/* =================================================================
   RAXE - Layout
   Header, nav dropdowns, mobile menu, footer, toast, slideIn
   Dark-first design: all chrome uses dark intel aesthetic
   ================================================================= */

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    background: var(--color-surface-overlay);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
    z-index: 100;
}

.header-scrolled {
    background: rgba(11, 14, 20, 0.98);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo-img {
    height: 36px;
    width: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.2s;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    padding: 0;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.nav-link-active {
    color: var(--color-brand-primary);
}

/* ===== NAV DROPDOWNS ===== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    padding: 8px 0;
}

.nav-chevron {
    transition: transform 0.2s;
    flex-shrink: 0;
}

.nav-dropdown.open .nav-chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: var(--color-surface-card);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-xs) 0;
    z-index: 200;
}

.nav-dropdown.open .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-item {
    display: block;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all 0.15s;
    white-space: nowrap;
}

.nav-dropdown-item:hover {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
}

.nav-dropdown-item:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: -2px;
}

.nav-dropdown-item-active {
    color: var(--color-brand-primary);
}

.nav-external-icon {
    font-size: 0.75rem;
    opacity: 0.6;
}

/* ===== NAV BUTTONS ===== */
.github-stars {
    background: var(--color-surface-elevated);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.nav-link-login {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link-login:hover {
    background: rgba(56, 189, 248, 0.2);
    border-color: rgba(56, 189, 248, 0.5);
}

/* ===== MOBILE MENU ===== */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface-primary);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: var(--space-sm) 0;
        border-bottom: 1px solid var(--color-border-primary);
        box-shadow: var(--shadow-lg);
        gap: 0;
        align-items: stretch;
    }
    .nav.active {
        display: flex;
    }
    .nav-link {
        padding: var(--space-md) var(--space-lg);
        width: 100%;
        text-align: left;
    }
    .nav-link-login {
        margin: var(--space-sm) var(--space-lg);
        justify-content: center;
        width: auto;
    }

    /* Mobile dropdowns */
    .nav-dropdown {
        width: 100%;
    }
    .nav-dropdown-toggle {
        width: 100%;
        padding: var(--space-md) var(--space-lg);
        justify-content: space-between;
    }
    .nav-dropdown-menu {
        position: static;
        transform: none;
        border: none;
        box-shadow: none;
        border-radius: 0;
        background: var(--color-surface-secondary);
        min-width: auto;
        padding: 0;
    }
    .nav-dropdown-item {
        padding: 10px 20px 10px 40px;
        font-size: 0.85rem;
    }

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

/* ===== FOOTER ===== */
.footer {
    padding: 0;
    background: var(--color-surface-secondary);
}

.footer-gradient-line {
    height: 2px;
    background: linear-gradient(90deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--space-2xl) 0 var(--space-xl);
    gap: var(--space-2xl);
}

.footer-brand {
    flex-shrink: 0;
}

.footer-logo {
    height: 24px;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    max-width: 200px;
}

.footer-columns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-column-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.footer-column a {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--color-brand-primary);
}

.footer-community {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-border-subtle);
}

.footer-community a {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    transition: color 0.2s;
}

.footer-community a:hover {
    color: var(--color-brand-primary);
}

.footer-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md) 0 var(--space-xl);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.footer-version {
    font-family: var(--font-mono);
    opacity: 0.6;
}

.footer-meta-link {
    color: var(--color-text-muted);
    transition: color 0.2s;
}

.footer-meta-link:hover {
    color: var(--color-brand-primary);
}

@media (max-width: 768px) {
    .footer-top {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--space-xl);
    }
    .footer-brand p {
        max-width: none;
    }
    .footer-columns {
        gap: var(--space-xl);
    }
    .footer-column {
        align-items: center;
    }
    .footer-community {
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .footer-columns {
        flex-direction: column;
        gap: var(--space-lg);
    }
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 9999;
}

.toast {
    background: var(--color-surface-elevated, #1a2030);
    color: var(--color-text-primary);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-accent);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-error);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

/* ===== ERROR PAGE (404) ===== */
.error-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
}

.error-content {
    max-width: 560px;
}

.error-code {
    font-family: var(--font-mono);
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-brand-primary);
    line-height: 1;
    margin-bottom: var(--space-md);
}

.error-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.error-message {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.error-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== GLOBAL FOCUS-VISIBLE BASELINE (WCAG 2.1 AA) ===== */
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline-offset: 0;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-brand-primary) 20%, transparent);
}