/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0d0d0d;
  --bg-panel:   #141414;
  --bg-raised:  #1a1a1a;
  --border:     #2a2a2a;
  --border-hi:  #3a3a3a;
  --amber:      #f5a623;
  --amber-dim:  #a86e10;
  --amber-glow: rgba(245,166,35,0.12);
  --text:       #e8e0d0;
  --text-muted: #6b6560;
  --text-dim:   #9a9088;
  --green:      #4caf7d;
  --red:        #e05c5c;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-ui:    'DM Mono', 'JetBrains Mono', monospace;
  --radius:     2px;
  --transition: 150ms ease;
}

html { font-size: 15px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
}

/* ── App Shell ────────────────────────────────────────────── */
#app {
  width: 100%;
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ── Header ───────────────────────────────────────────────── */
header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .35rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .25em;
  color: var(--amber);
  line-height: 1;
}
.logo-bracket { color: var(--text-muted); font-weight: 400; }

h1 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text);
}

.subtitle {
  font-size: .75rem;
  color: var(--text-muted);
  letter-spacing: .03em;
}

/* ── Drop Zone ────────────────────────────────────────────── */
#drop-zone {
  border: 1px dashed var(--border-hi);
  border-radius: var(--radius);
  background: var(--bg-panel);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  outline: none;
}
#drop-zone:focus-visible { box-shadow: 0 0 0 2px var(--amber); }
#drop-zone.dragover {
  border-color: var(--amber);
  background: var(--amber-glow);
  box-shadow: 0 0 24px var(--amber-glow);
}

.drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3.5rem 2rem;
  gap: .6rem;
  pointer-events: none;
}
#drop-zone label.btn-select { pointer-events: all; }

.drop-icon {
  width: 52px;
  height: 52px;
  color: var(--amber-dim);
  margin-bottom: .5rem;
}
.drop-icon svg { width: 100%; height: 100%; }

.drop-label {
  font-size: 1rem;
  color: var(--text-dim);
  letter-spacing: .02em;
}
.drop-label strong { color: var(--text); }

.drop-sub {
  font-size: .75rem;
  color: var(--text-muted);
}

#file-input { display: none; }

.btn-select {
  display: inline-block;
  padding: .45rem 1.2rem;
  background: transparent;
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition);
  margin-top: .4rem;
  /* reset <button> UA styles */
  appearance: none;
  -webkit-appearance: none;
  line-height: normal;
}
.btn-select:hover {
  background: var(--amber-glow);
  border-color: var(--amber);
}

/* ── Status Area ──────────────────────────────────────────── */
#status-area {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

#status-bar {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .8rem;
  color: var(--text-dim);
  letter-spacing: .04em;
}

.status-icon {
  color: var(--amber);
  animation: spin 1.5s linear infinite;
  display: inline-block;
  font-size: 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-icon.done { animation: none; color: var(--green); }
.status-icon.error { animation: none; color: var(--red); }

#progress-track {
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}
#progress-fill {
  height: 100%;
  width: 0%;
  background: var(--amber);
  transition: width .3s ease;
}

/* ── Track Selector ───────────────────────────────────────── */
#track-selector {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .78rem;
  color: var(--text-dim);
  letter-spacing: .04em;
}

#track-select {
  flex: 1;
  background: var(--bg-raised);
  border: 1px solid var(--border-hi);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: .35rem .6rem;
  border-radius: var(--radius);
  outline: none;
  cursor: pointer;
}
#track-select:focus { border-color: var(--amber); }

/* ── Results ──────────────────────────────────────────────── */
#results { display: flex; flex-direction: column; gap: .75rem; }

.results-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

.toolbar-left { display: flex; align-items: center; gap: .75rem; }

.file-label {
  font-size: .78rem;
  color: var(--text-dim);
  letter-spacing: .03em;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  background: var(--bg-raised);
  border: 1px solid var(--border-hi);
  color: var(--amber);
  font-size: .68rem;
  letter-spacing: .05em;
  padding: .15rem .5rem;
  border-radius: 1px;
}

.format-toggle {
  display: flex;
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  overflow: hidden;
}

.fmt-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .35rem .9rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.fmt-btn:hover { background: var(--bg-raised); color: var(--text); }
.fmt-btn.active {
  background: var(--amber-glow);
  color: var(--amber);
  border-left: 1px solid var(--border-hi);
}
.fmt-btn:first-child.active { border-left: none; }

/* ── Output Panes ─────────────────────────────────────────── */
#output-wrapper { position: relative; }

.output-pane {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  max-height: 480px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-hi) transparent;
}
.output-pane::-webkit-scrollbar { width: 5px; }
.output-pane::-webkit-scrollbar-track { background: transparent; }
.output-pane::-webkit-scrollbar-thumb { background: var(--border-hi); }

#output-text {
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.75;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Table output */
#output-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: .8rem;
}
#output-table-wrap th {
  text-align: left;
  padding: .4rem .75rem;
  color: var(--amber);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-hi);
}
#output-table-wrap td {
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.65;
  color: var(--text);
}
#output-table-wrap td:first-child {
  color: var(--amber);
  white-space: nowrap;
  width: 72px;
  font-weight: 600;
  letter-spacing: .04em;
}
#output-table-wrap tr:last-child td { border-bottom: none; }
#output-table-wrap tr:hover td { background: var(--bg-raised); }

/* ── Action Bar ───────────────────────────────────────────── */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-top: .5rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem 1rem;
  background: var(--bg-raised);
  border: 1px solid var(--border-hi);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.action-btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.action-btn:hover { border-color: var(--amber); color: var(--amber); }
.action-btn--ghost { border-color: var(--border); color: var(--text-muted); margin-left: auto; }
.action-btn--ghost:hover { border-color: var(--text-muted); color: var(--text); }

.action-btn.copied {
  border-color: var(--green);
  color: var(--green);
}

/* ── Warning Banner ───────────────────────────────────────── */
.warning-banner {
  border: 1px solid var(--amber-dim);
  background: var(--amber-glow);
  color: var(--amber);
  font-size: .78rem;
  padding: .75rem 1rem;
  border-radius: var(--radius);
  line-height: 1.6;
  letter-spacing: .02em;
}

/* ── Utility ──────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Footer ───────────────────────────────────────────────── */
footer {
  margin-top: auto;
  padding-top: 2rem;
  font-size: .7rem;
  color: var(--text-muted);
  letter-spacing: .04em;
  border-top: 1px solid var(--border);
  width: 100%;
  text-align: center;
}