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

:root {
  --bg:       #080B10;
  --surface:  #0E1319;
  --border:   #1C2330;
  --border-hi:#2E3D52;
  --accent:   #FF5500;
  --accent2:  #FF8C42;
  --yt:       #FF0000;
  --gradient: linear-gradient(135deg, var(--accent), var(--yt));
  --text:     #E8EDF5;
  --muted:    #5A6880;
  --success:  #2ECC71;
  --error:    #E74C3C;
  --radius:   6px;
  --mono:     'Space Mono', monospace;
  --display:  'Syne', sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--display);
  overflow-x: hidden;
}

/* -- GRAIN OVERLAY -- */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  opacity: 0.5;
}

/* -- GLOW SPOT -- */
body::after {
  content: '';
  position: fixed;
  top: -20vh; left: 50%; transform: translateX(-50%);
  width: 80vw; height: 60vh;
  background:
    radial-gradient(ellipse at 35% center, rgba(255,85,0,0.07) 0%, transparent 60%),
    radial-gradient(ellipse at 65% center, rgba(255,0,0,0.06) 0%, transparent 60%);
  pointer-events: none; z-index: 0;
}

.wrapper {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 48px 24px;
  gap: 48px;
}

/* -- HEADER -- */
header {
  text-align: center;
}
.logo-line {
  display: flex; align-items: center; gap: 12px;
  justify-content: center;
  margin-bottom: 10px;
}
.logo-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
}
.logo-icon svg { width: 100%; height: 100%; }

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}
h1 span {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 8px;
}

/* -- WAVEFORM DECORATION -- */
.waveform {
  display: flex; align-items: center; gap: 3px;
  height: 32px; margin: 0 auto 6px;
}
.waveform .bar {
  width: 3px; background: linear-gradient(to top, var(--accent), var(--yt));
  border-radius: 2px; opacity: 0.6;
  animation: wave 1.2s ease-in-out infinite;
}
@keyframes wave {
  0%, 100% { transform: scaleY(0.3); }
  50%       { transform: scaleY(1); }
}

/* -- CARD -- */
.card {
  width: 100%; max-width: 560px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 0 0 1px rgba(255,85,0,0.04), 0 24px 64px rgba(0,0,0,0.5);
}

/* -- FORMAT SELECTOR -- */
.format-row {
  display: flex; gap: 8px; margin-bottom: 20px;
}
.fmt-btn {
  flex: 1;
  padding: 8px 4px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.15s;
}
.fmt-btn:hover { border-color: var(--border-hi); color: var(--text); }
.fmt-btn.active {
  background: rgba(255,85,0,0.12);
  border-color: var(--accent);
  color: var(--accent);
}

/* -- URL INPUT -- */
.input-group {
  position: relative; margin-bottom: 16px;
}
.label-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.input-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0;
}
.url-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 48px 14px 16px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.url-input::placeholder { color: var(--muted); }
.url-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255,85,0,0.1);
}
.paste-btn {
  position: absolute; right: 10px; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  color: var(--muted); cursor: pointer;
  font-size: 0.7rem; font-family: var(--mono);
  letter-spacing: 0.05em;
  transition: color 0.15s;
  padding: 4px;
}
.paste-btn:hover { color: var(--accent); }

/* -- PLATFORM BADGE -- */
.platform-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid;
}
.dl-platform {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid;
  white-space: nowrap;
  flex-shrink: 0;
  text-transform: uppercase;
}
.dl-platform.sc { color: #FF5500; background: rgba(255,85,0,0.1); border-color: rgba(255,85,0,0.25); }
.dl-platform.yt { color: #FF0000; background: rgba(255,0,0,0.1); border-color: rgba(255,0,0,0.25); }

/* -- PREVIEW CARD -- */
.preview {
  display: none;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 16px;
  gap: 14px;
  align-items: flex-start;
}
.preview.visible { display: flex; }
.preview-thumb {
  width: 64px; height: 64px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--border);
}
.preview-thumb-placeholder {
  width: 64px; height: 64px;
  border-radius: 4px;
  background: var(--border);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.preview-info { flex: 1; min-width: 0; }
.preview-title {
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}
.preview-artist {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.preview-duration {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
}

/* -- PLAYLIST BAR -- */
.playlist-bar {
  display: none;
  align-items: center;
  gap: 8px;
  background: rgba(255,85,0,0.06);
  border: 1px solid rgba(255,85,0,0.2);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.playlist-bar.visible { display: flex; }

/* -- ACTION BUTTONS -- */
.btn-row { display: flex; gap: 10px; width: 100%; }

.btn {
  flex: 1; padding: 14px;
  border: none; border-radius: var(--radius);
  font-family: var(--display); font-weight: 700;
  font-size: 0.88rem; letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.15s;
  position: relative; overflow: hidden;
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}
.btn-secondary:hover { border-color: var(--border-hi); color: var(--text); }

