/* ===================================
   Header Component Styles
   header.css
   ================================= */

/* ===================================
   Base Header Styles
   ================================= */

.header {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    color: var(--white);
    padding: 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(37, 99, 235, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

/* ===================================
   Navigation Container
   ================================= */

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    position: relative;
}

/* ===================================
   Logo Styles
   ================================= */

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    z-index: 1001;
}

.logo img {
    width: 5em;
    height: 3em;
}

.logo:hover {
    transform: scale(1.05);
    color: var(--accent-color);
}

/* ===================================
   Desktop Navigation Menu
   ================================= */

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.75rem 0;
    display: block;
}

.nav-menu a:hover {
    color: var(--accent-color);
    transform: translateY(-1px);
}

.nav-menu a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a.active {
    color: var(--accent-color);
}

/* ===================================
   Mobile Menu Toggle Button
   ================================= */

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    transform: scale(1.1);
    color: var(--accent-color);
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 4px;
}

.mobile-menu-toggle.active {
    transform: rotate(90deg);
}

/* ===================================
   Mobile Navigation Styles
   ================================= */

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1.5rem;
        height: 70px;
    }

    .logo {
        font-size: 1.25rem;
    }

    .logo::before {
        font-size: 1.5rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 2rem 0;
        transition: left 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
        width: 100%;
        text-align: center;
    }

    .nav-menu a {
        color: var(--text-dark);
        font-size: 1.2rem;
        padding: 1rem 2rem;
        display: block;
        border-radius: 8px;
        margin: 0 1rem;
        transition: all 0.3s ease;
        position: relative;
    }

    .nav-menu a::after {
        display: none;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
        background: var(--primary-color);
        color: var(--white);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

    /* Mobile menu overlay */
    .nav-menu.active::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
        backdrop-filter: blur(4px);
    }
}

/* ===================================
   Small Mobile Adjustments
   ================================= */

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
        height: 60px;
    }

    .logo {
        font-size: 1.125rem;
    }

    .logo::before {
        font-size: 1.25rem;
    }

    .nav-menu {
        top: 60px;
        height: calc(100vh - 60px);
        padding: 1.5rem 0;
    }

    .nav-menu a {
        font-size: 1.125rem;
        padding: 0.875rem 1.5rem;
        margin: 0 0.75rem;
    }
}

/* ===================================
   Header Animation States
   ================================= */

/* Hide header on scroll down, show on scroll up */
.header.hidden {
    transform: translateY(-100%);
}

.header.visible {
    transform: translateY(0);
}

/* Header background transitions */
.header.transparent {
    background: rgba(37, 99, 235, 0.1);
    backdrop-filter: blur(10px);
}

.header.solid {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    backdrop-filter: none;
}

/* ===================================
   Accessibility Improvements
   ================================= */

/* Focus states */
.nav-menu a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .header,
    .nav-menu,
    .logo,
    .nav-menu a,
    .mobile-menu-toggle {
        transition: none;
    }

    .logo:hover {
        transform: none;
    }

    .mobile-menu-toggle.active {
        transform: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .header {
        background: #000000;
        border-bottom: 2px solid #ffffff;
    }

    .nav-menu a {
        border: 1px solid transparent;
    }

    .nav-menu a:hover,
    .nav-menu a:focus {
        border-color: var(--accent-color);
        background: var(--accent-color);
    }
}

/* ===================================
   Dark Mode Support
   ================================= */

@media (prefers-color-scheme: dark) {
    .header {
        background: linear-gradient(135deg, #1e40af, #1e3a8a);
    }

    @media (max-width: 768px) {
        .nav-menu {
            background: #111827;
        }

        .nav-menu a {
            color: #f3f4f6;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            background: #1e40af;
            color: #ffffff;
        }
    }
}

/* ===================================
   Print Styles
   ================================= */

@media print {
    .header {
        display: none;
    }
}

/* ===================================
   Utility Classes for Header
   ================================= */

/* Header modifier classes */
.header--transparent {
    background: rgba(37, 99, 235, 0.1);
    backdrop-filter: blur(10px);
}

.header--solid {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    backdrop-filter: none;
}

.header--shadow-light {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header--shadow-heavy {
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.2);
}

/* Navigation state classes */
.nav-menu--mobile-open {
    left: 0;
}

.nav-menu--mobile-closed {
    left: -100%;
}

/* Logo modifier classes */
.logo--large {
    font-size: 1.75rem;
}

.logo--small {
    font-size: 1.125rem;
}

.logo--no-icon::before {
    display: none;
}