/* ================================
   K1 SPORTS - Design System
   ================================ */
:root {
    --k1-black: #111111;
    --k1-dark: #1A1A1A;
    --k1-gray-900: #212121;
    --k1-gray-800: #2D2D2D;
    --k1-gray-700: #3D3D3D;
    --k1-gray-600: #555555;
    --k1-gray-500: #777777;
    --k1-gray-400: #999999;
    --k1-gray-300: #BBBBBB;
    --k1-gray-200: #E0E0E0;
    --k1-gray-100: #F0F0F0;
    --k1-white: #FFFFFF;

    --k1-accent: #1E56A0;
    --k1-accent-light: #3A7BD5;
    --k1-accent-dark: #163D72;
    --k1-blue: #3B82F6;
    --k1-purple: #8B5CF6;
    --k1-orange: #F59E0B;
    --k1-red: #EF4444;
    --k1-pink: #EC4899;
    --k1-cyan: #06B6D4;
    --k1-green: #10B981;
    --k1-teal: #14B8A6;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.25);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 20px rgba(30,86,160,0.25);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--k1-black);
    color: var(--k1-white);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ================================
   Login Page
   ================================ */
.login-page {
    background: var(--k1-black);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 80vw;
    height: 80vw;
    background: radial-gradient(circle, rgba(30,86,160,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.login-page::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -20%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(59,130,246,0.04) 0%, transparent 70%);
    pointer-events: none;
}

.login-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

.login-card {
    background: var(--k1-dark);
    border: 1px solid var(--k1-gray-800);
    border-radius: var(--radius-xl);
    padding: 44px 36px;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.login-logo {
    width: 80px;
    height: auto;
    margin-bottom: 16px;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(30,86,160,0.3);
}

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--k1-white);
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.login-header p {
    color: var(--k1-gray-500);
    font-size: 13px;
}

/* Tab Selector */
.tab-selector {
    display: flex;
    background: var(--k1-gray-900);
    border-radius: var(--radius-sm);
    padding: 3px;
    margin-bottom: 28px;
    border: 1px solid var(--k1-gray-800);
}

.tab-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    color: var(--k1-gray-500);
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: var(--k1-gray-800);
    color: var(--k1-accent);
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.tab-btn i { margin-right: 6px; }

/* Forms */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--k1-gray-400);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group label i {
    margin-right: 5px;
    color: var(--k1-accent);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 13px 16px;
    background: var(--k1-gray-900);
    border: 1px solid var(--k1-gray-700);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    color: var(--k1-white);
    transition: border-color 0.3s, box-shadow 0.3s;
    outline: none;
}

.form-group input::placeholder {
    color: var(--k1-gray-600);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--k1-accent);
    box-shadow: 0 0 0 3px rgba(30,86,160,0.2);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--k1-accent);
    color: var(--k1-white);
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
    letter-spacing: 0.3px;
}

.btn-primary:hover {
    background: var(--k1-accent-light);
    box-shadow: 0 4px 20px rgba(30,86,160,0.35);
    transform: translateY(-1px);
}

.btn-admin {
    background: var(--k1-white);
    color: var(--k1-black);
}

.btn-admin:hover {
    background: var(--k1-gray-200);
    box-shadow: 0 4px 20px rgba(255,255,255,0.15);
}

.error-message {
    background: rgba(239,68,68,0.1);
    color: var(--k1-red);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 12px;
    border: 1px solid rgba(239,68,68,0.2);
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.login-footer p {
    color: var(--k1-gray-600);
    font-size: 12px;
}

.login-footer .social-link {
    color: var(--k1-gray-500);
    text-decoration: none;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s;
}

