/* _header.css - FIXED MODERN PROFESSIONAL HEADER SYSTEM */

/* =================
   CSS CUSTOM PROPERTIES FOR THEMING
   ================= */

:root {
    /* Header Gradient Variables */
    --gradient-header-primary: linear-gradient(135deg, var(--color-primary, #007bff) 0%, var(--color-primary-dark, #0056b3) 50%, var(--color-accent, var(--color-primary, #007bff)) 100%);
    --gradient-header-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --gradient-header-sticky: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);

    /* Header Layout Variables */
    --header-container-width: var(--section-max-width, 1200px);
    --header-padding-boxed: var(--spacing-md, 1rem) var(--spacing-lg, 1.5rem);
    --header-padding-full: var(--spacing-md, 1rem) var(--spacing-xl, 2rem);
    --header-border-radius-boxed: var(--border-radius-xl, 1rem);

    /* Header Heights */
    --header-height-minimal: 70px;
    --header-height-standard: 80px;
    --header-height-business: 90px;
}

/* =================
   BASE HEADER CONTAINER - FIXED GRADIENTS
   ================= */

.header-section {
    position: relative;
    background: var(--gradient-header-primary); /* FIXED: Uses CSS variable */
    backdrop-filter: blur(var(--blur-normal));
    border-bottom: 1px solid var(--color-white-alpha-medium);
    box-shadow: var(--shadow-lg);
    transition: all var(--duration-normal) var(--ease-smooth);
    z-index: var(--z-sticky);
}

.header-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--color-white-alpha-moderate),
        transparent
    );
}

.header-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--color-white-alpha-soft),
        transparent
    );
}

/* Enhanced sticky behavior - FIXED gradients */
.header-section.is-sticky {
    background: var(--gradient-header-sticky); /* FIXED: Uses CSS variable */
    backdrop-filter: blur(var(--blur-medium));
    box-shadow: var(--shadow-xl);
    border-bottom-color: var(--color-border-light);
}

/* =================
   CONTAINER SYSTEM - BOXED VS FULL WIDTH
   ================= */

/* Base container */
.header-container {
    position: relative;
    transition: all var(--duration-normal) var(--ease-smooth);
}

/* BOXED LAYOUT - Contained with margins */
.header-section.header-boxed .header-container {
    max-width: var(--header-container-width);
    margin: 0 auto;
    padding: var(--header-padding-boxed);
}

.header-section.header-boxed.section-layout-glass .header-container {
    background: var(--gradient-header-glass); /* FIXED: Uses CSS variable */
    backdrop-filter: blur(var(--blur-medium));
    border: 1px solid var(--color-white-alpha-medium);
    border-radius: var(--header-border-radius-boxed);
    box-shadow: var(--shadow-xl);
    margin: var(--spacing-md) auto;
}

/* FULL WIDTH LAYOUT - Edge to edge */
.header-section.header-full-width .header-container {
    width: 100%;
    max-width: none;
    padding: var(--header-padding-full);
}

.header-section.header-full-width .header-inner {
    max-width: var(--header-container-width);
    margin: 0 auto;
}

/* =================
   INNER CONTAINER - FLEXIBLE LAYOUTS
   ================= */

.header-inner {
    display: flex;
    align-items: center;
    width: 100%;
    position: relative;
    min-height: var(--header-height-minimal);
}

/* =================
   LAYOUT VARIANTS - NEW FLEXIBLE SYSTEM
   ================= */

/* 1. Logo Left, Menu Right (Standard) */
.header-section.layout-logo-left .header-inner {
    justify-content: space-between;
}

.header-section.layout-logo-left .header-logo {
    order: 1;
}

.header-section.layout-logo-left .header-nav {
    order: 2;
}

.header-section.layout-logo-left .header-mobile-toggle {
    order: 3;
}

/* 2. Menu Left, Logo Right (Reversed) */
.header-section.layout-logo-right .header-inner {
    justify-content: space-between;
}

.header-section.layout-logo-right .header-logo {
    order: 2;
}

.header-section.layout-logo-right .header-nav {
    order: 1;
}

.header-section.layout-logo-right .header-mobile-toggle {
    order: 3;
}

/* 3. Logo Center, Menu Split (Premium) */
.header-section.layout-logo-center .header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-section.layout-logo-center .header-logo {
    grid-column: 2;
    justify-self: center;
}

