/*
 * Bird Spectrogram Viewer — bsv-style.css
 * Aesthetic: field-notebook dark · scientific instrument · forest palette
 * Fonts: Instrument Serif (display) + IBM Plex Mono (data)
 */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* ── Tokens ─────────────────────────────────────────────────── */
:root {
  --bsv-bg0:      #090d0f;
  --bsv-bg1:      #0d1117;
  --bsv-bg2:      #161b22;
  --bsv-bg3:      #1c2330;
  --bsv-line:     #2a3340;
  --bsv-txt:      #d4dce8;
  --bsv-muted:    #6a7a8f;
  --bsv-green:    #3fb950;
  --bsv-green2:   #1e6b30;
  --bsv-sky:      #58a6ff;
  --bsv-amber:    #d29922;
  --bsv-red:      #f85149;
  --bsv-r:        8px;
  --bsv-r-sm:     5px;
  --bsv-font:     'Instrument Serif', Georgia, serif;
  --bsv-mono:     'IBM Plex Mono', 'Courier New', monospace;
}

/* ══════════════════════════════════════════════════════════════
   VIEWER
═══════════════════════════════════════════════════════════════ */
.bsv-viewer {
  font-family: var(--bsv-font);
  background: var(--bsv-bg1);
  border: 1px solid var(--bsv-line);
  border-radius: var(--bsv-r);
  overflow: hidden;
  max-width: 100%;
  margin: 1.6em 0;
  box-shadow: 0 0 0 1px rgba(0,0,0,.5), 0 8px 40px rgba(0,0,0,.6);
}

/* Header */
.bsv-header {
  background: linear-gradient(160deg, #0d1e14 0%, #0a1520 100%);
  border-bottom: 1px solid var(--bsv-line);
  padding: 16px 20px;
}
.bsv-header-inner  { display: flex; align-items: flex-start; }
.bsv-species-wrap  { display: flex; gap: 14px; align-items: flex-start; }
.bsv-bird-glyph {
  color: var(--bsv-green);
  font-size: 1.5rem; line-height: 1;
  opacity: .7; margin-top: 3px; flex-shrink: 0;
}
.bsv-species {
  font-family: var(--bsv-font);
  font-style: italic;
  font-size: 1.3rem;
  color: var(--bsv-txt);
  margin: 0 0 8px;
  font-weight: 400;
  letter-spacing: .01em;
}
.bsv-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.bsv-chip {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--bsv-mono); font-size: .72rem;
  color: var(--bsv-green);
  background: rgba(63,185,80,.08);
  border: 1px solid rgba(63,185,80,.2);
  border-radius: 3px; padding: 2px 8px;
}
.bsv-chip svg { width: 11px; height: 11px; }

/* Spectrogram frame */
.bsv-spec-frame {
  position: relative;
  background: #000;
  border-bottom: 1px solid var(--bsv-line);
}
.bsv-spec-scroll {
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--bsv-line) var(--bsv-bg0);
}
.bsv-spec-inner {
  position: relative;
  display: inline-block;
  min-width: 100%;
}
.bsv-spec-img {
  display: block; width: 100%; height: auto;
  min-height: 120px; max-height: 300px;
  object-fit: cover;
}
.bsv-playhead {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: var(--bsv-sky);
  box-shadow: 0 0 10px var(--bsv-sky), 0 0 3px #fff;
  pointer-events: none; left: 0; opacity: 0;
  transition: left .05s linear, opacity .2s;
  will-change: left;
}
.bsv-playhead.visible { opacity: 1; }

/* Frequency labels */
.bsv-freq-label {
  position: absolute; right: 6px;
  font-family: var(--bsv-mono); font-size: .65rem;
  color: rgba(255,255,255,.35);
  pointer-events: none; line-height: 1;
}
.bsv-freq-hi { top: 4px; }
.bsv-freq-lo { bottom: 6px; }

/* WaveSurfer */
.bsv-wave-frame {
  padding: 6px 12px 4px;
  background: var(--bsv-bg2);
  border-bottom: 1px solid var(--bsv-line);
}
.bsv-wave { min-height: 48px; cursor: pointer; }

/* Controls */
.bsv-controls {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 14px;
  background: var(--bsv-bg1);
  border-bottom: 1px solid var(--bsv-line);
}
.bsv-btn {
  flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--bsv-line);
  background: var(--bsv-bg3); cursor: pointer;
  transition: background .12s, border-color .12s, transform .08s;
  padding: 0;
}
.bsv-btn svg { width: 15px; height: 15px; fill: var(--bsv-txt); }
.bsv-btn-play { border-color: var(--bsv-green2); background: rgba(63,185,80,.1); }
.bsv-btn-play:hover { background: rgba(63,185,80,.2); }
.bsv-btn-play:active { transform: scale(.93); }
.bsv-btn-stop svg { fill: var(--bsv-muted); }
.bsv-btn-stop:hover { border-color: var(--bsv-red); }
.bsv-btn:focus-visible { outline: 2px solid var(--bsv-sky); outline-offset: 2px; }

