/* ===== GX520 SaaS Dashboard — Premium Dark Theme ===== */
:root {
    --bg-deep: #050816;
    --bg-main: #0a0f1e;
    --bg-card: rgba(15, 23, 42, 0.7);
    --bg-card-hover: rgba(20, 30, 55, 0.85);
    --bg-sidebar: rgba(8, 12, 28, 0.95);
    --bg-input: rgba(15, 23, 42, 0.5);
    --border: rgba(99, 102, 241, 0.12);
    --border-hover: rgba(99, 102, 241, 0.3);
    --text: #e2e8f0;
    --text2: #94a3b8;
    --text3: #64748b;
    --accent: #6366f1;
    --accent2: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --green: #10b981;
    --green-glow: rgba(16, 185, 129, 0.15);
    --red: #ef4444;
    --red-glow: rgba(239, 68, 68, 0.15);
    --amber: #f59e0b;
    --cyan: #06b6d4;
    --purple: #a855f7;
    --radius: 12px;
    --radius-lg: 16px;
    --sidebar-w: 260px;
    --topbar-h: 56px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html,
body {
    width: 100%;
    height: 100%;
    font-family: 'Inter', 'Noto Sans KR', system-ui, sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%), radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 50%), radial-gradient(ellipse at 50% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
    animation: meshFloat 20s ease-in-out infinite;
    z-index: 0;
    pointer-events: none;
}

@keyframes meshFloat {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg)
    }

    33% {
        transform: translate(2%, -1%) rotate(1deg)
    }

    66% {
        transform: translate(-1%, 2%) rotate(-1deg)
    }
}

.hidden {
    display: none !important;
}

/* ===== Login Page ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: relative;
    z-index: 1;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    backdrop-filter: blur(20px);
    text-align: center;
    animation: fadeInUp 0.6s ease;
}

.login-logo svg {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
}

.login-title {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--text), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-subtitle {
    font-size: 0.8rem;
    color: var(--text3);
    margin-bottom: 32px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.input-group {
    text-align: left;
    margin-bottom: 16px;
}

.input-group label {
    font-size: 0.75rem;
    color: var(--text2);
    font-weight: 500;
    margin-bottom: 6px;
    display: block;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: all var(--transition);
}

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-error {
    color: var(--red);
    font-size: 0.8rem;
    margin-bottom: 12px;
    min-height: 20px;
}

.login-btn {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.3);
}

.login-footer {
    margin-top: 28px;
    font-size: 0.65rem;
    color: var(--text3);
    letter-spacing: 0.5px;
}

/* ===== Layout ===== */
#app {
    display: flex;
    height: 100vh;
    position: relative;
    z-index: 1;
}

.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(20px);
    flex-shrink: 0;
    transition: transform var(--transition);
    z-index: 100;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px 20px;
    border-bottom: 1px solid var(--border);
}

.brand-icon svg {
    width: 32px;
    height: 32px;
}

.brand-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    display: block;
    letter-spacing: -0.5px;
}

.brand-sub {
    font-size: 0.6rem;
    color: var(--text3);
    display: block;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.sidebar-section {
    padding: 14px 12px 6px;
}

.section-label {
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 0 8px 8px;
}

/* Site List */
.site-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.site-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.8rem;
    color: var(--text2);
}

.site-item:hover {
    background: var(--accent-glow);
    color: var(--text);
}

.site-item.active {
    background: var(--accent-glow);
    color: var(--accent2);
    font-weight: 600;
}

.site-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.site-dot.online {
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.site-dot.offline {
    background: var(--text3);
}

.site-count {
    font-size: 0.65rem;
    color: var(--text3);
    background: var(--bg-input);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Nav Links */
.nav-links {
    margin-top: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.8rem;
    color: var(--text2);
    text-decoration: none;
}

.nav-link:hover {
    background: var(--accent-glow);
    color: var(--text);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--accent-glow), rgba(129, 140, 248, 0.1));
    color: var(--accent2);
    font-weight: 600;
}

.nav-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.server-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    color: var(--text2);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--amber);
    animation: pulse 2s infinite;
}

.status-dot.online {
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.status-dot.offline {
    background: var(--red);
    animation: none;
}

.logout-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text3);
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.logout-btn:hover {
    border-color: var(--red);
    color: var(--red);
}

.logout-btn svg {
    width: 14px;
    height: 14px;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: 0.4
    }
}

/* ===== Mobile Header ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    align-items: center;
    padding: 0 14px;
    gap: 12px;
    z-index: 90;
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    width: 32px;
    height: 32px;
}

.menu-btn svg {
    width: 22px;
    height: 22px;
}

.mobile-brand {
    font-weight: 700;
    font-size: 0.95rem;
}

.mobile-site {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--accent2);
    background: var(--accent-glow);
    padding: 3px 10px;
    border-radius: 6px;
    font-weight: 600;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 99;
    backdrop-filter: blur(4px);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.topbar {
    height: var(--topbar-h);
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: rgba(10, 15, 30, 0.5);
    backdrop-filter: blur(10px);
}

.topbar-left {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.page-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-subtitle {
    font-size: 0.75rem;
    color: var(--text3);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.last-update {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.7rem;
    color: var(--text3);
}

.last-update svg {
    width: 13px;
    height: 13px;
}

.auto-refresh {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    color: var(--text3);
}

.icon-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text2);
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.7rem;
    font-family: inherit;
    transition: all var(--transition);
}

.icon-btn:hover {
    border-color: var(--accent);
    color: var(--accent2);
}

.icon-btn svg {
    width: 15px;
    height: 15px;
}

/* Toggle */
.toggle-label {
    position: relative;
    display: inline-block;
    width: 34px;
    height: 18px;
}

