@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;700&display=swap');

:root {
    --primary: #00ff88;
    --primary-hover: #00dd77;
    --bg-dark: #0f172a;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(15, 23, 42, 0.75);
    --glass-border: rgba(255, 255, 255, 0.15);
    --danger: #ef4444;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    overflow: hidden; /* Prevent scrolling during draw on mobile */
    touch-action: none; /* Disable default touch actions to avoid zoom/scroll */
}

.container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

/* Video & Canvases */
#videoElement, .overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    transform: scaleX(-1); /* Mirror camera horizontally */
}

/* Landmark canvas should sit on top of video, and drawing on top of both */
#drawingCanvas { z-index: 2; }
#landmarkCanvas { z-index: 3; }

/* Loader Overlay */
.loader-overlay {
    position: absolute;
    inset: 0;
    background: var(--bg-dark);
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    transition: opacity 0.5s ease;
}

.loader-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 5px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin { 
    to { transform: rotate(360deg); } 
}

/* UI Controls Panel */
.controls-panel {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    z-index: 20;
    transition: all 0.3s ease;
    width: 90%;
    max-width: 500px;
}

.header {
    text-align: center;
}

.title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #fff;
    margin-bottom: 4px;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 16px;
    background: rgba(0, 0, 0, 0.2);
    padding: 12px 20px;
    border-radius: 20px;
}

.tool-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.tool-group label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
}

.size-group {
    flex-grow: 1;
    padding: 0 10px;
}

/* Inputs & Buttons */
.color-picker-container {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 0 2px rgba(0,0,0,0);
    transition: transform 0.2s, box-shadow 0.2s;
}

.color-picker-container:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

#colorPicker {
    width: 150%;
    height: 150%;
    transform: translate(-25%, -25%); /* Hide default picker border */
    border: none;
    cursor: pointer;
}

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
    transition: transform 0.1s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    transition: all 0.2s ease;
}

.btn:hover {
    background: var(--danger);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(239, 68, 68, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    margin-top: 6px;
}
.btn-secondary:hover {
    background: var(--primary);
    color: var(--bg-dark);
    box-shadow: 0 6px 15px rgba(0, 255, 136, 0.4);
}

/* Toggles */
.mode-toggles {
    display: flex;
    gap: 20px;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.toggle-label input[type="checkbox"] {
    appearance: none;
    width: 40px;
    height: 22px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    position: relative;
    outline: none;
    cursor: pointer;
    transition: background 0.3s;
}

.toggle-label input[type="checkbox"]::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.toggle-label input[type="checkbox"]:checked {
    background: var(--primary);
}

.toggle-label input[type="checkbox"]:checked::after {
    transform: translateX(18px);
}

.toggle-label input[type="checkbox"]:checked + .toggle-text {
    color: white;
}

/* Responsiveness */
@media (max-width: 600px) {
    .controls-panel {
        bottom: 20px;
        padding: 16px 20px;
    }
    .toolbar {
        flex-wrap: wrap;
        justify-content: center;
    }
}