@layer base, layout, components, utilities;

@layer base {
    :root {
        --color-basalt: #121212;
        --color-mist: #F5F5F5;
        --color-scoria: #7B3F3F;
        --color-tangerine: #FF8C00;
        
        --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
        --font-mono: 'Roboto Mono', monospace;
        
        --spacing-unit: 1rem;
        --container-padding: 5vw;
        
        background-color: var(--color-mist);
        color: var(--color-basalt);
        font-family: var(--font-main);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        overflow-x: hidden;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    ul {
        list-style: none;
    }

    h1, h2, h3, h4 {
        line-height: 1.1;
        text-transform: uppercase;
        font-weight: 700;
    }

    .mono {
        font-family: var(--font-mono);
        font-size: 0.8rem;
        letter-spacing: 0.1em;
    }
}

@layer layout {
    .container {
        padding-inline: var(--container-padding);
    }

    header#main-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        padding: 2rem var(--container-padding);
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
        mix-blend-mode: difference;
        color: white;
    }

    .logo {
        font-size: 1.5rem;
        font-weight: 900;
        letter-spacing: -0.02em;
    }

    #menu-toggle {
        background: none;
        border: none;
        color: inherit;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .burger {
        width: 24px;
        height: 12px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .burger span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: currentColor;
        transition: transform 0.3s ease;
    }

    /* Nav Overlay */
    #overlay-nav {
        position: fixed;
        inset: 0;
        background-color: var(--color-basalt);
        color: var(--color-mist);
        z-index: 900;
        display: grid;
        place-items: center;
        clip-path: circle(0% at 95% 5%);
        transition: clip-path 0.8s cubic-bezier(0.85, 0, 0.15, 1);
    }

    body.nav-open #overlay-nav {
        clip-path: circle(150% at 95% 5%);
    }

    .nav-links {
        text-align: center;
    }

    .nav-links li {
        margin-block: 1rem;
        overflow: hidden;
    }

    .nav-links a {
        font-size: clamp(3rem, 8vw, 6rem);
        font-weight: 800;
        display: block;
        transition: transform 0.3s ease, opacity 0.3s ease;
        position: relative;
    }

    .nav-links a:hover {
        transform: italic;
        opacity: 0.7;
    }

    .nav-meta {
        position: absolute;
        bottom: 2rem;
        left: var(--container-padding);
        right: var(--container-padding);
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
    }

    /* Sections */
    section {
        padding-block: 8rem;
    }

    #hero {
        height: 100vh;
        display: flex;
        align-items: center;
        position: relative;
        padding-block: 0;
        background-color: var(--color-basalt);
        color: var(--color-mist);
    }

    .hero-bg {
        position: absolute;
        inset: 0;
        background-image: url('https://images.unsplash.com/photo-1506744038136-46273834b3fb?q=80&w=2000&auto=format&fit=crop');
        background-size: cover;
        background-position: center;
        opacity: 0.4;
        filter: grayscale(1);
    }

    .hero-content {
        position: relative;
        z-index: 10;
        padding-inline: var(--container-padding);
    }

    #hero h1 {
        font-size: clamp(3rem, 10vw, 8rem);
        line-height: 0.9;
        margin-bottom: 2rem;
    }

    .indent {
        padding-left: 20vw;
    }

    /* Manifesto */
    .manifesto-grid {
        display: grid;
        grid-template-columns: 1fr 2fr;
        gap: 4rem;
    }

    .manifesto-grid h2 {
        font-size: 2.5rem;
        margin-bottom: 2rem;
        word-break: keep-all;
    }

    .manifesto-grid p {
        font-size: 1.2rem;
        max-width: 600px;
        opacity: 0.8;
    }
}

@layer components {
    /* Asymmetrical Grid */
    .asym-grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 2rem;
        margin-top: 4rem;
        container-type: inline-size;
    }

    .grid-item {
        position: relative;
    }

    .grid-item.large { grid-column: 1 / 8; }
    .grid-item.small { grid-column: 9 / 13; align-self: center; }
    .grid-item.medium { grid-column: 4 / 10; margin-top: -5rem; }

    .item-img {
        aspect-ratio: 4/5;
        background-size: cover;
        background-position: center;
        background-color: #ddd;
        transition: filter 0.5s ease;
        filter: grayscale(0.5);
    }

    .grid-item:hover .item-img {
        filter: grayscale(0);
    }

    .item-info {
        margin-top: 1rem;
    }

    .view-all {
        margin-top: 4rem;
        text-align: right;
    }

    .more-link {
        font-weight: 700;
        border-bottom: 2px solid var(--color-basalt);
        padding-bottom: 0.5rem;
    }

    /* Event List */
    .event-list {
        margin-top: 4rem;
        border-top: 1px solid rgba(0,0,0,0.1);
    }

    .event-item {
        display: grid;
        grid-template-columns: 1fr 3fr 1fr;
        padding-block: 2.5rem;
        border-bottom: 1px solid rgba(0,0,0,0.1);
        align-items: center;
        transition: background-color 0.3s ease;
    }

    .event-item:hover {
        background-color: rgba(0,0,0,0.02);
    }

    .event-title h4 {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .rsvp-btn {
        display: inline-block;
        padding: 0.8rem 2rem;
        background-color: var(--color-basalt);
        color: var(--color-mist);
        font-weight: 700;
        transition: transform 0.2s ease;
    }

    .rsvp-btn:hover {
        transform: translateY(-3px);
    }
}

@layer utilities {
    #main-footer {
        background-color: var(--color-basalt);
        color: var(--color-mist);
        padding-block: 6rem 2rem;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 4rem;
        margin-bottom: 6rem;
    }

    .footer-logo h2 {
        font-size: 3rem;
    }

    .footer-newsletter form {
        display: flex;
        margin-top: 1rem;
        border-bottom: 1px solid var(--color-mist);
    }

    .footer-newsletter input {
        background: none;
        border: none;
        color: white;
        padding: 0.5rem 0;
        flex-grow: 1;
    }

    .footer-newsletter button {
        background: none;
        border: none;
        color: white;
        font-weight: 700;
        cursor: pointer;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        opacity: 0.5;
        font-size: 0.7rem;
    }

    @media (max-width: 768px) {
        .manifesto-grid, .footer-grid, .event-item {
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        
        .grid-item.large, .grid-item.small, .grid-item.medium {
            grid-column: 1 / 13;
            margin-top: 0;
        }

        .indent {
            padding-left: 0;
        }
    }
}