; }
  .toast-wrap { right: 16px; bottom: 16px; left: 16px; }
  .toast { max-width: 100%; }
  .hero { padding: 48px 0 40px; }
  .hero__title { font-size: 2rem; }
}