/* ─────────────────────────────────────────────────────────
 * 暖记 — 桌面端 (1440×900) 共享布局组件
 * ───────────────────────────────────────────────────────── */

/* Desktop sidebar (wider) */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: var(--space-6) 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-6);
  margin-bottom: var(--space-10);
}

.sidebar-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), var(--tertiary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.sidebar-brand-text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--fg);
}

.sidebar-brand-sub {
  font-size: var(--text-xs);
  color: var(--muted);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 var(--space-4);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: var(--text-md);
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  transition: all var(--motion-fast) var(--ease-standard);
}

.sidebar-nav-item:hover {
  background: var(--surface-warm);
  color: var(--fg);
}

.sidebar-nav-item.active {
  background: var(--surface-warm);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-nav-item svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.sidebar-write-btn {
  margin: var(--space-5) var(--space-5);
  padding: var(--space-4) var(--space-6);
  min-height: 36px;
  background: var(--accent);
  color: var(--accent-on);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  transition: all var(--motion-fast) var(--ease-bounce);
  box-shadow: var(--shadow-accent);
}

.sidebar-write-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent-hover);
}

.sidebar-write-btn:active { transform: scale(0.97); }
.sidebar-write-btn svg { width: 20px; height: 20px; }

.sidebar-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--secondary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-user-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--fg);
}

.sidebar-user-streak {
  font-size: var(--text-xs);
  color: var(--muted);
}

/* Main content area */
.main-content {
  margin-left: 280px;
  height: 100vh;
  overflow-y: auto;
  background: var(--bg);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Desktop top bar */
.desktop-topbar {
  position: sticky;
  top: 0;
  background: var(--bg-frosted);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
  padding: var(--space-4) var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 50;
}

.desktop-topbar-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--fg);
}

.desktop-topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-action-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--fg);
  transition: all var(--motion-fast);
}

.topbar-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.topbar-action-btn svg { width: 18px; height: 18px; }

/* Three-column layout */
.three-col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-5);
}

/* Two-column wider */
.two-col-wide {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-6);
}

.content-inner {
  padding: var(--space-8) var(--space-10);
  max-width: 1120px;
}

/* Page header */
.page-header {
  margin-bottom: var(--space-6);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--fg);
}

.page-header-sub {
  font-size: var(--text-base);
  color: var(--muted);
  margin-top: var(--space-1);
}

/* Desktop status bar */
.desktop-statusbar {
  position: fixed;
  top: 0;
  left: 280px;
  right: 0;
  height: 32px;
  background: var(--surface);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  z-index: 60;
}

.desktop-statusbar .traffic-lights {
  display: flex;
  gap: 8px;
}

.desktop-statusbar .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* Focus visible styles for accessibility */
button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible {
  box-shadow: var(--focus-ring);
  outline: none;
}

/* Desktop button minimum size */
button,
[role="button"] {
  min-height: 36px;
}

/* Desktop hover enhancements */
.topbar-action-btn:hover {
  transform: translateY(-1px);
}

.sidebar-nav-item:hover {
  transform: translateX(2px);
}

/* Window overflow handling for narrow viewports */
.main-content {
  min-width: 0;
  overflow-x: hidden;
}

.content-inner {
  min-width: 0;
}