:root {
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --bg-soft: #eef0f6;
  --border: #dde1ea;
  --text: #161a22;
  --text-soft: #5b6373;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --accent-contrast: #ffffff;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --ok: #067647;
  --ok-bg: #ecfdf3;
  --warn: #b54708;
  --warn-bg: #fffaeb;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 8px 24px rgba(16, 24, 40, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d12;
    --bg-elev: #14171f;
    --bg-soft: #1b1f2a;
    --border: #262b36;
    --text: #e9ecf3;
    --text-soft: #9aa3b2;
    --accent: #7c73ff;
    --accent-strong: #918bff;
    --accent-contrast: #10121a;
    --danger: #ff9b90;
    --danger-bg: #2a1512;
    --ok: #75e0a7;
    --ok-bg: #10241a;
    --warn: #f5c37a;
    --warn-bg: #2a2110;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --bg: #0b0d12;
  --bg-elev: #14171f;
  --bg-soft: #1b1f2a;
  --border: #262b36;
  --text: #e9ecf3;
  --text-soft: #9aa3b2;
  --accent: #7c73ff;
  --accent-strong: #918bff;
  --accent-contrast: #10121a;
  --danger: #ff9b90;
  --danger-bg: #2a1512;
  --ok: #75e0a7;
  --ok-bg: #10241a;
  --warn: #f5c37a;
  --warn-bg: #2a2110;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  padding-bottom: env(safe-area-inset-bottom);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(10px, env(safe-area-inset-top)) 16px 10px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.brand-mark { font-size: 1.3rem; }
.brand-name { font-size: 1.1rem; letter-spacing: -0.01em; }

.icon-btn {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  cursor: pointer;
}
.icon-btn:hover { background: var(--bg-soft); }
.theme-icon { width: 18px; height: 18px; border-radius: 50%; background: var(--text); box-shadow: inset -5px -4px 0 0 var(--bg-elev); }

.wrap {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.hero h1 {
  margin: 8px 0 10px;
  font-size: clamp(1.7rem, 8vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.hero .sub { margin: 0 0 20px; color: var(--text-soft); font-size: 0.98rem; }

.apps-row {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.app-item {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-soft);
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}

.input-row { display: flex; flex-direction: column; gap: 10px; }

.text-input {
  width: 100%;
  padding: 14px 14px;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
}
.text-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 1rem;
  font-weight: 650;
  cursor: pointer;
  transition: transform 0.04s ease, background 0.15s ease, opacity 0.15s ease;
  min-height: 46px;
}
.btn:active { transform: scale(0.985); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: var(--accent-contrast); }
.btn.primary:hover:not(:disabled) { background: var(--accent-strong); }
.btn.ghost { background: var(--bg-soft); color: var(--text); border-color: var(--border); }
.btn.ghost:hover:not(:disabled) { background: var(--bg-elev); }

.mode-row { margin-top: 12px; text-align: center; }
.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  padding: 6px;
}
.link-btn:hover { text-decoration: underline; }

.batch-area { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.batch-textarea { resize: vertical; font-family: inherit; }

.status {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-size: 0.94rem;
}
.status.error { color: var(--danger); background: var(--danger-bg); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }
.status.ok { color: var(--ok); background: var(--ok-bg); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.status.warn { color: var(--warn); background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }

.results { display: flex; flex-direction: column; gap: 16px; margin-top: 18px; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.thumb-wrap { position: relative; background: var(--bg-soft); aspect-ratio: 16 / 9; }
.thumb { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb.placeholder { object-fit: contain; }
.duration-badge {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
}
.card-body { padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.card-title { margin: 0; font-size: 1.05rem; line-height: 1.3; letter-spacing: -0.01em; }
.card-creator { margin: 0; color: var(--text-soft); font-size: 0.9rem; }
.field-label { font-size: 0.82rem; font-weight: 650; color: var(--text-soft); text-transform: uppercase; letter-spacing: 0.04em; margin-top: 4px; }

.caption-box {
  width: 100%;
  padding: 12px;
  font-size: 0.95rem;
  font-family: inherit;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  resize: vertical;
}
.caption-box:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}
.chip:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.chip:disabled { opacity: 0.55; cursor: wait; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions .btn { flex: 1 1 auto; }
.actions.secondary .btn { font-size: 0.9rem; padding: 10px 12px; }

.card-error { padding: 14px; color: var(--danger); }

.footer { max-width: 640px; margin: 0 auto; padding: 0 16px 32px; color: var(--text-soft); font-size: 0.82rem; text-align: center; }

@media (min-width: 480px) {
  .input-row { flex-direction: row; }
  .input-row .text-input { flex: 1 1 auto; }
  .input-row .btn { flex: 0 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

.hidden { display: none !important; }