:root {
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    
    --color-good: #10b981;
    --color-warning: #f59e0b;
    --color-critical: #ef4444;
    --color-unknown: #64748b;

    --font-main: 'Inter', sans-serif;
    
    --header-bg: rgba(15, 23, 42, 0.8);
    --body-bg-layer: radial-gradient(circle at top right, #1e293b 0%, #0f172a 100%);
    --fs-bg: radial-gradient(circle at center, #0f172a 0%, #020617 100%);
    --brand-gradient: linear-gradient(to right, #e2e8f0, #94a3b8);
    --graph-temp: #f59e0b;
    --graph-hum: #3b82f6;
    --graph-co2: #10b981;
}

body.theme-light {
    --bg-color: #f8fafc;
    --panel-bg: rgba(255, 255, 255, 0.9);
    --panel-border: rgba(0, 0, 0, 0.1);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-color: #2563eb;
    --header-bg: rgba(255, 255, 255, 0.8);
    --body-bg-layer: radial-gradient(circle at top right, #ffffff 0%, #e2e8f0 100%);
    --fs-bg: radial-gradient(circle at center, #ffffff 0%, #cbd5e1 100%);
    --brand-gradient: linear-gradient(to right, #0f172a, #334155);
}

body.theme-antigravity {
    --bg-color: #161616;
    --panel-bg: rgba(30, 30, 30, 0.6);
    --panel-border: rgba(255, 255, 255, 0.08);
    --text-primary: #e6e6e6;
    --text-secondary: #9a9a9a;
    --accent-color: #7b9df3;
    --header-bg: rgba(22, 22, 22, 0.8);
    --body-bg-layer: radial-gradient(circle at top right, #242424 0%, #121212 100%);
    --fs-bg: radial-gradient(circle at center, #1a1a1a 0%, #000000 100%);
    --brand-gradient: linear-gradient(to right, #ffffff, #888888);
    --color-good: #ffffff;
    --accent-color: #ffffff;
    --graph-temp: #ffffff;
    --graph-hum: #9ca3af;
    --graph-co2: #4b5563;
}

body.theme-cyberpunk {
    --bg-color: #09090b;
    --panel-bg: rgba(18, 5, 27, 0.7);
    --panel-border: rgba(236, 72, 153, 0.2);
    --text-primary: #fdf2f8;
    --text-secondary: #fbcfe8;
    --accent-color: #ec4899;
    --header-bg: rgba(9, 9, 11, 0.8);
    --body-bg-layer: radial-gradient(circle at top right, #1f0b2e 0%, #09090b 100%);
    --fs-bg: radial-gradient(circle at center, #1e0933 0%, #04010a 100%);
    --brand-gradient: linear-gradient(to right, #2dd4bf, #d946ef);
    --color-good: #2dd4bf;
    --color-warning: #facc15;
    --color-critical: #f43f5e;
    --graph-temp: #f43f5e;
    --graph-hum: #2dd4bf;
    --graph-co2: #d946ef;
}

body.theme-forest {
    --bg-color: #022c22;
    --panel-bg: rgba(6, 78, 59, 0.5);
    --panel-border: rgba(167, 243, 208, 0.1);
    --text-primary: #ecfdf5;
    --text-secondary: #a7f3d0;
    --accent-color: #34d399;
    --header-bg: rgba(2, 44, 34, 0.8);
    --body-bg-layer: radial-gradient(circle at top right, #064e3b 0%, #022c22 100%);
    --fs-bg: radial-gradient(circle at center, #064e3b 0%, #022c22 100%);
    --brand-gradient: linear-gradient(to right, #6ee7b7, #10b981);
    --color-good: #34d399;
    --color-warning: #fbbf24;
    --color-critical: #ef4444;
    --graph-temp: #fbbf24;
    --graph-hum: #60a5fa;
    --graph-co2: #34d399;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    background-image: var(--body-bg-layer);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Nav */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--panel-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--accent-color);
    font-size: 1.2rem;
}

.device-dropdown {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    outline: none;
}
.device-dropdown option, .theme-dropdown option {
    background: var(--bg-color);
    color: var(--text-primary);
    font-size: 1rem;
}

