/* ============================================================================
   ENHANCED MOBILE-FIRST HEADER STYLES - FIXED MOBILE MENU
   ============================================================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: var(--blur-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.4s var(--ease-out-cubic);
    height: var(--header-height-mobile);
    
    /* Mobile optimizations */
    -webkit-backdrop-filter: var(--blur-lg);
    will-change: transform, background-color;
}

.header.scrolled {
    background: rgba(2, 6, 23, 0.98);
    border-bottom-color: rgba(234, 179, 8, 0.3);
    box-shadow: var(--shadow-2xl);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding-mobile);
    position: relative;
}

/* Enhanced Logo - Mobile Optimized */
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--slate-100);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.025em;
    transition: transform 0.3s ease;
    cursor: pointer;
    z-index: calc(var(--z-header) + 2);
    
    /* Mobile touch optimizations */
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.logo:hover {
    transform: scale(1.05);
}

.logo:focus {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--radius-sm);
}

.logo-mark {
    position: relative;
    width: 36px;
    height: 36px;
    background: var(--gradient-gold);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--slate-950);
    font-weight: 900;
    font-size: 0.9rem;
    box-shadow: var(--shadow-gold-mobile);
    transition: all 0.3s var(--ease-spring);
    
    /* Performance optimization */
    will-change: transform;
}

.logo-mark::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-gold-intense);
    border-radius: 12px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.logo:hover .logo-mark {
    transform: rotate(5deg) scale(1.1);
    box-shadow: var(--shadow-gold);
}

.logo:hover .logo-mark::before {
    opacity: 0.6;
}

/* FIXED: Enhanced Mobile Navigation - Removed scrolling issues */
.nav-links {
    /* Mobile: Hidden by default, shown as overlay */
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    background: var(--slate-950);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem var(--container-padding-mobile);
    transform: translateX(100%);
    transition: transform 0.3s var(--ease-mobile);
    z-index: var(--z-mobile-menu);
    list-style: none;
    
    /* FIXED: Remove height and overflow to prevent scrolling */
    height: auto;
    min-height: auto;
    max-height: none;
    overflow: visible;
    
    /* Mobile optimizations */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

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

.nav-link {
    color: var(--slate-300);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.875rem 1.5rem;
    cursor: pointer;
    
    /* Mobile touch optimizations */
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    border-radius: var(--radius-md);
    width: auto;
    min-width: 200px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--gold-400);
    background: rgba(234, 179, 8, 0.1);
    transform: translateY(-2px);
}

.nav-link:focus {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.nav-link:active {
    transform: translateY(0);
}

/* CTA Button - Mobile Optimized */
.nav-cta {
    background: var(--gradient-gold);
    color: var(--slate-950);
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s var(--ease-spring);
    box-shadow: var(--shadow-gold-mobile);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    
    /* Mobile touch optimizations */
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
}

.nav-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-gold-intense);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-cta:hover,
.nav-cta:focus {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-gold);
}

.nav-cta:hover::before {
    opacity: 1;
}

.nav-cta:active {
    transform: translateY(0) scale(1);
}

.nav-cta:focus {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.nav-cta span {
    position: relative;
    z-index: 10;
}

/* Enhanced Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: calc(var(--z-header) + 1);
    position: relative;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    border-radius: var(--radius-sm);
    
    /* Mobile touch optimizations */
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: background-color 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: rgba(234, 179, 8, 0.1);
}

.mobile-menu-toggle:focus {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.hamburger-line {
    width: 24px;
    height: 3px;
    background: var(--gold-400);
    border-radius: 2px;
    transition: all 0.3s var(--ease-mobile);
    transform-origin: center;
    display: block;
}

/* Animated hamburger to X transformation */
.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu Backdrop */
.mobile-menu-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: calc(var(--z-mobile-menu) - 1);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.mobile-menu-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

/* Enhanced responsive design */

/* Tablet Styles */
@media (min-width: 768px) {
    .header {
        height: var(--header-height-tablet);
    }
    
    .nav {
        padding: 0 var(--container-padding-tablet);
    }
    
    .nav-links {
        top: var(--header-height-tablet);
        padding: 2.5rem var(--container-padding-tablet);
        gap: 2rem;
    }
    
    .logo {
        font-size: 1.25rem;
        gap: 10px;
    }
    
    .logo-mark {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        border-radius: 12px;
    }
    
    .nav-link {
        font-size: 1.25rem;
        padding: 1rem 1.75rem;
    }
    
    .nav-cta {
        font-size: 1.125rem;
        padding: 1rem 2rem;
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .header {
        height: var(--header-height-desktop);
    }
    
    .nav {
        padding: 0 var(--container-padding-desktop);
    }
    
    /* Desktop: Show horizontal navigation */
    .mobile-menu-toggle {
        display: none;
    }
    
    .nav-links {
        position: static;
        background: none;
        flex-direction: row;
        justify-content: flex-end;
        align-items: center;
        gap: 2.5rem;
        padding: 0;
        transform: none;
        height: auto;
        overflow: visible;
        top: auto;
        bottom: auto;
        left: auto;
        right: auto;
        min-height: auto;
        max-height: none;
    }
    
    .nav-link {
        font-size: 0.875rem;
        padding: 0.75rem 0;
        min-height: auto;
        width: auto;
        min-width: auto;
        background: none;
        position: relative;
    }
    
    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--gradient-gold);
        transition: width 0.4s var(--ease-out-cubic);
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: none;
        transform: translateY(-2px);
    }
    
    .nav-link:hover::after,
    .nav-link.active::after {
        width: 100%;
    }
    
    .nav-cta {
        font-size: 0.875rem;
        padding: 0.875rem 1.75rem;
        min-height: auto;
    }
    
    .logo {
        font-size: 1.375rem;
        gap: 12px;
    }
    
    .logo-mark {
        width: 42px;
        height: 42px;
        font-size: 1rem;
        border-radius: 12px;
    }
}

/* Large Desktop Styles */
@media (min-width: 1280px) {
    .nav-links {
        gap: 3rem;
    }
    
    .nav-link {
        font-size: 1rem;
    }
    
    .nav-cta {
        font-size: 0.875rem;
        padding: 1rem 2rem;
    }
}

/* Performance optimizations for mobile */
@media (max-width: 1023px) {
    .nav-links {
        will-change: transform;
    }
    
    .mobile-menu-toggle {
        will-change: background-color;
    }
    
    .hamburger-line {
        will-change: transform, opacity;
    }
}

/* Accessibility enhancements */
@media (prefers-reduced-motion: reduce) {
    .nav-links {
        transition: none;
    }
    
    .hamburger-line {
        transition: none;
    }
    
    .logo-mark {
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .header {
        border-bottom-color: rgba(255, 255, 255, 0.3);
    }
    
    .nav-link {
        border: 1px solid transparent;
    }
    
    .nav-link:focus {
        border-color: var(--gold-400);
    }
}