/* ============================================
   LAYOUT.CSS — Container, Grid, Sections, Nav
   ============================================ */

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

.container--narrow {
    max-width: 900px;
}

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

/* --- Section --- */
.section {
    padding: var(--space-3xl) 0;
    position: relative;
    overflow: hidden;
}

.section--alt {
    background-color: var(--bg-secondary);
}

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

.section__header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-xl);
}

.section__header p {
    margin-top: var(--space-sm);
}

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

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

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

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

.grid--6 {
    grid-template-columns: repeat(6, 1fr);
}

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

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

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

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

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

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

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

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-nav);
    padding: var(--space-sm) 0;
    transition: all var(--duration-normal) var(--ease-out);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(7, 8, 12, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.7rem 0;
}

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

.navbar__logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.navbar__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--duration-fast) ease;
    position: relative;
}

.navbar__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width var(--duration-normal) var(--ease-out);
}

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

.navbar__link:hover::after {
    width: 100%;
}

.navbar__cta {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.6rem 1.4rem;
    background: var(--gradient-cta);
    color: #fff;
    border-radius: var(--radius-full);
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: 0 2px 15px rgba(124, 58, 237, 0.3);
}

.navbar__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 25px rgba(124, 58, 237, 0.5);
}

/* Mobile Nav Toggle */
.navbar__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: var(--z-overlay);
}

.navbar__toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-normal) var(--ease-out);
}

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

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

.navbar__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.navbar__mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(7, 8, 12, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    z-index: var(--z-modal);
    transition: right var(--duration-slow) var(--ease-out);
}

.navbar__mobile-menu.open {
    right: 0;
}

.navbar__mobile-menu .navbar__link {
    font-size: 1.3rem;
    font-weight: 600;
}

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

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__text {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

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

.footer__link {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    transition: color var(--duration-fast) ease;
}

.footer__link:hover {
    color: var(--text-accent);
}

/* --- Background Meshes --- */
.bg-mesh {
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.bg-glow--purple {
    background: var(--accent-violet);
}

.bg-glow--amber {
    background: var(--accent-amber);
}

.bg-glow--indigo {
    background: var(--accent-indigo);
}