.login-footer .social-link:hover {
    color: var(--k1-accent);
}

/* ================================
   Privacy Policy Modal
   ================================ */
.privacy-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}
.privacy-modal-overlay.hidden {
    display: none !important;
}
.privacy-modal {
    background: var(--k1-dark);
    border: 1px solid var(--k1-gray-700);
    border-radius: 16px;
    width: 640px;
    max-width: 95vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}
.privacy-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--k1-gray-700);
    flex-shrink: 0;
}
.privacy-modal-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--k1-white);
    display: flex;
    align-items: center;
    gap: 10px;
}
.privacy-modal-header h2 i {
    color: var(--k1-accent-light);
}
.privacy-modal-close {
    background: none;
    border: none;
    color: var(--k1-gray-400);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.2s;
}
.privacy-modal-close:hover {
    background: var(--k1-gray-800);
    color: var(--k1-white);
}
.privacy-modal-body {
    padding: 24px;
    overflow-y: auto;
    color: var(--k1-gray-300);
    font-size: 13px;
    line-height: 1.8;
}
.privacy-modal-body h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--k1-white);
    margin-bottom: 12px;
}
.privacy-modal-body h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--k1-accent-light);
    margin: 24px 0 10px;
    padding-left: 10px;
    border-left: 3px solid var(--k1-accent);
}
.privacy-modal-body p {
    margin-bottom: 10px;
}
.privacy-modal-body ul {
    margin: 8px 0 12px 20px;
    padding: 0;
}
.privacy-modal-body ul li {
    margin-bottom: 6px;
    position: relative;
}
.privacy-modal-body ul li::marker {
    color: var(--k1-accent-light);
}
.privacy-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0 16px;
    font-size: 12.5px;
}
.privacy-table th,
.privacy-table td {
    padding: 10px 14px;
    border: 1px solid var(--k1-gray-700);
    text-align: left;
}
.privacy-table th {
    background: var(--k1-gray-900);
    color: var(--k1-gray-200);
    font-weight: 600;
    font-size: 12px;
}
.privacy-table td {
    color: var(--k1-gray-300);
}
.privacy-link {
    color: var(--k1-gray-500);
    font-size: 12px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 8px;
    transition: color 0.2s;
}
.privacy-link:hover {
    color: var(--k1-accent-light);
}

/* ================================
   Dashboard Layout
   ================================ */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--k1-dark);
    border-right: 1px solid var(--k1-gray-800);
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--k1-gray-800);
    margin-bottom: 12px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.sidebar-logo img {
    width: 44px;
    height: auto;
    border-radius: 50%;
}

.sidebar-logo span {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 1px;
}

.sidebar-header .user-info {
    padding: 12px 14px;
    background: var(--k1-gray-900);
    border-radius: var(--radius-sm);
    border: 1px solid var(--k1-gray-800);
}

.sidebar-header .user-info .name {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 4px;
}

.sidebar-header .user-info .badge {
    display: inline-block;
    padding: 2px 10px;
    background: var(--k1-accent);
    color: var(--k1-white);
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
}

.sidebar-header .user-info .badge-admin {
    background: var(--k1-accent);
}

.sidebar-nav {
    padding: 4px 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 20px;
    color: var(--k1-gray-500);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--k1-white);
    background: rgba(255,255,255,0.04);
    border-left-color: var(--k1-accent);
}

.sidebar-nav a i {
    width: 20px;
    text-align: center;
    font-size: 14px;
}

.sidebar-nav a.active i {
    color: var(--k1-accent);
}

.sidebar-bottom {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--k1-gray-800);
}

.sidebar-bottom a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--k1-gray-500);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s;
}

.sidebar-bottom a:hover { color: var(--k1-accent); }

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 28px 32px;
    min-height: 100vh;
    background: var(--k1-black);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.page-header h1 i {
    color: var(--k1-accent);
    margin-right: 10px;
}

/* Student Profile in Header */
.student-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--k1-gray-900);
    border: 1px solid var(--k1-gray-800);
    border-radius: 20px;
}

.student-profile-name {
    font-size: 14px;
    font-weight: 800;
    color: var(--k1-white);
}

.student-profile-branch {
    font-size: 12px;
    color: var(--k1-gray-400);
    font-weight: 600;
}

/* Cards */
.card {
    background: var(--k1-dark);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--k1-gray-800);
    overflow: hidden;
    max-width: 100%;
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--k1-white);
}