.header-section.layout-logo-center .header-nav {
    grid-column: 3;
    justify-self: end;
}

.header-section.layout-logo-center .header-mobile-toggle {
    grid-column: 3;
    justify-self: end;
}

/* 4. All Center (Minimal) */
.header-section.layout-all-center .header-inner {
    justify-content: center;
    gap: var(--spacing-2xl);
}

.header-section.layout-all-center .header-logo {
    order: 1;
}

.header-section.layout-all-center .header-nav {
    order: 2;
}

/* 5. Menu Center, Logo Left (Business) */
.header-section.layout-menu-center .header-inner {
    justify-content: center;
    position: relative;
}

.header-section.layout-menu-center .header-logo {
    position: absolute;
    left: 0;
}

.header-section.layout-menu-center .header-nav {
    justify-self: center;
}

.header-section.layout-menu-center .header-mobile-toggle {
    position: absolute;
    right: 0;
}

/* =================
   COMPONENT STYLES - LOGO
   ================= */

.header-logo {
    display: flex;
    align-items: center;
    z-index: var(--z-dropdown);
}

.header-logo-link {
    display: flex !important;
    align-items: center !important;
    gap: var(--spacing-sm);
    text-decoration: none !important;
    color: var(--color-text-inverted) !important;
    font-size: var(--font-size-xl) !important;
    font-weight: var(--typography-font-headings-weight) !important;
    line-height: var(--typography-font-headings-line-height) !important;
    transition: all var(--duration-normal) var(--ease-spring);
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-lg);
}

.header-logo-link:hover {
    transform: translateY(calc(-1 * var(--translate-small))) scale(var(--scale-micro));
    color: var(--color-text-inverted) !important;
}

.header-logo-image {
    max-height: 45px !important;
    width: auto !important;
    filter: brightness(1.1) contrast(1.1);
    transition: all var(--duration-normal) var(--ease-smooth);
    display: block !important;
}

.header-logo-link:hover .header-logo-image {
    filter: brightness(1.2) contrast(1.2) drop-shadow(0 4px 8px var(--color-black-alpha-moderate));
    transform: scale(var(--scale-micro));
}

.header-logo-text {
    background: linear-gradient(
        135deg,
        var(--color-text-inverted) 0%,
        var(--color-white-alpha-opaque) 50%,
        var(--color-text-inverted) 100%
    ) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    filter: drop-shadow(0 2px 4px var(--color-black-alpha-soft));
    transition: all var(--duration-normal) var(--ease-smooth);
    display: inline-block !important;
    font-size: inherit !important;
    font-weight: inherit !important;
    line-height: inherit !important;
    color: var(--color-text-inverted) !important; /* Fallback */
}

.header-logo-link:hover .header-logo-text {
    filter: drop-shadow(0 4px 8px var(--color-black-alpha-moderate));
    transform: scale(var(--scale-micro));
}

/* =================
   COMPONENT STYLES - NAVIGATION
   ================= */

.header-nav {
    display: flex;
    align-items: center;
    position: relative;
}

.header-nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
    margin: 0;
    padding: 0;
    background: var(--color-white-alpha-soft);
    backdrop-filter: blur(var(--blur-normal));
    border: 1px solid var(--color-white-alpha-medium);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xs) var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.header-nav-item {
    position: relative;
}

.header-nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-inverted);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: var(--typography-font-body-weight);
    border-radius: var(--border-radius-lg);
    transition: all var(--duration-normal) var(--ease-spring);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.header-nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white-alpha-soft);
    transform: scale(0);
    transition: transform var(--duration-normal) var(--ease-spring);
    border-radius: inherit;
    z-index: -1;
}

.header-nav-link:hover {
    transform: translateY(calc(-1 * var(--translate-small)));
    color: var(--color-text-inverted);
    text-shadow: 0 2px 4px var(--color-black-alpha-soft);
}

.header-nav-link:hover::before {
    transform: scale(1);
}

.header-nav-link.is-active {
    background: var(--color-white-alpha-medium);
    color: var(--color-text-inverted);
    font-weight: 600;
}

.header-nav-link.is-active::before {
    transform: scale(1);
    background: var(--color-white-alpha-visible);
}

