:root {
    --equal-love: #ea6c81;
    --equal-love-rgb: 234, 108, 129;
    --not-equal-me: #79ccbd;
    --not-equal-me-rgb: 121, 204, 189;
    --nearly-equal-joy: #ffdf6a;
    --nearly-equal-joy-rgb: 255, 223, 106;
    --unknown: #999999;
    --unknown-rgb: 153, 153, 153;


    --bg-primary: #f8f9fc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-hover: #f0f2f8;

    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

    --border-radius: 16px;
    --border-radius-sm: 10px;
}

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

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Header */
.header {
    background: var(--bg-secondary);
    padding: 2rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.header h1 .logo-love {
    color: var(--equal-love);
}

.header h1 .logo-me {
    color: var(--not-equal-me);
}

.header h1 .logo-joy {
    color: var(--nearly-equal-joy);
}

.header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Filter Tabs */
.filter-container {
    padding: 1rem;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.filter-btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    border-color: var(--text-light);
    background: var(--bg-hover);
}

.filter-btn.active {
    color: white;
    border-color: transparent;
}

.filter-btn[data-group="all"].active {
    background: linear-gradient(135deg, var(--equal-love), var(--not-equal-me), var(--nearly-equal-joy));
}

.filter-btn[data-group="equal-love"].active {
    background: var(--equal-love);
}

.filter-btn[data-group="not-equal-me"].active {
    background: var(--not-equal-me);
}

.filter-btn[data-group="nearly-equal-joy"].active {
    background: var(--nearly-equal-joy);
    color: var(--text-primary);
}

.filter-btn .count {
    background: rgba(0, 0, 0, 0.1);
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
    font-size: 0.75rem;
}

.filter-btn.active .count {
    background: rgba(255, 255, 255, 0.3);
}

.filter-btn[data-group="nearly-equal-joy"].active .count {
    background: rgba(0, 0, 0, 0.15);
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.stat-card.equal-love::before {
    background: var(--equal-love);
}

.stat-card.not-equal-me::before {
    background: var(--not-equal-me);
}

.stat-card.nearly-equal-joy::before {
    background: var(--nearly-equal-joy);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.stat-card.equal-love .stat-number {
    color: var(--equal-love);
}

.stat-card.not-equal-me .stat-number {
    color: var(--not-equal-me);
}

.stat-card.nearly-equal-joy .stat-number {
    color: var(--nearly-equal-joy);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-weight: 500;
}

/* Event List */
.event-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1rem;
}

.event-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.event-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.event-card.equal-love:hover {
    box-shadow: 0 8px 30px rgba(var(--equal-love-rgb), 0.2);
}

.event-card.not-equal-me:hover {
    box-shadow: 0 8px 30px rgba(var(--not-equal-me-rgb), 0.25);
}

.event-card.nearly-equal-joy:hover {
    box-shadow: 0 8px 30px rgba(var(--nearly-equal-joy-rgb), 0.3);
}

.event-card a {
    display: block;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
}

.event-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.group-badge {
    padding: 0.35rem 0.9rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.group-badge.equal-love {
    background: rgba(var(--equal-love-rgb), 0.15);
    color: var(--equal-love);
}

.group-badge.not-equal-me {
    background: rgba(var(--not-equal-me-rgb), 0.2);
    color: var(--not-equal-me);
}

.group-badge.nearly-equal-joy {
    background: rgba(var(--nearly-equal-joy-rgb), 0.25);
    color: var(--nearly-equal-joy);
}

.group-badge.unknown {
    background: rgba(var(--unknown-rgb), 0.15);
    color: var(--unknown);
}

.event-date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-left: auto;
}

.event-name {
    font-size: 1rem;
    font-weight: 500;
    line-clamp: 2;
    line-height: 1.6;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.event-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.shop-link {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: color 0.2s;
}

.event-card:hover .shop-link {
    color: var(--equal-love);
}

.event-card.not-equal-me:hover .shop-link {
    color: var(--not-equal-me);
}

.event-card.nearly-equal-joy:hover .shop-link {
    color: var(--nearly-equal-joy);
}

.shop-link svg {
    width: 16px;
    height: 16px;
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    gap: 1rem;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--equal-love);
    border-right-color: var(--not-equal-me);
    border-bottom-color: var(--nearly-equal-joy);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem;
    }

    .header h1 {
        font-size: 1.3rem;
    }

    .event-list {
        grid-template-columns: 1fr;
    }

    .stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .stat-card {
        padding: 1rem 0.5rem;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .filter-btn {
        padding: 0.5rem 0.9rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }

    .event-card a {
        padding: 1.2rem;
    }

    .event-list {
        grid-template-columns: 1fr;
    }
}

/* Scroll to top button */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--equal-love);
    border-color: var(--equal-love);
}

.scroll-top svg {
    width: 22px;
    height: 22px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-light);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.footer-credit {
    color: var(--text-light);
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.footer-link:hover {
    background: var(--bg-secondary);
    border-color: var(--text-light);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.footer-link svg {
    flex-shrink: 0;
}