/* ===================================
   CSS Variables & Theme
   =================================== */
:root {
    /* Colors - Earthy, cartographic palette */
    --color-bg: #0d1117;
    --color-bg-elevated: #161b22;
    --color-bg-card: #1c2128;
    --color-border: #30363d;
    --color-border-light: #484f58;
    
    --color-text-primary: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;
    
    --color-accent: #58a6ff;
    --color-accent-hover: #79b8ff;
    --color-success: #3fb950;
    --color-warning: #d29922;
    --color-highlight: #f0883e;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-earth: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Typography */
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(88, 166, 255, 0.15);
}

/* ===================================
   Reset & Base Styles
   =================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===================================
   App Container & Background
   =================================== */
.app-container {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.bg-gradient {
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(88, 166, 255, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 100%, rgba(118, 75, 162, 0.1), transparent);
    pointer-events: none;
    z-index: 0;
}

/* ===================================
   Header
   =================================== */
.header {
    position: relative;
    z-index: 10;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* ===================================
   Main Content & Screens
   =================================== */
.main-content {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.screen {
    display: none;
    width: 100%;
    max-width: 900px;
    animation: fadeIn 0.5s ease-out;
}

.screen.active {
    display: block;
}

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

/* ===================================
   Welcome Screen
   =================================== */
#welcome-screen {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

#welcome-screen.active {
    display: grid;
}

.welcome-content {
    max-width: 500px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.hero-title .highlight {
    background: var(--gradient-earth);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.feature-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.pill {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-xs) var(--space-md);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Map Preview Animation */
.welcome-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.map-preview {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: var(--radius-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.map-layer {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
    animation: pulse 4s ease-in-out infinite;
}

.layer-1 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.3), rgba(0, 242, 254, 0.1));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 0s;
}

.layer-2 {
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.4), rgba(118, 75, 162, 0.2));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 0.5s;
}

.layer-3 {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(240, 136, 62, 0.5), rgba(240, 136, 62, 0.2));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 1s;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.8;
    }
}

.map-marker {
    position: absolute;
    font-size: 1.5rem;
    animation: bounce 2s ease-in-out infinite;
}

.marker-1 {
    top: 25%;
    left: 30%;
    animation-delay: 0s;
}

.marker-2 {
    top: 45%;
    left: 65%;
    animation-delay: 0.3s;
}

.marker-3 {
    top: 70%;
    left: 40%;
    animation-delay: 0.6s;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

/* ===================================
   Buttons
   =================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-elevated);
    border-color: var(--color-border-light);
    color: var(--color-text-primary);
}

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

/* ===================================
   Quiz Screen
   =================================== */
.quiz-container {
    width: 100%;
}

.progress-bar {
    position: relative;
    height: 4px;
    background: var(--color-bg-elevated);
    border-radius: 100px;
    margin-bottom: var(--space-xl);
    overflow: hidden;
}

.progress-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--gradient-earth);
    border-radius: 100px;
    transition: width 0.4s ease;
    width: 0%;
}

.progress-text {
    position: absolute;
    right: 0;
    top: calc(100% + var(--space-sm));
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.question-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    margin-bottom: var(--space-xl);
    min-height: 400px;
}

.question-header {
    margin-bottom: var(--space-xl);
}

.question-number {
    display: inline-block;
    background: var(--color-bg-elevated);
    color: var(--color-accent);
    padding: var(--space-xs) var(--space-md);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.question-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.question-description {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.options-grid {
    display: grid;
    gap: var(--space-md);
}

.option-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    background: var(--color-bg-elevated);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-card:hover {
    border-color: var(--color-border-light);
    background: rgba(88, 166, 255, 0.05);
}

.option-card.selected {
    border-color: var(--color-accent);
    background: rgba(88, 166, 255, 0.1);
}

.option-indicator {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.option-card.selected .option-indicator {
    border-color: var(--color-accent);
    background: var(--color-accent);
}

.option-indicator::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-bg);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.option-card.selected .option-indicator::after {
    opacity: 1;
}

/* Checkbox style for multi-select */
.option-card[data-multi="true"] .option-indicator {
    border-radius: var(--radius-sm);
}

.option-card[data-multi="true"].selected .option-indicator::after {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230d1117' stroke-width='3'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/contain no-repeat;
}

.option-content {
    flex: 1;
}

.option-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.option-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.option-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ===================================
   Results Screen
   =================================== */
.results-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.results-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.results-badge {
    display: inline-block;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    border-radius: 100px;
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
}

.results-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.results-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.recommendations {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.recommendation-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-lg);
    align-items: start;
    transition: all 0.2s ease;
}

.recommendation-card:hover {
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-md);
}

.recommendation-card.top-pick {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.recommendation-rank {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.rank-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border-radius: 50%;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
}

.top-pick .rank-number {
    background: var(--color-accent);
    color: var(--color-bg);
}

.rank-label {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.recommendation-content {
    min-width: 0;
}

.recommendation-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.recommendation-tagline {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.recommendation-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.tag {
    background: var(--color-bg-elevated);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.tag.highlight {
    background: rgba(88, 166, 255, 0.15);
    color: var(--color-accent);
}

.recommendation-reasons {
    list-style: none;
}

.recommendation-reasons li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.recommendation-reasons li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.recommendation-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.recommendation-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.recommendation-link:hover {
    color: var(--color-accent-hover);
}

.recommendation-link svg {
    width: 16px;
    height: 16px;
}

.results-actions {
    display: flex;
    justify-content: center;
}

/* ===================================
   AI Insight Section
   =================================== */
.ai-insight-container {
    margin-bottom: var(--space-xl);
}

.ai-insight-card {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 1px solid rgba(88, 166, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
}

.ai-insight-card.unavailable {
    background: linear-gradient(135deg, rgba(210, 153, 34, 0.1) 0%, rgba(240, 136, 62, 0.1) 100%);
    border-color: rgba(210, 153, 34, 0.3);
}

.ai-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.ai-content {
    flex: 1;
    min-width: 0;
}

.ai-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.ai-insight-card.unavailable .ai-label {
    color: var(--color-warning);
}

.ai-text {
    color: var(--color-text-primary);
    line-height: 1.7;
    margin: 0;
}

.ai-loading {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-secondary);
}

.loading-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: loadingPulse 1.4s ease-in-out infinite;
}

.loading-dot:nth-child(1) {
    animation-delay: 0s;
}

.loading-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingPulse {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===================================
   Footer
   =================================== */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-xl);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    #welcome-screen.active {
        display: flex;
        flex-direction: column;
        text-align: center;
    }

    .welcome-visual {
        order: -1;
        margin-bottom: var(--space-xl);
    }

    .map-preview {
        width: 240px;
        height: 240px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .feature-pills {
        justify-content: center;
    }

    .question-container {
        padding: var(--space-lg);
    }

    .recommendation-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .recommendation-rank {
        flex-direction: row;
        justify-content: center;
    }

    .recommendation-tags {
        justify-content: center;
    }

    .recommendation-reasons li {
        text-align: left;
    }

    .recommendation-links {
        align-items: center;
    }
}