:root {
    --bg-color: #ffffff;
    --text-color: #191c1f;
    --secondary-text: #636e72;
    --card-bg: #f7f9fc;
    --accent-color: #0075eb;
    --accent-bg: rgba(0, 117, 235, 0.08);
    --border-color: #f1f2f3;
    --hover-bg: #f1f2f3;
    --nav-bg: rgba(255, 255, 255, 0.8);

    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 16px;
    --radius-xs: 12px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 10px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.04);

    /* Chart Colors */
    --chart-1: #1971ff;
    --chart-2: #ff3b30;
    --chart-3: #34c759;
    --chart-4: #af52de;
    --chart-5: #ff9500;
}

@media (prefers-color-scheme: dark) {
    :root:not(.light-mode) {
        --bg-color: #000000;
        --text-color: #ffffff;
        --secondary-text: #8b949e;
        --card-bg: #0d1117;
        --nav-bg: rgba(0, 0, 0, 0.85);
        --accent-color: #0075eb;
        --border-color: #21262d;
        --hover-bg: #21262d;
        --accent-bg: rgba(0, 117, 235, 0.15);
        --shadow-sm: 0 4px 12px rgba(0,0,0,0.3);
        --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
        --shadow-lg: 0 16px 40px rgba(0,0,0,0.5);
    }
}

html.dark-mode body, body.dark-mode {
    --bg-color: #000000;
    --text-color: #ffffff;
    --secondary-text: #8b949e;
    --card-bg: #0d1117;
    --nav-bg: rgba(0, 0, 0, 0.85);
    --accent-color: #0075eb;
    --border-color: #21262d;
    --hover-bg: #21262d;
    --accent-bg: rgba(0, 117, 235, 0.15);
    --shadow-sm: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 16px 40px rgba(0,0,0,0.5);
}

body.light-mode {
    --bg-color: #ffffff;
    --text-color: #191c1f;
    --secondary-text: #636e72;
    --card-bg: #f7f9fc;
    --accent-color: #0075eb;
    --border-color: #f1f2f3;
    --hover-bg: #f1f2f3;
    --nav-bg: rgba(255, 255, 255, 0.8);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
    font-family: "SF Pro Display", "SF Pro Text", "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.5;
    overflow-x: hidden;
    padding-bottom: env(safe-area-inset-bottom);
    letter-spacing: -0.01em;
}

nav {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 1.5rem;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-content {
    width: 100%;
    max-width: 1000px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.8px;
    cursor: pointer;
}

.nav-actions { display: flex; gap: 12px; }

.nav-actions button, .share-btn, .chart-actions button, .header-controls button, .chart-cycle-btn {
    background: var(--card-bg);
    border: none;
    color: var(--text-color);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.nav-actions button:hover, .share-btn:hover, .chart-actions button:hover, .header-controls button:hover, .chart-cycle-btn:hover {
    background-color: var(--hover-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-actions button:active, .share-btn:active { transform: scale(0.92); }

main {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero { margin-bottom: 3rem; text-align: left; }
.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 0.5rem; letter-spacing: -1.2px; line-height: 1.1; }
.hero p { font-size: 1.15rem; color: var(--secondary-text); font-weight: 500; }

.landing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.landing-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.landing-card:hover {
    transform: translateY(-4px);
    background-color: var(--hover-bg);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.card-icon {
    background: var(--accent-color);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(25, 113, 255, 0.15);
}

.landing-card h3 { margin: 0 0 0.5rem 0; font-size: 1.5rem; font-weight: 800; letter-spacing: -0.5px; }
.landing-card p { color: var(--secondary-text); margin: 0; font-weight: 500; }

.section-header { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 2.5rem; }

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: none;
    color: var(--text-color);
    font-weight: 800;
    cursor: pointer;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: fit-content;
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}
.back-btn:hover {
    background-color: var(--hover-bg);
    transform: translateX(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}
.back-btn:active { transform: scale(0.95); }

.section-header h2 { font-size: 2.2rem; font-weight: 800; margin: 0; letter-spacing: -1px; }

.title-with-share { display: flex; justify-content: space-between; align-items: center; }

.search-container { position: relative; width: 100%; }

input#athlete-search {
    width: 100%;
    padding: 1.25rem 1.6rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

input#athlete-search:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(25, 113, 255, 0.15);
}

#search-results {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-top: 0.8rem;
    max-height: 350px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow-lg);
    display: none;
    padding: 8px;
}

.search-item {
    padding: 1.1rem 1.4rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    font-weight: 600;
}
.search-item:hover { background: var(--accent-bg); color: var(--accent-color); }

.info-card {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    position: relative;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}
.info-main h3 { font-size: 2.4rem; font-weight: 800; margin: 0 0 0.2rem 0; letter-spacing: -1.2px; }
.info-main p { font-size: 1.25rem; color: var(--accent-color); font-weight: 700; margin: 0 0 1.8rem 0; }

.stats-mini { display: flex; gap: 2.5rem; }
.stat-item { display: flex; flex-direction: column; }
.stat-label { font-size: 0.85rem; color: var(--secondary-text); font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 4px; }
.stat-value { font-size: 1.6rem; font-weight: 800; }

