/**
 * Modern Mobile-First Responsive CSS Framework for ProtoForge
 * Based on 2024 best practices for mobile design
 */

/* CSS Custom Properties for responsive design */
:root {
  /* Breakpoints - Mobile First */
  --breakpoint-mobile: 767px;
  --breakpoint-tablet: 1023px;
  --breakpoint-desktop: 1024px;
  
  /* Responsive spacing */
  --spacing-xs: clamp(4px, 1vw, 8px);
  --spacing-sm: clamp(8px, 2vw, 12px);
  --spacing-md: clamp(12px, 3vw, 16px);
  --spacing-lg: clamp(16px, 4vw, 24px);
  --spacing-xl: clamp(24px, 6vw, 32px);
  
  /* Responsive typography */
  --font-size-xs: clamp(10px, 2.5vw, 12px);
  --font-size-sm: clamp(12px, 3vw, 14px);
  --font-size-base: clamp(14px, 3.5vw, 16px);
  --font-size-lg: clamp(16px, 4vw, 18px);
  --font-size-xl: clamp(18px, 4.5vw, 20px);
  --font-size-2xl: clamp(20px, 5vw, 24px);
  --font-size-3xl: clamp(24px, 6vw, 32px);
  
  /* Touch targets */
  --touch-target-min: 44px;
  --touch-target-padding: 12px;
  
  /* Mobile navigation */
  --bottom-nav-height: 60px;
  --top-bar-height: 56px;
  
  /* Safe areas (iOS) */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  
  /* Z-index layers */
  --z-bottom-nav: 1000;
  --z-drawer: 2000;
  --z-modal: 3000;
  --z-toast: 4000;
  --z-fab: 1500;
}

/* ===== MOBILE-FIRST BASE STYLES ===== */

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  font-size: var(--font-size-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  min-height: 100vh;
}

/* ===== MOBILE LAYOUT (DEFAULT) ===== */

/* Mobile app structure - only apply on mobile */
@media (max-width: 767px) {
  .mobile-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-bottom: var(--bottom-nav-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 100;
    background: var(--bg);
  }
  
  /* Hide desktop layout on mobile */
  .container {
    display: none !important;
  }
  
  /* Hide desktop header on mobile */
  header {
    display: none !important;
  }
}

/* Top app bar for mobile */
.mobile-top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--top-bar-height);
  backdrop-filter: blur(8px);
}

.mobile-top-bar .title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.mobile-top-bar .actions {
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
}

/* Main content area */
.mobile-main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Mobile navigation tabs */
.mobile-tabs {
  display: flex;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.mobile-tabs::-webkit-scrollbar {
  display: none;
}

.mobile-tab {
  flex: 1;
  min-width: 0;
  padding: var(--spacing-md);
  text-align: center;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  min-height: var(--touch-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-tab.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  background: var(--accent-weak);
}

.mobile-tab:hover {
  background: var(--accent-weak);
}

/* Tab content */
.mobile-tab-content {
  flex: 1;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-tab-pane {
  display: none;
  padding: var(--spacing-md);
  height: 100%;
}

.mobile-tab-pane.active {
  display: block;
}

/* Bottom navigation */
.mobile-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--panel);
  border-top: 1px solid var(--border);
  padding: var(--spacing-xs) var(--spacing-md) calc(var(--spacing-xs) + var(--safe-area-bottom));
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: var(--z-bottom-nav);
  min-height: var(--bottom-nav-height);
}

.mobile-bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs);
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: color 0.2s ease;
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
}

.mobile-bottom-nav-item.active {
  color: var(--accent);
}

.mobile-bottom-nav-item .icon {
  font-size: var(--font-size-lg);
}

/* Floating Action Button */
.mobile-fab {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--spacing-lg) + var(--safe-area-bottom));
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: var(--z-fab);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mobile-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.mobile-fab:active {
  transform: scale(0.95);
}

/* Bottom sheet */
.mobile-bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--panel);
  border-top: 1px solid var(--border);
  border-radius: 12px 12px 0 0;
  padding: var(--spacing-lg);
  z-index: var(--z-drawer);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 80vh;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-bottom-sheet.open {
  transform: translateY(0);
}

.mobile-bottom-sheet::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
}

/* Drawer navigation */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  max-width: 85vw;
  background: var(--panel);
  border-right: 1px solid var(--border);
  z-index: var(--z-drawer);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-drawer-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-drawer-content {
  padding: var(--spacing-md);
}

/* Mobile cards */
.mobile-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.mobile-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.mobile-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

/* Mobile buttons */
.mobile-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: var(--font-size-base);
  font-weight: 500;
  min-height: var(--touch-target-min);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  text-decoration: none;
}

.mobile-btn.primary {
  background: var(--accent);
  color: var(--text);
}

.mobile-btn.secondary {
  background: var(--accent-weak);
  border-color: var(--accent);
}

.mobile-btn:active {
  transform: translateY(1px);
}

/* Mobile inputs */
.mobile-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 8px;
  font-family: inherit;
  font-size: var(--font-size-base);
  min-height: var(--touch-target-min);
  box-sizing: border-box;
}

