/* =====================================================
   VideoForge — style.css
   Dark glassmorphism theme with neon purple/cyan accents
   ===================================================== */

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

:root {
  --bg:           #07080f;
  --bg-2:         #0d0f1c;
  --card-bg:      rgba(255,255,255,0.04);
  --card-border:  rgba(255,255,255,0.08);
  --card-hover:   rgba(255,255,255,0.06);
  --purple:       #7c3aed;
  --purple-light: #a855f7;
  --cyan:         #06b6d4;
  --cyan-light:   #22d3ee;
  --grad:         linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
  --grad-hover:   linear-gradient(135deg, #6d28d9 0%, #0891b2 100%);
  --text:         #e2e8f0;
  --text-2:       #94a3b8;
  --text-3:       #64748b;
  --success:      #10b981;
  --error:        #ef4444;
  --radius:       16px;
  --radius-sm:    10px;
  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:    0 8px 48px rgba(0,0,0,0.6);
  --transition:   0.2s ease;
}

html { scroll-behavior: smooth; }

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

/* Background mesh gradient */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(124,58,237,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(6,182,212,0.1) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7,8,15,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
}

.header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-icon {
  display: flex;
  align-items: center;
  filter: drop-shadow(0 0 8px rgba(124,58,237,0.6));
}

.logo-text {
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.3px;
}

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

.header-badges {
  display: flex;
  gap: 8px;
}

.badge {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 500;
}

.badge-privacy {
  background: rgba(16,185,129,0.12);
  color: #34d399;
  border: 1px solid rgba(16,185,129,0.2);
}

.badge-free {
  background: rgba(124,58,237,0.12);
  color: var(--purple-light);
  border: 1px solid rgba(124,58,237,0.2);
}

/* ---------- Main ---------- */
.main {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  margin-bottom: 40px;
}

.hero-title {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

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

.hero-sub {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Init Loader ---------- */
.init-loader {
  text-align: center;
  padding: 60px 24px;
  animation: fadeIn 0.4s ease;
}

.init-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(124,58,237,0.2);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto 20px;
}

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

.init-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.init-sub {
  font-size: 0.82rem;
  color: var(--text-3);
}

/* ---------- Cards ---------- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.step-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--grad);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
}

/* ---------- Drop Zone ---------- */
.upload-section { padding: 20px; }

.drop-zone {
  position: relative;
  border: 2px dashed var(--card-border);
  border-radius: var(--radius-sm);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  background: rgba(255,255,255,0.02);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--purple);
  background: rgba(124,58,237,0.06);
  transform: scale(1.005);
}

.drop-zone.drag-over {
  border-color: var(--cyan);
  background: rgba(6,182,212,0.06);
  box-shadow: 0 0 0 4px rgba(6,182,212,0.1);
}

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-icon-wrap {
  display: inline-flex;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 12px rgba(124,58,237,0.4));
}

.drop-icon {
  width: 64px;
  height: 64px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.drop-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.drop-sub {
  font-size: 0.88rem;
  color: var(--text-2);
  margin-bottom: 12px;
}

.drop-link {
  color: var(--purple-light);
  cursor: pointer;
  font-weight: 500;
}

.drop-formats {
  font-size: 0.76rem;
  color: var(--text-3);
}

/* ---------- File Info ---------- */
.file-info-card { padding: 18px 20px; }

.file-info-header {
  display: flex;
  align-items: center;
  gap: 16px;
}

.file-thumb-wrap {
  flex-shrink: 0;
  width: 72px;
  height: 54px;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
}

.file-thumb-wrap video,
.file-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.file-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
}

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

.file-name {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
}

.file-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 500;
  background: rgba(124,58,237,0.12);
  color: var(--purple-light);
  border: 1px solid rgba(124,58,237,0.2);
}

.btn-icon {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-2);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition);
}

.btn-icon:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text);
}

/* ---------- Options ---------- */
.option-group { margin-bottom: 20px; }

.option-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
}

.format-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  background: rgba(255,255,255,0.03);
  color: var(--text-2);
  font-size: 0.82rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.format-btn:hover {
  border-color: rgba(124,58,237,0.4);
  background: rgba(124,58,237,0.08);
  color: var(--text);
  transform: translateY(-1px);
}

.format-btn.active {
  border-color: var(--purple);
  background: rgba(124,58,237,0.15);
  color: var(--purple-light);
  box-shadow: 0 0 0 1px var(--purple), 0 0 16px rgba(124,58,237,0.2);
}

.format-icon { font-size: 1.2rem; }

/* ---------- Advanced Panel ---------- */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 0.83rem;
  font-weight: 500;
  font-family: inherit;
  padding: 8px 14px;
  cursor: pointer;
  transition: all var(--transition);
  width: 100%;
  justify-content: center;
}

.advanced-toggle:hover {
  border-color: rgba(124,58,237,0.4);
  color: var(--text);
  background: rgba(124,58,237,0.06);
}

.advanced-toggle .chevron {
  margin-left: auto;
  transition: transform 0.25s ease;
}

.advanced-toggle.open .chevron { transform: rotate(180deg); }

.advanced-panel {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideUp 0.25s ease;
}

.adv-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  gap: 12px;
}

.adv-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.select-wrap { position: relative; }

.select {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  padding: 9px 12px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.select:focus {
  outline: none;
  border-color: var(--purple);
  box-shadow: 0 0 0 2px rgba(124,58,237,0.2);
}

.select option {
  background: #1a1b2e;
  color: var(--text);
}

/* CRF Slider */
.slider-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-val {
  font-size: 0.72rem;
  color: var(--text-3);
  min-width: 20px;
}

.slider {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 100px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
}

.slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--grad);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(124,58,237,0.5);
  transition: transform 0.15s ease;
}

.slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

.slider-current {
  min-width: 28px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--purple-light);
  background: rgba(124,58,237,0.12);
  border-radius: 6px;
  padding: 2px 6px;
}

/* Trim */
.trim-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.trim-input-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.trim-label {
  font-size: 0.7rem;
  color: var(--text-3);
}

.trim-input {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: 'Courier New', monospace;
  padding: 8px 10px;
  width: 110px;
  transition: border-color var(--transition);
}

.trim-input:focus {
  outline: none;
  border-color: var(--purple);
  box-shadow: 0 0 0 2px rgba(124,58,237,0.2);
}

.trim-arrow { color: var(--text-3); font-size: 1.1rem; }

/* Tooltip */
.tooltip {
  position: relative;
  cursor: help;
  color: var(--text-3);
  display: inline-flex;
}

.tooltip-text {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #1e2035;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-2);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 10;
  box-shadow: var(--shadow);
}

.tooltip:hover .tooltip-text { opacity: 1; }

/* ---------- Convert Button ---------- */
.convert-btn-wrap {
  display: flex;
  justify-content: center;
  margin: 8px 0;
}

.btn-convert {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--grad);
  border: none;
  border-radius: 100px;
  color: white;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  padding: 14px 40px;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4), 0 2px 8px rgba(0,0,0,0.3);
  letter-spacing: 0.2px;
}

.btn-convert:hover {
  background: var(--grad-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.5), 0 4px 12px rgba(0,0,0,0.4);
}

.btn-convert:active { transform: translateY(0); }

.btn-convert:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Progress ---------- */
.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.progress-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(6,182,212,0.4);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(6,182,212,0.4); }
  70%  { box-shadow: 0 0 0 8px rgba(6,182,212,0); }
  100% { box-shadow: 0 0 0 0 rgba(6,182,212,0); }
}

.progress-stats {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-2);
}

.stat {
  font-weight: 600;
  color: var(--text);
}

.stat-divider { color: var(--text-3); }

.progress-bar-track {
  position: relative;
  height: 8px;
  background: rgba(255,255,255,0.07);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--grad);
  border-radius: 100px;
  transition: width 0.4s ease;
}

.progress-glow {
  position: absolute;
  top: 50%;
  transform: translate(-50%,-50%);
  width: 40px;
  height: 20px;
  background: radial-gradient(ellipse, rgba(124,58,237,0.8) 0%, transparent 70%);
  transition: left 0.4s ease;
  pointer-events: none;
}

.progress-cmd {
  font-size: 0.72rem;
  color: var(--text-3);
  font-family: 'Courier New', monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- Result ---------- */
.result-section {
  border-color: rgba(16,185,129,0.2);
  background: rgba(16,185,129,0.04);
}

.result-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.result-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
  flex-shrink: 0;
  animation: popIn 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

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

.result-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--success);
}

.result-sub {
  font-size: 0.82rem;
  color: var(--text-2);
  margin-top: 2px;
}

.result-compare {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.compare-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 80px;
}

.compare-label {
  font-size: 0.72rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.compare-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.compare-ratio { color: var(--cyan); }

.compare-arrow {
  color: var(--text-3);
  display: flex;
}

.result-preview {
  margin-bottom: 16px;
}

.result-preview video,
.result-preview img {
  width: 100%;
  max-height: 280px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.3);
}

.result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-download {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--grad);
  border-radius: 100px;
  color: white;
  font-size: 0.92rem;
  font-weight: 700;
  font-family: inherit;
  padding: 12px 28px;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(124,58,237,0.35);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.5);
}

.btn-again {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: 100px;
  color: var(--text-2);
  font-size: 0.88rem;
  font-weight: 500;
  font-family: inherit;
  padding: 12px 22px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-again:hover {
  background: rgba(255,255,255,0.09);
  color: var(--text);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 999;
  animation: toastIn 0.3s ease forwards;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
}

@keyframes toastIn {
  to { transform: translateX(-50%) translateY(0); }
}

.error-toast {
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
}

/* ---------- Footer ---------- */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--card-border);
  font-size: 0.78rem;
  color: var(--text-3);
  line-height: 1.6;
}

.footer strong { color: var(--text-2); }

/* ---------- Utility ---------- */
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .hero-title { font-size: 1.7rem; }
  .adv-row { grid-template-columns: 1fr; }
  .adv-label { margin-bottom: 4px; }
  .header-badges .badge-free { display: none; }
  .format-grid { grid-template-columns: repeat(5, 1fr); }
  .result-compare { gap: 10px; }
  .compare-arrow { display: none; }
}