/* Space-Optimized Mobile-First Design System */

/* ===== Compact Layout Variables ===== */
:root {
  /* Tighter Spacing Scale */
  --space-0-5: 0.125rem;  /* 2px */
  --space-1: 0.25rem;     /* 4px */
  --space-1-5: 0.375rem;  /* 6px */
  --space-2: 0.5rem;      /* 8px */
  --space-3: 0.75rem;     /* 12px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  
  /* Compact Component Heights */
  --height-tile: 80px;
  --height-card: 60px;
  --height-button: 36px;
  --height-input: 40px;
  --height-nav: 56px;
  
  /* Optimized Touch Targets */
  --touch-min: 44px;
  --touch-compact: 36px;
  
  /* Compact Border Radius */
  --radius-xs: 0.25rem;   /* 4px */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
}

/* ===== Compact Tile System ===== */
.tile-compact {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.2s ease;
  text-align: center;
  min-height: var(--height-tile);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.tile-compact:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.tile-compact:active {
  transform: scale(0.95);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Tile Icon Optimization */
.tile-compact .tile-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

/* ===== Horizontal Flow Layout ===== */
.flow-horizontal {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  -webkit-overflow-scrolling: touch;
}

.flow-item {
  flex-shrink: 0;
  text-align: center;
}

.flow-arrow {
  flex-shrink: 0;
  color: var(--gray-300);
  font-size: 0.875rem;
}

/* ===== Compact Card System ===== */
.card-compact {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: all 0.2s ease;
  min-height: var(--height-card);
}

.card-compact:active {
  background: var(--gray-50);
}

.card-icon-compact {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-content-compact {
  flex: 1;
  min-width: 0;
}

.card-title-compact {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-subtitle-compact {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Space-Efficient Grid ===== */
.grid-compact {
  display: grid;
  gap: var(--space-2);
}

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

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

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

/* ===== Horizontal Scroll Container ===== */
.scroll-horizontal {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  margin-left: calc(var(--space-4) * -1);
  margin-right: calc(var(--space-4) * -1);
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.scroll-horizontal::-webkit-scrollbar {
  display: none;
}

.scroll-card {
  flex-shrink: 0;
  width: 280px;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 1px solid var(--gray-200);
}

/* ===== Compact Section Spacing ===== */
.section-compact {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.section-header-compact {
  margin-bottom: var(--space-4);
}

.section-title-compact {
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.section-subtitle-compact {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== Compact Hero ===== */
.hero-compact {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.hero-title-compact {
  font-size: 1.5rem;
  line-height: 1.2;
  font-weight: 300;
  margin-bottom: var(--space-3);
}

.hero-subtitle-compact {
  font-size: 0.875rem;
  line-height: 1.4;
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .hero-title-compact {
    font-size: 2.5rem;
  }
  
  .hero-subtitle-compact {
    font-size: 1rem;
  }
}

/* ===== Compact Bottom Navigation ===== */
.nav-bottom-compact {
  height: var(--height-nav);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.nav-item-compact {
  font-size: 0.625rem;
  padding: var(--space-1-5);
}

.nav-icon-compact {
  font-size: 0.875rem;
  margin-bottom: var(--space-0-5);
}

/* ===== Compact Buttons ===== */
.btn-compact {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  height: var(--height-button);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1-5);
  transition: all 0.2s ease;
}

.btn-compact:active {
  transform: scale(0.95);
}

/* ===== Utility Classes ===== */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.no-scrollbar {
  scrollbar-width: none;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}

/* ===== Responsive Breakpoints ===== */
@media (min-width: 640px) {
  .grid-compact-sm-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .grid-compact-sm-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 768px) {
  .section-compact {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }
  
  .grid-compact-md-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .grid-compact-md-6 {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-compact-lg-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .grid-compact-lg-6 {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ===== Performance Optimizations ===== */
.tile-compact,
.card-compact,
.btn-compact {
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .tile-compact,
  .card-compact,
  .btn-compact {
    transition: none;
  }
}