:root {
    --color-black: #000;
    --color-white: #fff;
    --color-gray-dark: #333;
    --color-gray-medium: #666;
    --color-gray-light: #bbb;
    --color-gray-lighter: #aaa;
    --color-gray-dim: #555;
    --font-display: cursive;
    --font-body: system-ui, -apple-system, sans-serif;
}

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

/* Base */
body {
    background-color: var(--color-black);
    color: var(--color-white);
    font-family: var(--font-body);
    min-height: 100vh;
    line-height: 1.6;
}

/* Layout: Index */
.page-wrapper {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 80px;
    padding: 40px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

body.index-page {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-display);
}

.left-column {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.right-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Layout: Roadmap */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* Typography */
h1 {
    font-family: var(--font-display);
    font-size: 3rem;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 32px;
    color: var(--color-gray-lighter);
}

/* Components: Hero */
.hero-image {
    width: 100%;
}

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

/* Components: Laws Grid (Index) */
.laws {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.law {
    display: flex;
    flex-direction: column;
    font-weight: bold;
    font-size: 1.2rem;
}

.law-prefix {
    color: var(--color-gray-medium);
    margin-bottom: 4px;
}

.law-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.law-subtitle {
    font-family: var(--font-body);
    font-weight: normal;
    font-size: 0.9rem;
    color: var(--color-gray-light);
}

/* Components: Card Button */
.card-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px 16px 16px;
    background: var(--color-black);
    border: 1px solid var(--color-gray-dark);
    border-radius: 12px;
    text-decoration: none;
    color: var(--color-white);
    transition: border-color 0.2s ease;
}

.card-button:hover {
    border-color: var(--color-gray-dim);
}

.card-button .icon {
    width: 70px;
    flex-shrink: 0;
    overflow: hidden;
}

.card-button .icon img {
    width: 140%;
    height: auto;
}

.card-button .text {
    font-size: 1.4rem;
    line-height: 1.3;
}

/* Components: Definition */
.definition {
    text-align: left;
    margin-bottom: 60px;
    max-width: 480px;
}

.definition-term {
    font-size: 1.8rem;
    font-style: italic;
    margin-bottom: 4px;
}

.definition-pronunciation {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-gray-medium);
    margin-bottom: 16px;
}

.definition-text {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-lighter);
}

/* Components: Intro Text */
.intro-text {
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--color-gray-lighter);
    max-width: 520px;
    margin-bottom: 40px;
}

.links {
    margin-top: 0;
}

/* Page: Roadmap */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 0;
}

.back-link {
    color: var(--color-gray-medium);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--color-white);
}

.intro {
    max-width: 700px;
    margin-bottom: 60px;
}

.intro p {
    font-size: 1.1rem;
    color: var(--color-gray-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.intro p:last-child {
    margin-bottom: 0;
}

.section {
    margin-bottom: 80px;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--color-gray-light);
    margin-bottom: 32px;
    max-width: 700px;
}

/* Components: Cards */
.laws-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.baselines-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    background: var(--color-black);
    border: 1px solid var(--color-gray-dark);
    border-radius: 12px;
    padding: 24px;
    transition: border-color 0.2s ease;
}

.card:hover {
    border-color: var(--color-gray-dim);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.card-prefix {
    font-size: 0.85rem;
    color: var(--color-gray-medium);
    font-weight: bold;
}

.card-status {
    font-size: 0.7rem;
    color: var(--color-gray-dim);
    font-style: italic;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.card-description {
    font-size: 0.95rem;
    color: var(--color-gray-light);
    line-height: 1.7;
}

.baseline-card {
    text-align: center;
    padding: 32px 24px;
}

a.baseline-card {
    text-decoration: none;
    color: var(--color-white);
}

.baseline-icon {
    width: 80px;
    height: auto;
    margin-bottom: 16px;
}

.baseline-card .card-title {
    margin-bottom: 16px;
}

.baseline-card .card-status {
    display: block;
    margin-top: 8px;
}

/* Components: Lists */
ul {
    list-style: none;
    margin: 20px 0;
}

ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 1rem;
    color: var(--color-gray-light);
    line-height: 1.7;
}

ul li::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--color-gray-medium);
}

ul li:last-child {
    margin-bottom: 0;
}

/* Components: Masonry Grid */
.masonry-grid {
    columns: 2;
    column-gap: 24px;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 32px;
}

.masonry-subheader {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--color-white);
}

.masonry-item p {
    font-size: 1.1rem;
    color: var(--color-gray-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.masonry-item p:last-child {
    margin-bottom: 0;
}

/* Components: Action Chips */
.action-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.action-chip {
    display: inline-block;
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--color-gray-dark);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--color-gray-light);
}

/* Components: Floating Image */
.float-right-image {
    float: right;
    width: 150px;
    height: auto;
    margin: 0 0 16px 20px;
}

/* Components: Factors Row */
.factors-row {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-top: 20px;
}

.factors-text {
    flex: 1;
}

.factors-text p {
    margin-bottom: 0;
}

.factors-image {
    width: 200px;
    height: auto;
    flex-shrink: 0;
}

/* Responsive */
@media (max-width: 900px) {
    .page-wrapper {
        flex-direction: column;
        gap: 0;
        padding: 20px;
    }

    .left-column,
    .right-column {
        display: contents;
    }

    .page-wrapper h1 {
        order: 1;
        margin-bottom: 30px;
    }

    .page-wrapper > .left-column > .intro-text {
        order: 2;
        margin-bottom: 30px;
    }

    .page-wrapper .definition {
        order: 3;
    }

    .page-wrapper .links {
        order: 4;
        margin-bottom: 40px;
    }

    .page-wrapper .hero-image {
        order: 5;
        margin-bottom: 40px;
    }

    .page-wrapper .laws {
        order: 6;
    }

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

    .laws-grid {
        grid-template-columns: 1fr;
    }

    .baselines-grid {
        grid-template-columns: 1fr;
    }

    .masonry-grid {
        columns: 1;
    }

    .factors-row {
        flex-direction: column;
        gap: 24px;
    }

    .factors-image {
        width: 160px;
        align-self: center;
    }
}

@media (max-width: 600px) {
    .laws {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .container {
        padding: 24px 16px 60px;
    }
}