/* ============================================
   HEADER COMPONENT - Main Header Styles
   ============================================ */

.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: grid;
    align-items: center;
    grid-template-columns: auto 1fr auto;
    gap: 1rem;
}

.header-layout-zone {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.header-layout-zone--left {
    justify-content: flex-start;
}

.header-layout-zone--center {
    justify-content: center;
}

.header-layout-zone--right {
    justify-content: flex-end;
}

.header-logo {
    max-height: 50px;
    width: auto;
    object-fit: contain;
}

.header-logo-link {
    display: flex;
    align-items: center;
    transition: transform var(--transition-base);
}

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

.header-center-name {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--gray-800);
    white-space: nowrap;
    letter-spacing: -0.01em;
}

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

.desktop-nav {
    display: flex;
    gap: var(--space-xl);
    flex-wrap: nowrap;
    justify-content: inherit;
    min-width: 0;
}

.header-login-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    background: transparent;
    border: 1.5px solid var(--primary-200);
    color: var(--primary) !important;
    text-decoration: none !important;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    transition: all 0.25s ease-out;
    white-space: nowrap;
    position: relative;
}

.header-login-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.10);
}

.header-login-link:active {
    transform: translateY(0);
}

.header-logout-form {
    margin: 0;
}

.header-logout-button {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--gray-700);
    cursor: pointer;
    font-size: 0.82rem;
    text-decoration: underline;
}

.header-logout-button:hover,
.header-logout-button:focus {
    color: var(--primary);
}

.header-logout-form--mobile {
    align-self: flex-start;
}

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

.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-base);
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

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

.mobile-menu-toggle:focus {
    outline: 2px solid var(--primary-300);
    outline-offset: 2px;
}

.mobile-nav {
    display: none;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gray-200);
    background: var(--white);
}

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

@media (max-width: 992px) {
    .header-container {
        grid-template-columns: minmax(0, auto) minmax(0, auto);
        grid-template-areas:
            "left right"
            "center center";
        gap: 0.35rem 0.5rem;
    }

    .header-layout-zone--left {
        grid-area: left;
        justify-content: flex-start;
    }

    .header-layout-zone--center {
        grid-area: center;
        justify-content: center;
        min-width: 0;
    }

    .header-layout-zone--right {
        grid-area: right;
        justify-content: flex-end;
    }

    .header-layout-zone {
        gap: 0.4rem;
        min-width: 0;
    }

    .desktop-nav {
        display: none !important;
    }

    .site-header .mobile-menu-toggle {
        display: flex !important;
    }

    .site-header {
        padding: var(--space-sm) 0;
    }

    .header-login-link {
        padding: 0.4rem 0.7rem;
        font-size: 0.82rem;
    }

    .header-logo {
        max-height: 36px;
    }

    .header-center-name {
        font-size: 0.88rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        gap: 0.3rem 0.45rem;
    }

    .header-layout-zone {
        gap: 0.3rem;
    }

    .header-logo {
        max-height: 30px;
    }

    .header-center-name {
        font-size: 0.74rem;
    }

    .header-login-link {
        padding: 0.3rem 0.55rem;
        font-size: 0.72rem;
    }
}

.mobile-nav.is-open {
    display: flex;
}

.mobile-menu-toggle.is-open {
    border-color: var(--primary);
    color: var(--primary);
}