/* Анализ сигналов ИИ-текста — vanilla CSS, светлая + тёмная тема.
   Вся палитра в переменных; уровни: none — нейтральный, weak — жёлтый,
   notable — оранжевый, strong — красный, too_short — серый пунктир. */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef0f3;
  --text: #1d2129;
  --muted: #667085;
  --border: #d8dde4;
  --accent: #2f6fed;
  --accent-text: #ffffff;

  --level-none-bg: transparent;
  --level-none-fg: #667085;
  --level-none-border: #d8dde4;

  --level-weak-bg: #fdf6d8;
  --level-weak-fg: #8a6d00;
  --level-weak-border: #e8c94a;

  --level-notable-bg: #ffe9d6;
  --level-notable-fg: #a34e00;
  --level-notable-border: #f0a35c;

  --level-strong-bg: #ffdfdc;
  --level-strong-fg: #b3261e;
  --level-strong-border: #e8837c;

  --level-too_short-bg: transparent;
  --level-too_short-fg: #8a919c;
  --level-too_short-border: #aab1ba;

  --mark-bg: rgba(240, 163, 92, 0.35);
  --mark-line: #d97b2b;

  --tier-a-bg: #b3261e;
  --tier-b-bg: #a34e00;
  --tier-c-bg: #667085;
  --tier-fg: #ffffff;

  --human-bg: #e5f4e8;
  --human-border: #7cc48c;
  --human-fg: #1e6b34;

  --error-bg: #ffdfdc;
  --error-border: #e8837c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1d2026;
    --surface-2: #262a31;
    --text: #e6e8eb;
    --muted: #9aa2ad;
    --border: #363b44;
    --accent: #5b8def;
    --accent-text: #0d1117;

    --level-none-fg: #9aa2ad;
    --level-none-border: #363b44;

    --level-weak-bg: rgba(232, 201, 74, 0.14);
    --level-weak-fg: #e3c65a;
    --level-weak-border: #97822e;

    --level-notable-bg: rgba(240, 163, 92, 0.16);
    --level-notable-fg: #f0a35c;
    --level-notable-border: #9c6a34;

    --level-strong-bg: rgba(232, 131, 124, 0.16);
    --level-strong-fg: #ef8b84;
    --level-strong-border: #9c453f;

    --level-too_short-fg: #7c828c;
    --level-too_short-border: #565c66;

    --mark-bg: rgba(240, 163, 92, 0.28);
    --mark-line: #c47a3a;

    --tier-a-bg: #8c2f29;
    --tier-b-bg: #7d4a19;
    --tier-c-bg: #4a515c;
    --tier-fg: #f2f3f5;

    --human-bg: rgba(124, 196, 140, 0.14);
    --human-border: #3f7a4f;
    --human-fg: #8ecf9d;

    --error-bg: rgba(232, 131, 124, 0.16);
    --error-border: #9c453f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.wrap {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.site-header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 42rem;
}

/* ---------- Форма ---------- */

.analyze-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.mode-radio {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
}

.mode-tabs label {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  font-size: 0.92rem;
}

.mode-tabs label:hover { border-color: var(--accent); color: var(--text); }

#mode-text:checked  ~ .mode-tabs label[for="mode-text"],
#mode-url:checked   ~ .mode-tabs label[for="mode-url"],
#mode-file:checked  ~ .mode-tabs label[for="mode-file"],
#mode-gdocs:checked ~ .mode-tabs label[for="mode-gdocs"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.mode-radio:focus-visible ~ .mode-tabs label {
  outline: none;
}

#mode-text:focus-visible  ~ .mode-tabs label[for="mode-text"],
#mode-url:focus-visible   ~ .mode-tabs label[for="mode-url"],
#mode-file:focus-visible  ~ .mode-tabs label[for="mode-file"],
#mode-gdocs:focus-visible ~ .mode-tabs label[for="mode-gdocs"] {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.panel { display: none; }

#mode-text:checked  ~ .panel-text,
#mode-url:checked   ~ .panel-url,
#mode-file:checked  ~ .panel-file,
#mode-gdocs:checked ~ .panel-gdocs { display: block; }

textarea,
input[type="url"],
input[type="file"] {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}

textarea {
  resize: vertical;
  field-sizing: content;      /* авторасширение по содержимому (CSS) */
  min-height: 11rem;
  max-height: 60vh;
}

textarea:focus,
input[type="url"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.hint {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-top: 0.9rem;
}

button[type="submit"] {
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.4rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button[type="submit"]:hover { filter: brightness(1.08); }

