/* ==========================================================================
   layout.css - Layout System, Navbar, Footer, Sidebar, Grid Utilities
   ========================================================================== */

/* ==========================================================================
   Body & Page Wrapper
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image: var(--gradient-bg);
  background-attachment: fixed;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding-top: calc(var(--navbar-height) + var(--spacing-6));
  padding-bottom: var(--spacing-16);
}

/* ==========================================================================
   Container
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-xl {
  max-width: var(--container-xl);
}

.container-2xl {
  max-width: var(--container-2xl);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

/* ==========================================================================
   Navbar / Header
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  z-index: var(--z-fixed);
  background: var(--navbar-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--navbar-border);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .navbar-inner {
    padding: 0 var(--spacing-6);
  }
}

@media (min-width: 1024px) {
  .navbar-inner {
    padding: 0 var(--spacing-8);
  }
}

/* ---- Logo ---- */

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.navbar-logo:hover {
  opacity: 0.85;
}

.navbar-logo-icon {
  width: 32px;
  height: 32px;
}

.navbar-logo-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Nav Links ---- */

.navbar-nav {
  display: none;
  align-items: center;
  gap: var(--spacing-1);
}

@media (min-width: 1024px) {
  .navbar-nav {
    display: flex;
  }
}

.navbar-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.navbar-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-border);
}

.navbar-link.active {
  color: var(--color-accent-primary);
}

.navbar-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--spacing-3);
  right: var(--spacing-3);
  height: 2px;
  background: var(--color-accent-primary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--color-accent-primary);
}

/* ---- Navbar Actions (right side) ---- */

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex-shrink: 0;
}

.navbar-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.navbar-action-btn:hover {
  color: var(--color-text-primary);
  background-color: var(--color-border);
}

.navbar-action-btn svg,
.navbar-action-btn i {
  width: 20px;
  height: 20px;
}

/* Theme toggle */
.theme-toggle {
  position: relative;
}

/* Language selector */
.lang-selector {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Auth buttons in navbar */
.navbar-auth {
  display: none;
  align-items: center;
  gap: var(--spacing-2);
}

@media (min-width: 768px) {
  .navbar-auth {
    display: flex;
  }
}

.navbar-auth .btn-login {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
}

.navbar-auth .btn-login:hover {
  color: var(--color-text-primary);
}

.navbar-auth .btn-register {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-bg-primary);
  background: var(--gradient-accent);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  transition: opacity var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar-auth .btn-register:hover {
  opacity: 0.9;
  box-shadow: var(--shadow-glow);
}

/* User menu (when logged in) */
.navbar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  cursor: pointer;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

.navbar-user:hover {
  background-color: var(--color-border);
}

.navbar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-accent-primary);
}

.navbar-user-name {
  display: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

@media (min-width: 768px) {
  .navbar-user-name {
    display: block;
  }
}

/* ---- Hamburger Menu ---- */

.navbar-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 5px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

@media (min-width: 1024px) {
  .navbar-hamburger {
    display: none;
  }
}

.navbar-hamburger:hover {
  background-color: var(--color-border);
}

.navbar-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.navbar-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.navbar-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Mobile Navigation ---- */

.mobile-nav {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-fixed);
  background: var(--color-bg-secondary);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
  padding: var(--spacing-4);
}

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

@media (min-width: 1024px) {
  .mobile-nav {
    display: none;
  }
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-accent-primary);
  background-color: var(--color-border);
}

.mobile-nav-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-3) 0;
}

.mobile-nav-auth {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-top: var(--spacing-4);
}

/* Mobile nav overlay */
.mobile-nav-overlay {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: calc(var(--z-fixed) - 1);
  background: var(--overlay-bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-12) 0 var(--spacing-6);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-inner {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .footer-inner {
    padding: 0 var(--spacing-6);
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  max-width: 320px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-3);
}

.footer-brand-logo span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.footer-column-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent-primary);
}

/* Footer social */
.footer-social {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-4);
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  color: var(--color-text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  transform: translateY(-2px);
}

/* Footer bottom */
.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.footer-bottom-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-bottom-link:hover {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Sidebar (Admin)
   ========================================================================== */

