/* ============================================================
   VoxCPM Voice Studio — Dark navy / cyan theme
   ============================================================ */

:root {
  --bg: #060b14;
  --bg-2: #0a1120;
  --panel: #0d1526;
  --panel-2: #101a30;
  --card: #0f1a2e;
  --card-border: #1a2744;
  --border: #1b2844;
  --border-soft: #162036;
  --text: #e6edf7;
  --text-2: #8a97b2;
  --text-3: #5b6a89;
  --cyan: #3fd3f5;
  --cyan-2: #22b8dd;
  --cyan-dim: rgba(63, 211, 245, .12);
  --accent-glow: rgba(63, 211, 245, .35);
  --green: #34d399;
  --red: #f87171;
  --grad: linear-gradient(100deg, #6d28d9, #0ea5e9 48%, #22d3ee);
  --radius: 14px;
  --radius-sm: 10px;
  --my: "Padauk", "Inter", sans-serif;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Padauk", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body {
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(14, 102, 200, .18), transparent 60%),
    radial-gradient(700px 500px at -5% 110%, rgba(34, 211, 238, .10), transparent 55%),
    var(--bg);
}

/* ---------- ambient glows ---------- */
.bg-glow {
  position: fixed; border-radius: 50%; filter: blur(110px);
  pointer-events: none; z-index: 0; opacity: .55;
}
.glow-1 { width: 480px; height: 480px; top: -140px; right: -120px; background: rgba(34, 184, 221, .13); }
.glow-2 { width: 420px; height: 420px; bottom: -160px; left: -140px; background: rgba(109, 40, 217, .14); }

.my-label { font-family: var(--my); font-weight: 400; opacity: .75; font-size: .82em; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(6, 11, 20, .78);
  border-bottom: 1px solid var(--border-soft);
}
.topbar-inner {
  max-width: 1280px; margin: 0 auto; padding: 12px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.brand { display: flex; align-items: center; gap: 13px; min-width: 0; }
.brand-logo {
  width: 40px; height: 40px; border-radius: 11px; flex: none;
  background: var(--grad);
  display: grid; place-items: center;
  color: #fff;
  box-shadow: 0 0 18px rgba(34, 211, 238, .35);
}
.brand-text h1 {
  font-size: 1.08rem; letter-spacing: .12em; font-weight: 800;
  white-space: nowrap;
}
.brand-accent { color: var(--cyan); }
.brand-sub { font-size: .72rem; color: var(--text-3); letter-spacing: .18em; text-transform: uppercase; margin-top: 1px; }
.ai-tag {
  flex: none; font-size: .72rem; font-weight: 700; letter-spacing: .12em;
  padding: 6px 12px; border-radius: 999px;
  background: var(--cyan-dim); color: var(--cyan); border: 1px solid rgba(63, 211, 245, .35);
  white-space: nowrap;
}

/* ---------- layout ---------- */
.app {
  position: relative; z-index: 1;
  max-width: 1280px; margin: 0 auto; padding: 26px 22px 14px;
  display: grid; grid-template-columns: minmax(0, 430px) 1fr; gap: 26px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
}
.controls { padding: 22px; }
.preview { padding: 24px; }

/* ---------- sections ---------- */
.section { padding: 16px 0 4px; }
.section-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.section-head .rule { width: 4px; height: 14px; border-radius: 2px; background: var(--cyan); flex: none; }
.section-head h2 {
  font-size: .78rem; font-weight: 700; letter-spacing: .16em; color: var(--text-2);
  display: flex; align-items: baseline; gap: 7px;
}

/* status */
.status-chip {
  display: flex; align-items: center; gap: 9px;
  background: rgba(248, 250, 252, .04);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 8px 16px; font-size: .82rem; color: var(--cyan);
}
.status-chip.error { color: var(--red); }
.status-chip.ok { color: var(--green); }
.progress-track {
  margin-top: 10px; height: 5px; border-radius: 999px;
  background: var(--border-soft); overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%; border-radius: 999px;
  background: var(--grad);
  animation: indeterminate 1.6s ease-in-out infinite;
}
@keyframes indeterminate {
  0%   { margin-left: 0;   width: 30%; }
  50%  { margin-left: 40%; width: 45%; }
  100% { margin-left: 100%; width: 20%; }
}

/* tabs */
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tab {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 3px;
  color: var(--text-2); cursor: pointer;
  transition: all .2s ease;
}
.tab:hover { border-color: rgba(63, 211, 245, .35); color: var(--text); }
.tab.active {
  border-color: var(--cyan);
  background: var(--cyan-dim);
  color: var(--text);
  box-shadow: 0 0 0 1px var(--cyan), 0 0 22px rgba(63, 211, 245, .18);
}
.tab-icon { font-size: 1.15rem; line-height: 1.2; }
.tab-label { font-size: .85rem; font-weight: 700; }
.tab-sub { font-size: .68rem; color: var(--text-3); font-family: var(--my); }

