:root {
    --bg: #121214;
    --card-bg: rgba(30, 30, 35, 0.8);
    --text-primary: #ededed;
    --text-secondary: #a0a0b0;
    --accent: #ff6600;
    /* Mengxi Orange, but used sparingly */
    --accent-blue: #4d94ff;
    --ui-border: rgba(255, 255, 255, 0.1);
    --font-serif: 'EB Garamond', serif;
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: crosshair;
}

/* Semi-structured Grid Background */
.structure-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 200vw;
    height: 100vh;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
    transform: perspective(1000px) rotateX(20deg) translateY(-200px);
    transition: transform 0.5s ease-out;
}

.scrolling-container {
    padding: 100px 5vw;
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: flex-start;
}

/* Hard vs Soft Headers */
.header-main {
    width: 100%;
    margin-bottom: 80px;
    position: relative;
}

.site-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.03em;
}

.site-subtitle {
    font-family: var(--font-mono);
    color: var(--accent-blue);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-top: 1rem;
}

/* Semi-structured Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--ui-border);
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(77, 148, 255, 0.1);
}

.card[data-type="soft"] {
    border-radius: 40px 10px 40px 5px;
    border-style: dashed;
}

.card[data-type="hard"] {
    border-radius: 0;
}

.card-label {
    position: absolute;
    top: -10px;
    left: 20px;
    background: var(--accent-blue);
    color: white;
    padding: 2px 10px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
}

h2,
h3 {
    font-family: var(--font-serif);
    margin-bottom: 1.5rem;
}

.quote {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.5rem;
    color: var(--text-secondary);
    border-left: 2px solid var(--accent);
    padding-left: 20px;
    margin: 2rem 0;
}

/* Timeline specific */
.timeline-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 20px;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
}

.year {
    font-family: var(--font-mono);
    color: var(--accent-blue);
}

/* Poem specific */
.poem {
    font-family: var(--font-serif);
    line-height: 1.8;
    white-space: pre-line;
    font-size: 1.1rem;
}

/* DETAILS GRID & CARDS */
.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.concept-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 4px 12px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    border: 1px solid var(--accent);
    margin: 0.2rem;
    border-radius: 2px;
}

.expression-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    transition: all 0.3s;
}

.expression-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--accent-blue);
}

.expression-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-blue);
    margin-bottom: 1rem;
    display: block;
    text-transform: uppercase;
}

.prediction-table {
    width: 100%;
    font-size: 0.85rem;
    border-collapse: collapse;
    margin-top: 1rem;
}

.prediction-table td {
    padding: 10px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.prediction-num {
    color: var(--accent-blue);
    font-family: var(--font-mono);
    width: 30px;
    font-weight: bold;
}

/* RESPONSIVE TWEAKS */
@media (max-width: 768px) {
    .details-grid {
        grid-template-columns: 1fr;
    }

    .header-main .site-title {
        font-size: 3rem;
    }
}

/* UI Elements */
.mode-toggle {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 100;
}

.btn-mode {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 10px 20px;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-mode:hover {
    background: var(--accent-blue);
    color: black;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Adaptive Background Overlay */
.overlay-vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent, rgba(0, 0, 0, 0.4));
    pointer-events: none;
    z-index: 5;
}

/* Half Philosophy - The Deep Question */
.half-interrogation {
    border: 2px solid #333;
    background: linear-gradient(135deg, #1a1a1c 0%, #0d0d0e 100%);
    position: relative;
    overflow: hidden;
    padding: 3rem !important;
}

.half-interrogation::before {
    content: "?";
    position: absolute;
    right: -10px;
    bottom: -80px;
    font-size: 20rem;
    font-family: var(--font-serif);
    color: rgba(255, 255, 255, 0.02);
    pointer-events: none;
}

.question-list {
    list-style: none;
    margin: 2rem 0;
}

.q-item {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    margin-bottom: 1.2rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 40px;
    line-height: 1.4;
}

.q-item::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.improv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.improv-column h4 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-pill {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.6rem;
    text-transform: uppercase;
}

.pill-improvable {
    background: rgba(77, 148, 255, 0.2);
    color: var(--accent-blue);
}

.pill-fixed {
    background: rgba(255, 0, 0, 0.1);
    color: #ff4444;
}

.improv-list {
    list-style: none;
    font-size: 0.9rem;
}

.improv-list li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 20px;
}

.improv-list li::after {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.5;
}

@media (max-width: 900px) {
    .improv-grid {}
}

/* Philosophy Table */
.phil-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.phil-table th,
.phil-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--ui-border);
}

.phil-table th {
    color: var(--accent-blue);
    font-weight: normal;
}

/* Personality Matrix */
.personality-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.p-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--ui-border);
    padding: 25px;
    border-radius: 4px;
    transition: transform 0.3s;
}

.p-card:hover {
    transform: scale(1.02);
    border-color: var(--accent-blue);
}

.p-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-blue);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.p-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Personality Tags */
.p-tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.6rem;
    border-radius: 20px;
    margin-bottom: 10px;
    font-weight: bold;
}

.tag-romantic {
    background: rgba(255, 102, 0, 0.1);
    color: #ff6600;
}

.tag-sober {
    background: rgba(77, 148, 255, 0.1);
    color: var(--accent-blue);
}

.tag-analyst {
    background: rgba(157, 78, 221, 0.1);
    color: #9d4edd;
}

.tag-architect {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* Governance Model */
.governance-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    background: var(--ui-border);
    margin: 30px 0;
}

.gov-item {
    background: var(--bg);
    padding: 30px;
}

.gov-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    display: block;
    margin-bottom: 15px;
    opacity: 0.5;
}

.gov-content h4 {
    font-family: var(--font-serif);
    margin-bottom: 10px;
    color: var(--accent);
}

.gov-content p {
    font-size: 0.85rem;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .governance-grid {
        grid-template-columns: 1fr;
    }
}