.card-title i {
    color: var(--k1-accent);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--k1-dark);
    border-radius: var(--radius-md);
    padding: 18px;
    text-align: center;
    border: 1px solid var(--k1-gray-800);
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s, transform 0.2s;
}

.stat-card:hover {
    border-color: var(--k1-gray-700);
    transform: translateY(-2px);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}

.stat-card.purple::before { background: linear-gradient(90deg, #8B5CF6, #A78BFA); }
.stat-card.blue::before { background: linear-gradient(90deg, #3B82F6, #60A5FA); }
.stat-card.green::before { background: linear-gradient(90deg, #10B981, #34D399); }
.stat-card.orange::before { background: linear-gradient(90deg, #F59E0B, #FBBF24); }
.stat-card.pink::before { background: linear-gradient(90deg, #EC4899, #F472B6); }
.stat-card.cyan::before { background: linear-gradient(90deg, #06B6D4, #22D3EE); }
.stat-card.red::before { background: linear-gradient(90deg, #EF4444, #F87171); }
.stat-card.teal::before { background: linear-gradient(90deg, #14B8A6, #2DD4BF); }

.stat-card .stat-icon { font-size: 22px; margin-bottom: 6px; }
.stat-card .stat-label {
    font-size: 11px;
    color: var(--k1-gray-500);
    margin-bottom: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.stat-card .stat-value {
    font-size: 20px;
    font-weight: 800;
    color: var(--k1-white);
}
.stat-card .stat-score {
    font-size: 12px;
    font-weight: 700;
    margin-top: 6px;
    padding: 3px 10px;
    border-radius: 12px;
    display: inline-block;
}

.stat-score.excellent { background: rgba(16,185,129,0.15); color: #34D399; }
.stat-score.good { background: rgba(59,130,246,0.15); color: #60A5FA; }
.stat-score.average { background: rgba(245,158,11,0.15); color: #FBBF24; }
.stat-score.poor { background: rgba(239,68,68,0.15); color: #F87171; }

/* Chart Container */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

/* Percentile */
.percentile-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.percentile-item {
    display: flex;
    align-items: center;
    gap: 14px;
}

.percentile-label {
    width: 95px;
    font-size: 12px;
    font-weight: 700;
    color: var(--k1-gray-400);
    flex-shrink: 0;
}

.percentile-bar-wrap { flex: 1; min-width: 0; }

.percentile-bar-bg {
    height: 26px;
    background: var(--k1-gray-900);
    border-radius: 13px;
    overflow: hidden;
    border: 1px solid var(--k1-gray-800);
}

.percentile-bar-fill {
    height: 100%;
    border-radius: 13px;
    transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    min-width: 60px;
    position: relative;
}

.percentile-bar-fill span {
    font-size: 11px;
    font-weight: 800;
    color: var(--k1-white);
    white-space: nowrap;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.percentile-badge {
    width: 58px;
    text-align: center;
    font-size: 13px;
    font-weight: 800;
    flex-shrink: 0;
    color: var(--k1-white);
}

/* ================================
   Admin Styles
   ================================ */
.upload-zone {
    border: 2px dashed var(--k1-gray-700);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--k1-gray-900);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--k1-accent);
    background: rgba(30,86,160,0.06);
}

.upload-zone i {
    font-size: 44px;
    color: var(--k1-accent);
    margin-bottom: 14px;
}

.upload-zone h3 {
    font-size: 16px;
    margin-bottom: 6px;
    color: var(--k1-white);
}

.upload-zone p {
    color: var(--k1-gray-500);
    font-size: 13px;
}

/* Table */
.data-table-wrap { overflow-x: auto; margin-top: 16px; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table thead {
    background: var(--k1-gray-900);
}

.data-table th {
    padding: 11px 14px;
    text-align: left;
    font-weight: 700;
    color: var(--k1-gray-400);
    border-bottom: 1px solid var(--k1-gray-800);
    white-space: nowrap;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--k1-gray-900);
    white-space: nowrap;
    color: var(--k1-gray-300);
}