/* inputs */
textarea, input[type="text"] {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font: inherit; font-size: .9rem;
  resize: vertical;
  transition: border-color .2s, box-shadow .2s;
}
textarea:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(63, 211, 245, .15);
}
textarea::placeholder, input::placeholder { color: var(--text-3); }
.field-hint { font-size: .72rem; color: var(--text-3); margin-top: 7px; }

/* style chips */
.style-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.chip {
  background: var(--card); border: 1px solid var(--border);
  color: var(--text-2); font-size: .74rem; font-weight: 500;
  border-radius: 999px; padding: 6px 12px; cursor: pointer;
  transition: all .15s;
}
.chip:hover { border-color: rgba(63, 211, 245, .4); color: var(--text); }
.chip:active { transform: scale(.97); }

/* dropzone */
.dropzone { display: block; cursor: pointer; }
.dropzone-body, .dz-file {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 18px;
  display: flex; align-items: center; gap: 14px;
  color: var(--text-2);
  transition: all .2s;
}
.dropzone:hover .dropzone-body { border-color: var(--cyan); color: var(--text); }
.dropzone.drag .dropzone-body {
  border-color: var(--cyan); background: var(--cyan-dim);
  box-shadow: 0 0 0 3px rgba(63, 211, 245, .15);
}
.dropzone.has-file .dropzone-body { display: none; }
.dropzone.has-file .dz-file { display: flex; }
.dz-title { font-size: .88rem; font-weight: 600; color: var(--text); }
.dz-title .accent { color: var(--cyan); }
.dz-sub { font-size: .7rem; color: var(--text-3); margin-top: 3px; }
.dz-file { justify-content: space-between; border-style: solid; }
.dz-name { font-size: .82rem; font-weight: 600; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dz-meta { font-size: .7rem; color: var(--text-3); margin-left: 8px; white-space: nowrap; }
.dz-remove {
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  background: rgba(248, 113, 113, .12); border: none;
  color: var(--red); cursor: pointer; font-size: .8rem;
  display: grid; place-items: center;
}
.dz-remove:hover { background: rgba(248, 113, 113, .25); }

/* slider */
.slider-row { margin-bottom: 12px; }
.slider-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 9px; font-size: .82rem; color: var(--text-2); }
.slider-val { color: var(--cyan); font-weight: 700; font-variant-numeric: tabular-nums; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 5px; border-radius: 999px;
  background: var(--border-soft); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 17px; height: 17px; border-radius: 50%;
  background: var(--cyan); border: 3px solid var(--panel);
  box-shadow: 0 0 10px rgba(63, 211, 245, .5);
  cursor: pointer;
}
.slider-ticks { display: flex; justify-content: space-between; font-size: .66rem; color: var(--text-3); margin-top: 6px; }

/* checkboxes / toggles */
.check-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 13px; font-size: .82rem; color: var(--text-2);
  margin-bottom: 8px; cursor: pointer;
  transition: all .15s;
}
.check-row:hover { border-color: rgba(63, 211, 245, .3); }
.check-row input { display: none; }
.check-row input:checked + .toggle i { background: var(--cyan); }
.toggle {
  width: 36px; height: 20px; border-radius: 999px;
  background: var(--border-soft); position: relative; flex: none;
  margin-right: 2px; transition: background .2s;
}
.toggle i {
  position: absolute; top: 2.5px; left: 2.5px;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--text-3); transition: all .2s;
}
.check-row input:checked ~ .toggle i { left: 18.5px; }

/* output card */
.output-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 13px 15px;
  color: var(--text-2);
}
.oc-icon { font-size: 1.3rem; }
.oc-title { font-size: .85rem; font-weight: 600; color: var(--text); }
.oc-sub { font-size: .68rem; color: var(--text-3); margin-top: 2px; }

/* ---------- generate button ---------- */
.generate-btn {
  width: 100%; margin-top: 18px;
  border: none; border-radius: var(--radius);
  background: var(--grad);
  color: #fff;
  font: inherit; font-size: .95rem; font-weight: 700;
  letter-spacing: .06em;
  padding: 15px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  box-shadow: 0 6px 26px rgba(34, 184, 221, .28);
  transition: transform .15s, box-shadow .2s, opacity .2s;
}
.generate-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(34, 184, 221, .4); }
.generate-btn:active { transform: translateY(0); }
.generate-btn:disabled { opacity: .6; cursor: progress; transform: none; }

