/* Mobile Navigation - Hamburger Menu */

/* ============================================
   HEADER & HAMBURGER BUTTON
   ============================================ */
.mobile-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: var(--z-nav);
}

.mobile-logo {
    font-size: var(--font-xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hamburger-btn {
    width: var(--touch-target);
    height: var(--touch-target);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0;
}

.hamburger-icon {
    width: 24px;
    height: 18px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hamburger-icon span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger animation */
.hamburger-btn.active .hamburger-icon span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.hamburger-btn.active .hamburger-icon span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   MENU OVERLAY
   ============================================ */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

/* ============================================
   MENU PANEL
   ============================================ */
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background: var(--bg-darker);
    z-index: var(--z-nav);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
}

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

/* Menu header */
.mobile-nav-header {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

.mobile-nav-title {
    font-size: var(--font-xl);
    font-weight: 700;
    color: white;
}

.mobile-nav-close {
    width: var(--touch-target);
    height: var(--touch-target);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Menu items */
.mobile-nav-items {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-height: var(--touch-target);
    padding: 0 var(--spacing-lg);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-base);
    font-weight: 500;
    transition: background var(--transition-fast);
    border-left: 3px solid transparent;
}

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

.mobile-nav-item.active {
    background: var(--surface);
    border-left-color: var(--primary);
    color: var(--primary);
}

.mobile-nav-item.logout {
    color: var(--error);
    margin-top: auto;
    border-top: 1px solid var(--border);
}

.mobile-nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* User info section */
.mobile-nav-user {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.mobile-nav-user-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.mobile-nav-user-email {
    font-size: var(--font-sm);
    color: var(--text-secondary);
}

.mobile-nav-credits {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    font-weight: 600;
    color: white;
    text-align: center;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (min-width: 1024px) {

    /* Hide mobile nav on desktop, show regular nav */
    .mobile-header {
        display: none;
    }
}