.theme-dropdown {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-family: var(--font-main);
    font-weight: 500;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
}

.main-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: var(--font-main);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn:hover {
    color: var(--bg-color);
    background: var(--text-primary);
}

.nav-btn.active {
    color: var(--bg-color);
    background: var(--text-primary);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.status-dot.good { background-color: var(--color-good); box-shadow: 0 0 8px var(--color-good); }
.status-dot.warning { background-color: var(--color-warning); box-shadow: 0 0 8px var(--color-warning); }
.status-dot.critical { background-color: var(--color-critical); box-shadow: 0 0 8px var(--color-critical); }
.status-dot.unknown { background-color: var(--color-unknown); }

/* Main Content */
.app-main {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.sensor-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.sensor-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--color-unknown);
}
.sensor-card.good::before { background: var(--color-good); }
.sensor-card.warning::before { background: var(--color-warning); }
.sensor-card.critical::before { background: var(--color-critical); }

.sensor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.card-header i {
    font-size: 1.2rem;
}

/* Icon Health Colors */
.icon-good { color: var(--color-good); text-shadow: 0 0 12px var(--color-good); }
.icon-warning { color: var(--color-warning); text-shadow: 0 0 12px var(--color-warning); }
.icon-critical { color: var(--color-critical); text-shadow: 0 0 12px var(--color-critical); }
.icon-unknown { color: var(--text-secondary); }

.card-value-container {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.card-value {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.card-unit {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.8rem;
    background: color-mix(in srgb, var(--text-primary) 10%, transparent);
}
.sensor-card.good .status-badge { color: var(--color-good); background: color-mix(in srgb, var(--color-good) 15%, transparent); }
.sensor-card.warning .status-badge { color: var(--color-warning); background: color-mix(in srgb, var(--color-warning) 15%, transparent); }
.sensor-card.critical .status-badge { color: var(--color-critical); background: color-mix(in srgb, var(--color-critical) 15%, transparent); }
.sensor-card.good .card-value { color: var(--color-good); }
.sensor-card.warning .card-value { color: var(--color-warning); }
.sensor-card.critical .card-value { color: var(--color-critical); }

/* Panels */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

select {
    background: var(--panel-bg);
    color: var(--text-primary);
    border: 1px solid var(--panel-border);
    padding: 0.5rem;
    border-radius: 6px;
    font-family: inherit;
    outline: none;
}

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid var(--panel-border);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:hover td {
    background: color-mix(in srgb, var(--text-primary) 5%, transparent);
}

.val-good { color: var(--color-good); font-weight: 600; }
.val-warning { color: var(--color-warning); font-weight: 600; }
.val-critical { color: var(--color-critical); font-weight: 600; }

/* Chart */
.chart-container {
    height: 400px;
    width: 100%;
}

/* Progress Bar */
.progress-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--panel-border);
    z-index: 1000;
}

.progress-bar {
    height: 100%;
    width: 100%;
    background: var(--color-good);
    transition: width 1s linear, background-color 0.5s;
}

/* Fullscreen Mode - Premium Redesign */
.fullscreen-mode {
    position: fixed !important;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--fs-bg);
    z-index: 1000;
    padding: clamp(1rem, 3vh, 3rem) clamp(2rem, 5vw, 5rem);
    display: flex !important;
    flex-direction: column;
    overflow: hidden; /* Prvent scrolling in fullscreen */
    outline: none;
    border: none;
}
*:focus { outline: none; }
.view.hidden.fullscreen-mode {
    display: none !important;
}

.fs-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: clamp(1rem, 3vh, 3rem);
    border-bottom: none;
    padding-bottom: clamp(1rem, 1.5vh, 1.5rem);
    flex-shrink: 0;
}
.fs-header h1 {
    font-size: clamp(2.5rem, 5vh, 4rem);
    font-weight: 800;
    letter-spacing: -1px;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.fs-indicator {
    font-size: clamp(1.2rem, 2.5vh, 1.75rem);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: color-mix(in srgb, var(--bg-color) 80%, transparent);
    padding: clamp(0.5rem, 1vh, 0.75rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: 50px;
    border: 1px solid var(--panel-border);
}
.fs-indicator .status-dot {
    width: clamp(12px, 2vh, 18px); 
    height: clamp(12px, 2vh, 18px);
}
.fs-dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: clamp(1.5rem, 3vh, 3rem);
    flex: 1;
    min-height: 0; /* Important for flex children scrolling */
}
.fs-dashboard-grid .sensor-card {
    padding: clamp(2rem, 4vh, 3.5rem);
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: clamp(16px, 4vh, 32px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.fs-dashboard-grid .sensor-card::before {
    height: 6px;
    opacity: 0.8;
}