.bsv-time {
  font-family: var(--bsv-mono); font-size: .78rem;
  color: var(--bsv-muted); white-space: nowrap; flex-shrink: 0;
}
.bsv-ctrl-group {
  display: flex; align-items: center; gap: 6px;
}
.bsv-ctrl-icon { width: 14px; height: 14px; color: var(--bsv-muted); flex-shrink: 0; }
.bsv-ctrl-label {
  font-family: var(--bsv-mono); font-size: .68rem;
  color: var(--bsv-muted); white-space: nowrap;
}
.bsv-range {
  -webkit-appearance: none; appearance: none;
  width: 88px; height: 3px; border-radius: 2px;
  background: var(--bsv-bg3); cursor: pointer; outline: none;
}
.bsv-range::-webkit-slider-thumb {
  -webkit-appearance: none; width: 13px; height: 13px;
  border-radius: 50%; background: var(--bsv-sky);
  border: 2px solid var(--bsv-bg1); cursor: pointer;
}
.bsv-range:focus-visible { outline: 2px solid var(--bsv-sky); outline-offset: 3px; }

/* Notes */
.bsv-notes {
  padding: 10px 18px;
  border-bottom: 1px solid var(--bsv-line);
  font-size: .82rem; color: var(--bsv-muted); line-height: 1.6;
}
.bsv-notes-label {
  font-family: var(--bsv-mono); font-size: .68rem; font-weight: 500;
  color: var(--bsv-amber); text-transform: uppercase; letter-spacing: .07em;
  display: block; margin-bottom: 4px;
}
.bsv-notes p { margin: 0; color: var(--bsv-txt); }

/* Footer shortcode */
.bsv-footer {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 8px 14px;
  background: var(--bsv-bg0);
}
.bsv-sc-badge {
  font-family: var(--bsv-mono); font-size: .7rem;
  color: var(--bsv-sky); background: var(--bsv-bg2);
  border: 1px solid var(--bsv-line);
  border-radius: 3px; padding: 2px 8px;
}
.bsv-sc-copy {
  font-family: var(--bsv-mono); font-size: .7rem;
  color: var(--bsv-muted); background: transparent;
  border: 1px solid var(--bsv-line); border-radius: 3px;
  padding: 2px 10px; cursor: pointer;
  transition: color .12s, border-color .12s;
}
.bsv-sc-copy:hover { color: var(--bsv-txt); border-color: var(--bsv-muted); }

/* ══════════════════════════════════════════════════════════════
   UPLOAD FORM
═══════════════════════════════════════════════════════════════ */
.bsv-form-wrap {
  font-family: var(--bsv-font);
  background: var(--bsv-bg1);
  border: 1px solid var(--bsv-line);
  border-radius: var(--bsv-r);
  overflow: hidden;
  max-width: 680px; margin: 1.6em 0;
  box-shadow: 0 0 0 1px rgba(0,0,0,.5), 0 8px 40px rgba(0,0,0,.6);
}

/* Form header */
.bsv-form-header {
  background: linear-gradient(160deg, #0d1e14 0%, #0a1520 100%);
  border-bottom: 1px solid var(--bsv-line);
  padding: 28px 28px 20px;
  text-align: center;
}
.bsv-form-header-glyph {
  font-size: 2.2rem; color: var(--bsv-green); opacity: .7;
  margin-bottom: 10px; display: block;
  animation: bsv-pulse 3s ease-in-out infinite;
}
@keyframes bsv-pulse {
  0%,100% { opacity: .5; transform: scale(1); }
  50%      { opacity: .9; transform: scale(1.06); }
}
.bsv-form-title {
  font-family: var(--bsv-font); font-size: 1.4rem;
  font-style: italic; font-weight: 400;
  color: var(--bsv-txt); margin: 0 0 6px;
}
.bsv-form-sub {
  font-family: var(--bsv-mono); font-size: .72rem;
  color: var(--bsv-muted); margin: 0;
}

/* Feedback messages */
.bsv-msg {
  display: none; margin: 12px 20px 0;
  padding: 10px 14px; border-radius: var(--bsv-r-sm);
  font-family: var(--bsv-mono); font-size: .82rem;
}
.bsv-msg:not(:empty)  { display: block; }
.bsv-msg--ok  { background: rgba(63,185,80,.1); border: 1px solid rgba(63,185,80,.3); color: var(--bsv-green); }
.bsv-msg--err { background: rgba(248,81,73,.1);  border: 1px solid rgba(248,81,73,.3);  color: var(--bsv-red); }

