:root {
    --background: #f3f5f8;
    --surface: #ffffff;
    --border: #dfe4ea;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2457d6;
    --primary-dark: #1d46ad;
    --sidebar: #162033;
    --sidebar-hover: #22304a;
    --danger: #c53030;
    --success: #16803a;
    --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family:
        "Pretendard",
        "Noto Sans KR",
        Arial,
        sans-serif;
    color: var(--text);
    background: var(--background);
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

.hidden {
    display: none !important;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        linear-gradient(
            135deg,
            #eef3ff 0%,
            #f7f9fc 52%,
            #e9efff 100%
        );
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 38px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 30px;
}

.brand h1 {
    margin: 0;
    font-size: 27px;
}

.brand p {
    margin: 5px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.brand-mark {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    color: #ffffff;
    background: var(--primary);
    font-size: 28px;
    font-weight: 800;
}

.brand-mark.small {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    font-size: 20px;
}

form {
    display: grid;
    gap: 10px;
}

label {
    margin-top: 8px;
    font-size: 14px;
    font-weight: 700;
}

input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
    background: #ffffff;
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(36, 87, 214, 0.12);
}

form button {
    height: 48px;
    margin-top: 16px;
    border: 0;
    border-radius: 9px;
    color: #ffffff;
    background: var(--primary);
    font-weight: 700;
}

form button:hover {
    background: var(--primary-dark);
}

.message {
    min-height: 22px;
    margin-top: 8px;
    color: var(--danger);
    font-size: 14px;
    white-space: pre-wrap;
}

.message.success {
    color: var(--success);
}

.app-page {
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 245px;
    flex-shrink: 0;
    min-height: 100vh;
    padding: 20px 14px;
    color: #ffffff;
    background: var(--sidebar);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 8px 22px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand strong,
.sidebar-brand span {
    display: block;
}

.sidebar-brand span {
    margin-top: 4px;
    color: #aab6cb;
    font-size: 12px;
}

.menu {
    margin-top: 18px;
}

.menu-title {
    padding: 18px 12px 8px;
    color: #8492aa;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.menu-item {
    width: 100%;
    padding: 12px 14px;
    border: 0;
    border-radius: 8px;
    color: #d8deea;
    background: transparent;
    text-align: left;
}

.menu-item:hover,
.menu-item.active {
    color: #ffffff;
    background: var(--sidebar-hover);
}

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

.topbar {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 26px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.topbar h2 {
    margin: 0;
    font-size: 22px;
}

.topbar p {
    margin: 5px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.user-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-summary {
    margin-right: 8px;
    text-align: right;
}

.user-summary strong,
.user-summary span {
    display: block;
}

.user-summary span {
    margin-top: 3px;
    color: var(--muted);
    font-size: 12px;
}

.secondary-button,
.danger-button {
    height: 38px;
    padding: 0 14px;
    border-radius: 8px;
    font-weight: 700;
}

.secondary-button {
    color: var(--text);
    background: #ffffff;
    border: 1px solid var(--border);
}

.danger-button {
    color: #ffffff;
    background: var(--danger);
    border: 1px solid var(--danger);
}

.content-page {
    padding: 26px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.status-card,
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.status-card {
    padding: 20px;
}

.status-card span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.status-card strong {
    display: block;
    margin-top: 12px;
    font-size: 22px;
}

.panel {
    margin-top: 18px;
    padding: 22px;
}

.panel-header h3 {
    margin: 0;
}

.panel-header p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.info-grid > div {
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: #fafbfc;
}

.info-grid span,
.info-grid strong {
    display: block;
}

.info-grid span {
    color: var(--muted);
    font-size: 12px;
}

.info-grid strong {
    margin-top: 8px;
}

.permission-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.permission-badge {
    padding: 7px 10px;
    border-radius: 999px;
    color: #28427a;
    background: #edf3ff;
    font-size: 12px;
    font-weight: 700;
}

.empty-panel {
    min-height: 300px;
    display: grid;
    place-content: center;
    text-align: center;
}

.empty-panel h3 {
    margin-bottom: 6px;
}

.empty-panel p {
    color: var(--muted);
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.58);
}

.modal-card {
    width: 100%;
    max-width: 440px;
    padding: 28px;
    border-radius: 15px;
    background: #ffffff;
    box-shadow: var(--shadow);
}

.modal-card h3 {
    margin: 0;
}

.modal-card > p {
    color: var(--muted);
    font-size: 14px;
}

@media (max-width: 1050px) {
    .cards,
    .info-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .sidebar {
        width: 205px;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .user-area {
        width: 100%;
        flex-wrap: wrap;
    }

    .user-summary {
        margin-right: auto;
        text-align: left;
    }

    .cards,
    .info-grid {
        grid-template-columns: 1fr;
    }
}