/* ============================================
   MOTAS Corporate Site - Layout Styles
   Section Structure, Grid, Containers
   ============================================ */

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container-sm {
    max-width: 800px;
}

.container-lg {
    max-width: 1400px;
}

/* ---------- Section Base ---------- */
.section {
    position: relative;
    padding: var(--space-5xl) 0;
}

.section-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text);
}

.section-light {
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-title {
    font-family: var(--font-english);
    font-size: var(--fs-3xl);
    font-weight: 400;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

/* ---------- Header ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: var(--space-lg) 0;
    transition: background-color var(--transition-base);
}

.header.scrolled {
    background-color: var(--color-overlay);
    backdrop-filter: blur(10px);
}

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

.logo {
    font-family: var(--font-english);
    font-size: var(--fs-xl);
    letter-spacing: 0.2em;
    font-weight: 400;
    display: flex;
    align-items: center;
    color: var(--color-text);
}

.logo-svg {
    width: 36px;
    height: 36px;
    font-family: var(--font-english);
}

.nav-list {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--fs-sm);
    letter-spacing: 0.05em;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.nav-link:hover {
    opacity: 1;
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ---------- Footer ---------- */
.footer {
    background-color: var(--color-primary-dark);
    padding: var(--space-3xl) 0 var(--space-xl);
    text-align: center;
}

.footer-logo {
    font-family: var(--font-english);
    font-size: var(--fs-lg);
    letter-spacing: 0.2em;
    margin-bottom: var(--space-lg);
}

.footer-text {
    font-size: var(--fs-xs);
    color: var(--color-text-subtle);
}

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

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

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

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

/* ---------- Flex Utilities ---------- */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-column {
    flex-direction: column;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

.gap-xl {
    gap: var(--space-xl);
}

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

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }

    .section {
        padding: var(--space-4xl) 0;
    }

    .section-title {
        font-size: var(--fs-2xl);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Mobile Navigation */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-primary);
        padding: var(--space-5xl) var(--space-xl);
        transition: right var(--transition-base);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .nav-link {
        font-size: var(--fs-md);
    }

    .menu-toggle {
        display: flex;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .section {
        padding: var(--space-3xl) 0;
    }
}