/* Header Styles - Independent Navigation Component */

/* ========================================
   SAFE AREA SUPPORT FOR iPHONE X+
   ======================================== */

/* Safe area support for header */
@supports (padding: max(0px)) {
    header {
        padding-top: max(0px, env(safe-area-inset-top));
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
    }
}

/* ========================================
   HEADER VARIABLES
   ======================================== */
:root {
    --header-height: 70px;
    --header-scrolled-height: 60px;
    --header-bg: transparent;
    --header-border: rgba(255, 255, 255, 0.05);
    --header-blur: 0;
}

/* ========================================
   HEADER STRUCTURE
   ======================================== */

/* Main Header */
header {
    background: transparent;
    backdrop-filter: blur(0);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-fast);
    height: var(--header-height);
}

/* Mobile header with solid background */
@media (max-width: 768px) {
    header {
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* Header Content Container */
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-4);
    transition: height var(--transition-fast);
}

/* ========================================
   LOGO STYLES
   ======================================== */

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.logo-img {
    height: 40px;
    width: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: height var(--transition-fast);
}

.logo-text {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.5px;
    transition: font-size var(--transition-fast);
}

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

.nav-desktop {
    display: none;
    align-items: center;
    gap: var(--space-2);
}

.nav-link {
    color: var(--gray-300);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--primary-400);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: block;
}

.menu-button {
    background: transparent;
    border: 0;
    padding: var(--space-3);
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.menu-button:hover {
    transform: scale(1.05);
}

.menu-button:focus {
    outline: none;
    border: 0;
}

.hamburger-icon,
.close-icon {
    color: var(--white);
    font-size: var(--text-xl);
    transition: all var(--transition-fast);
    position: relative;
    z-index: 1;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 999;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    overflow: hidden;
}

.mobile-nav-link {
    display: block;
    color: var(--gray-300);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.mobile-nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary-500);
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
}

.mobile-nav-link:hover::before {
    transform: translateX(0);
}

.mobile-nav-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.05);
    padding-left: var(--space-8);
}

.mobile-nav-link:last-child {
    border-bottom: none;
}

.mobile-nav-link.active {
    color: var(--primary-400);
    background: rgba(59, 130, 246, 0.1);
}

/* Mobile Menu Animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-menu.active {
    display: block;
    animation: slideDown 0.3s ease-out;
}

/* ========================================
   SCROLLED STATE
   ======================================== */

header.scrolled {
    height: var(--header-scrolled-height);
}

header.scrolled .header-content {
    height: var(--header-scrolled-height);
}

header.scrolled .logo-img {
    height: 35px;
}

header.scrolled .logo-text {
    font-size: var(--text-xl);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .header-content {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .header-content {
        padding: 0 var(--space-8);
    }
    
    .nav-link {
        font-size: var(--text-base);
        padding: var(--space-3) var(--space-5);
    }
}

/* ========================================
   DARK MODE SUPPORT
   ======================================== */

@media (prefers-color-scheme: dark) {
    header {
        background: transparent;
        border-bottom-color: rgba(255, 255, 255, 0.05);
    }
    
    .nav-link {
        color: var(--gray-300);
    }
    
    .nav-link:hover {
        color: var(--primary-color);
    }
    
    .mobile-menu {
        background: rgba(0, 0, 0, 0.99);
        border-top-color: rgba(255, 255, 255, 0.05);
    }
    
    .mobile-nav-link {
        color: var(--gray-300);
        border-bottom-color: rgba(255, 255, 255, 0.03);
    }
    
    .mobile-nav-link:hover {
        color: var(--white);
        background: rgba(255, 255, 255, 0.03);
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .nav-link::before,
    .menu-button::before,
    .mobile-nav-link::before {
        display: none;
    }
    
    .nav-link:hover::before {
        display: none;
    }
    
    .nav-link:hover,
    .menu-button:hover,
    .mobile-nav-link:hover {
        transform: none;
    }
    
    .mobile-menu.active {
        animation: none;
    }
}