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

:root {
  --bg: #07070f;
  --bg2: #0d0d1a;
  --glass: rgba(255,255,255,0.045);
  --glass-border: rgba(255,255,255,0.09);
  --glass-inner: rgba(255,255,255,0.03);
  --purple: #8b5cf6;
  --cyan: #06b6d4;
  --grad: linear-gradient(135deg, var(--purple), var(--cyan));
  --grad-glow: linear-gradient(135deg, #8b5cf680, #06b6d480);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #475569;
  --red: #f87171;
  --green: #34d399;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow: 0 24px 80px rgba(0,0,0,0.6);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Body & background ─────────────────────────────────────────────────────── */
html, body {
  min-height: 100%;
  font-family: 'Outfit', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1rem;
}

/* Animated gradient blobs */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.18;
  pointer-events: none;
  animation: blobFloat 12s ease-in-out infinite alternate;
}
.blob-1 { width: 500px; height: 500px; background: var(--purple); top: -150px; left: -150px; animation-delay: 0s; }
.blob-2 { width: 400px; height: 400px; background: var(--cyan); bottom: -100px; right: -100px; animation-delay: -4s; }
.blob-3 { width: 300px; height: 300px; background: #ec4899; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -8s; opacity: 0.08; }

@keyframes blobFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 20px) scale(1.08); }
}

/* ─── App wrapper ───────────────────────────────────────────────────────────── */
.app-wrapper {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

/* ─── Header ────────────────────────────────────────────────────────────────── */
.header { text-align: center; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.logo-icon { width: 40px; height: 40px; flex-shrink: 0; }

.logo-text {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}

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

.header-tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 400;
}

/* ─── Glass card ────────────────────────────────────────────────────────────── */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.06);
}

.glass-inner {
  background: var(--glass-inner);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

/* ─── Main card ─────────────────────────────────────────────────────────────── */
.main-card {
  width: 100%;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ─── Input section ─────────────────────────────────────────────────────────── */
.input-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.input-row {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.input-wrapper {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 1rem;
  width: 18px;
  height: 18px;
  color: var(--text-dim);
  pointer-events: none;
  flex-shrink: 0;
}

.url-input {
  width: 100%;
  padding: 0.85rem 2.75rem 0.85rem 2.75rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.url-input::placeholder { color: var(--text-dim); }

.url-input:focus {
  border-color: var(--purple);
  background: rgba(139,92,246,0.08);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.15), 0 0 20px rgba(139,92,246,0.1);
}

.clear-btn {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  padding: 4px;
  border-radius: 4px;
  transition: color var(--transition);
}
.clear-btn svg { width: 16px; height: 16px; }
.clear-btn:hover { color: var(--text); }

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  background: var(--grad);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(139,92,246,0.35);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(139,92,246,0.5);
}

.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-icon { width: 18px; height: 18px; flex-shrink: 0; }

/* Loading state */
.btn-primary.loading .btn-text::after {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 0.5rem;
  vertical-align: middle;
}

/* ─── Error message ─────────────────────────────────────────────────────────── */
.error-msg {
  margin-top: 0.75rem;
  padding: 0.6rem 0.9rem;
  background: rgba(248,113,113,0.12);
  border: 1px solid rgba(248,113,113,0.3);
  border-radius: var(--radius-sm);
  color: var(--red);
  font-size: 0.88rem;
  animation: fadeIn 0.2s ease;
}

/* ─── Video section ─────────────────────────────────────────────────────────── */
.video-section {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  animation: slideUp 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.video-info {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.thumbnail {
  width: 120px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: 1px solid var(--glass-border);
}

.video-meta { flex: 1; min-width: 0; }

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 0.5rem;
}

.video-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  white-space: nowrap;
}

/* ─── Format tabs ───────────────────────────────────────────────────────────── */
.format-section { display: flex; flex-direction: column; gap: 0.75rem; }

.format-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(0,0,0,0.25);
  border-radius: var(--radius-sm);
  padding: 4px;
  width: fit-content;
}

.format-tab {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.25rem;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.format-tab svg { width: 15px; height: 15px; }

.format-tab.active {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 2px 12px rgba(139,92,246,0.4);
}

.format-tab:not(.active):hover { color: var(--text); background: rgba(255,255,255,0.06); }

/* ─── Quality options ───────────────────────────────────────────────────────── */
.quality-options {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.quality-label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }

.quality-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(6,182,212,0.1);
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 600;
}
.quality-badge svg { width: 14px; height: 14px; }

.quality-pills { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.quality-pill {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.quality-pill:hover { border-color: var(--purple); color: var(--text); background: rgba(139,92,246,0.08); }

.quality-pill.selected {
  background: rgba(139,92,246,0.18);
  border-color: var(--purple);
  color: var(--purple);
  box-shadow: 0 0 10px rgba(139,92,246,0.2);
}

/* ─── Download button (full width) ─────────────────────────────────────────── */
.download-btn { width: 100%; padding: 1rem; font-size: 1rem; border-radius: var(--radius-md); }

/* ─── Progress section ──────────────────────────────────────────────────────── */
.progress-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  animation: fadeIn 0.3s ease;
}

.progress-icon { position: relative; width: 64px; height: 64px; }

.spinner {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.06);
  border-top-color: var(--purple);
  border-right-color: var(--cyan);
  animation: spin 1s linear infinite;
}

.progress-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.progress-bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--grad);
  border-radius: 999px;
  transition: width 0.4s ease;
  box-shadow: 0 0 10px rgba(139,92,246,0.6);
}

.progress-pct {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Success section ───────────────────────────────────────────────────────── */
.success-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0;
  animation: successPop 0.5s cubic-bezier(0.34,1.56,0.64,1);
}

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(52,211,153,0.12);
  border: 2px solid rgba(52,211,153,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--green);
}

.success-title { font-size: 1.5rem; font-weight: 700; }

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

.dl-link {
  margin-top: 0.25rem;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-md);
}

.reset-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.reset-btn:hover { color: var(--text-muted); background: rgba(255,255,255,0.04); }

/* ─── Footer ────────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.78rem;
}

/* ─── Animations ────────────────────────────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

@keyframes successPop {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 520px) {
  .main-card { padding: 1.25rem; }
  .input-row { flex-direction: column; }
  .analyze-btn { width: 100%; }
  .thumbnail { width: 90px; height: 54px; }
}