.mobile-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 255, 153, 0.2);
}

/* Mobile lists */
.mobile-list {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.mobile-list-item {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--touch-target-min);
  cursor: pointer;
  transition: background 0.2s ease;
}

.mobile-list-item:last-child {
  border-bottom: none;
}

.mobile-list-item:hover {
  background: var(--accent-weak);
}

.mobile-list-item.active {
  background: var(--accent-weak);
  border-left: 3px solid var(--accent);
}

/* ===== TABLET LAYOUT ===== */

@media (min-width: 768px) {
  .mobile-layout {
    padding-bottom: 0;
  }
  
  .mobile-bottom-nav {
    display: none;
  }
  
  .mobile-fab {
    bottom: var(--spacing-lg);
  }
  
  /* Tablet grid layout */
  .tablet-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: auto 1fr;
    height: 100vh;
  }
  
  .tablet-sidebar {
    grid-column: 1;
    grid-row: 1 / -1;
    background: var(--panel);
    border-right: 1px solid var(--border);
    overflow: auto;
  }
  
  .tablet-main {
    grid-column: 2;
    grid-row: 1 / -1;
    display: flex;
    flex-direction: column;
  }
  
  .tablet-top-bar {
    grid-column: 2;
    grid-row: 1;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .tablet-content {
    grid-column: 2;
    grid-row: 2;
    flex: 1;
    overflow: auto;
    padding: var(--spacing-md);
  }
}

/* ===== DESKTOP LAYOUT ===== */

@media (min-width: 1024px) {
  /* Desktop grid layout */
  .desktop-layout {
    display: grid;
    grid-template-columns: 320px 1fr 400px;
    grid-template-rows: auto 1fr;
    height: 100vh;
  }
  
  .desktop-sidebar {
    grid-column: 1;
    grid-row: 1 / -1;
    background: var(--panel);
    border-right: 1px solid var(--border);
    overflow: auto;
  }
  
  .desktop-main {
    grid-column: 2;
    grid-row: 1 / -1;
    display: flex;
    flex-direction: column;
  }
  
  .desktop-top-bar {
    grid-column: 2;
    grid-row: 1;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .desktop-content {
    grid-column: 2;
    grid-row: 2;
    flex: 1;
    overflow: auto;
    padding: var(--spacing-md);
  }
  
  .desktop-rightbar {
    grid-column: 3;
    grid-row: 1 / -1;
    background: var(--panel);
    border-left: 1px solid var(--border);
    overflow: auto;
  }
  
  /* Hide mobile elements on desktop */
  .mobile-bottom-nav,
  .mobile-fab,
  .mobile-drawer {
    display: none;
  }
  
  /* Show desktop layout on desktop */
  .container {
    display: grid !important;
  }
  
  header {
    display: flex !important;
  }
}

/* ===== UTILITY CLASSES ===== */

.mobile-only { display: block; }
.tablet-up { display: none; }
.desktop-up { display: none; }

@media (min-width: 768px) {
  .mobile-only { display: none; }
  .tablet-up { display: block; }
}

@media (min-width: 1024px) {
  .desktop-up { display: block; }
}

/* Touch-friendly targets */
.touch-target {
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  padding: var(--touch-target-padding);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Touch feedback states */
.touch-pressed {
  transform: scale(0.95);
  opacity: 0.8;
  transition: transform 0.1s ease, opacity 0.1s ease;
}

/* Responsive typography */
.mobile-text-xs { font-size: var(--font-size-xs); }
.mobile-text-sm { font-size: var(--font-size-sm); }
.mobile-text-base { font-size: var(--font-size-base); }
.mobile-text-lg { font-size: var(--font-size-lg); }
.mobile-text-xl { font-size: var(--font-size-xl); }

/* Responsive spacing */
.mobile-p-xs { padding: var(--spacing-xs); }
.mobile-p-sm { padding: var(--spacing-sm); }
.mobile-p-md { padding: var(--spacing-md); }
.mobile-p-lg { padding: var(--spacing-lg); }

.mobile-m-xs { margin: var(--spacing-xs); }
.mobile-m-sm { margin: var(--spacing-sm); }
.mobile-m-md { margin: var(--spacing-md); }
.mobile-m-lg { margin: var(--spacing-lg); }

/* ===== ACCESSIBILITY ===== */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .mobile-bottom-sheet,
  .mobile-drawer,
  .mobile-fab {
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .mobile-btn,
  .mobile-tab,
  .mobile-bottom-nav-item {
    border-width: 2px;
  }
  
  .mobile-card {
    border-width: 2px;
  }
}

/* Focus styles */
.mobile-btn:focus,
.mobile-input:focus,
.mobile-tab:focus,
.mobile-bottom-nav-item:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */

@media print {
  .mobile-bottom-nav,
  .mobile-fab,
  .mobile-drawer,
  .mobile-bottom-sheet {
    display: none !important;
  }
  
  .mobile-layout {
    padding-bottom: 0;
  }
  
  .mobile-main-content {
    overflow: visible;
  }
}