:root {
  --mac-bg: #121214;
  --mac-sidebar: #1a1a1e;
  --mac-card: #22222a;
  --mac-card-hover: #2a2a34;
  --mac-border: rgba(255, 255, 255, 0.06);
  --ios-accent: #0a84ff;
  --ios-green: #30d158;
  --ios-red: #ff453a;
  --text-main: #f5f5f7;
  --text-muted: #8e8e93;
}

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

body {
  background-color: var(--mac-bg);
  color: var(--text-main);
  font-family: 'Inter', -apple-system, sans-serif;
  height: 100vh;
  width: 100vw;
  display: flex;
  overflow: hidden;
}

.mac-window-frame {
  width: 100%;
  height: 100%;
  background-color: var(--mac-bg);
  display: flex;
  overflow: hidden;
}

.sidebar {
  width: 280px;
  background-color: var(--mac-sidebar);
  border-right: 1px solid var(--mac-border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.25rem;
  flex-shrink: 0;
}

.window-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 1.5rem;
}

.window-controls .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  cursor: pointer;
}
.window-controls .dot.close { background-color: var(--ios-red); }
.window-controls .dot.minimize { background-color: #ff9f0a; }
.window-controls .dot.maximize { background-color: var(--ios-green); }

.widgets-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 1.5rem;
}

.ios-widget {
  background: #22222a;
  border-radius: 14px;
  padding: 12px;
  text-align: center;
  box-shadow: inset 0 0 0 1px var(--mac-border);
}

.calendar-widget {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calendar-widget .cal-header {
  color: var(--ios-red);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.calendar-widget .cal-date {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
}

.calendar-widget .cal-day {
  font-size: 0.65rem;
  color: var(--text-muted);
}

.clock-widget {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.clock-widget .clock-display {
  font-family: 'SF Mono', monospace;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ios-accent);
}

.clock-widget .clock-sub {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: 14px;
  margin-bottom: 1.5rem;
  border: 1px solid var(--mac-border);
}

.user-profile img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(10, 132, 255, 0.3);
}

.user-meta h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}

.role-badge {
  font-size: 0.7rem;
  color: var(--ios-accent);
  font-weight: 500;
  background: rgba(10, 132, 255, 0.1);
  padding: 1px 6px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 2px;
}

.session-stamp {
  display: block;
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'SF Mono', monospace;
  margin-top: 4px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-btn {
  background: none;
  border: none;
  color: #d1d1d6;
  padding: 12px 14px;
  text-align: left;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s ease;
}

.nav-btn i {
  font-size: 1rem;
  color: var(--text-muted);
  width: 20px;
}

.nav-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.nav-btn.active {
  background-color: var(--ios-accent);
  color: #fff;
}
.nav-btn.active i { color: #fff; }

.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar-ios {
  height: 64px;
  border-bottom: 1px solid var(--mac-border);
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(18, 18, 20, 0.8);
  backdrop-filter: blur(20px);
  flex-shrink: 0;
}

#pageTitle { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.3px; }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-item.battery {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ios-green);
  background: rgba(48, 209, 88, 0.1);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-family: 'SF Mono', monospace;
  font-weight: 600;
}

.music-toggle-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--mac-border);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.music-toggle-btn.playing {
  background-color: var(--ios-accent);
  border-color: transparent;
  box-shadow: 0 0 12px rgba(10, 132, 255, 0.4);
  animation: pulse 2s infinite;
}

.content-body {
  flex-grow: 1;
  overflow-y: auto;
  padding: 2.5rem;
}

.section-intro { margin-bottom: 2rem; }
.section-intro h2 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.4px; }
.section-intro p { font-size: 0.9rem; color: var(--text-muted); margin-top: 4px; }

.api-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.api-card {
  background-color: var(--mac-card);
  border: 1px solid var(--mac-border);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.api-card:hover {
  background-color: var(--mac-card-hover);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.badge {
  font-family: 'SF Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
}
.badge.get { background: rgba(10, 132, 255, 0.15); color: var(--ios-accent); }

.api-card code {
  font-family: 'SF Mono', monospace;
  font-size: 0.8rem;
  color: #ff375f;
}

.api-card h3 { font-size: 1.05rem; font-weight: 600; }
.api-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

.action-link {
  margin-top: auto;
  text-decoration: none;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--mac-border);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  transition: background 0.2s;
}

.action-link:hover { background-color: rgba(255, 255, 255, 0.12); }

.viewport-section { display: none; }
.viewport-section.active { display: block; animation: easeInWindow 0.25s ease-out; }

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

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.06); }
  100% { transform: scale(1); }
}