:root {
    --bg-color: #040408;
    --panel-bg: rgba(20, 20, 30, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary-hsl: 250, 100%, 65%;
    --primary-color: hsl(var(--primary-hsl));
    --accent-color: #00f3ff;
    --text-main: #ffffff;
    --text-muted: #8892b0;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(76, 29, 149, 0.2) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0, 243, 255, 0.1) 0%, transparent 20%);
    color: var(--text-main);
    font-family: var(--font-family);
    min-height: 100vh;
    overflow-x: hidden;
    /* Prevent horizontal scroll only */
    overflow-y: auto;
    /* Allow vertical scroll */
}

/* Page Layout Wrapper */
.page-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header / Hero Section */
.hero {
    text-align: center;
    padding: 3rem 1rem;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #b8b8b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Main App Container - Now a section within the page */
.app-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    height: 800px;
    /* Fixed height for the dashboard area to keep it contained */
    margin-bottom: 4rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .app-container {
        grid-template-columns: 1fr;
        height: auto;
    }

    .sidebar {
        width: 100%;
        margin-bottom: 2rem;
    }

    .viewport {
        height: 500px;
        /* Min height for canvas on mobile */
    }
}

.sidebar {
    width: 100%;
    /* Take full width of grid column */
    height: 100%;
    padding: 0;
    z-index: 10;
    position: relative;
    display: flex;
    flex-direction: column;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    height: 100%;
    overflow-y: auto;
    /* Allow sidebar internal scroll if needed */
}

h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #a5a5a5 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.control-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.input-wrapper input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.2);
}

button {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s;
}

button:active {
    transform: scale(0.98);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), #8a2be2);
    color: white;
    box-shadow: 0 4px 15px rgba(138, 43, 226, 0.4);
}

.primary-btn:hover {
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.6);
}

.primary-btn:disabled,
.primary-btn.disabled {
    background: #444;
    color: #888;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.secondary-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.2);
}

.secondary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.stats {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stat-item .value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.viewport {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

#canvas-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.5);
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* Legend Styles */
.legend {
    margin-top: 2rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 1.5rem;
}

.legend h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin-bottom: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-main);
}

.legend-item .icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 12px;
    display: inline-block;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.legend-item .icon.gateway {
    background: #00f3ff;
    box-shadow: 0 0 8px #00f3ff;
}

.legend-item .icon.head {
    background: transparent;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 10px var(--primary-color);
    width: 14px;
    height: 14px;
}

.legend-item .icon.high-batt {
    background: #00ff00;
}

.legend-item .icon.med-batt {
    background: #ffff00;
}

.legend-item .icon.low-batt {
    background: #ff9900;
}

.legend-item .icon.dead {
    width: 10px;
    height: 10px;
    background: transparent;
    position: relative;
}

.legend-item .icon.dead::before,
.legend-item .icon.dead::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 2px;
    background: red;
}

.legend-item .icon.dead::before {
    transform: translate(-50%, -50%) rotate(45deg);
}

.legend-item .icon.dead::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

/* --- Analytics Section --- */
.analytics-container {
    max-width: 1200px;
    margin: 4rem auto;
    background: rgba(10, 10, 20, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.analytics-header {
    text-align: center;
    margin-bottom: 2rem;
}

.analytics-header h2 {
    font-size: 2rem;
    background: linear-gradient(90deg, #00f3ff, #00ff00);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.analytics-header p {
    color: var(--text-muted);
}

.analytics-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
}

/* Upload Zone */
.upload-box {
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.02);
}

.upload-box:hover {
    border-color: var(--accent-color);
    background: rgba(0, 243, 255, 0.05);
}

.upload-box .icon {
    display: block;
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    background: var(--text-muted);
    /* Placeholder for an icon */
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E") no-repeat center;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E") no-repeat center;
    background-color: var(--accent-color);
}

.status-box {
    margin-top: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Video Feed */
.video-feed-wrapper {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--glass-border);
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.1);
}

.video-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    background: radial-gradient(circle at center, #111 0%, #000 100%);
}

#detectionFeed {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

@media (max-width: 900px) {
    .analytics-content {
        grid-template-columns: 1fr;
    }
}

/* --- Dashboard Panel --- */
.dashboard-panel {
    margin-top: 1rem;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.dashboard-panel h3 {
    font-size: 1.1rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.dash-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--glass-border);
}

.dash-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.dash-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ff4444;
    /* Alert color for failures */
}

/* List container for dead nodes */
.dead-nodes-list-container {
    max-height: 150px;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 0.5rem;
}

.dead-nodes-list-container h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    position: sticky;
    top: 0;
    background: rgba(24, 24, 30, 0.9);
    padding: 0.2rem 0;
}

.dead-nodes-list {
    list-style: none;
    padding: 0;
}

.dead-node-item {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0.8rem;
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.85rem;
}

.dead-node-item:last-child {
    border-bottom: none;
}

.dead-node-id {
    color: #ff4444;
    font-weight: 600;
}

.dead-node-time {
    color: var(--text-muted);
}