/* ============================================================
   WebP Forge — Premium Dark UI
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #080b14;
  --surface: rgba(255,255,255,0.045);
  --surface-hover: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.09);
  --border-hover: rgba(139,92,246,0.5);
  --text: #e2e8f0;
  --text-muted: #64748b;
  --accent: #a78bfa;
  --accent-2: #38bdf8;
  --success: #4ade80;
  --danger: #f87171;
  --pink: #f472b6;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 25px 60px rgba(0,0,0,0.5);
  --shadow-sm: 0 4px 20px rgba(0,0,0,0.3);
  --font: 'Inter', system-ui, sans-serif;
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Background Orbs ── */
.bg-orbs { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.18;
  animation: drift 20s ease-in-out infinite alternate;
}
.orb-1 { width: 600px; height: 600px; background: #7c3aed; top: -200px; left: -150px; animation-delay: 0s; }
.orb-2 { width: 500px; height: 500px; background: #2563eb; top: 30%; right: -100px; animation-delay: -7s; }
.orb-3 { width: 400px; height: 400px; background: #db2777; bottom: -100px; left: 30%; animation-delay: -14s; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 40px) scale(1.08); }
}

/* ── Header ── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,11,20,0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 15px rgba(124,58,237,0.4);
}
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem; font-weight: 700; color: white; letter-spacing: -0.5px;
}
.logo-accent { color: var(--accent); }
.header-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  padding: 4px 12px; border-radius: 100px;
  font-size: 0.72rem; font-weight: 500;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Main ── */
.main {
  position: relative; z-index: 1;
  max-width: 960px; margin: 0 auto;
  padding: 48px 24px 100px;
}

/* ── Hero ── */
.hero { text-align: center; margin-bottom: 40px; }
.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  color: white;
  margin-bottom: 14px;
}
.gradient-text {
  background: linear-gradient(135deg, #a78bfa 0%, #38bdf8 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
  background-size: 200%;
}
@keyframes shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px; margin: 0 auto;
  line-height: 1.7;
}
.hero-subtitle strong { color: var(--accent); }

/* ── Controls Card ── */
.controls-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 28px;
  backdrop-filter: blur(20px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.strategy-group { grid-column: 1 / -1; }
.control-group {}
.control-label {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.85rem; font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.quality-value {
  font-size: 1rem; font-weight: 700;
  color: var(--accent);
  background: rgba(167,139,250,0.1);
  border-radius: 6px;
  padding: 2px 8px;
}

/* ── Slider ── */
.slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 100px; outline: none; cursor: pointer;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #a78bfa, #38bdf8);
  cursor: pointer;
  box-shadow: 0 0 12px rgba(167,139,250,0.6);
  transition: transform 0.15s;
}
.slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.slider-hints {
  display: flex; justify-content: space-between;
  font-size: 0.72rem; color: var(--text-muted);
  margin-top: 8px;
}

/* ── Toggle ── */
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-knob {
  position: absolute; inset: 0;
  background: rgba(255,255,255,0.1);
  border: 1px solid var(--border);
  border-radius: 100px; transition: 0.3s;
}
.toggle-knob::before {
  content: ''; position: absolute;
  width: 18px; height: 18px;
  background: white; border-radius: 50%;
  top: 2px; left: 2px;
  transition: 0.3s;
}
.toggle-switch input:checked + .toggle-knob {
  background: linear-gradient(135deg, #a78bfa, #38bdf8);
  border-color: #a78bfa;
}
.toggle-switch input:checked + .toggle-knob::before { transform: translateX(20px); }

/* ── Resize Options ── */
.resize-options { display: flex; gap: 10px; margin-top: 4px; }
.number-input {
  flex: 1; padding: 10px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font); font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.number-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(167,139,250,0.15);
}

/* ── Strategy Buttons ── */
.strategy-buttons { display: flex; gap: 12px; }
.strategy-btn {
  flex: 1; padding: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.strategy-btn .strategy-icon { font-size: 1.4rem; }
.strategy-btn span { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.strategy-btn small { font-size: 0.72rem; color: var(--text-muted); }
.strategy-btn:hover { border-color: var(--border-hover); background: var(--surface-hover); }
.strategy-btn.active {
  border-color: var(--accent);
  background: rgba(167,139,250,0.1);
  box-shadow: 0 0 20px rgba(167,139,250,0.15);
}
.strategy-btn.active span { color: var(--accent); }