/* Status-based Glowing and Pulsing */
.fs-dashboard-grid .sensor-card.good {
    box-shadow: 0 0 40px rgba(255, 255, 255, 0.03) inset, 0 10px 30px rgba(0,0,0,0.5);
}
.fs-dashboard-grid .sensor-card.warning {
    box-shadow: 0 0 60px rgba(245, 158, 11, 0.15) inset, 0 10px 30px rgba(0,0,0,0.5);
    border-color: rgba(245, 158, 11, 0.3);
    animation: fsPulseWarning 4s infinite alternate;
}
.fs-dashboard-grid .sensor-card.critical {
    box-shadow: 0 0 80px rgba(239, 68, 68, 0.2) inset, 0 10px 30px rgba(0,0,0,0.5);
    border-color: rgba(239, 68, 68, 0.4);
    animation: fsPulseCritical 2s infinite alternate;
}

@keyframes fsPulseWarning {
    from { box-shadow: 0 0 40px rgba(245, 158, 11, 0.1) inset, 0 10px 30px rgba(0,0,0,0.5); }
    to { box-shadow: 0 0 80px rgba(245, 158, 11, 0.25) inset, 0 10px 30px rgba(0,0,0,0.5); }
}
@keyframes fsPulseCritical {
    from { box-shadow: 0 0 50px rgba(239, 68, 68, 0.2) inset, 0 10px 30px rgba(0,0,0,0.5); }
    to { box-shadow: 0 0 100px rgba(239, 68, 68, 0.4) inset, 0 10px 30px rgba(0,0,0,0.5); }
}

.fs-dashboard-grid .card-header h3 {
    font-size: clamp(1.8rem, 4vh, 2.8rem);
    font-weight: 600;
    letter-spacing: 0.02em;
}
.fs-dashboard-grid .card-header i {
    font-size: clamp(2rem, 5vh, 3.5rem);
    opacity: 0.8;
}
.fs-dashboard-grid .card-value-container {
    margin-top: auto;
    margin-bottom: clamp(1rem, 2vh, 2rem);
}
.fs-dashboard-grid .card-value {
    font-size: clamp(6rem, 16vh, 12rem);
    font-weight: 800;
    letter-spacing: -2px;
    text-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.fs-dashboard-grid .card-unit {
    font-size: clamp(2.5rem, 5vh, 4rem);
    font-weight: 500;
    opacity: 0.7;
    margin-left: 1rem;
}
.fs-dashboard-grid .card-footer {
    font-size: clamp(1rem, 2vh, 1.5rem);
    flex-shrink: 0;
}
.fs-dashboard-grid .status-badge {
    font-size: clamp(1.2rem, 2.5vh, 2rem);
    padding: clamp(0.5rem, 1vh, 0.75rem) clamp(1.5rem, 3vh, 2.5rem);
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
}
.fs-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: clamp(1rem, 3vh, 3rem);
    font-size: clamp(1.2rem, 2vh, 1.5rem);
    color: var(--text-secondary);
    font-weight: 500;
    flex-shrink: 0;
}

.btn-icon {
    background: color-mix(in srgb, var(--text-primary) 5%, transparent);
    border: 1px solid var(--panel-border);
    border-radius: 50%;
    width: clamp(40px, 6vh, 60px);
    height: clamp(40px, 6vh, 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: clamp(1.5rem, 3vh, 2rem);
    cursor: pointer;
    transition: all 0.3s;
}
.btn-icon:hover {
    background: rgba(255,255,255,0.15);
    color: white;
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 1rem;
    }
    .main-nav {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
}