:root {
  --bg-void: #060714;
  --bg-panel: #0b0d21;
  --bg-panel-alt: #10132b;
  --line: rgba(123, 213, 255, 0.14);
  --cyan: #4df3ff;
  --magenta: #ff3ea5;
  --violet: #9b6bff;
  --amber: #ffd166;
  --text-hi: #eaf3ff;
  --text-mid: #93a1c9;
  --text-low: #59628a;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-void);
  color: var(--text-hi);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- ambient background ---------- */

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(77, 243, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 243, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 40%, transparent 90%);
  pointer-events: none;
}

.scan-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0%, rgba(77,243,255,0.035) 50%, transparent 100%);
  background-size: 100% 6px;
  animation: scanmove 9s linear infinite;
  opacity: 0.6;
}
@keyframes scanmove {
  0% { background-position: 0 0; }
  100% { background-position: 0 900px; }
}

/* ---------- topbar ---------- */

.topbar {
  position: relative;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 32px;
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; letter-spacing: 0.08em; font-size: 18px; }
.brand-mark { color: var(--cyan); text-shadow: 0 0 12px var(--cyan); }
.accent { color: var(--magenta); text-shadow: 0 0 14px rgba(255,62,165,0.6); }

.topbar-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-low);
  display: flex;
  align-items: center;
  gap: 8px;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 8px var(--violet);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ---------- stage / hero ---------- */

.stage {
  position: relative;
  z-index: 5;
  max-width: 780px;
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.hero { text-align: center; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--cyan);
  margin: 0 0 18px;
}

.headline {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.25;
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}

.sub {
  color: var(--text-mid);
  font-size: 15px;
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
}

/* ---------- scan bar (signature element) ---------- */

.scan-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-panel);
  border: 1px solid rgba(77,243,255,0.3);
  border-radius: 10px;
  padding: 6px 6px 6px 18px;
  box-shadow: 0 0 0 1px rgba(77,243,255,0.05), 0 0 30px -8px rgba(77,243,255,0.35);
  overflow: hidden;
}

.scan-bar-icon { color: var(--cyan); font-family: var(--font-mono); }

#url-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-hi);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 14px 4px;
}
#url-input::placeholder { color: var(--text-low); }

#scan-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(120deg, var(--cyan), var(--violet));
  color: #060714;
  border: none;
  border-radius: 7px;
  padding: 12px 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}
#scan-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 18px -4px rgba(77,243,255,0.6); }
#scan-btn:active { transform: translateY(0); }
#scan-btn:disabled { opacity: 0.5; cursor: progress; transform: none; }

.scan-bar-beam {
  position: absolute;
  top: 0; left: -30%;
  width: 30%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(77,243,255,0.18), transparent);
  pointer-events: none;
  opacity: 0;
}
.scan-bar-beam.active {
  opacity: 1;
  animation: sweep 1.1s linear infinite;
}
@keyframes sweep {
  0% { left: -30%; }
  100% { left: 100%; }
}

.hint-row {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-low);
  letter-spacing: 0.03em;
}
.hint-sep { margin: 0 8px; color: var(--violet); }

/* ---------- status panel ---------- */

.status-panel {
  margin-top: 36px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
}
.status-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-bottom: 12px;
}
.status-led {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
  animation: pulse 1s ease-in-out infinite;
}
.status-track {
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}
.status-fill {
  height: 100%;
  width: 30%;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--magenta));
  animation: loadbar 1.4s ease-in-out infinite;
}
@keyframes loadbar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(330%); }
}

/* ---------- result panel ---------- */

.result-panel { margin-top: 36px; }

.result-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  animation: reveal 0.4s ease-out;
}
@keyframes reveal {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-panel-alt);
  overflow: hidden;
}
.result-thumb-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}
.result-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(6,7,20,0.75);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 4px 10px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}

.result-body { padding: 22px 22px 24px; text-align: left; }

.result-title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 18px;
  margin: 0 0 6px;
  line-height: 1.4;
}
.result-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-low);
  margin-bottom: 18px;
}

.formats-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }

.format-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
}
.format-info { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12px; }
.format-res { color: var(--text-hi); font-weight: 500; }
.format-tag {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}
.format-tag.video { background: rgba(155,107,255,0.15); color: var(--violet); border: 1px solid rgba(155,107,255,0.4); }
.format-tag.audio { background: rgba(255,62,165,0.15); color: var(--magenta); border: 1px solid rgba(255,62,165,0.4); }
.format-size { color: var(--text-low); }

.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  background: transparent;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 7px 12px;
  border-radius: 6px;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.dl-btn:hover { background: var(--cyan); color: #060714; }

.disclaimer {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
  line-height: 1.6;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
  margin: 6px 0 0;
}

/* ---------- error panel ---------- */

.error-panel {
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,62,165,0.06);
  border: 1px solid rgba(255,62,165,0.4);
  border-radius: 10px;
  padding: 16px 20px;
  color: var(--magenta);
  font-family: var(--font-mono);
  font-size: 13px;
}
.error-icon {
  width: 22px; height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--magenta);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
}

.hidden { display: none !important; }

/* ---------- footer ---------- */

.footer {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-low);
  border-top: 1px solid var(--line);
}
.footer code { color: var(--violet); }

/* ---------- responsive ---------- */

@media (max-width: 560px) {
  .scan-bar { flex-wrap: wrap; padding: 14px; }
  #url-input { width: 100%; order: 1; padding: 10px 4px; }
  .scan-bar-icon { order: 0; }
  #scan-btn { order: 2; width: 100%; justify-content: center; margin-top: 8px; }
  .format-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .dl-btn { width: 100%; justify-content: center; }
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}