@layer base, layout, components, theme;

@layer base {
    :root {
        --bg-color: oklch(15% 0.02 240);
        --text-color: oklch(95% 0.01 240);
        --accent-color: oklch(70% 0.15 40);
        --header-bg: oklch(20% 0.03 240 / 0.8);
        --card-bg: oklch(25% 0.02 240 / 0.4);
        --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    }

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

    body {
        background-color: var(--bg-color);
        color: var(--text-color);
        font-family: var(--font-family);
        line-height: 1.6;
        background-image: 
            radial-gradient(circle at 50% 0%, oklch(25% 0.05 240) 0%, transparent 50%),
            url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3%3Ffilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
        background-attachment: fixed;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
}

@layer layout {
    header {
        padding: 80px 0 40px;
        text-align: center;
        background: linear-gradient(to bottom, var(--header-bg), transparent);
    }

    header h1 {
        font-size: clamp(2.5rem, 5vw, 4rem);
        font-weight: 800;
        letter-spacing: -1px;
        margin-bottom: 10px;
        background: linear-gradient(45deg, oklch(90% 0.05 40), oklch(70% 0.15 40));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .subtitle {
        font-size: 1.2rem;
        color: oklch(70% 0.02 240);
        font-weight: 300;
    }

    .filter-bar {
        position: sticky;
        top: 0;
        z-index: 100;
        background: oklch(15% 0.02 240 / 0.8);
        backdrop-filter: blur(20px);
        padding: 20px 0;
        border-bottom: 1px solid oklch(100% 0 0 / 0.05);
        margin-bottom: 60px;
    }

    .filter-bar .container {
        display: flex;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .market-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
        gap: 40px;
        padding-bottom: 100px;
    }

    footer {
        padding: 60px 0;
        text-align: center;
        border-top: 1px solid oklch(100% 0 0 / 0.05);
        color: oklch(50% 0.01 240);
    }
}

@layer components {
    .filter-btn {
        background: oklch(100% 0 0 / 0.05);
        border: 1px solid oklch(100% 0 0 / 0.1);
        color: var(--text-color);
        padding: 10px 24px;
        border-radius: 30px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 0.95rem;
        font-weight: 500;
    }

    .filter-btn:hover {
        background: oklch(100% 0 0 / 0.1);
        border-color: oklch(100% 0 0 / 0.2);
    }

    .filter-btn.active {
        background: var(--accent-color);
        color: oklch(15% 0.02 240);
        border-color: var(--accent-color);
        box-shadow: 0 0 20px oklch(70% 0.15 40 / 0.3);
    }
}

@layer theme {
    @media (max-width: 768px) {
        header {
            padding: 60px 0 30px;
        }
        .market-grid {
            grid-template-columns: 1fr;
        }
    }
}