/* ---------- preview panel ---------- */
.preview-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.preview-head h2 { font-size: .85rem; font-weight: 700; display: flex; align-items: center; gap: 9px; }
.env-chip {
  font-size: .66rem; font-weight: 700; letter-spacing: .12em;
  padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-3);
  background: var(--card);
}
.preview-card {
  background: #000;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  min-height: 340px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 34px 26px;
  position: relative;
  overflow: hidden;
}
.preview-card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px 260px at 50% 30%, rgba(34, 184, 221, .07), transparent 65%);
  pointer-events: none;
}

.empty-state { text-align: center; color: var(--text-3); position: relative; }
.empty-icon { margin: 0 auto 16px; opacity: .45; }
.es-title { font-size: .95rem; font-weight: 600; color: var(--text-2); }
.es-sub { font-size: .75rem; margin-top: 6px; font-family: var(--my); }

/* result */
.result-state { width: 100%; position: relative; display: none; flex-direction: column; gap: 16px; }
.result-state:not([hidden]) { display: flex; }
.wave-viz { display: flex; align-items: center; justify-content: center; gap: 3px; height: 64px; }
.wave-viz .bar {
  width: 4px; border-radius: 3px;
  background: var(--cyan); opacity: .5;
}
.wave-viz.playing .bar { animation: wave 1s ease-in-out infinite; }
@keyframes wave {
  0%, 100% { transform: scaleY(.25); opacity: .35; }
  50%      { transform: scaleY(1);   opacity: .9; }
}

audio {
  width: 100%; height: 44px;
  filter: invert(.86) hue-rotate(165deg);
  border-radius: 8px;
}
.result-meta { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.result-meta span { font-size: .7rem; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
.result-meta span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); opacity: .7; }
.result-actions { display: flex; gap: 10px; }
.dl-btn {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--grad);
  color: #fff; font-weight: 700; font-size: .85rem;
  border-radius: var(--radius-sm); padding: 12px;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(34, 184, 221, .25);
  transition: transform .15s;
}
.dl-btn:hover { transform: translateY(-1px); }
.dl-btn:not([href]) { opacity: .5; pointer-events: none; }
.btn-ghost {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 7px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-2); font: inherit; font-size: .82rem;
  border-radius: var(--radius-sm); padding: 12px; cursor: pointer;
  transition: all .15s;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--text); }

/* info card */
.info-card {
  margin-top: 18px;
  background: var(--card); border: 1px solid var(--border-soft);
  border-radius: var(--radius); padding: 18px 20px;
}
.info-card h3 { font-size: .8rem; font-weight: 700; letter-spacing: .1em; color: var(--text-2); margin-bottom: 8px; }
.info-card p { font-size: .78rem; color: var(--text-3); line-height: 1.65; }
.info-card a { color: var(--cyan); text-decoration: none; border-bottom: 1px dashed rgba(63, 211, 245, .45); }
.steps { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.step { display: flex; align-items: center; gap: 10px; font-size: .76rem; color: var(--text-2); }
.step-n {
  width: 20px; height: 20px; border-radius: 50%; flex: none;
  background: var(--cyan-dim); color: var(--cyan);
  font-size: .66rem; font-weight: 700;
  display: grid; place-items: center;
}

/* footer */
.footer { position: relative; z-index: 1; max-width: 1280px; margin: 22px auto 0; padding: 0 22px 26px; }
.footer-inner {
  border-top: 1px solid var(--border-soft);
  padding-top: 14px;
  display: flex; flex-wrap: wrap; gap: 4px 18px; justify-content: space-between;
  font-size: .7rem; color: var(--text-3);
}
.footer a { color: var(--cyan); text-decoration: none; }

/* toast */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(24px);
  background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); font-size: .82rem; font-weight: 500;
  padding: 11px 20px; border-radius: 999px;
  opacity: 0; pointer-events: none;
  transition: all .25s; z-index: 50;
  box-shadow: 0 10px 36px rgba(0, 0, 0, .45);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: rgba(248, 113, 113, .5); color: var(--red); }

/* spin */
.spin { animation: spin .9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; padding: 18px 14px 12px; gap: 18px; }
  .brand-text h1 { font-size: .95rem; }
  .brand-tag { display: none; }
  .preview-card { min-height: 300px; }
}
@media (max-width: 420px) {
  .topbar-inner { padding: 10px 14px; }
  .brand-sub { display: none; }
  .controls, .preview { padding: 18px; }
  .result-actions { flex-direction: column; }
}