/* ===== CSS Variables ===== */
:root {
    --color-bg: #0a0a0f;
    --color-bg-alt: #12121a;
    --color-surface: #1a1a24;
    --color-surface-hover: #22222e;
    --color-border: #2a2a3a;
    --color-text: #e8e8ed;
    --color-text-muted: #8888a0;
    --color-primary: #ff4d6d;
    --color-primary-glow: rgba(255, 77, 109, 0.3);
    --color-accent: #ffd700;
    --color-gradient-start: #ff4d6d;
    --color-gradient-end: #ff8fa3;
    --font-primary: 'Outfit', sans-serif;
    --font-japanese: 'Zen Kaku Gothic New', sans-serif;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-glow: 0 0 40px var(--color-primary-glow);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }

.text-gradient {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px var(--color-primary-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-accent {
    color: var(--color-primary);
}

.main-nav ul {
    display: flex;
    gap: 36px;
}

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.main-nav a:hover {
    color: var(--color-text);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-normal);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(255, 77, 109, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(255, 77, 109, 0.05) 0%, transparent 70%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    opacity: 0.5;
}

.hero h1 {
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header p {
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* ===== Events Section ===== */
.events-section {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.event-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.event-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.event-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.event-placeholder-img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.event-placeholder-img.concert {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.event-placeholder-img.festival {
    background: linear-gradient(135deg, #2d132c 0%, #801336 50%, #c72c41 100%);
}

.event-placeholder-img.music {
    background: linear-gradient(135deg, #0d0d0d 0%, #1a1a2e 50%, #2d2d44 100%);
}

.event-placeholder-img.cultural {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d1f1f 50%, #4a2c2a 100%);
}

.event-category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

.event-content {
    display: flex;
    gap: 16px;
    padding: 20px;
}

.event-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 50px;
    padding: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.event-date .month {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.event-date .day {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

.event-details h3 {
    margin-bottom: 4px;
}

.event-location {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ===== Cities Section ===== */
.cities-section {
    padding: 100px 0;
}

.cities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.city-card {
    position: relative;
    height: 200px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    transition: all var(--transition-normal);
}

.city-card:hover {
    transform: scale(1.02);
}

.city-bg {
    position: absolute;
    inset: 0;
    transition: transform var(--transition-normal);
}

.city-card:hover .city-bg {
    transform: scale(1.1);
}

.city-bg.tokyo {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.city-bg.osaka {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.city-bg.kyoto {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.city-bg.fukuoka {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.city-content {
    position: relative;
    z-index: 1;
    width: 100%;
    padding: 24px;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.city-content h3 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.city-content span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ===== About Section ===== */
.about-section {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content h2 {
    margin-bottom: 24px;
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ===== Contact Section ===== */
.contact-section {
    padding: 100px 0;
}

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

.contact-content p {
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: 16px;
    font-size: 0.95rem;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    color: var(--color-text-muted);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: 24px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 20px;
    }

    .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);
    }

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

    .footer-brand {
        grid-column: span 2;
    }

    .about-stats {
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

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

    .footer-brand {
        grid-column: span 1;
    }
}