:root {
    /* EventHub Premium Earthy & Minimalist Palette */
    --bg-dark: #FAF7F5;
    /* Off-white / Cream */
    --bg-card: #FFFFFF;
    /* Pure White Surface */
    --primary: #965A3E;
    /* Deep Clay Brown */
    --primary-glow: rgba(150, 90, 62, 0.2);
    --secondary: #9C8C84;
    /* Muted Stone */
    --accent: #965A3E;
    --text-main: #3F2E29;
    /* Dark Charcoal Heading */
    --text-dim: #9C8C84;
    /* Muted Stone Description */
    --success: #10b981;
    --error: #ef4444;
    --glass-border: #EBE3DE;
    /* Light Almond Border */
    --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Dark Mode aesthetic (Midnight & Gold) */
    --dark-bg: #1A1A2E;
    --dark-accent: #D4AF37;
    --dark-text: #F2F2F2;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-dark: #1A1A2E;
        --bg-card: rgba(255, 255, 255, 0.05);
        --primary: #D4AF37;
        --primary-glow: rgba(212, 175, 55, 0.3);
        --text-main: #F2F2F2;
        --text-dim: #A0A0A0;
        --glass-border: rgba(212, 175, 55, 0.2);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background-image:
        radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.15) 0px, transparent 50%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Navigation & Top Bar */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

@media (prefers-color-scheme: dark) {
    .nav-bar {
        background: rgba(26, 26, 46, 0.7);
    }
}

.nav-link {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-main);
    font-size: 1rem;
    transition: var(--transition);
    opacity: 0.7;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 4px;
}

/* Bottom Bar */
.bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-top: 1px solid var(--glass-border);
    padding: 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
    z-index: 1000;
}

@media (prefers-color-scheme: dark) {
    .bottom-bar {
        background: rgba(26, 26, 46, 0.7);
    }
}

header {
    margin-top: 4rem;
    margin-bottom: 2rem;
    text-align: center;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-dim);
    font-size: 1.1rem;
}

main {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 968px) {
    main {
        grid-template-columns: 1fr;
    }
}

/* Glass Card */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Camera Section */
.camera-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    background: #000;
    border-radius: 20px;
    overflow: hidden;
    border: 2px solid var(--glass-border);
}

#video-feed {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
    /* Mirror effect */
}

#overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--primary), transparent);
    box-shadow: 0 0 15px var(--primary-glow);
    animation: scan 3s linear infinite;
    z-index: 10;
}

@keyframes scan {
    0% {
        top: 0;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        top: 100%;
        opacity: 0;
    }
}

/* Controls */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.btn-group {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.5rem;
    border-radius: 12px;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.action-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.main-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.main-btn:active {
    transform: translateY(0);
}

.main-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Status & Results */
.status-area {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 12px;
    font-size: 0.9rem;
    display: none;
}

.status-area.info {
    display: block;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid var(--primary);
}

.status-area.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.status-area.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

.results-json {
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 12px;
    margin-top: 1rem;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

/* Landmarks Toggle */
.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-dim);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #334155;
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(20px);
}