:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --background-bg: #f8fafc;
    --surface-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius-lg: 1rem;
    --radius-md: 0.5rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-bg);
    color: var(--text-primary);
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: var(--surface-bg);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.header-content h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.admin-entry-link,
.admin-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.admin-entry-link:hover,
.admin-link:hover {
    color: var(--primary-color);
}

.period-select {
    padding: 0.625rem 2rem 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-primary);
    background-color: var(--surface-bg);
    cursor: pointer;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.period-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s;
    font-family: inherit;
}

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

.full-width {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
}

.dashboard {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.panel {
    background-color: var(--surface-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.average-badge {
    background-color: #eff6ff;
    color: var(--primary-color);
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.average-badge strong {
    font-weight: 700;
}

.table-container {
    flex: 1;
    overflow-y: auto;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.5rem;
}

th {
    text-align: left;
    padding: 1rem 0;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--surface-bg);
}

td {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

tr:last-child td {
    border-bottom: none;
}

.chart-container {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--surface-bg);
    padding: 2rem;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    position: relative;
    box-shadow: 20px 20px 60px rgba(0, 0, 0, 0.1);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

@media (max-width: 768px) {
    header {
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .header-controls {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .period-select,
    .btn-primary,
    .admin-entry-link {
        width: 100%;
    }

    .admin-entry-link {
        display: block;
    }

    .dashboard {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    .header-content h1 {
        font-size: 1.25rem;
    }

    .btn-primary span {
        display: none;
    }
}

.hidden {
    display: none !important;
}

.full-width-panel {
    grid-column: 1 / -1;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background-color 0.2s;
}

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

.admin-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 260px 1fr;
}

.admin-sidebar {
    background: var(--surface-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.25rem;
}

.admin-brand {
    display: inline-block;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.admin-nav-link {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.75rem 0.9rem;
    border-radius: var(--radius-md);
}

.admin-nav-link:hover {
    background: var(--background-bg);
    color: var(--primary-color);
}

.admin-main {
    padding: 2rem;
}

.admin-page {
    max-width: 1100px;
}

.admin-page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.admin-page-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.admin-page-header p {
    color: var(--text-secondary);
}

.admin-alert {
    padding: 0.9rem 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.admin-alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.admin-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.65rem;
    border-radius: 9999px;
    background: #f1f5f9;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
}

.admin-badge-success {
    background: #ecfdf5;
    color: #047857;
}

.admin-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.admin-actions form {
    margin: 0;
}

.admin-link-danger {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: #b91c1c;
    font: inherit;
}

.admin-empty {
    text-align: center;
    color: var(--text-secondary);
}

.admin-form-panel {
    max-width: 720px;
}

.admin-form {
    padding: 1.5rem;
}

.admin-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.admin-form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 480px;
}

.login-content {
    padding: 1.5rem;
}

.login-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.login-button {
    width: 100%;
    justify-content: center;
}

@media (max-width: 768px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .admin-main {
        padding: 1rem;
    }

    .admin-page-header {
        flex-direction: column;
    }

    .admin-form-grid {
        grid-template-columns: 1fr;
    }
}