/* ============================================
   NUPTIA — Layout
   Sidebar, grid system, responsive
   ============================================ */

body {
  overflow-x: hidden;
}

/* ---- App Shell ---- */
.app {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

/* ---- Sidebar ---- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: width var(--transition-base), transform var(--transition-base);
  overflow: hidden;
}

.sidebar__header {
  padding: var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

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

.sidebar__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-rose), var(--accent-champagne));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.sidebar__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.sidebar__logo-badge {
  font-size: var(--text-xs);
  color: var(--accent-rose);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-left: auto;
  opacity: 0.7;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  overflow-y: auto;
}

.sidebar__section-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-4) var(--space-3) var(--space-2);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  margin-bottom: 2px;
}

.sidebar__link:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.sidebar__link.active {
  color: var(--accent-rose);
  background: var(--accent-rose-glow);
}

.sidebar__link.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent-rose);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.sidebar__link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
}

.sidebar__link-badge {
  margin-left: auto;
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--accent-rose-glow);
  color: var(--accent-rose);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.sidebar__footer {
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.sidebar__couple {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.sidebar__couple-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-rose), var(--accent-lavender));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar__couple-info {
  flex: 1;
  min-width: 0;
}

.sidebar__couple-names {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__couple-date {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  margin-top: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.theme-toggle__track {
  width: 40px;
  height: 22px;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--accent-champagne);
  transition: transform var(--transition-spring);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

[data-theme="light"] .theme-toggle__thumb {
  transform: translateX(18px);
  background: var(--accent-rose);
}

.theme-toggle__label {
  font-weight: 500;
}

/* ---- Mobile Menu Toggle ---- */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: var(--z-overlay);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-default);
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--bg-card-hover);
}

/* ---- Main Content ---- */
.main {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--transition-base);
  width: 100%;
}

.main__header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding: var(--space-5) var(--space-8);
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: background var(--transition-slow);
  width: 100%;
}

[data-theme="light"] .main__header {
  background: rgba(248, 246, 243, 0.85);
}

.main__title-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.main__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.main__subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

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

.main__content {
  padding: var(--space-8);
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

/* ---- Page Container ---- */
.page {
  display: none;
  animation: fadeInUp 0.35s ease both;
  width: 100%;
}

.page.active {
  display: block;
}

/* ---- Grid System ---- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.grid--auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid--dashboard {
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto;
}

.grid--dashboard-stats {
  grid-template-columns: repeat(4, 1fr);
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--dashboard { grid-template-columns: 1fr; }
  .grid--dashboard-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: var(--shadow-lg);
  }

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

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

  .main {
    margin-left: 0;
  }

  .main__header {
    padding: var(--space-4) var(--space-5);
    padding-left: calc(var(--space-5) + 50px);
  }

  .main__content {
    padding: var(--space-5);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .grid--dashboard-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .main__title {
    font-size: var(--text-xl);
  }
}

@media (max-width: 480px) {
  .main__content {
    padding: var(--space-3) var(--space-3) calc(80px + env(safe-area-inset-bottom));
  }

  .main__header {
    padding: var(--space-3) var(--space-3);
    padding-left: calc(var(--space-3) + 40px);
  }
}

@media (max-width: 360px) {
  .main__content {
    padding: var(--space-2) var(--space-2) calc(80px + env(safe-area-inset-bottom));
  }
  .main__header {
    padding: var(--space-2);
    padding-left: calc(var(--space-2) + 40px);
  }
  .main__title {
    font-size: var(--text-lg);
  }
}

/* ---- Mobile Overlay ---- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* ---- Bottom Navigation ---- */
.bottom-nav { 
  display: none; 
  position: fixed; 
  bottom: var(--space-4); 
  left: var(--space-4); 
  right: var(--space-4); 
  background: var(--glass-bg); 
  backdrop-filter: blur(12px); 
  -webkit-backdrop-filter: blur(12px); 
  border: 1px solid var(--border-subtle); 
  border-radius: var(--radius-full);
  z-index: var(--z-sticky); 
  box-shadow: var(--shadow-lg);
  padding: 0 var(--space-1);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.bottom-nav::-webkit-scrollbar { display: none; }
.bottom-nav__item { 
  flex: 1 0 auto;
  min-width: 52px;
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  justify-content: center; 
  padding: var(--space-2) var(--space-1); 
  color: var(--text-tertiary); 
  transition: all var(--transition-fast);
  border-radius: var(--radius-lg);
  margin: var(--space-1) 0;
  text-decoration: none;
}
.bottom-nav__item.active { 
  color: var(--text-primary); 
  background: var(--bg-card-hover);
}
.bottom-nav__icon { font-size: 1.2rem; margin-bottom: 1px; }
.bottom-nav__label { font-size: 0.6rem; font-weight: 500; white-space: nowrap; }
.mobile-settings-btn, .mobile-theme-btn { display: none; text-decoration: none; margin-left: var(--space-2); flex-shrink: 0; }
.mobile-settings-btn { font-size: 1.25rem; }
.mobile-theme-btn { font-size: 1.5rem; background: none; border: none; cursor: pointer; padding: 0; }

@media (max-width: 768px) {
  .bottom-nav { display: flex; }
  .sidebar { display: none !important; }
  .sidebar-overlay { display: none !important; }
  .mobile-settings-btn, .mobile-theme-btn { display: flex; align-items: center; }
  .main__header { 
    display: flex; 
    align-items: center; 
    padding-right: var(--space-3);
    gap: var(--space-2);
    flex-wrap: nowrap;
    overflow: hidden;
  }
  .main__header .main__title-group {
    flex: 1;
    min-width: 0;
    overflow: hidden;
  }
  .main__header .main__title, .main__header .main__subtitle {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .main__content { padding-bottom: calc(80px + env(safe-area-inset-bottom)); }
}

@media (max-width: 480px) {
  .main__content {
    padding: var(--space-3);
    padding-bottom: calc(100px + env(safe-area-inset-bottom));
  }
  .bottom-nav {
    left: var(--space-2);
    right: var(--space-2);
    bottom: var(--space-2);
  }
  .bottom-nav__item {
    min-width: 48px;
    padding: var(--space-2) 2px;
  }
  .bottom-nav__label { font-size: 0.55rem; }
  .bottom-nav__icon { font-size: 1.1rem; }
}

@media (max-width: 360px) {
  .bottom-nav__item {
    min-width: 44px;
  }
  .bottom-nav__label { font-size: 0.5rem; }
  .bottom-nav__icon { font-size: 1rem; }
}



@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}