/* =================
   MOBILE MENU TOGGLE
   ================= */

.header-mobile-toggle {
    display: none;
    background: var(--color-white-alpha-soft);
    backdrop-filter: blur(var(--blur-normal));
    border: 1px solid var(--color-white-alpha-medium);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-spring);
    position: relative;
    overflow: hidden;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

.header-mobile-toggle:hover {
    transform: translateY(calc(-1 * var(--translate-small))) scale(var(--scale-micro));
    background: var(--color-white-alpha-medium);
    box-shadow: var(--shadow-md);
}

.header-mobile-toggle:active {
    transform: scale(var(--scale-down-small));
}

.header-mobile-icon {
    width: 20px;
    height: 2px;
    background: var(--color-text-inverted);
    position: relative;
    transition: all var(--duration-normal) var(--ease-spring);
    border-radius: var(--border-radius-sm);
}

.header-mobile-icon::before,
.header-mobile-icon::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--color-text-inverted);
    border-radius: var(--border-radius-sm);
    transition: all var(--duration-normal) var(--ease-spring);
}

.header-mobile-icon::before {
    top: -6px;
}

.header-mobile-icon::after {
    top: 6px;
}

.header-mobile-toggle[aria-expanded="true"] .header-mobile-icon {
    background: transparent;
}

.header-mobile-toggle[aria-expanded="true"] .header-mobile-icon::before {
    transform: translateY(6px) rotate(45deg);
}

.header-mobile-toggle[aria-expanded="true"] .header-mobile-icon::after {
    transform: translateY(-6px) rotate(-45deg);
}

/* =================
   GLASS LAYOUT OVERRIDES - FIXED GRADIENTS
   ================= */

.header-section.section-layout-glass {
    background: transparent;
    padding: var(--spacing-md) 0;
}

.header-section.section-layout-glass.header-boxed .header-container {
    background: var(--gradient-header-glass); /* FIXED: Uses CSS variable */
    backdrop-filter: blur(var(--blur-medium));
    border: 1px solid var(--color-white-alpha-medium);
    border-radius: var(--header-border-radius-boxed);
    box-shadow: var(--shadow-xl);
    margin-top: var(--spacing-md);
}

.header-section.section-layout-glass .header-logo-text {
    background: var(--color-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--color-primary);
}

.header-section.section-layout-glass .header-nav-link {
    color: var(--color-primary);
    background: var(--color-white-alpha-medium);
}

.header-section.section-layout-glass .header-nav-link:hover {
    color: var(--color-text-inverted);
    background: var(--color-primary);
}

.header-section.section-layout-glass .header-mobile-icon,
.header-section.section-layout-glass .header-mobile-icon::before,
.header-section.section-layout-glass .header-mobile-icon::after {
    background: var(--color-primary);
}

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

@media (max-width: 768px) {
    /* Mobile overrides */
    .header-section.layout-logo-center .header-inner,
    .header-section.layout-menu-center .header-inner {
        display: flex !important;
        justify-content: space-between !important;
        position: relative !important;
    }

    .header-section.layout-logo-center .header-logo,
    .header-section.layout-menu-center .header-logo {
        position: static !important;
        grid-column: unset !important;
        order: 1 !important;
    }

    .header-section.layout-logo-center .header-nav,
    .header-section.layout-menu-center .header-nav {
        position: static !important;
        grid-column: unset !important;
        order: 2 !important;
    }

    .header-section.layout-logo-center .header-mobile-toggle,
    .header-section.layout-menu-center .header-mobile-toggle {
        position: static !important;
        grid-column: unset !important;
        order: 3 !important;
    }

    /* Boxed containers on mobile */
    .header-section.header-boxed .header-container {
        margin: 0 var(--spacing-sm);
        border-radius: var(--border-radius-lg);
    }

    .header-nav {
        display: none;
    }

    .header-nav.is-open {
        display: block !important;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        background: var(--gradient-header-primary) !important; /* FIXED: Uses CSS variable */
        z-index: 999999 !important;
        padding: 60px 20px 20px !important;
        box-sizing: border-box !important;
        overflow-y: auto !important;
    }

    .header-nav.is-open .header-nav-list {
        list-style: none !important;
        padding: 0 !important;
        margin: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        height: 100% !important;
        gap: 20px !important;
        background: transparent !important;
        border: none !important;
        backdrop-filter: none !important;
        box-shadow: none !important;
    }