/* Drop zone */
.bsv-drop {
  margin: 20px;
  border: 1.5px dashed var(--bsv-line);
  border-radius: var(--bsv-r);
  padding: 36px 20px; text-align: center;
  cursor: pointer; position: relative;
  background: var(--bsv-bg2);
  transition: border-color .15s, background .15s;
}
.bsv-drop:hover, .bsv-drop:focus-visible, .bsv-drop.is-over {
  border-color: var(--bsv-green);
  background: rgba(63,185,80,.04);
}
.bsv-drop.has-file  { border-color: var(--bsv-sky); border-style: solid; }
.bsv-drop:focus-visible { outline: 2px solid var(--bsv-sky); outline-offset: 2px; }

.bsv-drop-visual { pointer-events: none; }
.bsv-drop-icon { width: 44px; height: 44px; color: var(--bsv-muted); margin-bottom: 10px; }
.bsv-drop-label {
  display: block; font-family: var(--bsv-font);
  font-size: 1rem; color: var(--bsv-txt); margin-bottom: 4px;
}
.bsv-drop-or  { display: block; font-family: var(--bsv-mono); font-size: .7rem; color: var(--bsv-muted); margin: 4px 0; }
.bsv-drop-cta {
  display: inline-block; font-family: var(--bsv-mono); font-size: .75rem;
  color: var(--bsv-sky); border: 1px solid rgba(88,166,255,.3);
  border-radius: 3px; padding: 3px 12px; margin-top: 2px;
}
.bsv-drop-chosen {
  margin-top: 10px; font-family: var(--bsv-mono); font-size: .78rem;
  color: var(--bsv-sky); min-height: 1em;
}
.bsv-file-hidden {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
  width: 100%; height: 100%;
}

/* Fields grid */
.bsv-fields {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  padding: 0 20px 8px;
}
@media (max-width: 520px) { .bsv-fields { grid-template-columns: 1fr; } }
.bsv-field { display: flex; flex-direction: column; gap: 5px; }
.bsv-field-span { grid-column: 1 / -1; }
.bsv-field label {
  font-family: var(--bsv-mono); font-size: .72rem;
  color: var(--bsv-muted); display: flex; justify-content: space-between;
}
.bsv-note-count { font-size: .68rem; color: var(--bsv-line); }

.bsv-field input, .bsv-field textarea {
  background: var(--bsv-bg3); border: 1px solid var(--bsv-line);
  color: var(--bsv-txt); border-radius: var(--bsv-r-sm);
  padding: 8px 12px; font-family: var(--bsv-font); font-size: .9rem;
  outline: none; transition: border-color .12s;
  -webkit-appearance: none;
}
.bsv-field input:focus, .bsv-field textarea:focus { border-color: var(--bsv-sky); }
.bsv-field textarea { resize: vertical; min-height: 68px; }

/* Submit */
.bsv-submit-row { padding: 14px 20px 20px; }
.bsv-submit {
  width: 100%; padding: 12px;
  background: linear-gradient(150deg, var(--bsv-green2) 0%, #0a2e18 100%);
  border: 1px solid rgba(63,185,80,.4); border-radius: var(--bsv-r-sm);
  color: var(--bsv-txt); font-family: var(--bsv-font);
  font-size: 1rem; font-style: italic; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: filter .15s, transform .08s;
}
.bsv-submit:hover:not(:disabled) { filter: brightness(1.15); transform: translateY(-1px); }
.bsv-submit:disabled { opacity: .5; cursor: not-allowed; }
.bsv-submit-label { display: flex; align-items: center; gap: 8px; }
.bsv-submit-label svg { width: 16px; height: 16px; flex-shrink: 0; }

.bsv-spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.15);
  border-top-color: var(--bsv-txt);
  animation: bsv-spin .6s linear infinite;
  flex-shrink: 0;
}
@keyframes bsv-spin { to { transform: rotate(360deg); } }

/* Result box */
.bsv-result {
  margin: 0 20px 20px;
  background: var(--bsv-bg2); border: 1px solid var(--bsv-line);
  border-radius: var(--bsv-r-sm); padding: 14px 16px;
}
.bsv-result-label {
  font-family: var(--bsv-mono); font-size: .72rem;
  color: var(--bsv-muted); margin: 0 0 6px;
}
.bsv-result-code {
  font-family: var(--bsv-mono); font-size: .78rem;
  color: var(--bsv-sky); display: block; margin-bottom: 8px;
}

/* ── Utilities ─────────────────────────────────────────────── */
.hidden        { display: none !important; }
.bsv-error     { color: var(--bsv-red);   font-size: .9rem; }
.bsv-notice    { color: var(--bsv-amber); font-size: .9rem; }