/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
    --navy-deep: #FAFBFD;
    --navy: #F1F2F5;
    --navy-light: #E8E9ED;
    --navy-lighter: #DEE0E5;
    --gold: #9A7B1A;
    --gold-dim: rgba(154, 123, 26, 0.08);
    --gold-glow: rgba(154, 123, 26, 0.15);
    --text-primary: #1A1F2E;
    --text-secondary: #505868;
    --text-muted: #8A94A6;
    --border: rgba(0, 0, 0, 0.08);
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Outfit', system-ui, sans-serif;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--navy-deep);
    color: var(--text-primary);
    line-height: 1.7;
    font-weight: 300;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

::selection {
    background: var(--gold);
    color: var(--navy-deep);
}

a {
    color: var(--gold);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: var(--text-primary);
}

img {
    max-width: 100%;
    display: block;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
}

/* ============================================
   SKIP LINK (ACCESSIBILITY)
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 10000;
    padding: 0.75rem 1.5rem;
    background: var(--gold);
    color: var(--navy-deep);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.skip-link:focus {
    top: 1rem;
    color: var(--navy-deep);
}

/* ============================================
   FOCUS STYLES (ACCESSIBILITY)
   ============================================ */
:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: background-color 0.4s ease, padding 0.4s ease, backdrop-filter 0.4s ease;
}
.nav.scrolled {
    background-color: rgba(250, 251, 253, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}
.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}
.nav-logo span {
    color: var(--gold);
}
.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}
.nav-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 2px;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width 0.3s ease;
}
.nav-links a:hover {
    color: var(--text-primary);
}
.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--text-primary);
    margin: 6px 0;
    transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   CONTENT SECTIONS (shared by subpages)
   ============================================ */
.content-section {
    padding: clamp(4rem, 8vw, 7rem) 0;
    position: relative;
}

.content-section + .content-section {
    border-top: 1px solid var(--border);
}

.content-section.alt-bg {
    background: var(--navy);
}

.section-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 1.5rem;
}

.section-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 1.5rem;
}

.section-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 750px;
    margin-bottom: 3rem;
}

/* ============================================
   BACK LINK (portfolio pages)
   ============================================ */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color 0.3s ease;
    margin-bottom: 2rem;
}
.back-link:hover {
    color: var(--gold);
}
.back-link-arrow {
    transition: transform 0.3s ease;
}
.back-link:hover .back-link-arrow {
    transform: translateX(-4px);
}

/* ============================================
   PROJECT HEADER (portfolio pages)
   ============================================ */
.project-header {
    padding: clamp(8rem, 12vw, 12rem) 0 clamp(3rem, 5vw, 4rem);
}

.project-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 1.5rem;
}

.project-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.project-subtitle {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 750px;
}

/* ============================================
   HERO IMAGE (portfolio pages)
   ============================================ */
.project-hero {
    width: 100%;
    overflow: hidden;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.project-hero img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
}

/* ============================================
   TIMELINE IMAGE (portfolio pages)
   ============================================ */
.timeline-image {
    width: 100%;
    border: 1px solid var(--border);
    margin-top: 2rem;
}

.timeline-image img {
    width: 100%;
    height: auto;
}

/* ============================================
   IMAGE GALLERY (portfolio pages)
   ============================================ */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

.gallery-item {
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.gallery-item:hover {
    border-color: var(--gold-glow);
    transform: translateY(-2px);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.gallery-item:hover img {
    transform: scale(1.03);
}

/* ============================================
   PROJECT NAVIGATION (portfolio pages)
   ============================================ */
.project-nav {
    padding: clamp(3rem, 5vw, 5rem) 0;
    border-top: 1px solid var(--border);
}

.project-nav-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.project-nav-link {
    display: block;
    padding: clamp(1.5rem, 2.5vw, 2.5rem);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.project-nav-link:hover {
    border-color: var(--gold-glow);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.project-nav-link.next {
    text-align: right;
}

.project-nav-direction {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.5rem;
}

.project-nav-title {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 500;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2.5rem;
    border: 1px solid var(--gold);
    color: var(--gold);
    background: transparent;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gold);
    transition: left 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    z-index: -1;
}
.btn:hover {
    color: var(--navy-deep);
}
.btn:hover::before {
    left: 0;
}
.btn-arrow {
    transition: transform 0.3s ease;
}
.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ============================================
   CTA SECTION (shared by subpages)
   ============================================ */
.cta-section {
    padding: clamp(5rem, 10vw, 8rem) 0;
    text-align: center;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--gold));
}

.cta-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.cta-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
}
.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer-brand {
    font-family: var(--font-display);
    font-size: 0.95rem;
    color: var(--text-secondary);
}
.footer-brand span {
    color: var(--gold);
}
.footer-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.footer-links a {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}
.footer-links a:hover {
    color: var(--text-secondary);
}
.footer-copy {
    font-size: 0.75rem;
    color: var(--text-muted);
    width: 100%;
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.9s cubic-bezier(0.23, 1, 0.32, 1),
                transform 0.9s cubic-bezier(0.23, 1, 0.32, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(250, 251, 253, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
    }
    .nav-links.active {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
    .image-gallery {
        grid-template-columns: 1fr;
    }
    .image-gallery.gallery-2col {
        grid-template-columns: 1fr;
    }
    .project-nav-inner {
        grid-template-columns: 1fr;
    }
    .project-nav-link.next {
        text-align: left;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .image-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}