/* ================================
   🎨 CSS VARIABLES & DESIGN TOKENS
   ================================ */
:root {
    /* Colors - Vibrant Kids Theme */
    --color-primary: #FF6B9D;
    --color-secondary: #4FC3F7;
    --color-success: #66BB6A;
    --color-warning: #FFA726;
    --color-purple: #AB47BC;
    --color-cyan: #26C6DA;
    
    /* Gradients */
    --gradient-rainbow: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    --gradient-sunset: linear-gradient(135deg, #FA709A 0%, #FEE140 100%);
    --gradient-ocean: linear-gradient(135deg, #667eea 0%, #4facfe 100%);
    --gradient-forest: linear-gradient(135deg, #56CCF2 0%, #2F80ED 100%);
    --gradient-candy: linear-gradient(135deg, #FF6B9D 0%, #FEC163 100%);
    --gradient-purple: linear-gradient(135deg, #C471F5 0%, #FA71CD 100%);
    
    /* Backgrounds */
    --bg-primary: #FFF8F3;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    
    /* Text Colors */
    --text-primary: #2D3748;
    --text-secondary: #4A5568;
    --text-light: #718096;
    --text-white: #FFFFFF;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-colored: 0 8px 32px rgba(255, 107, 157, 0.3);
    
    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 999px;
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    
    /* Typography */
    --font-primary: 'Fredoka', sans-serif;
    --font-display: 'Bubblegum Sans', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ================================
   🔧 RESET & BASE STYLES
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ================================
   🌈 ANIMATED BACKGROUND
   ================================ */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.floating-shape {
    position: absolute;
    font-size: 48px;
    opacity: 0.2;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    top: 20%;
    right: 15%;
    animation-delay: -5s;
}

.shape-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: -10s;
}

.shape-4 {
    top: 60%;
    right: 10%;
    animation-delay: -15s;
}

.shape-5 {
    bottom: 10%;
    right: 30%;
    animation-delay: -7s;
}

.shape-6 {
    top: 40%;
    left: 5%;
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
    }
    25% {
        transform: translate(20px, -20px) rotate(10deg) scale(1.1);
    }
    50% {
        transform: translate(-15px, 15px) rotate(-10deg) scale(0.9);
    }
    75% {
        transform: translate(15px, 20px) rotate(5deg) scale(1.05);
    }
}

/* ================================
   📐 LAYOUT & CONTAINERS
   ================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
    position: relative;
    z-index: 1;
}

.screen {
    min-height: 100vh;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.screen.active {
    display: flex;
    opacity: 1;
    transform: scale(1);
}

.screen-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    animation: slideDown 0.8s var(--transition-bounce);
}

.screen-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 56px);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.screen-subtitle {
    font-size: clamp(16px, 2vw, 22px);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ================================
   🏠 WELCOME SCREEN
   ================================ */
.welcome-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 7vw, 80px);
    line-height: 1.2;
    margin-bottom: var(--space-md);
    animation: bounceIn 1s var(--transition-bounce);
}

.title-emoji {
    display: inline-block;
    animation: spin 3s linear infinite;
}

@keyframes spin {
    0%, 100% { transform: rotate(0deg) scale(1); }
    25% { transform: rotate(-10deg) scale(1.1); }
    50% { transform: rotate(0deg) scale(1); }
    75% { transform: rotate(10deg) scale(1.1); }
}

.title-text-gradient {
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: rainbow 5s linear infinite;
    background-size: 200% 200%;
}

@keyframes rainbow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.subtitle {
    font-size: clamp(18px, 3vw, 28px);
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    font-weight: 500;
    animation: fadeIn 1s var(--transition-base) 0.3s backwards;
}

.welcome-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 1s var(--transition-base) 0.5s backwards;
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--gradient-rainbow);
}

.card-icon {
    font-size: 64px;
    margin-bottom: var(--space-md);
    display: inline-block;
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-15deg); }
}

.welcome-card h2 {
    font-size: clamp(24px, 4vw, 36px);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.welcome-card p {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ================================
   🎭 AVATAR SELECTION
   ================================ */
.avatar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.avatar-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s var(--transition-base) backwards;
}

.avatar-card:nth-child(1) { animation-delay: 0.1s; }
.avatar-card:nth-child(2) { animation-delay: 0.2s; }
.avatar-card:nth-child(3) { animation-delay: 0.3s; }
.avatar-card:nth-child(4) { animation-delay: 0.4s; }
.avatar-card:nth-child(5) { animation-delay: 0.5s; }
.avatar-card:nth-child(6) { animation-delay: 0.6s; }

.avatar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-rainbow);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.avatar-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.avatar-card:hover::before {
    transform: scaleX(1);
}

.avatar-card.selected {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1), rgba(102, 126, 234, 0.1));
    box-shadow: var(--shadow-colored);
    border: 3px solid var(--color-primary);
}

