/* Header Styles - Floating Glass Pill */

.header {
    padding: 14px 6%;
    background: linear-gradient(135deg, var(--glass-1) 0%, var(--glass-2) 100%);
    /* Matching global background #05050a */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 1400px;
    border-radius: 18px;
    z-index: 1000;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.4s ease;
    animation: headerSlideDown 0.6s ease-out;
}

@keyframes headerSlideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

[data-theme="light"] .header {
    background: linear-gradient(135deg, var(--glass-1) 0%, var(--glass-2) 100%);
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 8px 30px -10px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-left: auto;
}

/* Logo Styles */
.header-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    margin-right: auto;
}

.header-logo img {
    height: 55px;
    width: auto;
    transition: var(--transition);
}

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

/* Dark theme - logo should be light */
.header-logo img {
    filter: brightness(0) invert(1);
}

/* Light theme - logo should be dark */
[data-theme="light"] .header-logo img {
    filter: brightness(0);
}

.header-email {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8125rem;
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    min-width: 0;
    flex: 1;
}

.header-email i {
    font-size: 0.875rem;
    color: var(--accent-gold);
    flex-shrink: 0;
}

.header-email a {
    color: var(--text-secondary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-decoration: none;
    transition: var(--transition);
}

.header-email a:hover {
    color: var(--accent-gold);
}

.header-nav {
    display: flex;
    gap: 36px;
    align-items: center;
}

.header-nav {
    display: flex;
    gap: 30px;
    position: relative;
    /* Context for marker */
}

/* Sliding active indicator */
.nav-marker {
    position: absolute;
    bottom: -2px;
    left: 0;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--accent-glow);
    width: 0;
    /* JS sets this */
    pointer-events: none;
    z-index: 10;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
    letter-spacing: 0.02em;
}

/* Remove old underline */
.nav-link::after {
    display: none;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 1rem;
    z-index: 100;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 12px var(--accent-glow);
}

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
    border: none;
    padding: 5px;
}

.mobile-menu-toggle:hover {
    color: var(--accent-primary);
}

/* Mobile Navigation */
@media (max-width: 968px) {
    .header {
        padding: 16px 5%;
        top: 0;
        left: 0;
        transform: none;
        width: 100%;
        border-radius: 0;
        border-width: 0 0 1px 0;
    }

    .header-content {
        flex-wrap: nowrap;
        position: relative;
        justify-content: space-between;
        gap: 15px;
        width: 100%;
    }

    .header-logo img {
        height: 32px;
    }

    .mobile-menu-toggle {
        display: block;
        order: 2;
    }

    .theme-toggle {
        order: 1;
        flex-shrink: 0;
    }

    .header-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        margin-top: 0;
        padding-top: 0;
        border-top: none;
        order: 3;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        padding: 0;
        border-bottom: 1px solid var(--border-color);
    }

    .header-nav .nav-link {
        padding: 16px 5%;
        border-bottom: 1px solid var(--border-color);
    }

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

    .header-nav.active {
        display: flex;
    }
}

/* Mobile Portrait */
@media (max-width: 640px) {
    .header {
        padding: 16px 5%;
    }

    .header-email {
        font-size: 0.6875rem;
    }

    .header-email a {
        max-width: 160px;
    }

    .header-email i {
        font-size: 0.75rem;
        flex-shrink: 0;
    }

    .header-nav {
        gap: 0;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }
}

/* Ensure the main content is pushed below the fixed header. We set a CSS variable
   `--header-height` from JS so the layout adapts to header size (and responsive changes). */
.main-content {
    padding-top: var(--header-height, 90px);
    transition: padding-top 0.3s ease;
}

/* Compact header when user scrolls */
.header.scrolled {
    padding: 16px 6%;
    border-bottom-color: transparent;
    box-shadow: 0 1px 0 var(--border-color);
}

/* Maintain glass effect in dark mode scrolled state */
/* Maintain glass effect in dark mode scrolled state */
[data-theme="dark"] .header.scrolled {
    background: linear-gradient(135deg, var(--glass-1) 0%, var(--glass-2) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    /* Reflection border */
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.6);
}