/* ========================================
   LAYOUT SYSTEM
   Desktop and Mobile responsive layouts
   ======================================== */

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow-x: hidden;
}

body {
  display: flex;
  transition: background-color var(--transition-medium);
}

/* ========================================
   DESKTOP NAVIGATION
   ======================================== */

.desktop-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: 240px;
  height: 100vh;
  background-color: var(--color-bg-card);
  border-right: 1px solid var(--color-border);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: all var(--transition-medium);
}

.nav-logo {
  margin-bottom: var(--space-xxl);
}

.nav-logo .logo {
  color: var(--color-text-primary);
  text-decoration: none;
  display: block;
  transition: color var(--transition-fast);
}

.nav-logo .logo:hover {
  color: var(--color-ascii-green);
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.nav-links li {
  margin-bottom: var(--space-s);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-m);
  padding: var(--space-m);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-m);
  font-size: var(--font-size-nav);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-item i {
  width: 20px;
  height: 20px;
}

.nav-item:hover {
  background-color: rgba(0, 255, 65, 0.05);
  color: var(--color-text-primary);
}

.nav-item.active {
  background-color: rgba(0, 255, 65, 0.1);
  color: var(--color-ascii-green);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background-color: var(--color-ascii-green);
  border-radius: 0 2px 2px 0;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-m);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background-color: rgba(0, 255, 65, 0.05);
  border-color: var(--color-ascii-green);
}

.theme-toggle i {
  width: 20px;
  height: 20px;
  transition: all var(--transition-medium);
}

.theme-toggle .sun-icon {
  position: absolute;
  opacity: 1;
  transform: rotate(0deg);
}

.theme-toggle .moon-icon {
  position: absolute;
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle .sun-icon {
  opacity: 0;
  transform: rotate(-180deg);
}

[data-theme="dark"] .theme-toggle .moon-icon {
  opacity: 1;
  transform: rotate(0deg);
}

/* ========================================
   MAIN CONTENT AREA
   ======================================== */

.main-content {
  flex: 1;
  margin-left: 240px;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
  overflow: hidden;
  transition: margin-left var(--transition-medium);
}

/* For pages with regular content (not swipe deck) */
.main-content.with-padding {
  padding: var(--space-xl);
  overflow: auto;
  align-items: flex-start;
}

/* ========================================
   MOBILE NAVIGATION
   ======================================== */

.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 72px;
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: var(--space-s) var(--space-m);
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .mobile-nav {
  background-color: rgba(20, 22, 23, 0.9);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  padding: var(--space-s);
  border-radius: var(--radius-s);
  transition: all var(--transition-fast);
  flex: 1;
  max-width: 80px;
}

.mobile-nav-item i {
  width: 24px;
  height: 24px;
}

.mobile-nav-item.active {
  color: var(--color-ascii-green);
}

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

/* ========================================
   RESPONSIVE BREAKPOINTS
   ======================================== */

/* Tablet and below */
@media (max-width: 1024px) {
  .desktop-nav {
    width: 80px;
    padding: var(--space-l) var(--space-m);
  }

  .nav-logo .logo {
    font-size: 14px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }

  .nav-item span {
    display: none;
  }

  .nav-item {
    justify-content: center;
    padding: var(--space-m) var(--space-s);
  }

  .main-content {
    margin-left: 80px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .main-content {
    margin-left: 0;
    padding: 0;
    height: calc(100vh - 72px); /* Account for mobile nav */
  }

  .main-content.with-padding {
    padding: var(--space-m);
    padding-bottom: 88px;
  }

  .mobile-nav {
    display: flex;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .main-content {
    padding: 0;
    height: calc(100vh - 64px);
  }

  .main-content.with-padding {
    padding: var(--space-s);
    padding-bottom: 88px;
  }

  .mobile-nav {
    height: 64px;
    padding: var(--space-xs) var(--space-s);
  }

  .mobile-nav-item {
    font-size: 10px;
    padding: var(--space-xs);
  }

  .mobile-nav-item i {
    width: 20px;
    height: 20px;
  }
}

/* ========================================
   CONTAINER UTILITIES
   ======================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-l);
}

.container-narrow {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-l);
}

.container-card {
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid {
  display: grid;
  gap: var(--space-l);
}

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

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

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

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container,
  .container-narrow {
    padding: 0 var(--space-m);
  }
}

@media (max-width: 480px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .container,
  .container-narrow {
    padding: 0 var(--space-s);
  }
}