/* ==========================================================================
   AURAX — Layout Grid, Header, Navigation & Section Architecture
   ========================================================================== */

/* ==========================================================================
   1. Containers & Structure
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

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

.container-fluid {
    width: 100%;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* ==========================================================================
   2. Section Backgrounds & Alternating Rhythm
   ========================================================================== */

.section {
    padding-top: var(--section-padding-y);
    padding-bottom: var(--section-padding-y);
    position: relative;
    background-color: var(--color-black);
    color: var(--color-white);
}

.section-sm {
    padding-top: var(--section-padding-sm);
    padding-bottom: var(--section-padding-sm);
}

.section-full {
    padding-top: 0;
    padding-bottom: 0;
    width: 100%;
    position: relative;
}

.section-charcoal {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

.section-graphite {
    background-color: var(--color-graphite);
    color: var(--color-white);
}

/* Architectural Paper & Ivory Light Sections */
.section-ivory {
    background-color: var(--color-ivory);
    color: var(--color-black);
}

.section-ivory h1,
.section-ivory h2,
.section-ivory h3,
.section-ivory h4 {
    color: var(--color-black);
}

.section-ivory p {
    color: #444444;
}

.section-ivory .eyebrow {
    color: var(--color-green);
}

.section-ivory .divider {
    background-color: var(--color-cement);
}

.section-ivory .project-card,
.section-ivory .card {
    background-color: #FFFFFF;
    border-color: var(--color-sand);
    color: var(--color-black);
}

.section-ivory .project-card .project-title {
    color: var(--color-black);
}

.section-ivory .project-card .project-location {
    color: var(--color-ash);
}

/* ==========================================================================
   3. Grids & Split Asymmetry
   ========================================================================== */

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

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

/* Asymmetrical Layouts */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.split-60-40 {
    grid-template-columns: 1.3fr 1fr;
}

.split-40-60 {
    grid-template-columns: 1fr 1.3fr;
}

.align-start {
    align-items: start;
}

.align-center {
    align-items: center;
}

/* Masonry & Portfolio Layout */
.masonry-portfolio {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-xl);
}

.masonry-span-8 {
    grid-column: span 8;
}

.masonry-span-4 {
    grid-column: span 4;
}

.masonry-span-6 {
    grid-column: span 6;
}

.masonry-span-12 {
    grid-column: span 12;
}

/* ==========================================================================
   4. Sticky Architectural Header
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 500;
    transition: background-color var(--transition-base), border-color var(--transition-base), height var(--transition-base), backdrop-filter var(--transition-base);
    background-color: transparent;
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    background-color: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    height: 70px;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header-logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--color-pure-white);
}

.header-nav {
    display: flex;
    align-items: center;
}

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

.nav-link {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-cement);
    position: relative;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--color-pure-white);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-green-light);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.is-active::after {
    width: 100%;
}

.header-cta {
    padding: 10px 22px;
    font-size: 12px;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 600;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-pure-white);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ==========================================================================
   5. Full-Screen Mobile Navigation Overlay
   ========================================================================== */

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #0A0A0A;
    z-index: 550;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: calc(var(--header-height-mobile) + 24px) var(--container-padding) 40px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1), opacity 400ms ease;
}

.mobile-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-nav-links a {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-tight);
    color: var(--color-white);
}

.mobile-nav-links a:hover {
    color: var(--color-green-light);
}

.mobile-nav-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    border-top: 1px solid var(--color-slate);
    padding-top: var(--space-lg);
}

.mobile-contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--color-stone);
}

/* ==========================================================================
   6. Mobile Bottom Action Bar (Fixed on Mobile Only)
   ========================================================================== */

.mobile-cta-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--mobile-cta-height);
    background-color: rgba(14, 14, 14, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--color-slate);
    z-index: 450;
    padding: 0 var(--space-md);
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.mobile-cta-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--color-sand);
    font-family: var(--font-heading);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    height: 100%;
}

.mobile-cta-item:active {
    color: var(--color-green-light);
}

.mobile-cta-item:nth-child(2) {
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   7. Site Footer
   ========================================================================== */

.site-footer {
    background-color: #070707;
    border-top: 1px solid var(--color-slate);
    padding-top: var(--section-padding-y);
    padding-bottom: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-5xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-pure-white);
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-stone);
    max-width: 320px;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.footer-heading {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-pure-white);
    margin-bottom: var(--space-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a,
.footer-contact a {
    font-size: var(--text-sm);
    color: var(--color-stone);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--color-pure-white);
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* Oversized Signature Wordmark in Footer */
.footer-wordmark {
    width: 100%;
    text-align: center;
    user-select: none;
    pointer-events: none;
    overflow: hidden;
    line-height: 0.85;
    margin-bottom: var(--space-2xl);
}

.footer-wordmark span {
    font-family: var(--font-heading);
    font-size: clamp(4.5rem, 15vw, 16rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    color: rgba(255, 255, 255, 0.035);
    display: block;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--space-lg);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: var(--text-xs);
    color: var(--color-ash);
}

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

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

/* ==========================================================================
   8. Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .split,
    .split-60-40,
    .split-40-60 {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .masonry-span-8,
    .masonry-span-4,
    .masonry-span-6 {
        grid-column: span 6;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    .site-header {
        height: var(--header-height-mobile);
    }
    
    .header-nav,
    .header-cta {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .mobile-cta-bar {
        display: flex;
    }
    
    body {
        padding-bottom: var(--mobile-cta-height);
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .masonry-span-8,
    .masonry-span-4,
    .masonry-span-6,
    .masonry-span-12 {
        grid-column: span 12;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-bottom-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}