/* pexp tool site. One stylesheet, global class names, no framework.
   Theme tokens are the main site's, so the two sites look related without
   sharing any code. */

:root {
  --primary: #ff9900;
  --primary-hover: #ffa31a;
  --bg: #000000;
  --surface: #131313;
  --surface-2: #1b1b1b;
  --input-bg: #282828;
  --text: #ffffff;
  --text-dim: #999999;
  --border: #333333;
  --error: #ef4444;
  --ok: #22c55e;
  --radius: 12px;
}

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

html, body { min-height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }

/* ---------- header ---------- */

.site-header {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text);
  margin-right: 12px;
}
.logo span { color: var(--primary); }

.tabs { display: flex; gap: 4px; margin-left: auto; }

.tab {
  padding: 7px 15px;
  border-radius: 20px;
  color: var(--text-dim);
  font-size: 14px;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}
.tab:hover { color: var(--text); background: #222; }
.tab.active { color: #000; background: var(--primary); font-weight: 600; }

/* ---------- layout ---------- */

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.lede { margin-bottom: 26px; }
.lede h1 { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 6px; }
.lede p { color: var(--text-dim); font-size: 14px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 20px;
}

.step-label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.step-label .num {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--primary);
  color: #000;
  font-size: 12px;
  display: grid;
  place-items: center;
  flex: none;
}

.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }

label.caption {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 7px;
}
label.caption .optional { opacity: 0.65; }

textarea, input[type="text"], select {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  padding: 11px 13px;
  outline: none;
  transition: border-color 0.15s ease;
}
textarea:focus, input[type="text"]:focus, select:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 92px; }
select { cursor: pointer; }

.hint { font-size: 12px; color: var(--text-dim); margin-top: 6px; }
.hint.warn { color: #f5c542; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 150px; }

/* ---------- buttons ---------- */

button {
  font-family: inherit;
  font-size: 15px;
  cursor: pointer;
  border: none;
  border-radius: 25px;
  transition: all 0.2s ease;
  touch-action: manipulation;
}
button:disabled { opacity: 0.55; cursor: not-allowed; }

.btn {
  padding: 12px 26px;
  background: var(--primary);
  color: #000;
  font-weight: 600;
}
.btn:hover:not(:disabled) { background: var(--primary-hover); transform: scale(1.02); }
.btn:active:not(:disabled) { transform: scale(0.98); }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 11px 22px;
}
.btn-secondary:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }

.btn-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 18px; }

/* ---------- upload ---------- */

.drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.drop:hover, .drop.over { border-color: var(--primary); background: rgba(255, 153, 0, 0.04); }
.drop .plus { font-size: 26px; color: var(--primary); line-height: 1; }
.drop .main-text { margin-top: 8px; font-size: 14px; }
.drop .sub { margin-top: 5px; font-size: 12px; color: var(--text-dim); }

.picked {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.picked .icon { font-size: 20px; flex: none; }
.picked .meta { flex: 1; min-width: 0; }
.picked .name {
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.picked .sub { font-size: 12px; color: var(--text-dim); margin-top: 2px; }
.picked audio { width: 100%; margin-top: 8px; height: 34px; }
.icon-btn {
  background: transparent;
  color: var(--text-dim);
  font-size: 17px;
  padding: 4px 8px;
  border-radius: 6px;
  flex: none;
}
.icon-btn:hover { color: var(--error); background: #222; }

/* ---------- output ---------- */

.result { margin-top: 20px; }
.result img {
  max-width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}

.placeholder {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  min-height: 240px;
  display: grid;
  place-items: center;
  color: var(--text-dim);
  font-size: 14px;
  padding: 30px;
  text-align: center;
}

/* ---------- playback ---------- */

.playbar {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-top: 18px;
}
.playbar .top { display: flex; align-items: center; gap: 12px; }

.speaker {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--input-bg);
  display: grid;
  place-items: center;
  flex: none;
}
.speaker svg { display: block; }
.speaker.playing .arc { animation: arc-pulse 0.9s ease-in-out infinite; }
.speaker.playing .arc-2 { animation-delay: 0.17s; }
.speaker.playing .arc-3 { animation-delay: 0.34s; }
@keyframes arc-pulse {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}

.bar-track {
  flex: 1;
  height: 6px;
  background: var(--input-bg);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.1s linear;
}
.time {
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--text-dim);
  min-width: 74px;
  text-align: right;
  flex: none;
}
.playbar .status { font-size: 13px; color: var(--text-dim); margin-top: 10px; }

/* ---------- messages ---------- */

.msg {
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 14px;
  margin-top: 16px;
}
.msg.error { background: rgba(239, 68, 68, 0.12); border: 1px solid rgba(239, 68, 68, 0.4); color: #fca5a5; }
.msg.info { background: rgba(255, 153, 0, 0.1); border: 1px solid rgba(255, 153, 0, 0.35); color: #fbbf24; }

.spinner {
  width: 15px; height: 15px;
  border: 2px solid rgba(0, 0, 0, 0.25);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  vertical-align: -2px;
  margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.skeleton {
  border-radius: var(--radius);
  background: linear-gradient(100deg, var(--surface-2) 30%, #232323 50%, var(--surface-2) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.4s infinite linear;
  min-height: 240px;
}
@keyframes shimmer { to { background-position: -220% 0; } }

@media (max-width: 640px) {
  main { padding: 22px 14px 60px; }
  .lede h1 { font-size: 21px; }
  .panel { padding: 17px; }
  .logo { font-size: 17px; }
}