.sidebar {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  z-index: var(--z-sticky);
  transition: transform var(--transition-normal), width var(--transition-normal);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

/* Content with sidebar */
.with-sidebar {
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-normal);
}

.sidebar.collapsed ~ .with-sidebar,
.sidebar.collapsed + .with-sidebar {
  margin-left: var(--sidebar-collapsed-width);
}

@media (max-width: 1023px) {
  .with-sidebar {
    margin-left: 0;
  }
}

/* ==========================================================================
   Grid Utilities
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

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

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

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

/* Auto-fill responsive grid */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

/* ==========================================================================
   Section Utilities
   ========================================================================== */

.section {
  padding: var(--spacing-12) 0;
  overflow-x: hidden;
}

.section-lg {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.section-header {
  margin-bottom: var(--spacing-8);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-size-3xl);
  }
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 600px;
}

/* ==========================================================================
   Flex Utilities
   ========================================================================== */

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

/* ==========================================================================
   Text Utilities
   ========================================================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent-primary); }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* ==========================================================================
   Spacing Utilities
   ========================================================================== */

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

/* ==========================================================================
   Visibility Utilities
   ========================================================================== */

.hidden {
  display: none !important;
}

.visible {
  visibility: visible;
}

.invisible {
  visibility: hidden;
}

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hide-tablet { display: none !important; }
}

@media (min-width: 1024px) {
  .hide-desktop { display: none !important; }
}

@media (max-width: 1023px) {
  .show-desktop-only { display: none !important; }
}

/* ==========================================================================
   Bottom Tab Bar (Mobile Navigation)
   ========================================================================== */

.bottom-tabs {
  display: none;
}

@media (max-width: 1023px) {
  .bottom-tabs {
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(64px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--navbar-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-top: 1px solid var(--navbar-border);
    z-index: var(--z-fixed);
    transition: background var(--transition-normal), border-color var(--transition-normal);
  }

  .bottom-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 3px;
    padding: 8px 0 6px;
    color: var(--color-text-muted);
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
    transition: color var(--transition-fast);
    position: relative;
    user-select: none;
  }

  .bottom-tab:hover {
    color: var(--color-text-secondary);
  }

  .bottom-tab:active {
    transform: scale(0.95);
  }

  .bottom-tab-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    transition: transform var(--transition-spring), color var(--transition-fast);
  }

  .bottom-tab-label {
    font-size: 10px;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.02em;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
  }

  /* Active tab */
  .bottom-tab.active {
    color: var(--color-accent-primary);
  }

  .bottom-tab.active .bottom-tab-icon {
    transform: scale(1.1);
    filter: drop-shadow(0 0 6px rgba(0, 255, 135, 0.4));
  }

  .bottom-tab.active .bottom-tab-label {
    font-weight: var(--font-weight-semibold);
  }

  /* Glow indicator above active tab */
  .bottom-tab.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--color-accent-primary);
    border-radius: var(--radius-full);
    box-shadow: 0 0 8px var(--color-accent-primary), 0 0 16px rgba(0, 255, 135, 0.2);
  }

  /* Adjust main content bottom padding for tab bar */
  .main-content {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px) + var(--spacing-6));
  }
}

/* ==========================================================================
   Telegram WebApp Overrides
   ========================================================================== */

/* In Telegram, hide logo and nav links but keep action buttons (theme, lang) */
.tg-webapp .navbar {
  height: 48px;
}

.tg-webapp .navbar-logo,
.tg-webapp .navbar-nav {
  display: none;
}

.tg-webapp .navbar-inner {
  justify-content: flex-end;
}

/* Adjust main-content top padding for slimmer navbar */
.tg-webapp .main-content {
  padding-top: calc(48px + var(--spacing-4));
}

/* Hide footer inside Telegram — bottom tabs are the primary navigation */
.tg-webapp .footer {
  display: none;
}

/* Fix flash message positioning with smaller navbar */
.tg-webapp .container[style*="navbar-height"] {
  margin-top: calc(48px + var(--spacing-2)) !important;
}

/* Telegram WebApp text wrapping fixes */
.tg-webapp .bottom-tab-label {
  font-size: 9px;
}

.tg-webapp .section-title {
  font-size: var(--font-size-xl);
  word-break: break-word;
}
