/* ===== VARIABLES ===== */
:root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-surface: #1a1a1a;
    --color-text: #f5f5f5;
    --color-text-muted: #888888;
    --color-accent: #c41e3a;
    --color-accent-light: #e63950;
    --color-gold: #d4a84b;
    --font-display: 'Noto Serif JP', serif;
    --font-body: 'Inter', sans-serif;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.95), transparent);
    transition: background 0.3s ease;
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(10px);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s ease;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--color-accent);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
    background: radial-gradient(ellipse at center bottom, rgba(196, 30, 58, 0.15) 0%, transparent 60%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23333" fill-opacity="0.3"/></svg>') repeat;
    background-size: 30px 30px;
    opacity: 0.5;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-flag {
    width: 200px;
    height: auto;
    margin: 0 auto 2rem;
    animation: float 4s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(196, 30, 58, 0.4));
}

.hero-flag img {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.hero-title {
    margin-bottom: 1.5rem;
}

.hero-title-jp {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 900;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    text-shadow: 0 0 60px rgba(196, 30, 58, 0.5);
}

.hero-title-en {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: 0.5em;
    color: var(--color-text);
    margin-top: 0.5rem;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-gold);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--color-accent);
    color: var(--color-text);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: 2px solid var(--color-accent);
    transition: all 0.3s ease;
}

.hero-cta:hover {
    background: transparent;
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(196, 30, 58, 0.3);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.hero-scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-muted), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.5; transform: scaleY(0.8); }
}

/* ===== SECTIONS COMMON ===== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: 0.05em;
}

.text-accent {
    color: var(--color-accent);
}

/* ===== ABOUT SECTION ===== */
.about {
    background: var(--color-bg-alt);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-lead {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-gold);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: var(--color-surface);
    border-left: 3px solid var(--color-accent);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* ===== RANKS SECTION ===== */
.ranks {
    background: var(--color-bg);
}

.ranks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.rank-card {
    background: var(--color-surface);
    padding: 2.5rem 1.5rem;
    text-align: center;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.rank-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.rank-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.rank-card:hover::before {
    transform: scaleX(1);
}

.rank-icon {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.rank-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.rank-subtitle {
    font-size: 0.8rem;
    color: var(--color-gold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.rank-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.rank-oyabun .rank-icon { color: var(--color-gold); }

/* ===== RANK BUTTONS ===== */
.rank-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.rank-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 2rem;
    background: var(--color-surface);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 140px;
}

.rank-btn:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.rank-btn.active {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(196, 30, 58, 0.2) 100%);
    box-shadow: 0 10px 30px rgba(196, 30, 58, 0.3);
}

.rank-btn-icon {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-accent);
}

.rank-btn.active .rank-btn-icon {
    color: var(--color-gold);
}

.rank-btn-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.05em;
}

/* ===== PLAYERS CONTAINER ===== */
.players-container {
    min-height: 200px;
}

.players-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    animation: fadeIn 0.4s ease;
}

.players-grid.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== PLAYER CARDS ===== */
.player-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.player-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-accent);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.player-card:hover {
    border-color: var(--color-accent);
    transform: translateX(5px);
    box-shadow: 0 8px 25px rgba(196, 30, 58, 0.2);
}

.player-card:hover::before {
    transform: scaleY(1);
}

.player-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--color-accent);
    flex-shrink: 0;
    background: var(--color-bg);
}

.player-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.player-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.player-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.player-rank {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gold);
}

/* ===== RULES SECTION ===== */
.rules {
    background: var(--color-bg-alt);
}

.rules-content {
    max-width: 800px;
    margin: 0 auto;
}

.rule {
    display: flex;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-surface);
    transition: all 0.3s ease;
}

.rule:hover {
    padding-left: 1rem;
    border-color: var(--color-accent);
}

.rule:last-child {
    border-bottom: none;
}

.rule-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-accent);
    opacity: 0.5;
    line-height: 1;
}

.rule-text h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.rule-text p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ===== JOIN SECTION ===== */
.join {
    background: var(--color-bg);
    position: relative;
}

.join::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(196, 30, 58, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.join-content {
    position: relative;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.join-text {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.join-requirements {
    background: var(--color-surface);
    padding: 2rem;
    margin-bottom: 2.5rem;
    text-align: left;
    border-left: 3px solid var(--color-accent);
}

.join-requirements h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-gold);
}

.join-requirements ul {
    list-style: none;
}

.join-requirements li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-text-muted);
}

.join-requirements li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.join-btn {
    display: inline-block;
    padding: 1.25rem 3rem;
    background: var(--color-accent);
    color: var(--color-text);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border: 2px solid var(--color-accent);
    cursor: pointer;
    transition: all 0.3s ease;
}

.join-btn:hover {
    background: transparent;
    color: var(--color-accent);
    transform: scale(1.02);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-surface);
    padding: 4rem 2rem;
    text-align: center;
}

.footer-logo {
    margin-bottom: 1rem;
}

.footer-logo-jp {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-accent);
}

.footer-logo-en {
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    color: var(--color-text-muted);
}

.footer-text {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color 0.3s ease;
}

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

.footer-copy {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--color-gold);
    font-style: italic;
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.3s ease;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-flag {
        width: 150px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-stats {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }

    .stat {
        flex: 1;
        min-width: 120px;
        padding: 1.5rem 1rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .rule {
        flex-direction: column;
        gap: 1rem;
    }

    .section-container {
        padding: 4rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .ranks-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}