/**
 * Verbi - Layout CSS
 * Navigation, Sidebar, Grid Layouts
 */

/* ============================================
   CONTAINER & GRID
   ============================================ */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

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

/* Grid system */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

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

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

/* ============================================
   APP LAYOUT (Logged in)
   ============================================ */

.app-layout {
    min-height: 100vh;
    display: flex;
}

.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-normal);
}

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

.app-sidebar.collapsed .sidebar-label,
.app-sidebar.collapsed .sidebar-section-title {
    opacity: 0;
    visibility: hidden;
}

.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

.app-sidebar.collapsed ~ .app-main {
    margin-left: var(--sidebar-collapsed);
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    bottom: var(--space-4);
    left: var(--space-4);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    z-index: 200;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

@media (max-width: 1024px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    
    .app-sidebar.open {
        transform: translateX(0);
    }
    
    .app-main {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: flex;
    }
}

/* ============================================
   SIDEBAR COMPONENTS
   ============================================ */

.sidebar-logo {
    padding: var(--space-4) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-logo svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.sidebar-logo-text {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
}

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

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--space-2);
    padding: 0 var(--space-2);
    transition: opacity var(--transition-fast);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-lg);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.sidebar-link:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.sidebar-link.active {
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.sidebar-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-label {
    transition: opacity var(--transition-fast);
    white-space: nowrap;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.plan-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    color: white;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
}

.plan-badge svg {
    width: 16px;
    height: 16px;
}

.upgrade-btn {
    display: block;
    width: 100%;
    padding: var(--space-3);
    background: var(--color-surface-hover);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    text-align: center;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.upgrade-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* ============================================
   HEADER / TOP BAR
   ============================================ */

.app-header {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-left: auto;
}

/* Stats display */
.stats-display {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-surface-hover);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.stat-item svg {
    width: 20px;
    height: 20px;
}

.stat-value {
    font-family: var(--font-mono);
    font-weight: var(--font-semibold);
}

/* Streak (Fluss) */
.fluss-stat {
    color: var(--color-accent);
}

.fluss-stat svg {
    animation: flame-pulse 1s ease-in-out infinite;
}

@keyframes flame-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Kerne */
.kerne-stat {
    color: var(--color-primary);
}

/* Shields */
.schilde-display {
    display: flex;
    gap: var(--space-1);
}

.schilde-display svg {
    width: 20px;
    height: 20px;
}

.schilde-display svg.depleted {
    opacity: 0.3;
}

/* User menu */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    color: white;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.user-avatar:hover {
    transform: scale(1.05);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    width: 200px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: 100;
}

.user-menu:hover .user-dropdown,
.user-menu:focus-within .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.user-dropdown-item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.user-dropdown-item svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   PAGE CONTENT AREA
   ============================================ */

.page-content {
    flex: 1;
    padding: var(--space-6);
}

@media (max-width: 640px) {
    .page-content {
        padding: var(--space-4);
    }
}

.page-header {
    margin-bottom: var(--space-8);
}

.page-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-2);
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: var(--text-lg);
}

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

.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    z-index: 100;
    padding: 0 var(--space-2);
}

.mobile-nav-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 100%;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-xs);
    transition: color var(--transition-fast);
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    color: var(--color-primary);
}

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

@media (max-width: 1024px) {
    .mobile-nav {
        display: block;
    }
    
    .app-main {
        padding-bottom: 64px;
    }
}

/* ============================================
   HERO & SECTION LAYOUTS
   ============================================ */

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

@media (min-width: 768px) {
    .section {
        padding: var(--space-24) 0;
    }
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-12);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-4);
}

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

/* Two column layout */
.split-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    align-items: center;
}

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

/* ============================================
   CARD GRID
   ============================================ */

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

@media (min-width: 640px) {
    .card-grid.card-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

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

.footer-section h4 {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

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

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

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

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

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-social a:hover {
    color: var(--color-primary);
}

.footer-social svg {
    width: 20px;
    height: 20px;
}