/* Общие стили — эстетика «Тёплая бумага» (мокап 2). */

:root {
  --bg: #F2EBDC;
  --bg-soft: #E8DFCB;
  --text: #4A3A2A;
  --text-soft: #8B7558;
  --accent: #8B6F47;
  --border: #D4C5A8;
  --paper-line: rgba(139, 117, 88, 0.12);
  --offline: #B8784A;
}

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

html, body {
  height: 100%;
  font-family: 'Crimson Pro', Georgia, serif;
  background: var(--bg);
  background-image:
    repeating-linear-gradient(
      180deg,
      transparent 0,
      transparent 31px,
      var(--paper-line) 32px
    );
  color: var(--text);
  font-size: 19px;
  line-height: 32px;
}

/* На десктопе — split: чат слева, школьная доска справа.
   На мобильном (< 900px) — только чат (доска пока скрыта). */
.app {
  display: grid;
  grid-template-columns: minmax(360px, 0.85fr) minmax(480px, 1.4fr);
  height: 100vh;
  width: 100%;
  margin: 0;
  background: transparent;
}

.chat-pane {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 680px;
  width: 100%;
  margin: 0 auto;
  border-right: 1px dashed var(--border);
}

.board-pane {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--bg);
  overflow: hidden;
}

.board-label {
  position: absolute;
  top: 18px;
  right: 26px;
  font-family: 'Caveat', cursive;
  font-size: 22px;
  color: var(--accent);
  letter-spacing: 0.5px;
  pointer-events: none;
  z-index: 10;
  opacity: 0.7;
}

.board-root {
  flex: 1;
  width: 100%;
  height: 100%;
  position: relative;
}

/* Excalidraw — мягкая интеграция в тёплую бумагу.
   Сама библиотека сидит во view-background-color (#F2EBDC), который мы передаём
   через initialData.appState. Эти переменные тонко правят акценты UI. */
.excalidraw {
  --color-primary: #8B6F47;
  --color-primary-darker: #7a5f3a;
  --color-primary-darkest: #6a522f;
}

/* Мобильный fallback — пока без доски */
@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
  }
  .chat-pane {
    border-right: none;
    max-width: 100%;
  }
  .board-pane {
    display: none;
  }
}

.header {
  padding: 32px 40px 16px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px dashed var(--border);
  flex-shrink: 0;
}

.name {
  font-family: 'Caveat', cursive;
  font-size: 28px;
  color: var(--accent);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.status {
  font-size: 13px;
  color: var(--text-soft);
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  letter-spacing: 0.3px;
}

.status.offline { color: var(--offline); }

.quit {
  font-size: 15px;
  color: var(--text-soft);
  text-decoration: none;
  font-style: italic;
  background: none;
  border: none;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
}

.quit:hover { color: var(--text); text-decoration: underline; }

.header-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}

.mode-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 3px 12px;
  font-family: 'Caveat', cursive;
  font-size: 15px;
  color: var(--text-soft);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.3px;
}

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

.mode-toggle[aria-pressed="true"] {
  background: var(--offline);
  color: #F2EBDC;
  border-color: var(--offline);
}

/* Когда включён режим имитации — мягкая рамка вокруг приложения,
   чтобы Дима видел что он не в реальной сессии */
body.imitation-mode .app {
  box-shadow: inset 0 0 0 2px rgba(184, 120, 74, 0.35);
}

body.imitation-mode::before {
  content: 'режим разработки — имитация';
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: var(--offline);
  color: #F2EBDC;
  font-family: 'Caveat', cursive;
  font-size: 13px;
  padding: 2px 14px;
  border-radius: 0 0 8px 8px;
  letter-spacing: 0.4px;
  z-index: 100;
  pointer-events: none;
}

.chat {
  flex: 1;
  overflow-y: auto;
  padding: 24px 40px;
  scroll-behavior: smooth;
}

.msg {
  margin-bottom: 24px;
  animation: fade-in 0.3s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.who {
  font-family: 'Caveat', cursive;
  font-size: 20px;
  color: var(--accent);
  margin-bottom: 2px;
}

.who.me { color: var(--text-soft); }

.text {
  font-size: 19px;
  line-height: 32px;
  color: var(--text);
  white-space: pre-wrap;
  margin-left: 4px;
  word-wrap: break-word;
}

.typing {
  font-family: 'Caveat', cursive;
  font-size: 18px;
  color: var(--text-soft);
  font-style: italic;
  margin-bottom: 24px;
  padding-left: 4px;
  opacity: 0;
  transition: opacity 0.4s;
}

.typing.show { opacity: 1; }

.typing .dot {
  animation: blink 1.4s infinite;
}
.typing .dot:nth-child(2) { animation-delay: 0.2s; }
.typing .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 60%, 100% { opacity: 0.3; }
  30% { opacity: 1; }
}

.composer {
  padding: 20px 40px 28px;
  border-top: 1px dashed var(--border);
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-shrink: 0;
}

.input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 19px;
  line-height: 32px;
  color: var(--text);
  resize: none;
  padding: 0;
  outline: none;
  min-height: 32px;
  max-height: 160px;
  overflow-y: auto;
}

.input::placeholder {
  color: var(--text-soft);
  font-style: italic;
}

.input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.send,
.attach {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  color: var(--accent);
  font-size: 18px;
  font-family: 'Caveat', cursive;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}

.send:hover:not(:disabled),
.attach:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(139, 111, 71, 0.08);
}

.send:disabled,
.attach:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Вложения */

.attachment-preview {
  margin: 0 40px 12px;
  padding: 10px 14px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
}

.attachment-preview-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 16px;
  color: var(--text);
}

.attachment-preview-content img {
  max-height: 48px;
  max-width: 64px;
  border-radius: 4px;
  object-fit: cover;
}

.attachment-preview-content .file-name {
  font-style: italic;
  color: var(--text-soft);
}

.attachment-remove {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-soft);
  cursor: pointer;
  padding: 0 4px;
  font-family: inherit;
}

.attachment-remove:hover { color: var(--offline); }

/* Сообщение с вложением */

.msg-attachment-image {
  margin-top: 6px;
  margin-left: 4px;
  display: block;
  max-width: 100%;
  max-height: 320px;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.msg-attachment-image:hover { opacity: 0.85; }

.msg-attachment-file {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 6px 4px 0;
  padding: 8px 14px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.3);
  transition: all 0.2s;
}

.msg-attachment-file:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.55);
}

.msg-attachment-file .file-icon {
  font-size: 20px;
}

.msg-attachment-file .file-meta {
  color: var(--text-soft);
  font-size: 14px;
  font-style: italic;
}

/* Кнопка-ссылка на дневник в header */

.diary-link {
  font-size: 15px;
  color: var(--text-soft);
  font-style: italic;
  font-family: 'Crimson Pro', Georgia, serif;
  text-decoration: none;
  padding: 0;
  cursor: pointer;
  transition: color 0.2s;
}

.diary-link:hover {
  color: var(--text);
  text-decoration: underline;
}

/* Observer-специфика */
.observer-badge {
  font-family: 'Caveat', cursive;
  font-size: 16px;
  color: var(--offline);
  font-style: italic;
  letter-spacing: 0.3px;
}

.composer.observer-empty {
  justify-content: center;
  color: var(--text-soft);
  font-style: italic;
  font-size: 14px;
  padding: 20px 40px;
}

.mode-indicator {
  background: var(--offline);
  color: #F2EBDC;
  font-family: 'Caveat', cursive;
  font-size: 14px;
  padding: 2px 10px;
  border-radius: 10px;
  letter-spacing: 0.4px;
  margin-left: 4px;
}