/* layout.css
 * Two-column ChatGPT-style layout.
 * Left: fixed sidebar | Right: scrollable chat main area.
 * INcibe corporate style — Rojo #E73137, Amarillo #FFDD00.
 */

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

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── App container ─────────────────────────────────────── */

#app {
  display: flex;
  height: 100dvh;
  overflow: hidden;
  transition: opacity var(--transition-normal);
}

#app.app--hidden {
  opacity: 0;
  pointer-events: none;
}

/* ── Sidebar ───────────────────────────────────────────── */

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface-alt);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  /* INcibe red stripe at the very top */
  border-top: 3px solid var(--color-incibe-red);
}

.sidebar__header {
  padding: var(--space-5) var(--space-4);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

/* The INcibe diamond / shield mark */
.sidebar__logo-mark {
  width: 36px;
  height: 36px;
  background: var(--color-incibe-red);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  box-shadow: var(--shadow-red);
}

/* Yellow accent square — mimics the 4-diamond INcibe symbol */
.sidebar__logo-mark::after {
  content: '';
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 9px;
  height: 9px;
  background: var(--color-incibe-yellow);
  border-radius: 2px;
}

.sidebar__logo-mark svg { color: #fff; }

.sidebar__logo-text {
  font-size: var(--font-size-md);
  font-weight: 800; /* Bolder for light theme */
  color: var(--color-text-primary);
  letter-spacing: 0.01em;
  display: flex;
  flex-direction: column;
}

.sidebar__logo-sub {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

/* ── New chat button ───────────────────────────────────── */

.sidebar__actions {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}

/* ── Conversation list ─────────────────────────────────── */

.sidebar__conversations {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) 0;
  background: var(--color-surface-alt);
}

.sidebar__conversations::-webkit-scrollbar { width: 4px; }
.sidebar__conversations::-webkit-scrollbar-track { background: transparent; }
.sidebar__conversations::-webkit-scrollbar-thumb {
  background: var(--color-incibe-red);
  border-radius: var(--radius-full);
  opacity: 0.5;
}

.sidebar__section-label {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-2);
}

/* ── Sidebar footer (user info) ────────────────────────── */

.sidebar__footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--color-surface);
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sidebar__user-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: var(--color-incibe-red-muted);
  border: 2px solid var(--color-incibe-red);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-incibe-red-light);
}

.sidebar__user-email {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.sidebar__footer-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap; /* Allow buttons to wrap to a new line if they don't fit */
}

/* ── Main content ──────────────────────────────────────── */

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-bg);
  height: 100%;
  /* Matching top accent */
  border-top: 3px solid var(--color-incibe-red);
}

/* ── Chat header ───────────────────────────────────────── */

.chat-header {
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  flex-shrink: 0;
  background: var(--color-surface);
}

.chat-header__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.chat-header__model {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.chat-header__model label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* ── Chat body ─────────────────────────────────────────── */

.chat-body {
  flex: 1;
  overflow: hidden;
  position: relative;
}

#chat-empty,
#chat-active {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
}

.chat-active--hidden,
.chat-empty--hidden {
  display: none !important;
}

/* ── Empty state ───────────────────────────────────────── */

.chat-empty {
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
  gap: var(--space-4);
}

.chat-empty__logo {
  width: 80px;
  height: 80px;
  background: var(--color-incibe-red);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 900;
  color: white;
  box-shadow: var(--shadow-red);
  position: relative;
}

/* Yellow accent diamond on the logo */
.chat-empty__logo::after {
  content: '';
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 14px;
  height: 14px;
  background: var(--color-incibe-yellow);
  border-radius: 3px;
}

.chat-empty__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.chat-empty__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 360px;
}

/* ── Messages area ─────────────────────────────────────── */

#messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6) var(--space-4);
  scroll-behavior: smooth;
}

#messages-container::-webkit-scrollbar { width: 6px; }
#messages-container::-webkit-scrollbar-track { background: transparent; }
#messages-container::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

/* ── Input area ────────────────────────────────────────── */

.chat-input-area {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.chat-input-wrapper {
  max-width: var(--chat-max-width);
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5); /* Increased padding inside the text box */
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input-wrapper:focus-within {
  border-color: var(--color-incibe-red);
  box-shadow: 0 0 0 2px var(--color-incibe-red-muted);
}

.chat-input-wrapper textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-md); /* Larger text in input */
  line-height: 1.5;
  resize: none;
  min-height: 28px;
  max-height: 180px;
}

.chat-input-wrapper textarea::placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

.chat-input-hint {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding-top: var(--space-2);
  max-width: var(--chat-max-width);
  margin: 0 auto;
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -100%;
    z-index: var(--z-dropdown);
    transition: left var(--transition-normal);
    height: 100dvh;
  }
  .sidebar.sidebar--open { left: 0; }
  #app { flex-direction: column; }
  .chat-header { padding: 0 var(--space-4); }
  .chat-input-area { padding: var(--space-3) var(--space-3); }
}