.btn-primary {
  background: var(--gradient);
  color: #fff;
}
.btn-primary:hover { filter: brightness(1.12); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled {
  opacity: 0.4; cursor: not-allowed;
  transform: none;
}

/* -- DOWNLOAD ALL BUTTON -- */
.btn-playlist {
  width: 100%;
  margin-top: 8px;
  padding: 12px;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-playlist:hover { background: rgba(255,85,0,0.1); }
.btn-playlist:disabled { opacity: 0.4; cursor: not-allowed; }

/* -- PROGRESS -- */
.progress-wrap {
  display: none;
  margin-top: 16px;
}
.progress-wrap.visible { display: block; }
.progress-bar-track {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--yt));
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s;
  animation: indeterminate 1.5s ease-in-out infinite;
}
@keyframes indeterminate {
  0%   { transform: translateX(-100%) scaleX(0.5); }
  100% { transform: translateX(200%) scaleX(0.5); }
}
.progress-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

/* -- STATUS MESSAGE -- */
.status {
  display: none;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.5;
}
.status.visible { display: block; }
.status.error { background: rgba(231,76,60,0.1); border: 1px solid rgba(231,76,60,0.3); color: var(--error); }
.status.success { background: rgba(46,204,113,0.08); border: 1px solid rgba(46,204,113,0.2); color: var(--success); }

/* -- DOWNLOAD QUEUE -- */
.dl-queue {
  display: none;
  flex-direction: column;
  gap: 6px;
  margin-top: 16px;
}
.dl-queue.has-items { display: flex; }

.dl-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}
.dl-item.queued      { border-color: rgba(90,104,128,0.2); opacity: 0.75; }
.dl-item.fetching    { border-color: rgba(255,85,0,0.15); }
.dl-item.downloading { border-color: rgba(255,85,0,0.3); }
.dl-item.ready       { border-color: rgba(46,204,113,0.35); }
.dl-item.done        { border-color: rgba(46,204,113,0.25); }
.dl-item.error       { border-color: rgba(231,76,60,0.25); }

/* thumbnail */
.dl-thumb {
  width: 44px; height: 44px;
  border-radius: 4px;
  background: var(--border);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.dl-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* track info */
.dl-info { flex: 1; min-width: 0; }
.dl-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
  margin-bottom: 3px;
}
.dl-meta-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.dl-meta {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.dl-fmt {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid;
  text-transform: uppercase;
  flex-shrink: 0;
  color: var(--accent);
  background: rgba(255,85,0,0.1);
  border-color: rgba(255,85,0,0.18);
}
.dl-fmt.sc { color: #FF5500; background: rgba(255,85,0,0.1); border-color: rgba(255,85,0,0.25); }
.dl-fmt.yt { color: #FF0000; background: rgba(255,0,0,0.1); border-color: rgba(255,0,0,0.25); }

/* status column */
.dl-status-col {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.dl-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,85,0,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.dl-item-icon {
  width: 14px; height: 14px;
  display: flex; align-items: center; justify-content: center;
}
.dl-item.done  .dl-item-icon { color: var(--success); }
.dl-item.error .dl-item-icon { color: var(--error); }

.dl-badge {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 3px;
  white-space: nowrap;
}
.dl-item.queued      .dl-badge { color: var(--muted);   background: rgba(90,104,128,0.12); }
.dl-item.fetching    .dl-badge { color: var(--muted);   background: rgba(90,104,128,0.15); }
.dl-item.downloading .dl-badge { color: var(--accent);  background: rgba(255,85,0,0.1); }
.dl-item.done        .dl-badge { color: var(--success); background: rgba(46,204,113,0.1); }
.dl-item.error       .dl-badge { color: var(--error);   background: rgba(231,76,60,0.1); }

.dl-download-btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 3px;
  background: rgba(46,204,113,0.12);
  border: 1px solid rgba(46,204,113,0.3);
  color: var(--success);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}
.dl-download-btn:hover { background: rgba(46,204,113,0.22); }

/* dismiss button */
.dl-item-close {
  flex-shrink: 0;
  background: none; border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s, color 0.15s;
}
.dl-item.queued .dl-item-close,
.dl-item.ready .dl-item-close,
.dl-item.done .dl-item-close,
.dl-item.error .dl-item-close { opacity: 0.5; pointer-events: auto; }
.dl-item-close:hover { opacity: 1; color: var(--text); }

/* -- FOOTER -- */
footer {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

/* -- FADE-IN -- */
.card, header { animation: fadeUp 0.5s ease both; }
header { animation-delay: 0s; }
.card  { animation-delay: 0.1s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}