/* ===========================
   ANISU — Dark Glassmorphism
   Purple / Cyan Neon Theme
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
  --bg:          #0a0a0f;
  --bg-2:        #0f0f18;
  --glass:       rgba(255, 255, 255, 0.04);
  --glass-hover: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.10);
  --purple:      #8b5cf6;
  --purple-dim:  rgba(139, 92, 246, 0.15);
  --cyan:        #06b6d4;
  --cyan-dim:    rgba(6, 182, 212, 0.15);
  --white:       #ffffff;
  --gray-1:      #e2e8f0;
  --gray-2:      #94a3b8;
  --gray-3:      #475569;
  --gray-4:      #1e293b;
  --red-yt:      #ff0000;
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --shadow-glow-purple: 0 0 40px rgba(139, 92, 246, 0.25);
  --shadow-glow-cyan:   0 0 40px rgba(6, 182, 212, 0.2);
  --transition:  0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--purple-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--purple); }

/* ── Animated Background Blobs ── */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: blobFloat 10s ease-in-out infinite alternate;
}
.blob-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #8b5cf6, transparent 70%);
  top: -150px; left: -150px;
  animation-duration: 12s;
}
.blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #06b6d4, transparent 70%);
  top: 30%; right: -100px;
  animation-duration: 15s;
  animation-delay: -5s;
}
.blob-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #7c3aed, transparent 70%);
  bottom: -100px; left: 30%;
  animation-duration: 18s;
  animation-delay: -8s;
}
@keyframes blobFloat {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(30px, -30px) scale(1.05); }
  100% { transform: translate(-20px, 20px) scale(0.97); }
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(10, 10, 15, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition);
}
.nav-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon { width: 26px; height: 26px; flex-shrink: 0; }
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}
.nav-link {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-2);
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--white); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-mobile-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--gray-2);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 1.5rem 60px;
  position: relative;
  z-index: 1;
}
.hero-content {
  width: 100%;
  max-width: 680px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-1);
  backdrop-filter: blur(10px);
  animation: fadeInDown 0.6s ease both;
}

/* Hero Title */
.hero-title {
  font-size: clamp(2.2rem, 6vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--white);
  animation: fadeInUp 0.7s ease 0.1s both;
}
.gradient-text {
  background: linear-gradient(135deg, var(--purple) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--gray-2);
  max-width: 480px;
  animation: fadeInUp 0.7s ease 0.2s both;
}

/* ── Main Card ── */
.main-card {
  width: 100%;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 8px 60px rgba(0, 0, 0, 0.4), var(--shadow-glow-purple);
  animation: fadeInUp 0.8s ease 0.3s both;
  transition: box-shadow var(--transition);
}
.main-card:hover {
  box-shadow: 0 12px 80px rgba(0, 0, 0, 0.5), var(--shadow-glow-purple), var(--shadow-glow-cyan);
}

/* ── Input Section ── */
.input-section { display: flex; flex-direction: column; gap: 0.75rem; }
.input-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-2);
}
.input-row { display: flex; gap: 0.75rem; align-items: stretch; }
.input-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 0 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input-wrapper:focus-within {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}
.yt-icon { width: 24px; height: 24px; flex-shrink: 0; border-radius: 5px; }
.url-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 14px 0;
  min-width: 0;
}
.url-input::placeholder { color: var(--gray-3); }
.paste-btn {
  background: none;
  border: none;
  color: var(--gray-3);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  display: flex;
  align-items: center;
}
.paste-btn:hover { color: var(--purple); background: var(--purple-dim); }

.fetch-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 1.5rem;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  border: none;
  border-radius: var(--radius-md);
  color: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
  min-height: 50px;
}
.fetch-btn:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 8px 30px rgba(139, 92, 246, 0.5); }
.fetch-btn:active { transform: translateY(0); }
.fetch-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.input-hint {
  font-size: 0.8rem;
  min-height: 1.2em;
  transition: color var(--transition);
}
.input-hint.error { color: #f87171; }
.input-hint.info  { color: var(--cyan); }