    .header-nav.is-open .header-nav-item {
        width: 100% !important;
        max-width: 300px !important;
        display: block !important;
    }

    .header-nav.is-open .header-nav-link {
        display: block !important;
        padding: 15px 25px !important;
        background: rgba(255, 255, 255, 0.2) !important;
        color: white !important;
        text-decoration: none !important;
        border-radius: 10px !important;
        text-align: center !important;
        font-size: 18px !important;
        font-weight: 600 !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .header-nav.is-open .header-nav-link:hover {
        background: rgba(255, 255, 255, 0.3) !important;
    }

    .header-mobile-toggle {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        background: var(--color-primary) !important;
        border: none !important;
        padding: 12px !important;
        border-radius: 6px !important;
        cursor: pointer !important;
        z-index: 1000000 !important;
        position: relative !important;
        width: 44px !important;
        height: 44px !important;
    }

    .header-mobile-icon {
        width: 22px !important;
        height: 3px !important;
        background: white !important;
        position: relative !important;
        transition: all 0.3s ease !important;
        display: block !important;
    }

    .header-mobile-icon::before,
    .header-mobile-icon::after {
        content: '' !important;
        position: absolute !important;
        width: 22px !important;
        height: 3px !important;
        background: white !important;
        transition: all 0.3s ease !important;
        left: 0 !important;
    }

    .header-mobile-icon::before {
        top: -8px !important;
    }

    .header-mobile-icon::after {
        top: 8px !important;
    }

    .header-mobile-toggle[aria-expanded="true"] .header-mobile-icon {
        background: transparent !important;
    }

    .header-mobile-toggle[aria-expanded="true"] .header-mobile-icon::before {
        top: 0 !important;
        transform: rotate(45deg) !important;
    }

    .header-mobile-toggle[aria-expanded="true"] .header-mobile-icon::after {
        top: 0 !important;
        transform: rotate(-45deg) !important;
    }

    body.mobile-menu-open {
        overflow: hidden !important;
        position: fixed !important;
        width: 100% !important;
        height: 100% !important;
    }
}

/* =================
   ANIMATIONS & ACCESSIBILITY
   ================= */

.header-section.section-animate {
    opacity: 1;
    transform: translateY(0);
    transition: all var(--duration-normal) var(--ease-smooth);
}

.header-section.section-animate.in-view {
    opacity: 1;
    transform: translateY(0);
}

.header-logo.scroll-animate-scale {
    opacity: 1;
    transform: scale(1);
    transition: all var(--duration-slow) var(--ease-spring);
}

.header-logo.scroll-animate-scale.in-view {
    opacity: 1;
    transform: scale(1);
}

.header-nav-list.stagger-container .stagger-item {
    opacity: 1;
    transform: translateY(0);
    transition: all var(--duration-normal) var(--ease-spring);
    transition-delay: calc(var(--stagger-index, 0) * var(--stagger-fast));
}

.header-nav-list.stagger-container.in-view .stagger-item {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .header-section,
    .header-logo,
    .header-nav-link,
    .header-mobile-toggle,
    .header-mobile-icon,
    .header-mobile-icon::before,
    .header-mobile-icon::after {
        transition: none !important;
        animation: none !important;
        transform: none !important;
    }
}

.header-logo-link:focus,
.header-nav-link:focus,
.header-mobile-toggle:focus {
    outline: 2px solid var(--color-text-inverted);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--color-primary-alpha-moderate);
}

@media (prefers-contrast: high) {
    .header-section {
        background: var(--color-primary);
        border-bottom: 2px solid var(--color-text-inverted);
    }

    .header-nav-list {
        background: var(--color-primary);
        border: 2px solid var(--color-text-inverted);
    }

    .header-mobile-toggle {
        background: var(--color-primary);
        border: 2px solid var(--color-text-inverted);
    }
}

/* =================
   PERFORMANCE OPTIMIZATIONS
   ================= */

.header-section,
.header-logo-link,
.header-nav-link,
.header-mobile-toggle {
    will-change: transform;
    backface-visibility: hidden;
    transform-style: preserve-3d;
}

.header-section.section-animate,
.header-logo.scroll-animate-scale,
.header-nav-list.stagger-container .stagger-item {
    contain: layout style paint;
}