* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: #0d1117;
    color: #e8ecf1;
    font-family: "Segoe UI", "Noto Sans KR", Arial, sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(180deg, #0b1118 0%, #151a22 100%);
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: #171b24;
    border: 1px solid #2a3242;
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.brand {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.subtitle {
    color: #9ba7b8;
    margin-bottom: 24px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    color: #b9c2d0;
}

.login-form input {
    width: 100%;
    padding: 14px 12px;
    border: 1px solid #344054;
    background: #0e131a;
    color: #eef2f7;
    outline: none;
    border-radius: 6px;
    margin-bottom: 16px;
}

.login-form button,
.btn {
    padding: 12px 18px;
    border: 1px solid #4a5568;
    background: #1f2937;
    color: #f9fafb;
    cursor: pointer;
    border-radius: 6px;
    transition: 0.15s ease;
}

.login-form button:hover,
.btn:hover {
    background: #253142;
}

.btn.primary {
    background: #dbe2ea;
    color: #111827;
    border-color: #dbe2ea;
}

.btn.primary:hover {
    background: #ffffff;
}

.btn.ghost {
    background: transparent;
    border-color: #5f6b7c;
}

.alert {
    padding: 12px 14px;
    margin-bottom: 16px;
    border: 1px solid #5d2c2c;
    background: #2b1515;
    color: #ffcccc;
}

.layout {
    padding: 24px;
    max-width: 1480px;
    margin: 0 auto;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid #2a3242;
    padding-bottom: 18px;
}

.top-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.topbar h1 {
    margin: 0 0 8px 0;
    font-size: 28px;
}

.meta-line {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    color: #95a1b2;
    font-size: 14px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.panel {
    background: #161b22;
    border: 1px solid #2a3242;
    border-radius: 8px;
    padding: 18px;
    min-width: 0;
}

.command-panel {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 18px;
    background:
        linear-gradient(135deg, rgba(28, 68, 105, 0.42), rgba(22, 27, 34, 0.98) 44%),
        #161b22;
}

.command-panel > div:first-child {
    flex: 1;
}

.command-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.command-grid > div,
.command-note {
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 14px;
    background: rgba(13, 17, 23, 0.72);
}

.command-grid .label,
.router-box > .label {
    display: block;
    color: #95a1b2;
    font-size: 12px;
    margin-bottom: 8px;
}

.command-grid strong {
    display: block;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    font-size: clamp(16px, 1.4vw, 22px);
    overflow-wrap: anywhere;
}

.command-note {
    width: min(280px, 100%);
    display: flex;
    align-items: center;
    color: #b8c4d4;
    line-height: 1.55;
}

.panel.wide {
    grid-column: span 2;
}

.panel-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #f1f5f9;
}

.control-group .row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
    align-items: center;
}

.range-wrap input[type="range"] {
    flex: 1;
    min-width: 240px;
}

.range-wrap input[type="number"] {
    width: 90px;
    padding: 10px;
    border: 1px solid #344054;
    background: #0e131a;
    color: #eef2f7;
    border-radius: 6px;
}

.state-box {
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 16px;
    background: #11161e;
    line-height: 1.9;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px 18px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
}

.service-list {
    display: grid;
    gap: 10px;
}

.service-row {
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 12px;
    background: #11161e;
}

.service-main {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: flex-start;
}

.service-main strong,
.wifi-list strong,
.lease-list strong {
    display: block;
    color: #eef2f7;
}

.service-main span,
.service-meta,
.wifi-list span,
.wifi-list small,
.lease-list span,
.lease-list small {
    display: block;
    color: #8b98aa;
    font-size: 12px;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

.service-state {
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 3px 8px;
    font-style: normal;
    font-size: 12px;
    font-weight: 700;
}

.service-state.up {
    background: #12301d;
    color: #a7f3b8;
}

.service-state.down {
    background: #301717;
    color: #ffb4b4;
}

.service-meta {
    margin-top: 8px;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
}

.service-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.btn.compact {
    padding: 7px 10px;
    font-size: 12px;
}

.btn.danger {
    border-color: #6b2c2c;
    background: #2b1515;
    color: #ffd7d7;
}

.router-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.router-box {
    min-width: 0;
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 14px;
    background: #11161e;
}

.kv-list {
    display: grid;
    gap: 8px;
}

.kv-list div {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 8px;
}

.kv-list span {
    color: #95a1b2;
    font-size: 12px;
}

.kv-list b {
    color: #d7dee9;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    font-size: 13px;
    overflow-wrap: anywhere;
}

.wifi-list,
.lease-list {
    display: grid;
    gap: 10px;
}

.wifi-list article,
.lease-list div {
    border-top: 1px solid #263142;
    padding-top: 10px;
}

.stat-card {
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 16px;
    background: #11161e;
}

.stat-card .label {
    color: #95a1b2;
    font-size: 13px;
    margin-bottom: 10px;
}

.stat-card .value {
    font-size: clamp(18px, 1.45vw, 22px);
    font-weight: 700;
    line-height: 1.35;
    overflow-wrap: anywhere;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

.sub-value {
    margin-top: 8px;
    color: #8b98aa;
    font-size: 13px;
    overflow-wrap: anywhere;
    font-variant-numeric: tabular-nums;
}

.network-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 14px;
}

.network-summary > div {
    min-width: 220px;
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 12px 14px;
    background: #11161e;
}

