:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #22c55e;
    --background: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

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

body { 
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    padding: 1rem;
    margin-top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
}

.main-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.title-icon {
    font-size: 2.5rem;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 0 10px rgba(37, 99, 235, 0.3));
    transition: transform 0.3s ease;
}

.title-icon:hover {
    transform: scale(1.2) rotate(10deg);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
    animation: gradientShift 8s ease infinite;
    background-size: 200% 200%;
    text-shadow: 0 0 30px rgba(37, 99, 235, 0.2);
    transform-style: preserve-3d;
    perspective: 1000px;
    transition: transform 0.3s ease;
}

.gradient-text:hover {
    transform: translateZ(20px) rotateX(5deg);
    text-shadow: 0 0 40px rgba(37, 99, 235, 0.4);
}

.sub-title {
    margin-top: 0.25rem;
}

.sub-title h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.5rem 0;
    position: relative;
    display: inline-block;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.sub-title h2:hover {
    transform: translateY(-2px);
    color: var(--primary);
}

.sub-title h2::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), #4f46e5, transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.sub-title h2:hover::after {
    transform: scaleX(1);
}

.sub-title p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin: 0;
    max-width: 600px;
    margin: 0 auto;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
        filter: hue-rotate(0deg);
    }
    50% {
        background-position: 100% 50%;
        filter: hue-rotate(30deg);
    }
    100% {
        background-position: 0% 50%;
        filter: hue-rotate(0deg);
    }
}

#controls {
    background-color: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    animation: slideUp 0.6s ease-out;
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.2s ease;
    background-color: var(--surface);
    color: var(--text);
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-text {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

#submitBtn {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    position: relative;
    overflow: hidden;
}

#submitBtn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

#submitBtn:disabled {
    background: var(--secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#submitBtn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: translateX(-100%);
}

#submitBtn:hover::after {
    transform: translateX(100%);
    transition: transform 0.6s ease;
}

#loader {
    display: none;
    text-align: center;
    padding: 3rem;
    animation: fadeIn 0.3s ease-out;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.loading-text {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 500;
}

.frame-container {
    background: var(--surface);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    animation: slideUp 0.6s ease-out;
    transition: transform 0.2s ease;
}

.frame-container:hover {
    transform: translateY(-2px);
}

.frame-header {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.frame-header:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.frame-header::before {
    content: '🎨';
    font-size: 1.2em;
    animation: bounce 2s ease infinite;
    filter: drop-shadow(0 0 8px rgba(37, 99, 235, 0.2));
    transition: transform 0.3s ease;
}

.frame-header:hover::before {
    transform: scale(1.2) rotate(15deg);
}

.ux-score-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    animation: scorePop 0.5s ease-out;
}

.ux-score-container.excellent {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
}

.ux-score-container.good {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
}

.ux-score-container.fair {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.ux-score-container.poor {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.ux-score-value {
    font-size: 1.4rem;
    font-weight: 700;
}

@keyframes scorePop {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.analysis-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .analysis-content {
        grid-template-columns: 1fr;
    }
}

.heatmap-container {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background-color: var(--background);
    box-shadow: var(--shadow);
}

.heatmap-container img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius);
}

.visualization-controls {
    display: flex;
    margin-bottom: 1rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.viz-toggle-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    margin-right: 0.5rem;
}

.viz-toggle-checkbox {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.viz-toggle-btn {
    padding: 0.5rem 1rem;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    user-select: none;
}

.viz-toggle-btn:hover {
    background-color: var(--background);
}

.viz-toggle-btn::before {
    content: "";
    height: 1rem;
    width: 1rem;
    margin-right: 0.5rem;
    border-radius: 4px;
    border: 2px solid var(--secondary);
    background-color: var(--surface);
    display: inline-block;
    transition: all 0.2s ease;
}

.viz-toggle-checkbox:checked + .viz-toggle-btn::before {
    content: "✓";
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: white;
    line-height: 1;
}

