:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;

    --bg-color: #f3f4f6;
    --card-bg: #ffffff;

    --text-main: #1f2937;
    --text-muted: #6b7280;

    --border-color: #e5e7eb;
    --border-strong: #d1d5db;

    --status-normal-bg: #d1fae5;
    --status-normal-text: #065f46;

    --status-notice-bg: #fef08a;
    --status-notice-text: #854d0e;

    --status-warning-bg: #fed7aa;
    --status-warning-text: #9a3412;

    --status-expired-bg: #fecaca;
    --status-expired-text: #991b1b;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 24px rgba(15, 23, 42, 0.08);
    --radius-md: 10px;
    --radius-sm: 6px;
}

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

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

.header {
    background-color: var(--card-bg);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem 1rem;
    max-width: 1240px;
    margin: 0 auto;
}

@media (min-width: 900px) {
    .container {
        flex-direction: row;
        align-items: flex-start;
        padding: 2.5rem 1.5rem;
        gap: 1.75rem;
    }

    .sidebar {
        flex: 0 0 340px;
        position: sticky;
        top: 2rem;
    }

    .main-content {
        flex: 1;
        min-width: 0;
    }
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(229, 231, 235, 0.9);
}

.card h2 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 0.95rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.45rem;
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--text-main);
}

.required {
    color: #dc2626;
}

.form-group input,
.form-group select,
.form-group textarea,
.control-group select {
    width: 100%;
    font: inherit;
    color: var(--text-main);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.form-group input,
.form-group select,
.control-group select {
    min-height: 44px;
    padding: 0.72rem 0.85rem;
}

.form-group textarea {
    padding: 0.72rem 0.85rem;
    min-height: 96px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-full {
    width: 100%;
    min-height: 48px;
    margin-top: 0.35rem;
    font-size: 1rem;
}

.btn-auto {
    width: auto;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

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

.btn-secondary {
    background-color: #fff;
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #f8fafc;
}

.btn-update,
.btn-delete {
    min-height: 34px;
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
    border-radius: 6px;
    width: auto;
}

.btn-update {
    background-color: #fff;
    color: var(--primary-color);
    border-color: rgba(37, 99, 235, 0.45);
    margin-right: 0.35rem;
}

.btn-update:hover {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.btn-delete {
    background-color: #fff;
    color: var(--text-muted);
    border-color: var(--border-color);
}

.btn-delete:hover {
    background-color: #fff5f5;
    color: var(--status-expired-text);
    border-color: #fca5a5;
}

.error-message {
    display: none;
    margin-bottom: 1rem;
    padding: 0.75rem 0.9rem;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    background-color: #fef2f2;
    color: var(--status-expired-text);
    font-size: 0.9rem;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem 1.25rem;
    margin-bottom: 1.25rem;
    padding: 0.95rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: #f8fafc;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.92rem;
}

.control-group label {
    font-weight: 700;
    color: var(--text-main);
}

.control-group select {
    width: auto;
    min-width: 150px;
    padding-right: 2rem;
}

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
    white-space: nowrap;
    font-size: 0.93rem;
}

th,
td {
    padding: 0.95rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

th {
    background-color: #f8fafc;
    color: #475569;
    font-size: 0.9rem;
    font-weight: 700;
}

tbody tr {
    transition: background-color 0.2s ease;
}

tbody tr:hover {
    background-color: #f9fafb;
}

.days-cell {
    font-weight: 700;
}

.note-cell {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.badge {
    display: inline-block;
    min-width: 82px;
    padding: 0.38rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.83rem;
    font-weight: 700;
    text-align: center;
}

.row-normal .badge {
    background-color: var(--status-normal-bg);
    color: var(--status-normal-text);
}

.row-notice {
    background-color: rgba(254, 240, 138, 0.05);
}

.row-notice .badge {
    background-color: var(--status-notice-bg);
    color: var(--status-notice-text);
}

.row-warning {
    background-color: rgba(254, 215, 170, 0.07);
}

.row-warning .badge {
    background-color: var(--status-warning-bg);
    color: var(--status-warning-text);
}

.row-expired {
    background-color: rgba(254, 202, 202, 0.08);
}

.row-expired .badge {
    background-color: var(--status-expired-bg);
    color: var(--status-expired-text);
}

.empty-message {
    padding: 2.75rem 1rem;
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background-color: rgba(15, 23, 42, 0.45);
    z-index: 1000;
}

.modal {
    width: 100%;
    max-width: 420px;
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
    border: 1px solid rgba(229, 231, 235, 0.95);
}

.modal h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border-color);
}

.contract-name-box {
    margin-bottom: 0.35rem;
    padding: 0.7rem 0.85rem;
    border-radius: var(--radius-sm);
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
    font-weight: 700;
    color: var(--text-main);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

@media (max-width: 899px) {
    .header {
        padding: 0.9rem 1rem;
    }

    .header h1 {
        font-size: 1.4rem;
    }

    .card {
        padding: 1.2rem;
    }

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

    .control-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.35rem;
    }

    .control-group select {
        width: 100%;
        min-width: 0;
    }

    th,
    td {
        padding: 0.85rem 0.6rem;
    }

    .modal-actions {
        flex-direction: column-reverse;
    }

    .modal-actions .btn {
        width: 100%;
    }
}