.avatar-card.selected::before {
    transform: scaleX(1);
    height: 6px;
}

.avatar-image {
    width: 100%;
    height: 200px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.05), rgba(102, 126, 234, 0.05));
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.avatar-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.avatar-card:hover .avatar-image img {
    transform: scale(1.1) rotate(5deg);
}

.avatar-info {
    text-align: center;
    margin-bottom: var(--space-md);
}

.avatar-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.avatar-desc {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

.avatar-badges {
    display: flex;
    gap: var(--space-xs);
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-white);
}

.badge-blue { background: linear-gradient(135deg, #667eea, #4facfe); }
.badge-purple { background: linear-gradient(135deg, #C471F5, #FA71CD); }
.badge-pink { background: linear-gradient(135deg, #FF6B9D, #FEC163); }
.badge-orange { background: linear-gradient(135deg, #FFA726, #FF7043); }
.badge-green { background: linear-gradient(135deg, #66BB6A, #26C6DA); }
.badge-yellow { background: linear-gradient(135deg, #FFEB3B, #FFC107); }
.badge-cyan { background: linear-gradient(135deg, #26C6DA, #00ACC1); }

/* ================================
   🛤️ PATH SELECTION
   ================================ */
.selected-avatar-display {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-md);
    border-radius: 50%;
    background: var(--gradient-rainbow);
    padding: 6px;
    animation: bounceIn 0.8s var(--transition-bounce);
}

.selected-avatar-display img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-card);
}

.paths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.path-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s var(--transition-base) backwards;
}

.path-card:nth-child(1) { animation-delay: 0.1s; }
.path-card:nth-child(2) { animation-delay: 0.2s; }
.path-card:nth-child(3) { animation-delay: 0.3s; }
.path-card:nth-child(4) { animation-delay: 0.4s; }
.path-card:nth-child(5) { animation-delay: 0.5s; }
.path-card:nth-child(6) { animation-delay: 0.6s; }

.path-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    transition: height var(--transition-base);
}

.path-card:nth-child(1)::before { background: var(--gradient-ocean); }
.path-card:nth-child(2)::before { background: var(--gradient-forest); }
.path-card:nth-child(3)::before { background: var(--gradient-candy); }
.path-card:nth-child(4)::before { background: var(--gradient-purple); }
.path-card:nth-child(5)::before { background: var(--gradient-sunset); }
.path-card:nth-child(6)::before { background: var(--gradient-rainbow); }

.path-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.path-card:hover::before {
    height: 8px;
}

.path-icon {
    font-size: 72px;
    margin-bottom: var(--space-md);
    display: inline-block;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.path-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.path-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.path-features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--space-md);
    padding: 0 var(--space-md);
}

.path-features li {
    padding: var(--space-xs) 0;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
}

/* ================================
   🔘 BUTTONS
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 14px 32px;
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-rainbow);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--gradient-candy);
    color: var(--text-white);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--text-white);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 22px;
}

.btn-icon {
    font-size: 24px;
    display: inline-block;
}

.btn-back {
    margin-top: var(--space-lg);
}

/* ================================
   🎊 MODAL
   ================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    max-width: 500px;
    margin: var(--space-md);
    box-shadow: var(--shadow-xl);
    animation: modalBounce 0.5s var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--gradient-rainbow);
}

@keyframes modalBounce {
    0% {
        transform: scale(0.7);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-icon {
    font-size: 80px;
    margin-bottom: var(--space-md);
    animation: celebrationBounce 1s infinite;
}

@keyframes celebrationBounce {
    0%, 100% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.2) rotate(-10deg); }
    75% { transform: scale(1.2) rotate(10deg); }
}

.modal-content h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    font-weight: 700;
}

.modal-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-weight: 500;
}

/* ================================
   🎬 ANIMATIONS
   ================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* ================================
   📱 RESPONSIVE DESIGN
   ================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--space-md);
    }
    
    .avatar-grid,
    .paths-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .main-title {
        font-size: 40px;
    }
    
    .screen-title {
        font-size: 32px;
    }
    
    .btn-large {
        padding: 16px 32px;
        font-size: 18px;
    }
    
    .path-icon {
        font-size: 56px;
    }
    
    .card-icon {
        font-size: 48px;
    }
}

@media (max-width: 480px) {
    .avatar-image {
        height: 150px;
    }
    
    .path-features {
        padding: 0 var(--space-sm);
    }
    
    .modal-content {
        padding: var(--space-lg);
    }
    
    .floating-shape {
        font-size: 32px;
    }
}

/* ================================
   ♿ ACCESSIBILITY
   ================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles for keyboard navigation */
.btn:focus,
.avatar-card:focus,
.path-card:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 4px;
}