.network-summary .label {
    display: block;
    color: #95a1b2;
    font-size: 12px;
    margin-bottom: 6px;
}

.network-summary .sub-value {
    display: block;
    margin-top: 6px;
}

.network-summary strong {
    color: #eef2f7;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    font-size: 18px;
    letter-spacing: 0;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.network-detail-wrap {
    min-width: 0;
}

.empty-detail {
    padding: 14px;
    color: #8b98aa;
    font-size: 14px;
}

.network-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 12px;
}

.network-card {
    min-width: 0;
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 14px;
    background: #11161e;
}

.network-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.network-card-head strong,
.network-metrics strong {
    display: block;
    color: #eef2f7;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    letter-spacing: 0;
    overflow-wrap: anywhere;
    font-variant-numeric: tabular-nums;
}

.network-card-head span,
.network-metrics span,
.network-meta span,
.network-addresses span {
    color: #95a1b2;
    font-size: 12px;
}

.network-card-head em {
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 3px 8px;
    font-style: normal;
    font-size: 12px;
    font-weight: 700;
}

.link-up {
    background: #12301d;
    color: #a7f3b8;
}

.link-down {
    background: #301717;
    color: #ffb4b4;
}

.network-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 12px;
}

.network-metrics > div {
    border: 1px solid #263142;
    border-radius: 8px;
    padding: 10px;
    background: #0f141c;
}

.network-metrics small {
    display: block;
    min-height: 16px;
    margin-top: 4px;
    color: #8b98aa;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.network-meta,
.network-addresses {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px 10px;
    margin-bottom: 10px;
}

.network-addresses {
    grid-template-columns: 1fr;
}

.network-meta b,
.network-addresses b,
.network-lowlevel {
    display: block;
    color: #d7dee9;
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0;
    overflow-wrap: anywhere;
    font-variant-numeric: tabular-nums;
}

.network-lowlevel {
    border-top: 1px solid #263142;
    padding-top: 10px;
    color: #8b98aa;
    font-size: 12px;
    line-height: 1.45;
}

.chart-box {
    margin-bottom: 26px;
    background: #11161e;
    border: 1px solid #303949;
    border-radius: 8px;
    padding: 12px;
    height: 220px;
}

.chart-box:last-child {
    margin-bottom: 0;
}

.chart-box canvas {
    display: block;
}

.log-table-wrap {
    overflow-x: auto;
}

.log-table {
    width: 100%;
    border-collapse: collapse;
}

.log-table th,
.log-table td {
    border: 1px solid #2f3746;
    padding: 10px 12px;
    text-align: left;
    font-size: 14px;
}

.log-table th {
    background: #11161e;
    color: #dbe4ef;
}

.log-table td {
    color: #c7d0dc;
}

.notice {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 20;
    width: min(360px, calc(100vw - 28px));
    padding: 12px 14px;
    border: 1px solid #355173;
    border-radius: 8px;
    background: #132233;
    color: #d7ebff;
    box-shadow: 0 14px 36px rgba(0,0,0,0.35);
    transform: translateY(0);
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.notice.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
}

.notice.info {
    border-color: #355173;
    background: #132233;
    color: #d7ebff;
}

.notice.success {
    border-color: #2f5a3a;
    background: #15291b;
    color: #d6ffe0;
}

.notice.error {
    border-color: #6b2c2c;
    background: #2b1515;
    color: #ffd7d7;
}

@media (max-width: 980px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .panel.wide {
        grid-column: span 1;
    }

    .command-panel {
        flex-direction: column;
    }

    .command-grid,
    .router-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .network-card-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

@media (max-width: 640px) {
    .layout {
        padding: 14px;
    }

    .network-card-grid,
    .network-meta,
    .command-grid,
    .router-grid,
    .kv-list div {
        grid-template-columns: 1fr;
    }

    .state-box {
        grid-template-columns: 1fr;
    }

    .topbar {
        flex-direction: column;
    }

    .notice {
        top: 10px;
        right: 14px;
        left: 14px;
        width: auto;
    }

    .range-wrap input[type="range"] {
        min-width: 100%;
    }

    .range-wrap input[type="number"],
    .range-wrap .btn {
        flex: 1;
    }
}

.mode-switch {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.mode-btn {
    min-width: 110px;
}

.mode-btn.active {
    background: #e5e7eb;
    color: #111827;
    border-color: #e5e7eb;
    font-weight: 700;
}

.mode-btn.inactive {
    background: #1f2937;
    color: #f9fafb;
    border-color: #4a5568;
}

.mode-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

input:disabled,
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 수치 폰트를 기계적인 느낌의 고정폭 폰트로 변경 */
.value, .mini-value {
    font-family: "Consolas", "Monaco", "Cascadia Code", monospace;
    letter-spacing: 0;
}

/* 스로틀링 발생 시 카드 디자인 */
.stat-card.critical-alert {
    border: 1px solid #ff4d4d !important;
    background: linear-gradient(135deg, #2b1515 0%, #171b24 100%) !important;
    box-shadow: 0 0 15px rgba(255, 77, 77, 0.3);
}

.stat-card.critical-alert .label {
    color: #ff8a8a !important;
}

.stat-card.critical-alert .value {
    color: #ff4d4d;
    font-weight: 800;
    /* 긴박함을 주는 깜빡임 효과 */
    animation: alert-flash 1s infinite;
}

@keyframes alert-flash {
    0% { opacity: 1; }
    50% { opacity: 0.6; }
    100% { opacity: 1; }
}