:root {
  --bg: #0b1020;
  --bg-soft: #121933;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf6;
  --text-dim: #9aa6c4;
  --primary: #6d7bff;
  --primary-2: #8b5cff;
  --accent: #34d399;
  --danger: #ff6b81;
  --radius: 16px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #1b2550 0%, transparent 60%),
    radial-gradient(900px 500px at 0% 10%, #221a4d 0%, transparent 55%), var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
  overflow-x: hidden;
}

.container {
  width: min(960px, 92%);
  margin: 0 auto;
}

/* Background orbs */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: -1;
  filter: blur(60px);
  opacity: 0.5;
}
.orb {
  position: absolute;
  border-radius: 50%;
}
.orb-1 {
  width: 320px;
  height: 320px;
  background: #5b6bff;
  top: -60px;
  right: 10%;
  animation: float 14s ease-in-out infinite;
}
.orb-2 {
  width: 260px;
  height: 260px;
  background: #8b5cff;
  bottom: 5%;
  left: 5%;
  animation: float 18s ease-in-out infinite reverse;
}
.orb-3 {
  width: 200px;
  height: 200px;
  background: #34d399;
  top: 40%;
  right: 30%;
  animation: float 22s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-30px) translateX(20px); }
}

/* Header */
.site-header {
  padding: 22px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.2rem;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  font-size: 1.1rem;
  box-shadow: var(--shadow);
}
.privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-dim);
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 7px 14px;
  border-radius: 999px;
}
.privacy-pill .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18);
}

/* Hero */
.hero {
  text-align: center;
  padding: 40px 0 28px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff, #b9c2ff 60%, #d9b8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 560px;
  margin-inline: auto;
}
.hero-sub strong {
  color: var(--text);
}

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}
.converter {
  padding: 22px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.1s;
  background: rgba(255, 255, 255, 0.02);
}
.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--primary);
  background: rgba(109, 123, 255, 0.07);
  outline: none;
}
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(52, 211, 153, 0.08);
  transform: scale(1.01);
}
.dropzone-icon {
  font-size: 2.4rem;
}
.dropzone-title {
  font-weight: 600;
  margin-top: 6px;
}
.dropzone-hint {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 4px;
}
.dropzone .link {
  color: var(--primary);
  font-weight: 600;
}

/* Controls */
.controls {
  display: grid;
  grid-template-columns: 1fr 1.4fr auto;
  gap: 18px;
  align-items: end;
  margin-top: 22px;
}
.control label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
}
select:focus {
  outline: 2px solid var(--primary);
}
input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}
#qualityValue {
  color: var(--text);
  font-weight: 600;
}
.actions {
  display: flex;
  gap: 10px;
}

/* Buttons */
.btn {
  border: none;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.08s, opacity 0.2s, background 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}
.btn:active {
  transform: translateY(1px);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
}
.btn-primary:not(:disabled):hover {
  filter: brightness(1.08);
}
.btn-secondary {
  background: var(--accent);
  color: #04261a;
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--card-border);
}
.btn-ghost:not(:disabled):hover {
  color: var(--text);
  border-color: var(--text-dim);
}
.btn-small {
  padding: 8px 14px;
  font-size: 0.85rem;
}

/* Bulk bar */
.bulk-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
}
.bulk-status {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* File list */
.file-list {
  list-style: none;
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.file-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
}
.thumb {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-soft);
  display: grid;
  place-items: center;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.file-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.file-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-size {
  font-size: 0.82rem;
  color: var(--text-dim);
}
.file-state {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.status {
  font-size: 0.82rem;
  color: var(--text-dim);
}
.status.done {
  color: var(--accent);
}
.status.error {
  color: var(--danger);
}

/* Trust section */
.trust {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 40px 0;
}
.trust-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px;
}
.trust-icon {
  font-size: 1.6rem;
  margin-bottom: 8px;
}
.trust-item h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.trust-item p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 24px 0;
  margin-top: 20px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.footer-nav a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 16px;
}
.footer-nav a:hover {
  color: var(--text);
}

/* Legal pages */
.legal {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  margin: 30px 0;
}
.legal h1 {
  margin-bottom: 8px;
}
.legal p,
.legal li {
  color: var(--text-dim);
  margin-bottom: 12px;
}
.legal h2 {
  margin: 22px 0 8px;
  color: var(--text);
  font-size: 1.15rem;
}
.legal ul {
  padding-left: 20px;
}
.legal a {
  color: var(--primary);
}

/* Responsive */
@media (max-width: 720px) {
  .controls {
    grid-template-columns: 1fr;
  }
  .trust {
    grid-template-columns: 1fr;
  }
  .actions {
    justify-content: stretch;
  }
  .actions .btn {
    flex: 1;
  }
  .privacy-pill {
    display: none;
  }
}