/* ── Drop Zone ── */
.drop-zone {
  border: 2px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 64px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--surface);
  backdrop-filter: blur(20px);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.drop-zone::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at center, rgba(124,58,237,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.drop-zone:hover, .drop-zone.dragging {
  border-color: var(--accent);
  background: rgba(167,139,250,0.06);
  box-shadow: 0 0 40px rgba(167,139,250,0.1), inset 0 0 40px rgba(167,139,250,0.03);
  transform: scale(1.005);
}
.drop-icon { margin-bottom: 20px; display: inline-block; animation: bounce 3s ease-in-out infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.drop-title { font-size: 1.3rem; font-weight: 700; color: white; margin-bottom: 8px; }
.drop-sub { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 8px; }
.browse-btn {
  background: none; border: none; cursor: pointer;
  color: var(--accent); font-weight: 600; font-size: inherit;
  text-decoration: underline; text-underline-offset: 3px;
  transition: color 0.2s;
}
.browse-btn:hover { color: var(--accent-2); }
.drop-limit { font-size: 0.75rem; color: rgba(100,116,139,0.6); }

/* ── Stats Bar ── */
.stats-bar {
  display: flex; align-items: center; justify-content: space-around;
  background: var(--surface); backdrop-filter: blur(20px);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 28px; margin-bottom: 20px;
  animation: fadeIn 0.4s ease;
}
.stat-item { text-align: center; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 700; color: white; font-family: var(--font-heading); }
.stat-value.green { color: var(--success); }
.stat-value.accent { color: var(--accent); }
.stat-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-divider { width: 1px; height: 36px; background: var(--border); }

/* ── Action Bar ── */
.action-bar { display: flex; gap: 12px; justify-content: center; margin-bottom: 32px; animation: fadeIn 0.4s ease; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 100px;
  font-weight: 600; font-size: 0.95rem; font-family: var(--font);
  cursor: pointer; border: none; outline: none;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  color: white;
  box-shadow: 0 4px 24px rgba(124,58,237,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.55);
}
.btn-secondary {
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
}
.btn-success {
  background: linear-gradient(135deg, #059669, #10b981);
  color: white;
  box-shadow: 0 4px 24px rgba(16,185,129,0.35);
}
.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16,185,129,0.5);
}
.btn:active { transform: scale(0.97) !important; }

/* ── Image Grid ── */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

/* ── Image Card ── */
.img-card {
  background: var(--surface); backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.25s ease;
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}
@keyframes popIn {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}
.img-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.4); border-color: var(--border-hover); }
.img-thumb-wrap { position: relative; aspect-ratio: 4/3; overflow: hidden; background: rgba(0,0,0,0.3); }
.img-thumb { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.img-card:hover .img-thumb { transform: scale(1.05); }
.img-status-badge {
  position: absolute; top: 8px; right: 8px;
  padding: 3px 8px; border-radius: 100px;
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  backdrop-filter: blur(10px);
}
.badge-pending { background: rgba(100,116,139,0.8); color: white; }
.badge-processing { background: rgba(124,58,237,0.8); color: white; }
.badge-done { background: rgba(16,185,129,0.85); color: white; }
.badge-error { background: rgba(239,68,68,0.85); color: white; }

.img-info { padding: 12px 14px; }
.img-name { font-size: 0.78rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 6px; }
.img-sizes { display: flex; justify-content: space-between; align-items: center; font-size: 0.72rem; color: var(--text-muted); }
.img-sizes .saving { color: var(--success); font-weight: 700; }
.img-sizes .saving.negative { color: var(--danger); }

.img-progress { height: 3px; background: rgba(255,255,255,0.06); position: relative; }
.img-progress-fill {
  height: 100%; width: 0%; border-radius: 100px;
  background: linear-gradient(90deg, #a78bfa, #38bdf8);
  transition: width 0.3s ease;
}
.img-progress-fill.done { background: linear-gradient(90deg, #059669, #10b981); }

.img-card-actions {
  display: flex; gap: 6px; padding: 0 14px 12px;
}
.card-btn {
  flex: 1; padding: 7px; border-radius: 8px;
  font-size: 0.72rem; font-weight: 600;
  cursor: pointer; border: none;
  display: flex; align-items: center; justify-content: center; gap: 4px;
  transition: all 0.2s; font-family: var(--font);
}
.card-btn-download {
  background: rgba(16,185,129,0.15);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.25);
}
.card-btn-download:hover { background: rgba(16,185,129,0.25); }
.card-btn-remove {
  background: rgba(239,68,68,0.1);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.2);
}
.card-btn-remove:hover { background: rgba(239,68,68,0.2); }

