:root {
  color-scheme: dark light;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-light: #c7d2fe;
  --accent-ink: #4f46e5;
  --text-primary: #e0e0f0;
  --text-secondary: #8888a0;
  --text-muted: #6a6a90;
  --card-radius: 18px;
  --card-dark-bg: rgba(99,102,241,.08);
  --card-dark-border: rgba(99,102,241,.15);
  --card-dark-bg-hover: rgba(99,102,241,.16);
  --html-bg: #0f0f1a;
  --bg-gradient: linear-gradient(165deg,#0f0f1a 0%,#1a1a2e 40%,#16213e 100%);
  --topbar-bg: rgba(15,15,26,.85);
  --topbar-border: rgba(99,102,241,.12);
  --input-bg: rgba(255,255,255,.04);
  --input-border: rgba(255,255,255,.08);
  --title-gradient: linear-gradient(135deg,#c7d2fe 0%,#818cf8 50%,#6366f1 100%);
}
[data-theme="light"] {
  color-scheme: light;
  --accent-primary: #4f46e5;
  --accent-secondary: #6366f1;
  --accent-light: #4338ca;
  --text-primary: #0f0f1a;
  --text-secondary: #3f3f56;
  --text-muted: #6c6c84;
  --card-dark-bg: rgba(255,255,255,0.85);
  --card-dark-border: rgba(99,102,241,.32);
  --card-dark-bg-hover: rgba(255,255,255,1);
  --html-bg: #eef0fa;
  --bg-gradient: linear-gradient(165deg,#eef0fa 0%,#e0e4f5 40%,#cdd5ec 100%);
  --topbar-bg: rgba(255,255,255,0.92);
  --topbar-border: rgba(99,102,241,.32);
  --input-bg: rgba(255,255,255,1);
  --input-border: rgba(99,102,241,.35);
  --title-gradient: linear-gradient(135deg,#4f46e5 0%,#4338ca 50%,#312e81 100%);
}

/* Light theme дополнительные тени для контраста */
[data-theme="light"] .field {
  box-shadow: 0 1px 3px rgba(31,35,80,.06);
}
[data-theme="light"] .preview {
  box-shadow: 0 1px 3px rgba(31,35,80,.06);
}
[data-theme="light"] .presets {
  box-shadow: 0 1px 3px rgba(31,35,80,.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Topbar (как в pii-mask) */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--topbar-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--topbar-border);
}
.topbar-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { font-weight: 700; font-size: 16px; color: var(--text-primary); text-decoration: none; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 36px; height: 36px;
  border: 1px solid var(--card-dark-border);
  background: var(--card-dark-bg);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text-primary);
}
.theme-toggle svg { width: 16px; height: 16px; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* Container */
.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }

.micro-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.2em; color: var(--accent-secondary);
  text-transform: uppercase; margin-bottom: 18px;
  display: block;
}

h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800; line-height: 1.1;
  letter-spacing: -0.025em;
  background: var(--title-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
}
h3 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin: 24px 0 10px; }

.lede {
  font-size: 15px; color: var(--text-secondary);
  line-height: 1.55; margin-bottom: 28px;
  max-width: 760px;
}

/* Presets */
.presets {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 14px;
  margin-bottom: 24px;
}
.presets-label { font-size: 12px; color: var(--text-secondary); font-weight: 600; letter-spacing: 0.05em; margin-right: 4px; }
.preset-btn {
  background: var(--input-bg);
  border: 1px solid var(--card-dark-border);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.15s;
}
.preset-btn:hover {
  background: var(--card-dark-bg-hover);
  border-color: var(--accent-primary);
  color: var(--accent-light);
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

/* Form column */
.form-col { display: flex; flex-direction: column; gap: 14px; }

.field {
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 14px;
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 10px;
}
.field > label {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.req { color: var(--accent-primary); }
.opt { color: var(--text-muted); font-weight: 400; font-size: 11px; }

textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
}
textarea::placeholder { color: var(--text-muted); }
textarea:focus { outline: none; border-color: var(--accent-primary); }

.opts { display: flex; flex-direction: column; gap: 4px; }
.opts-row { flex-direction: row; flex-wrap: wrap; gap: 10px; }

.opt-radio, .opt-check {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 8px;
  border-radius: 8px;
  transition: all 0.1s;
}
.opt-radio:hover, .opt-check:hover {
  background: var(--card-dark-bg-hover);
  color: var(--text-primary);
}
.opt-radio input, .opt-check input {
  cursor: pointer;
  flex-shrink: 0;
  accent-color: var(--accent-primary);
}
.opt-row input[type="text"] {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 8px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
}

/* Buttons */
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  padding: 12px 22px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 6px 24px rgba(99,102,241,.35);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 28px rgba(99,102,241,.45); }
.btn-primary.copied { background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%); box-shadow: 0 6px 24px rgba(34,197,94,.35); }
.btn {
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 10px 16px;
  border: 1px solid var(--card-dark-border);
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { color: var(--accent-light); border-color: var(--accent-primary); }

/* Preview column */
.preview-col { position: relative; }
.preview-sticky {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.platform-tabs {
  display: flex;
  gap: 4px;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 12px;
  padding: 4px;
}
.platform-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
}
.platform-tab:hover { color: var(--text-primary); }
.platform-tab.active {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(99,102,241,.35);
}