/* ── Divider ── */
.card-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 1.5rem 0;
}

/* ── Video Preview ── */
.preview-section { display: flex; flex-direction: column; gap: 1.25rem; }

.video-info-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1rem;
}
.thumbnail-wrapper { position: relative; flex-shrink: 0; }
.video-thumbnail {
  width: 130px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  display: block;
}
.duration-badge {
  position: absolute;
  bottom: 5px; right: 5px;
  background: rgba(0,0,0,0.8);
  color: white;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-details { display: flex; flex-wrap: wrap; gap: 12px; }
.channel-name, .view-count {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--gray-2);
}

/* ── Pill Groups ── */
.selector-group { display: flex; flex-direction: column; gap: 0.6rem; }
.selector-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-2);
}
.pill-group { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pill {
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.04);
  color: var(--gray-2);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.pill:hover { border-color: var(--purple); color: var(--purple); background: var(--purple-dim); }
.pill.active {
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  border-color: transparent;
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

.filesize-hint {
  font-size: 0.8rem;
  color: var(--gray-3);
  min-height: 1.2em;
  text-align: right;
}

/* ── Download Button ── */
.download-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 6px 30px rgba(139, 92, 246, 0.45);
}
.download-btn:hover { opacity: 0.92; transform: translateY(-2px); box-shadow: 0 10px 40px rgba(139, 92, 246, 0.55); }
.download-btn:active { transform: translateY(0); }
.download-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.download-icon { flex-shrink: 0; }
.download-progress {
  position: absolute;
  bottom: 0; left: 0;
  height: 3px;
  background: rgba(255,255,255,0.5);
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.status-msg {
  text-align: center;
  font-size: 0.85rem;
  min-height: 1.2em;
  color: var(--cyan);
}
.status-msg.error { color: #f87171; }

.new-download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px;
  background: none;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--gray-2);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.new-download-btn:hover { border-color: var(--purple); color: var(--purple); background: var(--purple-dim); }

/* ── Features Section ── */
.features-section {
  position: relative;
  z-index: 1;
  padding: 5rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  backdrop-filter: blur(20px);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.15);
}
.feature-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: var(--purple-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--purple);
  margin-bottom: 1rem;
  transition: background var(--transition);
}
.feature-card:hover .feature-icon { background: rgba(139, 92, 246, 0.25); }
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--white);
}
.feature-card p { font-size: 0.875rem; color: var(--gray-2); line-height: 1.6; }

/* ── How It Works ── */
.how-section {
  position: relative;
  z-index: 1;
  padding: 5rem 1.5rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}
.section-subtitle { color: var(--gray-2); font-size: 1rem; margin-bottom: 3rem; }

.steps-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.step {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  backdrop-filter: blur(16px);
  max-width: 220px;
  transition: transform var(--transition), border-color var(--transition);
}
.step:hover { transform: translateY(-4px); border-color: rgba(6, 182, 212, 0.3); }
.step-number {
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
  letter-spacing: -0.05em;
}
.step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.step p { font-size: 0.85rem; color: var(--gray-2); }
.step-arrow {
  font-size: 1.5rem;
  color: var(--gray-3);
  flex-shrink: 0;
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--glass-border);
  padding: 3rem 1.5rem;
  text-align: center;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-tagline { color: var(--gray-2); font-size: 0.9rem; }
.footer-disclaimer { color: var(--gray-3); font-size: 0.78rem; max-width: 500px; }
.footer-copy { color: var(--gray-3); font-size: 0.75rem; }

/* ── Animations ── */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .navbar { padding: 0 1rem; }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }

  .hero { padding: 90px 1rem 50px; }
  .main-card { padding: 1.25rem; border-radius: var(--radius-lg); }

  .input-row { flex-direction: column; }
  .fetch-btn { width: 100%; padding: 14px; }

  .video-info-card { flex-direction: column; }
  .video-thumbnail { width: 100%; height: 180px; }

  .steps-row { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .step { max-width: 100%; width: 100%; }
}