/**
 * Version Notes:
 * File: /pwa/css/layout.css
 * Version: 0.0.1
 * Last Modified: 2026-04-03 02:00 PM
 * Changes:
 * - Main app layout: sidebar + content
 * - Responsive: sidebar collapses on mobile, bottom nav appears
 * - Smooth transitions, no jank
 */

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), width var(--transition);
  z-index: 100;
}

.sidebar-header {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-primary);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--sidebar-active);
  color: var(--text-primary);
  font-weight: 500;
}

.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--border-primary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-secondary);
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--accent-muted);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.view {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.view.active {
  display: flex;
}

.view-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  background: var(--bg-primary);
}

.view-header h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  flex: 1;
}

.view-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.placeholder-text {
  color: var(--text-tertiary);
  text-align: center;
  padding: 60px 20px;
  font-size: 14px;
}

/* ============================================
   ICONS
   ============================================ */
.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.icon-logo {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ============================================
   MOBILE NAV (bottom bar)
   ============================================ */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: 4px 0;
  padding-bottom: env(safe-area-inset-bottom, 4px);
  z-index: 200;
}

.mobile-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 10px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: color var(--transition);
}

.mobile-tab .icon { width: 22px; height: 22px; }
.mobile-tab.active { color: var(--text-primary); }
.mobile-tab:hover { color: var(--text-secondary); }

.mobile-menu-btn { display: none; }

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-nav {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .main {
    padding-bottom: 64px; /* space for bottom nav */
  }

  .view-header {
    padding: 12px 16px;
  }
}

/* === END OF FILE (FILENAME: /pwa/css/layout.css) === */