.preview {
  background: var(--input-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 14px;
  padding: 18px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
  margin: 0;
  min-height: 420px;
  max-height: 620px;
  overflow-y: auto;
}

.preview-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.preview-length {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* Info */
.info-block {
  margin-top: 48px;
  padding: 28px;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 14px;
  font-size: 14px;
  color: var(--text-secondary);
}
.info-block h3 { color: var(--text-primary); }
.info-block ol, .info-block ul { padding-left: 24px; }
.info-block li { margin-bottom: 6px; }
.info-block .hint { color: var(--text-muted); font-size: 13px; }
.info-block b { color: var(--text-primary); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--html-bg);
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
  z-index: 200;
  max-width: 90vw;
}

/* Mobile */
@media (max-width: 900px) {
  .preview-sticky { position: static; }
}
@media (max-width: 600px) {
  .container { padding: 20px 14px 48px; }
}

.preview-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.preview-actions .btn:disabled { opacity: 0.4; cursor: not-allowed; }
.preview-actions .btn:disabled:hover { color: var(--text-secondary); border-color: var(--card-dark-border); }

@media (max-width: 700px) {
  .preview-footer { flex-direction: column; align-items: stretch; gap: 10px; }
  .preview-actions { justify-content: space-between; }
}

/* Hints под лейблами */
.field > .hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  margin: -4px 0 4px;
}

/* Валидация: подсветка пустой темы */
.field.invalid {
  border-color: rgba(239,68,68,0.5);
  background: rgba(239,68,68,0.04);
}
.field.invalid textarea { border-color: rgba(239,68,68,0.4); }
.field.invalid .req-error {
  display: block;
  font-size: 12px;
  color: #ef4444;
  margin-top: 4px;
}
.req-error { display: none; }

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* Подсветка плейсхолдеров [тема] и <укажи тему> в превью */
.preview .placeholder-mark {
  background: rgba(245,158,11,0.18);
  color: #f59e0b;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 600;
}

/* Адаптация под 7 платформ — компактные табы со скроллом на мобайле */
.platform-tabs {
  overflow-x: auto;
  scrollbar-width: thin;
}
.platform-tab {
  flex: 0 0 auto;
  min-width: 0;
  padding: 8px 10px;
  font-size: 12px;
  white-space: nowrap;
}
@media (min-width: 901px) {
  .platform-tab { padding: 8px 14px; font-size: 13px; }
}

/* Language switcher */
.lang-switch {
  display: inline-flex;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 10px;
  padding: 3px;
}
.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 5px 10px;
  border-radius: 7px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.04em;
}
.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: white;
}

/* Preset groups */
.presets {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-dark-border);
  border-radius: 14px;
  margin-bottom: 24px;
}
.presets-group { display: flex; flex-direction: column; gap: 8px; }
.presets-group .presets-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-secondary);
  margin: 0;
}
.presets-row { display: flex; flex-wrap: wrap; gap: 8px; }

/* Активный пресет */
.preset-btn.active {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: white;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px rgba(99,102,241,.35);
}
.preset-btn.active:hover {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: white;
  transform: translateY(-1px);
}

/* 4. Mobile-friendly preview footer */
@media (max-width: 700px) {
  .preview-footer { flex-direction: column; align-items: stretch; gap: 10px; }
  .preview-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .preview-actions .btn-primary {
    grid-column: 1 / -1;
    padding: 14px;
    font-size: 15px;
  }
}

/* Placeholder editor */
.placeholder-editor {
  background: rgba(245,158,11,0.10);
  border: 1px solid rgba(245,158,11,0.35);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ph-editor-label {
  font-size: 12px;
  font-weight: 600;
  color: #f59e0b;
  letter-spacing: 0.02em;
}
.ph-editor-inputs {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ph-editor-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.ph-editor-row .ph-key {
  flex: 0 0 auto;
  background: rgba(245,158,11,0.18);
  color: #f59e0b;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 12px;
}
.ph-editor-row .ph-arrow { color: var(--text-muted); }
.ph-editor-row input {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 6px 10px;
  font-family: inherit;
  font-size: 13px;
}
.ph-editor-row input:focus { outline: none; border-color: var(--accent-primary); }


/* mobile topbar tighter */
@media (max-width: 600px) {
  .topbar-inner { padding: 10px 14px; }
  .brand { font-size: 15px; }
  .topbar-actions { gap: 6px; }
  .lang-switch { padding: 2px; border-radius: 8px; }
  .lang-btn { padding: 4px 10px; font-size: 13px; }
  .container { padding: 20px 14px 60px; }
  .presets-row { gap: 6px; }
  .preset-btn { padding: 8px 12px; font-size: 13px; }
}


/* fix mobile overflow deep-research */
@media (max-width: 900px) {
  html, body { overflow-x: hidden; max-width: 100vw; }
  .container { max-width: 100%; }
  .layout, .form-col, .field, .preview-col { min-width: 0; max-width: 100%; }
  textarea, input, select { min-width: 0 !important; max-width: 100%; box-sizing: border-box; width: 100%; }
  .field > * { max-width: 100%; box-sizing: border-box; }
  .preset-btn, .platform-tab { max-width: 100%; }
  .ph-editor-row { flex-wrap: wrap; }
  .ph-editor-row input { min-width: 0 !important; }
  .presets-row { flex-wrap: wrap; }
  pre, code { max-width: 100%; overflow-x: auto; }
}