:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #cbd5e1;
    --accent-success: #10b981;
    --accent-danger: #ef4444;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.5;
    padding: 24px 0;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Фильтры */
.filter-card {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    padding: 24px;
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.lg-span {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-group select,
.form-group input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: #fff;
    color: var(--text-main);
    font-family: var(--font-family);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group select:focus,
.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* Контейнер поиска и выбора школы */
.school-selector-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#schoolSearch {
    background-color: #f8fafc;
    border-style: dashed;
}

#schoolSearch:focus {
    background-color: #fff;
    border-style: solid;
}

/* Чекбокс */
.checkbox-container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 26px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    user-select: none;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 18px;
    width: 18px;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.15s;
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--primary-color);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

/* Нижняя часть формы */
.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.btn {
    padding: 10px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* Таблица результатов */
.results-card {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    margin-top: 10px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
    flex-wrap: wrap;
}

.results-title-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.results-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Поле быстрого поиска учеников в таблице */
#tableSearch {
    max-width: 360px;
    width: 100%;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

#tableSearch:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.badge {
    background-color: #eff6ff;
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.table-container {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.88rem;
}

th, td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

th {
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

tr:hover td {
    background-color: #f8fafc;
}

.w-num { width: 50px; text-align: center; }
.w-score { width: 90px; text-align: center; }
.w-mark { width: 80px; text-align: center; }
.w-date { width: 100px; white-space: nowrap; }

td.w-num, td.w-score, td.w-mark {
    text-align: center;
}

.score-badge {
    font-weight: 600;
}

.mark-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.8rem;
}

.mark-5 { background-color: #d1fae5; color: #065f46; }
.mark-4 { background-color: #e0f2fe; color: #075985; }
.mark-3 { background-color: #fef3c7; color: #92400e; }
.mark-2 { background-color: #fee2e2; color: #991b1b; }
.mark-neutral { background-color: #f1f5f9; color: #475569; }

/* Анимация и лоадер */
.hidden {
    display: none !important;
}

.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    gap: 12px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px dashed var(--primary-color);
    border-radius: 50%;
    animation: spin 1.2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-container p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Сообщения */
.info-message {
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    background-color: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 500;
}

.info-message.error {
    background-color: #fee2e2;
    border-color: #fca5a5;
    color: var(--accent-danger);
}

@media (max-width: 768px) {
    .form-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .results-header {
        flex-direction: column;
        align-items: stretch;
    }

    #tableSearch {
        max-width: 100%;
    }
}