/* ===================================
   Header Styles
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    z-index: 1000;
    padding: 1rem 0;
    width: 100%;
    z-index: 999;
}

/* Hide animation */
@keyframes headerHide {
    0% {
        transform: translateY(0);
    }

    100% {
        transform: translateY(-100%);
    }
}

/* Show animation */
@keyframes headerShow {
    0% {
        transform: translateY(-100%);
    }

    100% {
        transform: translateY(0);
    }
}

/* Classes applied by JS */
.header.hide {
    animation: headerHide 0.35s ease forwards;
}

.header.show {
    animation: headerShow 0.35s ease forwards;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #1a1a2e;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: #6366f1;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: #64748b;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #6366f1;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 2px;
}

/* ===================================
   Mobile Responsive Header
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    .header-container {
        padding: 0 1.5rem;
    }

    .nav {
        gap: 1.5rem;
    }
}

/* Mobile Landscape */
@media (max-width: 768px) {
    .header {
        padding: 0.875rem 0;
    }

    .header-container {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.1rem;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .nav {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .logo-text {
        display: none;
    }
}

/* Mobile Portrait */
@media (max-width: 640px) {
    .header {
        padding: 0.75rem 0;
    }

    .header-container {
        padding: 0 0.875rem;
    }

    .logo {
        font-size: 1rem;
    }

    .logo-icon {
        width: 26px;
        height: 26px;
    }

    .nav {
        gap: 0.75rem;
        flex-wrap: wrap;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.25rem 0.5rem;
    }
}

/* Extra Small Mobile */
@media (max-width: 480px) {
    .header {
        padding: 0.625rem 0;
    }

    .header-container {
        padding: 0 0.75rem;
    }

    .logo {
        font-size: 0.95rem;
    }

    .logo-icon {
        width: 24px;
        height: 24px;
    }

    .nav {
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 0.2rem 0.4rem;
    }
}

/* Very Small Mobile */
@media (max-width: 360px) {
    .logo {
        font-size: 0.9rem;
    }

    .logo-icon {
        width: 22px;
        height: 22px;
    }

    .nav-link {
        font-size: 0.75rem;
    }
}

/* Touch Device Optimization */
@media (hover: none) and (pointer: coarse) {
    .nav-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}