:root {
    font-family: 'Noto Sans KR', sans-serif;
    color: #222;
    background-color: #f5f6fa;
}

body {
    margin: 0;
    padding: 0;
    font-size: 18px;
    line-height: 1.6;
}

.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 480px;
    background: #fff;
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #2c3e50;
    font-size: 2rem;
}

.login-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.login-form input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 1px solid #dcdfe6;
    border-radius: 10px;
    font-size: 1.1rem;
    margin-bottom: 1.75rem;
    transition: border-color 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.login-form button {
    width: 100%;
    padding: 1.1rem 1rem;
    font-size: 1.25rem;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s ease-in-out, box-shadow 0.2s;
}

.login-form button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(41, 128, 185, 0.35);
}

.error-message {
    background: #fdecea;
    color: #c0392b;
    border: 1px solid #f5c6cb;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.login-tip {
    text-align: center;
    margin-top: 1.5rem;
    color: #7f8c8d;
}

/* Main layout */
.main-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-header {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    padding: 2rem 2.5rem;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-header h1 {
    margin: 0;
    font-size: 2.25rem;
}

.user-info {
    font-weight: 600;
    font-size: 1.1rem;
}

.main-content {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 2.5rem;
    padding: 2.5rem;
}

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

.card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    padding: 2rem;
}

.card h2 {
    margin-top: 0;
    color: #34495e;
    font-size: 1.75rem;
}

.card h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: #2c3e50;
}

.field-group {
    display: flex;
    gap: 1.25rem;
    align-items: flex-end;
    margin-bottom: 1.75rem;
}

.field-group input[type="text"] {
    flex: 1;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.button-group .primary-button,
.button-group .secondary-button {
    flex: 1;
}

.primary-button,
.secondary-button {
    padding: 1rem 1.75rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.05rem;
}

.primary-button {
    background: #3498db;
    color: #fff;
}

.secondary-button {
    background: #ecf0f1;
    color: #34495e;
}

.table {
    width: 100%;
    min-width: 420px;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 1rem 0.75rem;
    border-bottom: 1px solid #ecf0f1;
    text-align: left;
    font-size: 1.05rem;
}

.table tbody tr:hover {
    background-color: #f4f6f9;
    cursor: pointer;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 700;
}

.status-warning {
    background: rgba(241, 196, 15, 0.15);
    color: #f39c12;
}

.status-penalty {
    background: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
}

.radio-group {
    display: flex;
    gap: 2.5rem;
    margin: 1.5rem 0;
    font-size: 1.1rem;
}

.radio-group input {
    width: 1.2rem;
    height: 1.2rem;
    margin-right: 0.5rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.infraction-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.infraction-form input[type="text"],
.infraction-form input[type="file"] {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 1px solid #dcdfe6;
    border-radius: 12px;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.infraction-form input[type="file"] {
    padding: 0.85rem 1.25rem;
}

.infraction-form {
    border-top: 1px solid #ecf0f1;
    margin-top: 2rem;
    padding-top: 1.75rem;
}

.detail-view {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.detail-view img {
    width: 100%;
    border-radius: 12px;
    object-fit: contain;
    max-height: 420px;
}

.detail-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
    font-size: 1.05rem;
}

.logout-link {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0.75rem 1.75rem;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.18);
    transition: background-color 0.2s ease, transform 0.1s ease-in-out;
}

.logout-link:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.admin-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.admin-content {
    flex: 1;
    padding: 2rem;
}

.user-table input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #dcdfe6;
    border-radius: 10px;
    font-size: 1.05rem;
}

.add-user-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-top: 2rem;
}

@media (max-width: 960px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .main-content {
        padding: 1.75rem;
    }

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

    .field-group button,
    .field-group .primary-button,
    .field-group .secondary-button {
        width: 100%;
    }

    .radio-group {
        flex-wrap: wrap;
        row-gap: 0.75rem;
    }

    .button-group {
        flex-direction: column;
    }

    .button-group .primary-button,
    .button-group .secondary-button {
        width: 100%;
    }

    .admin-content {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 1.75rem 1.5rem;
        margin: 1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
        font-size: 1rem;
    }

    .main-header h1 {
        font-size: 1.75rem;
    }
}