.info-card .share-btn { position: absolute; top: 2.5rem; right: 2.5rem; }

.chart-section, .chart-card {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--radius-md);
    margin-bottom: 2.2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}
.chart-header, .chart-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.chart-card h3 { margin: 0; font-size: 1.3rem; font-weight: 800; letter-spacing: -0.5px; }

.chart-actions, .header-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    max-width: 100%;
}

.chart-wrapper, .chart-container { height: 420px; position: relative; margin-bottom: 1.8rem; }

.checkbox-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 1.2rem; }
.checkbox-item input { display: none; }
.checkbox-item label {
    padding: 8px 18px; background: var(--bg-color); border-radius: var(--radius-md);
    font-size: 0.9rem; font-weight: 700; cursor: pointer; border: 1px solid var(--border-color);
    transition: all 0.2s;
}
.checkbox-item label:hover { background-color: var(--hover-bg); border-color: var(--accent-color); }
.checkbox-item input:checked + label { background: var(--accent-color); color: white; border-color: var(--accent-color); box-shadow: 0 4px 12px rgba(25, 113, 255, 0.15); }

.filter-group, .filter-row-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
    width: 100%;
}

select {
    padding: 0.9rem 1.4rem;
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238e8e93' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.2rem center;
    padding-right: 3rem;
    box-shadow: var(--shadow-sm);
    max-width: 100%;
    min-width: 0;
}

select:hover {
    border-color: var(--accent-color);
    background-color: var(--hover-bg);
    transform: translateY(-1px);
}

.table-wrapper, .table-mini-wrapper {
    background: var(--bg-color);
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; white-space: nowrap; }
th {
    text-align: left;
    padding: 1.2rem 1.4rem;
    background: var(--card-bg);
    color: var(--secondary-text);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    position: sticky;
    top: 0;
    z-index: 10;
}
td { padding: 1.3rem 1.4rem; border-bottom: 1px solid var(--border-color); font-weight: 500; }
tr:nth-child(even) { background-color: rgba(0, 0, 0, 0.015); }
.dark-mode tr:nth-child(even), body.dark-mode tr:nth-child(even) { background-color: rgba(255, 255, 255, 0.015); }
tr:last-child td { border-bottom: none; }
tr:hover td { background-color: var(--accent-bg) !important; }

.clickable { cursor: pointer; color: var(--accent-color); font-weight: 700; }
.clickable:hover { text-decoration: underline; }

.pagination-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2.5rem 0;
    gap: 1.8rem;
}

.pagination-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 800px;
    gap: 1.5rem;
}

.pag-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex-grow: 1;
}

.pag-page {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.3px;
}

.pag-count {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--secondary-text);
    margin-top: 3px;
}

.pag-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg);
    border: none;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 800;
    color: var(--text-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 140px;
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.pag-btn:not(:disabled):hover {
    background-color: var(--hover-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.pag-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pag-btn:not(:disabled):active {
    transform: scale(0.94);
}

.filters-card, .results-card {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

footer { margin-top: 5rem; padding: 2rem 1.5rem; border-top: 1px solid var(--border-color); text-align: center; }
.footer-content p { font-size: 0.8rem; color: var(--secondary-text); font-weight: 400; }
.footer-content a { color: var(--accent-color); text-decoration: none; font-weight: 500; }
.footer-content a:hover { text-decoration: underline; }

.hidden { display: none !important; }

.chart-wrapper.expanded, .chart-container.expanded {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 2000; background: var(--bg-color); padding: 7rem 2rem 2rem 2rem;
    border-radius: 0; border: none;
}

.chart-section:has(.expanded) .chart-header,
.chart-card:has(.expanded) .chart-card-header {
    position: fixed; top: 2rem; right: 2rem; left: 2rem;
    z-index: 2001; display: flex; justify-content: flex-end; pointer-events: none;
}

.chart-section:has(.expanded) .chart-actions,
.chart-card:has(.expanded) .header-controls {
    pointer-events: auto; background: var(--card-bg); padding: 8px;
    border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
    z-index: 2002; position: relative; border: 1px solid var(--border-color);
}

.chart-card:has(.expanded) h3 { display: none; }

.expand-toggle-btn.expanded .expand-icon { display: none; }
.expand-toggle-btn.expanded .shrink-icon { display: block !important; }

@media (max-width: 768px) {
    main { padding: 1.5rem 1rem; }
    .chart-section, .chart-card, .filters-card, .results-card { padding: 1.5rem; }
    .hero h1 { font-size: 2.2rem; }
    .info-main h3 { font-size: 2rem; }
    .chart-header, .chart-card-header { flex-direction: column; align-items: stretch; gap: 1.2rem; }
    .pagination-nav { flex-direction: column-reverse; gap: 1.5rem; }
    .pag-btn { width: 100%; }
}

@media (max-width: 480px) {
    .chart-section, .chart-card, .filters-card, .results-card { padding: 1.2rem; }
    .chart-wrapper, .chart-container { height: 320px; }
    .info-card { padding: 1.5rem; }
    .info-main h3 { font-size: 1.8rem; }
    .stats-mini { gap: 1.5rem; }
}

.view-section:not(.hidden) { animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1); }
.info-card, .chart-section, .chart-card, .filters-card, .results-card { animation: slideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1); }
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }