/* ===== ROOT & VARIABLES ===== */
:root {
    /* Color Palette */
    --color-primary: #2A3040;
    --color-light-bg: #F0EBE4;
    --color-off-white: #E8E0D8;
    --color-tan: #D8C8B8;
    --color-taupe: #D8D0C8;
    --color-sage: #7A9A70;
    --color-teal: #A8C8D8;
    --color-slate: #8A9098;
    --color-dark: #3A3830;
    --color-gray: #4A4A50;

    /* Typography */
    --font-display: "Playfair Display", serif;
    --font-mono: "Space Mono", monospace;
    --font-body: "Source Serif 4", serif;

    /* Grain Opacity (updated by JS on scroll) */
    --grain-opacity: 0.15;

    /* Spacing */
    --spread-padding: clamp(40px, 8vw, 80px);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-light-bg);
    position: relative;
}

/* Film Grain Overlay - Fixed, Covers Entire Viewport */
.film-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg width='4' height='4' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='4' /%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='.5 .3' /%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='4' height='4' fill='%23000000' filter='url(%23noise)' opacity='0.4'/%3E%3C/svg%3E");
    background-size: 4px 4px;
    opacity: var(--grain-opacity);
    mix-blend-mode: multiply;
}

/* ===== TYPOGRAPHY ===== */
h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 7vw, 5rem);
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.02em;
    color: var(--color-primary);
    line-height: 1.2;
}

h2 {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--color-primary);
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--color-primary);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--color-teal);
    border-bottom-color: var(--color-teal);
}

/* ===== SPREAD STRUCTURE ===== */
.spread {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spread-padding) 0;
    position: relative;
    overflow: hidden;
}

.spread-container {
    width: 100%;
    max-width: 100%;
    display: grid;
    align-items: center;
    gap: clamp(20px, 4vw, 60px);
    padding: 0 clamp(20px, 5vw, 60px);
}

/* Left-dominant layout: main 60%, secondary 25%, margins 1fr each */
.spread-container.left-dominant {
    grid-template-columns: 1fr 60% 25% 1fr;
}

/* Right-dominant layout: margin, secondary 25%, main 60%, margin */
.spread-container.right-dominant {
    grid-template-columns: 1fr 25% 60% 1fr;
}

.spread-main {
    grid-column: 2;
}

.spread-secondary {
    grid-column: 3;
}

.spread-container.right-dominant .spread-secondary {
    grid-column: 2;
    order: -1;
}

.spread-container.right-dominant .spread-main {
    grid-column: 3;
}

/* Mobile: single column */
@media (max-width: 768px) {
    .spread-container.left-dominant,
    .spread-container.right-dominant {
        grid-template-columns: 1fr;
        padding: 0 clamp(16px, 5vw, 40px);
    }

    .spread-main,
    .spread-secondary {
        grid-column: 1;
        order: initial;
    }

    .spread {
        padding: var(--spread-padding) 0;
    }
}

/* ===== HERO SECTION ===== */
.spread-hero {
    background: linear-gradient(135deg, var(--color-light-bg) 0%, var(--color-off-white) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-title {
    font-size: clamp(3rem, 12vw, 8rem);
    font-weight: 400;
    font-style: italic;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--color-slate);
    margin-bottom: 2rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-primary);
    max-width: 500px;
    line-height: 1.8;
    font-style: italic;
}

/* ===== ABOUT SECTION ===== */
.spread-about {
    background-color: var(--color-light-bg);
}

.quote {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-style: italic;
    color: var(--color-slate);
    line-height: 1.8;
    margin-bottom: 2rem;
    padding-left: 2rem;
    border-left: 3px solid var(--color-teal);
}

/* ===== PROCESS SECTION ===== */
.spread-process {
    background-color: var(--color-taupe);
    color: var(--color-dark);
}

.spread-process h2 {
    color: var(--color-dark);
}

.spread-process p {
    color: var(--color-dark);
}

.process-list {
    list-style: none;
    padding: 0;
    font-family: var(--font-mono);
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    line-height: 2.2;
}

.process-list li {
    color: var(--color-dark);
    position: relative;
    padding-left: 1.5rem;
}

.process-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-sage);
}

/* ===== PROJECT SECTIONS ===== */
.spread-project {
    background: linear-gradient(135deg, var(--color-light-bg) 0%, var(--color-taupe) 100%);
}

.project-title {
    font-size: clamp(1.4rem, 3vw, 2.4rem);
}

.project-year {
    font-family: var(--font-mono);
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    color: var(--color-slate);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.project-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
}

.project-link:hover {
    background-color: var(--color-primary);
    color: var(--color-light-bg);
    border-color: var(--color-primary);
}

.project-image-placeholder {
    width: 100%;
    aspect-ratio: 3 / 4;
    background: linear-gradient(45deg, var(--color-teal), var(--color-sage));
    opacity: 0.6;
    animation: subtle-pulse 4s ease-in-out infinite;
}

@keyframes subtle-pulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.75;
    }
}

/* ===== CONTACT SECTION ===== */
.spread-contact {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
    color: var(--color-light-bg);
}

.spread-contact h2 {
    color: var(--color-light-bg);
}

.spread-contact p {
    color: var(--color-light-bg);
}

.contact-info {
    margin-top: 2rem;
    font-family: var(--font-mono);
}

.contact-info p {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    margin-bottom: 1rem;
}

.contact-info a {
    color: var(--color-teal);
    border-bottom-color: var(--color-teal);
}

.contact-info a:hover {
    color: var(--color-light-bg);
    border-bottom-color: var(--color-light-bg);
}

.footer-note {
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    color: var(--color-slate);
    font-style: italic;
    margin-top: 4rem;
}

/* ===== ANIMATIONS & TRANSITIONS ===== */
.spread {
    animation: fade-in 0.8s ease-out forwards;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Parallax effect on text */
.spread-main {
    animation: float-up 0.6s ease-out 0.1s backwards;
}

@keyframes float-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Link underline animation */
a {
    position: relative;
    background: linear-gradient(to right, currentColor 0%, currentColor 100%);
    background-size: 0% 1px;
    background-position: 0 100%;
    background-repeat: no-repeat;
    transition: background-size 0.3s ease;
}

a:hover {
    background-size: 100% 1px;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 1024px) {
    .spread-container.left-dominant,
    .spread-container.right-dominant {
        grid-template-columns: 1fr;
    }

    .spread-main,
    .spread-secondary {
        grid-column: 1;
    }

    .spread-container.right-dominant .spread-main {
        grid-column: 1;
    }

    .spread-container.right-dominant .spread-secondary {
        grid-column: 1;
        order: -1;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: clamp(2rem, 5vw, 3rem);
    }

    h2 {
        font-size: clamp(1.2rem, 4vw, 1.8rem);
    }

    .hero-title {
        font-size: clamp(2rem, 10vw, 4rem);
    }

    .quote {
        padding-left: 1rem;
        font-size: clamp(1rem, 2vw, 1.3rem);
    }

    .project-link {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .spread {
        min-height: auto;
        padding: clamp(40px, 6vw, 60px) 0;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .film-grain {
        display: none;
    }

    .spread {
        page-break-inside: avoid;
    }
}