.toggle-label input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-input);
    border-radius: 18px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    left: 2px;
    top: 2px;
    background: var(--text3);
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-label input:checked+.toggle-slider {
    background: var(--accent);
    border-color: var(--accent);
}

.toggle-label input:checked+.toggle-slider::before {
    transform: translateX(16px);
    background: #fff;
}

/* ===== Views ===== */
.view {
    display: none;
    flex: 1;
    overflow: auto;
    padding: 20px 24px;
    min-height: 0;
}

.view.active {
    display: flex;
    flex-direction: column;
}

/* ===== Sensor Cards ===== */
.sensor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
    align-content: start;
}

.sensor-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px;
    backdrop-filter: blur(12px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.5s ease both;
}

.sensor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--cyan));
    opacity: 0;
    transition: opacity var(--transition);
}

.sensor-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.1);
}

.sensor-card:hover::before {
    opacity: 1;
}

.sensor-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.sensor-card .tag-label {
    font-size: 0.7rem;
    color: var(--text3);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.sensor-card .drag-handle {
    cursor: grab;
    color: var(--text3);
    font-size: 1rem;
    opacity: 0;
    transition: opacity var(--transition);
    user-select: none;
}

.sensor-card:hover .drag-handle {
    opacity: 1;
}

.sensor-card.dragging {
    opacity: 0.4;
    border: 1px dashed var(--accent);
}

.sensor-card .tag-name {
    font-size: 0.85rem;
    color: var(--text2);
    margin: 2px 0 12px;
    font-weight: 500;
}

.sensor-card .tag-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--text), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.sensor-card .tag-unit {
    font-size: 0.8rem;
    color: var(--text3);
    -webkit-text-fill-color: var(--text3);
    margin-left: 3px;
    font-weight: 400;
}

.sensor-card .tag-time {
    font-size: 0.6rem;
    color: var(--text3);
    margin-top: 10px;
}

.sensor-card .mini-chart {
    margin-top: 10px;
    height: 36px;
}

.sensor-card .mini-chart canvas {
    width: 100% !important;
    height: 36px !important;
}

/* Digital Tag */
.sensor-card.digital .tag-value {
    font-size: 1.5rem;
}

.digital-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    -webkit-text-fill-color: initial;
}

.digital-badge.on {
    background: var(--green-glow);
    color: var(--green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.digital-badge.off {
    background: var(--red-glow);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.digital-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.digital-badge.on .digital-dot {
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
}

.digital-badge.off .digital-dot {
    background: var(--red);
}

/* Gauge */
.gauge-container {
    display: flex;
    justify-content: center;
    margin: 8px 0 4px;
}

.gauge-svg {
    width: 80px;
    height: 48px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px)
    }

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

/* ===== Trend Controls ===== */
.trend-controls {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 10px;
}

.trend-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.tag-selector {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.tag-chip {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 500;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text2);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.tag-chip:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

.tag-chip.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.range-selector {
    display: flex;
    gap: 3px;
}

.range-btn {
    padding: 5px 12px;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 500;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text2);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.range-btn:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

.range-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Date Range */
.date-range-picker {
    display: flex;
    align-items: center;
    gap: 6px;
}

.date-input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 5px 10px;
    color: var(--text2);
    font-size: 0.7rem;
    font-family: inherit;
    outline: none;
    color-scheme: dark;
}

.date-input:focus {
    border-color: var(--accent);
}

.date-sep {
    color: var(--text3);
    font-size: 0.75rem;
}

.chart-container {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    backdrop-filter: blur(12px);
    min-height: 280px;
}

/* ===== Stats ===== */
.stats-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 10px;
}

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

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px;
    backdrop-filter: blur(12px);
    animation: fadeInUp 0.5s ease both;
}

.stat-card .stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.stat-card .stat-tag {
    font-size: 0.85rem;
    font-weight: 600;
}

.stat-card .stat-count {
    font-size: 0.6rem;
    color: var(--text3);
    background: var(--bg-input);
    padding: 2px 6px;
    border-radius: 4px;
}

.stat-card .stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 0;
    border-bottom: 1px solid var(--border);
}

.stat-card .stat-row:last-child {
    border: none;
}

.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text2);
}

.stat-card .stat-val {
    font-size: 0.85rem;
    font-weight: 600;
}

.stat-card .stat-val.avg {
    color: var(--accent2);
}

.stat-card .stat-val.min {
    color: var(--cyan);
}

.stat-card .stat-val.max {
    color: var(--red);
}

.stat-unit {
    font-size: 0.7rem;
    color: var(--text3);
    font-weight: 400;
    margin-left: 3px;
}

/* ===== Skeleton ===== */
.skeleton {
    position: relative;
    overflow: hidden;
}

.skeleton-shimmer {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.06), transparent);
    animation: shimmer 1.5s infinite;
}

.skeleton-item {
    height: 38px;
    border-radius: 8px;
    background: var(--bg-input);
    position: relative;
    overflow: hidden;
    margin-bottom: 4px;
}

.skeleton-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.06), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    from {
        transform: translateX(-100%)
    }

    to {
        transform: translateX(100%)
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        z-index: 100;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .mobile-header {
        display: flex;
    }

    .main-content {
        padding-top: 52px;
    }

    .topbar {
        height: 44px;
        padding: 0 14px;
    }

    .page-title {
        font-size: 0.95rem;
    }

    .view {
        padding: 12px 14px;
    }

    .sensor-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
    }

    .sensor-card {
        padding: 12px;
    }

    .sensor-card .tag-value {
        font-size: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .trend-controls {
        flex-direction: column;
    }

    .trend-right {
        align-items: stretch;
    }

    .date-range-picker {
        flex-wrap: wrap;
    }

    .login-card {
        padding: 36px 24px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        --sidebar-w: 220px;
    }

    .sensor-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}