:root {
    --xavier-gold: #e8e2c7;
    --xavier-light: #f5f0e0;
    --xavier-glow: rgba(232, 226, 199, 0.08);
    --xavier-border: #3a3a3a;
}

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

body {
    background: #0a0a0c;
    color: #e0e0e0;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
}

.xavier-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.xavier-nav {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(232, 226, 199, 0.15);
}

.xavier-nav .nav-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.xavier-nav a {
    color: var(--xavier-gold);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.xavier-nav a:hover {
    opacity: 0.8;
}

.xavier-hero {
    text-align: center;
    padding: 100px 20px 80px;
    position: relative;
}

.xavier-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: var(--xavier-gold);
    opacity: 0.3;
}

.xavier-hero h1 {
    font-size: 3rem;
    font-weight: 500;
    letter-spacing: -1px;
    color: var(--xavier-light);
    margin-bottom: 20px;
}

.xavier-hero p {
    font-size: 1rem;
    color: #888;
    max-width: 600px;
    margin: 0 auto;
}

.chapter {
    margin: 80px 0;
}

.chapter-number {
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--xavier-gold);
    opacity: 0.5;
    margin-bottom: 12px;
}

.chapter h2 {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--xavier-light);
    letter-spacing: -0.5px;
}

.chapter p {
    color: #aaa;
    margin-bottom: 20px;
    line-height: 1.7;
}

.frame-card {
    background: #111;
    border: 1px solid #222;
    padding: 40px;
    margin: 40px 0;
    border-radius: 4px;
}

.frame-number {
    font-size: 4rem;
    font-weight: 300;
    color: var(--xavier-gold);
    font-family: monospace;
    line-height: 1;
}

.frame-label {
    font-size: 0.7rem;
    color: #666;
    letter-spacing: 2px;
    margin-top: 8px;
}

.frame-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #222;
}

.frame-stat {
    flex: 1;
}

.frame-stat-value {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--xavier-gold);
    font-family: monospace;
}

.frame-stat-label {
    font-size: 0.7rem;
    color: #666;
}

.viz-block {
    background: #0d0d0d;
    padding: 30px;
    margin: 30px 0;
    border-left: 1px solid var(--xavier-gold);
}

.viz-title {
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--xavier-gold);
    margin-bottom: 20px;
}

.damage-bars {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 150px;
    margin: 20px 0;
}

.damage-bar {
    flex: 1;
    background: linear-gradient(to top, var(--xavier-gold), #5a5a5a);
    min-height: 4px;
    border-radius: 2px 2px 0 0;
}

.frame-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.6rem;
    color: #555;
    margin-top: 8px;
}

.tech-card {
    background: #0f0f0f;
    border: 1px solid #222;
    padding: 24px 28px;
    margin: 24px 0;
}

.tech-title {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--xavier-gold);
    margin-bottom: 12px;
}

.tech-text {
    font-family: monospace;
    font-size: 0.9rem;
    color: #ccc;
    line-height: 1.6;
}

.xavier-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
}

.xavier-table th,
.xavier-table td {
    padding: 12px 8px;
    text-align: left;
    border-bottom: 1px solid #222;
}

.xavier-table th {
    color: var(--xavier-gold);
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 1px;
}

.xavier-table td {
    color: #aaa;
    font-size: 0.85rem;
}

.conclusion {
    text-align: center;
    padding: 60px 20px;
    border-top: 1px solid #222;
    margin-top: 60px;
}

.conclusion .conclusion-text {
    color: #aaa;
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.conclusion .conclusion-highlight {
    color: var(--xavier-gold);
    font-size: 1.1rem;
    font-weight: 500;
}

.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--f2p-green), var(--f2p-green-dark));
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: #000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
}

.back-to-top:hover {
    border-color: var(--xavier-gold);
}

footer {
    text-align: center;
    padding: 50px 20px;
    border-top: 1px solid var(--f2p-border);
    color: #6a7080;
    font-size: 0.8rem;
    background: #010103;
}

footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

footer .footer-links a {
    color: #9aa2b5;
    text-decoration: none;
}

footer .footer-links a:hover {
    color: var(--f2p-green);
}

footer p {
    margin: 5px 0;
}

@media (max-width: 700px) {
    .xavier-hero h1 {
        font-size: 2rem;
    }
    .frame-row {
        flex-direction: column;
        gap: 15px;
    }
    .frame-card {
        padding: 25px;
    }
    .chapter h2 {
        font-size: 1.4rem;
    }
}