/* =========================================
   SaaS Zap — Layout
   Header, Footer, Grid, Sections
   ========================================= */

/* --- Header --- */
.sz-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
}

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

.sz-header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.35rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 400;
}

.sz-header__logo:hover {
    color: var(--text-primary);
}

.sz-header__logo-icon {
    font-size: 1.5rem;
}

.sz-header__logo-text strong {
    font-weight: 800;
}

/* --- Navigation --- */
.sz-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.sz-nav__list li {
    position: relative;
}

.sz-nav__list li a {
    display: block;
    padding: 0.5rem 0.85rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sz-nav__list li a:hover,
.sz-nav__list li.current-menu-item > a {
    color: var(--text-primary);
    background: var(--bg-card);
}

/* Dropdown */
.sz-nav__list .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-base);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.sz-nav__list li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sz-nav__list .sub-menu li a {
    padding: 0.5rem 0.75rem;
    font-size: 0.825rem;
}

/* --- Header Actions --- */
.sz-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sz-header__search-toggle,
.sz-header__menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sz-header__search-toggle:hover,
.sz-header__menu-toggle:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
    background: var(--bg-card);
}

.sz-header__menu-toggle {
    display: none;
}

/* Hamburger */
.sz-hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 18px;
}

.sz-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* --- Search Bar --- */
.sz-search {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--border-subtle);
}

.sz-search__form {
    display: flex;
    gap: var(--space-sm);
}

.sz-search__input {
    flex: 1;
    padding: 0.65rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast);
}

.sz-search__input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* --- Grid System --- */
.sz-grid {
    display: grid;
    gap: var(--space-lg);
}

.sz-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sz-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sz-grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .sz-grid--3 { grid-template-columns: repeat(2, 1fr); }
    .sz-grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .sz-grid--2,
    .sz-grid--3,
    .sz-grid--4 { grid-template-columns: 1fr; }
}

/* --- Footer --- */
.sz-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.sz-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.sz-footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: var(--space-md);
}

.sz-footer__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    max-width: 280px;
}

.sz-footer__social {
    display: flex;
    gap: var(--space-sm);
}

.sz-footer__social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.sz-footer__social a:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.08);
}

.sz-footer__heading {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.sz-footer__links li {
    margin-bottom: var(--space-sm);
}

.sz-footer__links a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.sz-footer__links a:hover {
    color: var(--text-primary);
}

.sz-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.sz-footer__disclaimer a {
    color: var(--text-muted);
    text-decoration: underline;
}

/* --- Responsive Footer --- */
@media (max-width: 768px) {
    .sz-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .sz-footer__bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .sz-footer__grid {
        grid-template-columns: 1fr;
    }

    /* Mobile navigation */
    .sz-nav {
        display: none;
    }

    .sz-nav.is-open {
        display: block;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        padding: var(--space-lg);
        z-index: 99;
    }

    .sz-nav.is-open .sz-nav__list {
        flex-direction: column;
    }

    .sz-nav.is-open .sz-nav__list li a {
        font-size: 1.1rem;
        padding: 0.75rem;
    }

    .sz-header__menu-toggle {
        display: flex;
    }
}