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

:root {
  --bg: #0f0f13;
  --surface: #18181f;
  --surface2: #22222c;
  --border: #2e2e3a;
  --accent: #6c63ff;
  --accent2: #a78bfa;
  --text: #e8e8f0;
  --muted: #888899;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 12px;
}

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

.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(15,15,19,0.92);
  backdrop-filter: blur(12px);
  z-index: 10;
}
header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.5px; }
.logo span { color: var(--accent2); }
nav a { color: var(--muted); text-decoration: none; margin-left: 24px; font-size: 0.9rem; transition: color .2s; }
nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 56px 0 32px; text-align: center; }
h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 800; letter-spacing: -1px; background: linear-gradient(135deg, #fff 0%, var(--accent2) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.subtitle { color: var(--muted); margin-top: 12px; font-size: 1.05rem; line-height: 1.8; }

/* Converter */
.converter { padding: 0 0 48px; }

.options {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.options label { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.format-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.fmt-btn {
  padding: 6px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all .15s;
}
.fmt-btn:hover { border-color: var(--accent); color: var(--text); }
.fmt-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.quality-label { margin-left: auto; color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
#quality { width: 120px; accent-color: var(--accent); }

/* Drop zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 56px 24px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: var(--surface);
  position: relative;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(108,99,255,0.06);
}
.drop-zone input[type="file"] { display: none; }
.drop-inner { pointer-events: none; }
.drop-inner svg { color: var(--muted); margin-bottom: 16px; }
.drop-inner p { color: var(--muted); font-size: 1rem; }
.browse-link { color: var(--accent2); cursor: pointer; text-decoration: underline; pointer-events: all; }
.supported { font-size: 0.8rem; margin-top: 8px; color: #555566; }

/* Results */
.results { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.result-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.result-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}
.result-info { flex: 1; min-width: 0; }
.result-name { font-weight: 600; font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.result-sizes { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }
.result-saving {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 700;
}
.saving-good { background: rgba(34,197,94,0.15); color: var(--success); }
.saving-bad { background: rgba(245,158,11,0.15); color: var(--warning); }

.dl-btn {
  padding: 8px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background .2s;
  white-space: nowrap;
}
.dl-btn:hover { background: #7c74ff; }

.processing { color: var(--muted); font-size: 0.85rem; animation: pulse 1.2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

.hidden { display: none !important; }

/* Convert button */
.convert-btn {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
  letter-spacing: 0.3px;
}
.convert-btn:hover { background: #7c74ff; transform: translateY(-1px); }
.convert-btn:active { transform: translateY(0); }

/* Queue state */
.result-item.queued { opacity: 0.75; }
.waiting { color: #555566; font-style: italic; }
.remove-btn { background: var(--surface2) !important; color: var(--muted) !important; padding: 8px 14px !important; }
.remove-btn:hover { background: #3a2020 !important; color: #f87171 !important; }

/* Email modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  max-width: 420px;
  width: 100%;
  text-align: center;
}
.modal h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: 12px; }
.modal p { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; line-height: 1.6; }
.modal form { display: flex; flex-direction: column; gap: 12px; }
.modal input[type="email"] {
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color .2s;
}
.modal input[type="email"]:focus { border-color: var(--accent); }
.modal .dl-btn { width: 100%; padding: 12px; font-size: 1rem; }
.skip-btn {
  margin-top: 14px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.82rem;
  cursor: pointer;
  text-decoration: underline;
}
.skip-btn:hover { color: var(--text); }

/* Warning */
.warning {
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--warning);
}

/* Info section */
.info { padding: 64px 0; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.info h2, .faq h2 { font-size: 1.7rem; font-weight: 800; text-align: center; margin-bottom: 40px; letter-spacing: -0.5px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; }
.card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; }
.card-icon { font-size: 1.8rem; margin-bottom: 12px; }
.card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.card p { font-size: 0.85rem; color: var(--muted); }

/* FAQ */
.faq { padding: 64px 0; }
.faq-list { display: flex; flex-direction: column; gap: 8px; }
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--accent2); font-size: 1.3rem; font-weight: 300; }
details[open] summary::after { content: '−'; }
details p { padding: 0 24px 18px; color: var(--muted); font-size: 0.9rem; }

/* Footer */
footer { padding: 32px 0; border-top: 1px solid var(--border); text-align: center; }
footer p { color: var(--muted); font-size: 0.82rem; }

@media (max-width: 600px) {
  .options { gap: 12px; }
  .quality-label, #quality { margin-left: 0; }
  .result-item { flex-direction: column; align-items: flex-start; }
  .dl-btn { width: 100%; text-align: center; }
}