.data-table tbody tr {
    transition: background 0.15s;
}

.data-table tbody tr:hover {
    background: rgba(255,255,255,0.02);
}

.data-table .rank-1 { color: #FBBF24; font-weight: 800; }
.data-table .rank-2 { color: #94A3B8; font-weight: 700; }
.data-table .rank-3 { color: #CD7F32; font-weight: 700; }

/* Buttons */
.btn {
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: all 0.2s;
}

.btn-indigo { background: var(--k1-accent); color: var(--k1-white); }
.btn-indigo:hover { background: var(--k1-accent-light); box-shadow: var(--shadow-glow); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--k1-gray-700);
    color: var(--k1-gray-400);
}
.btn-outline:hover {
    border-color: var(--k1-accent);
    color: var(--k1-accent);
}

.btn-danger { background: rgba(239,68,68,0.15); color: #F87171; border: 1px solid rgba(239,68,68,0.2); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }

.btn-success { background: var(--k1-green); color: var(--k1-black); }
.btn-sm { padding: 6px 12px; font-size: 11px; }

/* Selects */
.select-wrap {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.select-wrap select,
.select-wrap input[type="text"],
.select-wrap input[type="month"] {
    padding: 10px 14px;
    background: var(--k1-gray-900);
    border: 1px solid var(--k1-gray-700);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13px;
    color: var(--k1-white);
    outline: none;
}

.select-wrap select:focus,
.select-wrap input:focus {
    border-color: var(--k1-accent);
}

/* Grid */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
}

.badge-male { background: rgba(59,130,246,0.15); color: #60A5FA; }
.badge-female { background: rgba(236,72,153,0.15); color: #F472B6; }

/* Month Tag */
.month-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(0,201,167,0.1);
    color: var(--k1-accent);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

/* Alert */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(16,185,129,0.1);
    color: #34D399;
    border: 1px solid rgba(16,185,129,0.2);
}

.alert-error {
    background: rgba(239,68,68,0.1);
    color: #F87171;
    border: 1px solid rgba(239,68,68,0.2);
}

.alert-info {
    background: rgba(59,130,246,0.1);
    color: #60A5FA;
    border: 1px solid rgba(59,130,246,0.2);
}

/* Loading */
.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--k1-gray-800);
    border-top-color: var(--k1-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Mobile Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 200;
    width: 42px;
    height: 42px;
    background: var(--k1-dark);
    border: 1px solid var(--k1-gray-800);
    color: var(--k1-white);
    border-radius: var(--radius-sm);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* ================================
   Trend Charts
   ================================ */
.trend-chart-item {
    background: var(--k1-gray-900);
    border: 1px solid var(--k1-gray-800);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 14px;
    overflow: hidden;
    max-width: 100%;
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-xl); }

    .grid-2 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .page-header h1 { font-size: 18px; }
    .student-profile { padding: 4px 10px; gap: 6px; }
    .student-profile-name { font-size: 13px; }
    .student-profile-branch { font-size: 11px; }
    .student-profile .badge { font-size: 10px; padding: 2px 7px; }
    .login-card { padding: 32px 24px; }
    .percentile-item { flex-direction: row; align-items: center; gap: 10px; }
    .percentile-label { width: 70px; font-size: 11px; }
    .percentile-badge { width: 52px; font-size: 12px; }
    .percentile-bar-bg { height: 24px; }
    .percentile-bar-fill { min-width: 55px; padding-right: 6px; }
    .percentile-bar-fill span { font-size: 10px; }
    .card { padding: 12px; overflow: hidden; max-width: 100%; }
    .main-content { margin-left: 0; padding: 60px 8px 20px; }
    .data-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .trend-chart-item { padding: 10px; }
    #trendChartsArea { max-width: 100%; overflow: hidden; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .stat-card { padding: 14px 10px; }
    .stat-card .stat-value { font-size: 17px; }
    .stat-card .stat-label { font-size: 10px; }
}