/* ── Download Bar ── */
.download-bar {
  text-align: center;
  animation: fadeIn 0.4s ease;
  padding: 16px 0;
}
.download-hint { font-size: 0.82rem; color: var(--text-muted); margin-top: 10px; }

/* ── Progress Overlay ── */
.overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.3s ease;
}
.overlay-card {
  background: #111827;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 48px 56px;
  text-align: center;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6);
  min-width: 320px;
  animation: slideUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes slideUp { from{opacity:0;transform:translateY(40px) scale(0.9)} to{opacity:1;transform:none} }
.progress-ring-wrap { position: relative; display: inline-block; margin-bottom: 24px; }
.progress-ring { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 8; }
.ring-fill {
  fill: none; stroke: #a78bfa; stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 314;
  stroke-dashoffset: 314;
  transition: stroke-dashoffset 0.4s ease;
}
.ring-text {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.ring-percent {
  font-size: 1.8rem; font-weight: 800; color: white;
  font-family: var(--font-heading);
}
.overlay-title { font-size: 1.25rem; font-weight: 700; color: white; margin-bottom: 8px; }
.overlay-sub { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 20px; }
.overlay-progress-bar {
  height: 6px; background: rgba(255,255,255,0.06);
  border-radius: 100px; overflow: hidden;
}
.overlay-progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, #7c3aed, #38bdf8);
  border-radius: 100px;
  transition: width 0.3s ease;
}

/* ── Result Popup ── */
.popup-backdrop {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(16px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.3s ease;
  padding: 24px;
}
.popup {
  background: linear-gradient(160deg, #111827 0%, #0d1117 100%);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 48px 44px;
  max-width: 480px; width: 100%;
  text-align: center;
  box-shadow: 0 40px 80px rgba(0,0,0,0.7), 0 0 60px rgba(124,58,237,0.1);
  animation: popIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow-y: auto;
  max-height: 90vh;
}
.popup-close {
  position: absolute; top: 16px; right: 16px;
  background: rgba(255,255,255,0.07); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 50%;
  width: 32px; height: 32px; cursor: pointer; font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.popup-close:hover { background: rgba(255,255,255,0.12); color: white; }
.popup-icon { font-size: 3.5rem; margin-bottom: 12px; display: block; animation: celebrate 1s ease; }
@keyframes celebrate { 0%{transform:scale(0) rotate(-20deg)} 60%{transform:scale(1.2) rotate(5deg)} 100%{transform:scale(1) rotate(0)} }
.popup-title {
  font-family: var(--font-heading);
  font-size: 1.6rem; font-weight: 700; color: white;
  margin-bottom: 28px;
}
.popup-stats {
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 24px;
}
.popup-stat {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.popup-stat.highlight { border-color: rgba(74,222,128,0.2); background: rgba(74,222,128,0.05); }
.popup-stat.big {
  padding: 18px 18px;
  background: rgba(167,139,250,0.07);
  border-color: rgba(167,139,250,0.25);
}
.popup-stat-label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }
.popup-stat-value { font-weight: 700; color: white; font-size: 1rem; font-family: var(--font-heading); }
.popup-stat-value.green { color: var(--success); }
.popup-stat-value.accent { color: var(--accent); }
.popup-stat-value.large { font-size: 1.6rem; }

.popup-bar-wrap { margin-bottom: 28px; text-align: left; }
.popup-bar-label { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 6px; }
.popup-bar-track {
  height: 10px; background: rgba(255,255,255,0.06);
  border-radius: 100px; overflow: hidden;
  position: relative;
}
.popup-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #059669, #10b981);
  border-radius: 100px;
  transition: width 1s cubic-bezier(0.34, 1, 0.64, 1);
  position: relative;
}
.popup-bar-fill::after {
  content: '';
  position: absolute; right: 0; top: 0; bottom: 0;
  width: 20px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
  border-radius: 100px;
}
.popup-download-btn { width: 100%; justify-content: center; }

/* ── Utilities ── */
@keyframes fadeIn { from{opacity:0} to{opacity:1} }

/* ── Responsive ── */
@media(max-width:640px) {
  .controls-card { grid-template-columns: 1fr; }
  .strategy-buttons { flex-direction: column; }
  .action-bar { flex-direction: column; align-items: stretch; }
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .header-badges { display: none; }
  .overlay-card { padding: 36px 28px; }
  .popup { padding: 36px 24px; }
  .stats-bar { flex-wrap: wrap; gap: 16px; }
  .stat-divider { display: none; }
}