:root {
  --bg: #f5f5f7;
  --card-bg: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --danger: #ff3b30;
  --warn-bg: #fff4e5;
  --warn-text: #8a5a00;
  --border: #d2d2d7;
  --field-bg: #f5f5f7;
  --radius-l: 18px;
  --radius-m: 12px;
  --radius-s: 9px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04), 0 6px 20px rgba(0,0,0,.05);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card-bg: #1c1c1e;
    --text-primary: #f5f5f7;
    --text-secondary: #98989d;
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --warn-bg: #3a2c10;
    --warn-text: #ffcf70;
    --border: #38383a;
    --field-bg: #2c2c2e;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.5);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
h1, h2 { font-weight: 600; letter-spacing: -0.01em; }
code { font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: .9em; }

/* ── Auth ─────────────────────────────────────────────── */
.auth-wrap { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.auth-card {
  width: 100%; max-width: 360px; background: var(--card-bg);
  border-radius: var(--radius-l); padding: 40px 32px; text-align: center;
  box-shadow: var(--shadow-sm);
}
.auth-logo { color: var(--accent); margin-bottom: 14px; }
.auth-card h1 { font-size: 22px; margin: 0 0 4px; }
.auth-sub { color: var(--text-secondary); margin: 0 0 24px; font-size: 15px; }
.auth-form { display: grid; gap: 12px; }

input[type=password], input[type=text], textarea, select {
  font-family: inherit; font-size: 16px; color: var(--text-primary);
  background: var(--field-bg); border: 1px solid transparent;
  border-radius: var(--radius-s); padding: 13px 14px; width: 100%;
  transition: border-color .15s, background .15s;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--accent); background: var(--card-bg);
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 16px; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); background: var(--card-bg); color: var(--text-primary);
  border-radius: 980px; padding: 11px 22px; transition: background .15s, opacity .15s, transform .05s;
}
.btn:active { transform: scale(.98); }
.btn:hover { background: var(--field-bg); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-block { width: 100%; padding: 13px; }
.btn-small { padding: 7px 14px; font-size: 14px; }
.btn[disabled] { opacity: .5; cursor: default; pointer-events: none; }
.icon-btn {
  display: inline-grid; place-items: center; width: 38px; height: 38px;
  border-radius: 50%; color: var(--text-primary); text-decoration: none;
}
.icon-btn:hover { background: var(--field-bg); }

/* ── Alerts ───────────────────────────────────────────── */
.alert {
  background: rgba(255,59,48,.1); color: var(--danger);
  border-radius: var(--radius-s); padding: 10px 14px; font-size: 14px; margin-bottom: 12px;
}
.alert-warn { background: var(--warn-bg); color: var(--warn-text); }
.alert-warn code { background: rgba(0,0,0,.06); padding: 1px 5px; border-radius: 5px; }

/* ── Layout ───────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 17px; }
.brand svg { color: var(--accent); }

.page { max-width: 1040px; margin: 0 auto; padding: 24px 20px 64px; }
.layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 820px) { .layout { grid-template-columns: 1fr; } }

.card {
  background: var(--card-bg); border-radius: var(--radius-l);
  padding: 22px; box-shadow: var(--shadow-sm); margin-bottom: 18px;
}
.card h2 { font-size: 16px; margin: 0 0 16px; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.card-head h2 { margin: 0; }
.usage { font-size: 13px; color: var(--text-secondary); }

.textarea { resize: vertical; min-height: 120px; line-height: 1.55; }
.mono { font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 13px; }
.text-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 10px; font-size: 13px; color: var(--text-secondary);
}
.raw-toggle { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.raw-toggle input { width: auto; }

/* ── Fields ───────────────────────────────────────────── */
.field { margin-bottom: 16px; }
.field > label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px; color: var(--text-secondary); margin-bottom: 7px; font-weight: 500;
}
.field output { color: var(--text-primary); font-variant-numeric: tabular-nums; }
.hint { font-size: 12.5px; color: var(--text-secondary); margin: 7px 0 0; }

.select-wrap { position: relative; }
.select-wrap select { appearance: none; padding-right: 38px; cursor: pointer; }
.chev { position: absolute; right: 13px; top: 50%; transform: translateY(-50%);
        pointer-events: none; color: var(--text-secondary); }

input[type=range] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 4px;
  background: var(--border); border-radius: 3px; padding: 0; margin: 8px 0;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: .5px solid rgba(0,0,0,.04);
  box-shadow: 0 1px 4px rgba(0,0,0,.25); cursor: pointer;
}
input[type=range]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%; background: #fff; border: none;
  box-shadow: 0 1px 4px rgba(0,0,0,.25); cursor: pointer;
}

.actions { display: flex; gap: 10px; margin-top: 22px; }
.actions .btn { flex: 1; }

/* ── Result / recent ──────────────────────────────────── */
.player { width: 100%; margin-bottom: 6px; }
.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-list li {
  display: flex; align-items: center; gap: 12px; padding: 11px 0;
  border-top: 1px solid var(--border); font-size: 14px;
}
.recent-list li:first-child { border-top: none; }
.recent-list .r-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.recent-list .r-meta { color: var(--text-secondary); font-size: 12.5px; white-space: nowrap; }
.recent-list audio { height: 32px; }
.r-delete { color: var(--text-secondary); flex-shrink: 0; }
.r-delete:hover { color: var(--danger); background: rgba(255,59,48,.08); }

.hidden { display: none !important; }

/* ── Toast ────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px);
  background: #1d1d1f; color: #fff; padding: 12px 20px; border-radius: 12px;
  font-size: 14px; box-shadow: 0 8px 30px rgba(0,0,0,.3); opacity: 0;
  transition: opacity .2s, transform .2s; pointer-events: none; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }
.spinner {
  width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff; border-radius: 50%; display: inline-block;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }