/* ==========================================================================
   Layout — header, footer, containers, sections
   ========================================================================== */

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

.section {
    padding: var(--section-pad) 0;
}

/* Hairline section divider — full-width, barely-there copper */
.section + .section {
    border-top: 1px solid var(--border-color);
}

/* --- Header ------------------------------------------------------------------ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 900;
    background: rgba(7, 8, 9, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base);
}

.header.is-scrolled {
    border-bottom-color: var(--border-color);
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--sp-6);
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Wordmark — ultra-light, wide tracking, copper */
.logo {
    font-family: var(--font-display);
    font-weight: 200;
    font-size: 1.1rem;
    letter-spacing: var(--tracking-wordmark);
    text-transform: uppercase;
    color: var(--accent);
    /* optical correction for the wide tracking on the last letter */
    margin-right: calc(-1 * var(--tracking-wordmark));
}

.logo:hover {
    color: var(--accent-bright);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--sp-8);
}

.nav a {
    font-size: var(--fs-micro);
    font-weight: 400;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: var(--sp-2) 0;
    border-bottom: 1px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav a:hover,
.nav a.is-active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

/* Mobile menu trigger */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp-2);
    color: var(--text-primary);
}

.menu-toggle svg {
    display: block;
}

/* --- Mobile menu overlay -------------------------------------------------------- */

.overlay-bg {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    z-index: 950;
}

.overlay-bg.is-open {
    opacity: 1;
    pointer-events: auto;
}

.menu-overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(20rem, 85vw);
    background: var(--bg-card);
    border-left: 1px solid var(--border-color);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: 960;
    padding: var(--sp-16) var(--sp-8);
    display: flex;
    flex-direction: column;
}

.menu-overlay.is-open {
    transform: none;
}

.menu-overlay nav {
    display: flex;
    flex-direction: column;
    gap: var(--sp-6);
}

.menu-overlay nav a {
    font-family: var(--font-display);
    font-weight: 200;
    font-size: 1.3rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-primary);
    padding-left: var(--sp-4);
    border-left: 1px solid var(--border-accent);
}

.menu-overlay nav a:hover {
    color: var(--accent);
}

.menu-close {
    position: absolute;
    top: var(--sp-4);
    right: var(--sp-4);
    background: none;
    border: none;
    font-size: 1.75rem;
    font-weight: 200;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--sp-2);
    line-height: 1;
}

.menu-close:hover {
    color: var(--accent);
}

/* --- Footer ------------------------------------------------------------------------ */

.footer {
    border-top: 1px solid var(--border-color);
    padding: var(--sp-16) 0 var(--sp-8);
    margin-top: var(--section-pad);
}

.footer-grid {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--sp-6);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--sp-12);
}

.footer-brand {
    font-family: var(--font-display);
    font-weight: 200;
    font-size: 1rem;
    letter-spacing: var(--tracking-wordmark);
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--sp-4);
}

.footer-tagline {
    font-size: var(--fs-small);
    color: var(--text-muted);
    max-width: 22rem;
}

.footer h4 {
    font-family: var(--font-body);
    font-size: var(--fs-micro);
    font-weight: 500;
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--sp-4);
}

.footer a {
    display: block;
    font-size: var(--fs-small);
    color: var(--text-secondary);
    margin-bottom: var(--sp-2);
}

.footer a:hover {
    color: var(--accent);
}

.footer p {
    font-size: var(--fs-small);
    color: var(--text-secondary);
    margin-bottom: var(--sp-2);
}

.footer-bottom {
    max-width: var(--container);
    margin: var(--sp-12) auto 0;
    padding: var(--sp-6) var(--sp-6) 0;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--sp-2);
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.footer-bottom a {
    display: inline;
    color: var(--text-muted);
    font-size: var(--fs-micro);
}