/* ==========================================================================
   Galerie Lumen — Layout (Container, Grid, Header, Footer, Responsive)
   ========================================================================== */

/* --- Container --- */
.container {
    max-width: var(--gl-container);
    margin: 0 auto;
    padding: 0 40px;
    width: 100%;
}

.container--wide {
    max-width: var(--gl-container-wide);
}

/* --- Section --- */
.section {
    padding: var(--gl-section-pad) 0;
    position: relative;
}

.section--bordered {
    border-top: 1px solid var(--gl-border);
}

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

/* --- Section Header --- */
.section-label {
    display: inline-block;
    font-family: var(--gl-font-mono);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gl-accent);
    margin-bottom: 20px;
    padding: 6px 16px;
    background: var(--gl-accent-dim);
    border-radius: 100px;
    border: 1px solid rgba(139, 126, 200, 0.08);
}

.section-title {
    font-family: var(--gl-font-display);
    font-size: clamp(32px, 4.5vw, 52px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--gl-text);
}

.section-subtitle {
    margin-top: 16px;
    font-family: var(--gl-font-heading);
    font-size: 20px;
    font-weight: 300;
    color: var(--gl-text-muted);
    max-width: 540px;
    line-height: 1.6;
}

/* --- Header / Navigation --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--gl-nav-height);
    background: rgba(10, 10, 12, 0.75);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--gl-border);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header.is-scrolled {
    background: rgba(10, 10, 12, 0.92);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.header__inner {
    max-width: var(--gl-container-wide);
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.header__logo-mark {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--gl-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.header__logo-mark::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gl-accent);
    box-shadow: 0 0 12px var(--gl-accent);
}

.header__logo-name {
    font-family: var(--gl-font-heading);
    font-size: 20px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gl-text);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.header__link {
    font-family: var(--gl-font-body);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--gl-text-muted);
    padding: 8px 18px;
    border-radius: 8px;
    transition: color var(--gl-transition), background var(--gl-transition);
    text-transform: uppercase;
}

.header__link:hover,
.header__link.is-active {
    color: var(--gl-text);
    background: rgba(255, 255, 255, 0.04);
}

.header__link.is-active {
    color: var(--gl-accent);
}

/* Mobile nav toggle */
.header__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 10;
}

.header__toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--gl-text);
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}

.header__toggle.is-active span:first-child {
    transform: translateY(3.25px) rotate(45deg);
}

.header__toggle.is-active span:last-child {
    transform: translateY(-3.25px) rotate(-45deg);
}

/* --- Footer --- */
.footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--gl-border);
    background: var(--gl-bg-deep);
}

.footer__top {
    display: flex;
    justify-content: space-between;
    gap: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--gl-border);
}

.footer__brand {
    max-width: 300px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer__logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1.5px solid var(--gl-accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer__logo-mark::after {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gl-accent);
}

.footer__logo-name {
    font-family: var(--gl-font-heading);
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gl-text);
}

.footer__tagline {
    font-family: var(--gl-font-heading);
    font-size: 15px;
    font-weight: 300;
    color: var(--gl-text-dim);
    line-height: 1.6;
    font-style: italic;
}

.footer__columns {
    display: flex;
    gap: 64px;
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__col-title {
    font-family: var(--gl-font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gl-text-dim);
    margin-bottom: 4px;
}

.footer__link {
    font-size: 14px;
    color: var(--gl-text-muted);
    transition: color 0.2s ease;
}

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

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
}

.footer__copy {
    font-size: 13px;
    color: var(--gl-text-faint);
}

.footer__copy a {
    color: var(--gl-accent);
    transition: opacity 0.2s ease;
}

.footer__copy a:hover {
    opacity: 0.8;
}

/* --- Grid Utilities --- */
.grid {
    display: grid;
    gap: 24px;
}

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

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

    .footer__top {
        flex-direction: column;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    :root {
        --gl-nav-height: 64px;
        --gl-section-pad: var(--gl-section-pad-mobile);
    }

    .container {
        padding: 0 24px;
    }

    .header__inner {
        padding: 0 24px;
    }

    .header__nav {
        position: fixed;
        top: var(--gl-nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 12, 0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        justify-content: center;
        gap: 8px;
        padding: 40px;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s var(--gl-ease-out);
    }

    .header__nav.is-open {
        opacity: 1;
        pointer-events: all;
    }

    .header__link {
        font-size: 18px;
        padding: 14px 24px;
        width: 100%;
        text-align: center;
    }

    .header__toggle {
        display: flex;
    }

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

    .footer__columns {
        flex-direction: column;
        gap: 36px;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
}