.viz-toggle-checkbox:checked + .viz-toggle-btn.heatmap-btn::before {
    background-color: #ff5722;
    border-color: #e64a19;
}

.viz-toggle-checkbox:checked + .viz-toggle-btn.reach-btn::before {
    background-color: #2196f3;
    border-color: #1976d2;
}

.viz-toggle-checkbox:checked + .viz-toggle-btn.heatmap-btn {
    background: linear-gradient(135deg, #ff9800, #ff5722);
    color: white;
    border-color: #e64a19;
    box-shadow: 0 2px 5px rgba(230, 74, 25, 0.3);
}

.viz-toggle-checkbox:checked + .viz-toggle-btn.reach-btn {
    background: linear-gradient(135deg, #03a9f4, #2196f3);
    color: white;
    border-color: #1976d2;
    box-shadow: 0 2px 5px rgba(33, 150, 243, 0.3);
}

.heatmap-layer,
.reach-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    border-radius: var(--radius);
    overflow: hidden;
    display: none;
}

.heatmap-layer.active {
    display: block;
    z-index: 5;
}

.reach-layer.active {
    display: block;
    z-index: 6;
}

/* Style for the heatmap canvas */
.heatmap-layer canvas,
.reach-layer canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important; 
    height: 100% !important;
}

.ux-report {
    background-color: var(--background);
    border-radius: var(--radius);
    padding: 1.25rem;
    font-family: 'Inter', monospace;
    white-space: pre-wrap;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text);
    border: 1px solid var(--border);
}

.ux-suggestion-marker {
    position: absolute;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 20; /* Increased z-index to appear above heatmap */
    border: 2px solid white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transform: translate(-50%, -50%);
}

.ux-dropoff-marker {
    position: absolute;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 20; /* Increased z-index to appear above heatmap */
    border: 2px solid white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transform: translate(-50%, -50%);
}

.ux-suggestion-marker:hover,
.ux-dropoff-marker:hover {
    transform: translate(-50%, -50%) scale(1.2);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.suggestion-popup {
    position: fixed;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    z-index: 99999;
    max-width: 300px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
    --arrow-position: bottom;
}

.dropoff-popup {
    position: fixed;
    background: #fee2e2;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid #fecaca;
    z-index: 99999;
    max-width: 300px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
    --arrow-position: bottom;
}

.suggestion-popup.active,
.dropoff-popup.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.suggestion-popup h3,
.dropoff-popup h3 {
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.suggestion-popup h3::before {
    content: '💡';
    font-size: 1.2em;
}

.dropoff-popup h3::before {
    content: '⚠️';
    font-size: 1.2em;
}

.suggestion-popup p,
.dropoff-popup p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.dropoff-popup p {
    color: #991b1b;
}

.suggestion-popup::after,
.dropoff-popup::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
}

.suggestion-popup::after {
    top: -8px;
    border-bottom: 8px solid var(--surface);
}

.suggestion-popup[data-position="top"]::after {
    top: auto;
    bottom: -8px;
    border-bottom: none;
    border-top: 8px solid var(--surface);
}

.dropoff-popup::after {
    top: -8px;
    border-bottom: 8px solid #fee2e2;
}

.dropoff-popup[data-position="top"]::after {
    top: auto;
    bottom: -8px;
    border-bottom: none;
    border-top: 8px solid #fee2e2;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error-message {
    background-color: #fee2e2;
    border: 1px solid #fecaca;
    color: #dc2626;
    padding: 1rem;
    border-radius: var(--radius);
    margin: 1rem 0;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.success-message {
    background-color: #dcfce7;
    border: 1px solid #bbf7d0;
    color: #16a34a;
    padding: 1rem;
    border-radius: var(--radius);
    margin: 1rem 0;
    animation: slideIn 0.5s ease-out;
}

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

.nav-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.nav-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-button:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.nav-button.active {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: white;
    border-color: transparent;
}

.nav-button .icon {
    font-size: 1.2rem;
}

.nav-button .badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}