/* Индикатор загрузки HTMX */
.htmx-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  opacity: 0;
  transition: opacity 200ms ease-in;
  color: var(--muted);
}
.htmx-request .htmx-indicator { opacity: 1; }
.htmx-request.htmx-indicator { opacity: 1; }

.spinner {
  width: 0.9rem;
  height: 0.9rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Результат ---------- */

#result { margin-top: 1.5rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.error-card {
  background: var(--error-bg);
  border-color: var(--error-border);
}

.error-card h2 { margin: 0 0 0.4rem; font-size: 1.1rem; }
.error-card p { margin: 0; }

.doc-head { margin-bottom: 0.75rem; }

.level-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  border: 1px solid;
  font-weight: 600;
  font-size: 0.95rem;
}

.level-badge.level-none {
  background: var(--level-none-bg);
  color: var(--level-none-fg);
  border-color: var(--level-none-border);
}
.level-badge.level-weak {
  background: var(--level-weak-bg);
  color: var(--level-weak-fg);
  border-color: var(--level-weak-border);
}
.level-badge.level-notable {
  background: var(--level-notable-bg);
  color: var(--level-notable-fg);
  border-color: var(--level-notable-border);
}
.level-badge.level-strong {
  background: var(--level-strong-bg);
  color: var(--level-strong-fg);
  border-color: var(--level-strong-border);
}

.doc-meta {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.gate-note {
  background: var(--surface-2);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.signal-block { margin-top: 1rem; }
.signal-block h3 { margin: 0 0 0.5rem; font-size: 1rem; }

.signal-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.signal-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.5rem;
  padding: 0.5rem 0.65rem;
  background: var(--surface-2);
  border-radius: 8px;
}

.tier {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35rem;
  height: 1.35rem;
  border-radius: 6px;
  color: var(--tier-fg);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: help;
}
.tier-A { background: var(--tier-a-bg); }
.tier-B { background: var(--tier-b-bg); }
.tier-C { background: var(--tier-c-bg); }

.signal-name { font-weight: 600; }
.signal-detail { color: var(--muted); font-size: 0.92rem; flex-basis: 100%; }

.human-block .signal-list li {
  background: var(--human-bg);
  border-left: 3px solid var(--human-border);
}
.human-block h3 { color: var(--human-fg); }

.signal-none { color: var(--muted); }

.notes { margin-top: 1rem; }
.notes h3 { margin: 0 0 0.4rem; font-size: 0.95rem; color: var(--muted); }
.notes ul { margin: 0; padding-left: 1.2rem; color: var(--muted); font-size: 0.92rem; }

/* ---------- Сегменты ---------- */

.segments h2 { font-size: 1.15rem; margin: 1.5rem 0 0.75rem; }

.segment {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 10px;
  background: var(--surface);
  padding: 0.85rem 1rem;
  margin-bottom: 0.9rem;
}

.segment.level-none { border-left-color: var(--level-none-border); }

.segment.level-weak {
  background: var(--level-weak-bg);
  border-left-color: var(--level-weak-border);
}
.segment.level-notable {
  background: var(--level-notable-bg);
  border-left-color: var(--level-notable-border);
}
.segment.level-strong {
  background: var(--level-strong-bg);
  border-left-color: var(--level-strong-border);
}
.segment.level-too_short {
  border-style: dashed;
  border-left-width: 1px;
  border-color: var(--level-too_short-border);
  color: var(--level-too_short-fg);
}

.seg-text {
  margin: 0 0 0.6rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

mark {
  background: var(--mark-bg);
  color: inherit;
  border-bottom: 2px solid var(--mark-line);
  border-radius: 2px;
  padding: 0 1px;
  cursor: help;
}

.seg-details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.88rem;
  user-select: none;
}

.seg-details summary:hover { color: var(--text); }

.seg-details[open] summary { margin-bottom: 0.5rem; }

/* ---------- Дисклеймер ---------- */

.disclaimer {
  margin-top: 1.5rem;
  padding: 0.8rem 1rem;
  border: 1px dashed var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.88rem;
}
.disclaimer p { margin: 0; }

/* ---------- Мобильная вёрстка ---------- */

@media (max-width: 600px) {
  body { font-size: 15px; }
  .wrap { padding: 1.25rem 0.75rem 3rem; }
  .site-header h1 { font-size: 1.3rem; }
  .form-actions { flex-direction: column; align-items: stretch; }
  button[type="submit"] { width: 100%; }
  .htmx-indicator { justify-content: center; }
  .signal-list li { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
}


/* --- футер авторства --- */
.site-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }