/* ===================================================================
   SNOWBALL CREATOR - MODERN CSS ARCHITECTURE
   ================================================================ */

/* CSS VARIABLES - Design System Foundation */
:root {
    /* Color Palette */
    --snow-white: #ffffff;
    --ice-blue: #e1f5fe;
    --frost-blue: #b3e5fc;
    --winter-blue: #4fc3f7;
    --deep-winter: #0277bd;
    --silver-gray: #eceff1;
    --snow-shadow: rgba(178, 223, 249, 0.3);
    --ice-shadow: rgba(129, 212, 250, 0.4);
    
    /* Typography */
    --font-size-hero: 1.25rem;
    --font-size-base: 0.85rem;
    --font-size-large: 1rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 0.875rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-hero: 0.4s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-hero: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

/* ===================================================================
   BASE STYLES & LAYOUT
   ================================================================ */

body {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
    min-height: 100vh;
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.main-container {
    position: relative;
    z-index: 10;
}

/* ===================================================================
   COMPONENT STYLES - CARDS & CONTAINERS
   ================================================================ */

.winter-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--snow-shadow);
    box-shadow: 0 8px 32px var(--snow-shadow);
    border-radius: var(--radius-lg);
    transition: box-shadow var(--transition-base);
}

.winter-card:hover {
    box-shadow: 0 12px 40px var(--snow-shadow);
}

.section-header {
    display: flex;
    align-items: center;
    font-size: var(--font-size-large);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: #374151;
}

.section-header .emoji {
    margin-right: var(--spacing-sm);
}

/* ===================================================================
   HERO SECTION - MAIN INPUT & BUTTON
   ================================================================ */

.hero-section {
    width: 100%;
    text-align: center;
}

.hero-input-container {
    max-width: 48rem;
    margin: 0 auto;
}

.hero-input {
    font-size: var(--font-size-hero);
    padding: var(--spacing-lg);
    min-height: 4rem;
    border: 3px solid var(--winter-blue);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 10px 40px var(--snow-shadow);
    transition: all var(--transition-hero);
    border-radius: var(--radius-xl);
    width: 100%;
    text-align: center;
}

.hero-input:focus {
    border-color: var(--deep-winter);
    box-shadow: 0 0 0 4px var(--snow-shadow), 0 15px 50px var(--ice-shadow);
    background: var(--snow-white);
    transform: translateY(-2px);
    outline: none;
}

.hero-button-container {
    margin-top: var(--spacing-xl);
}

.hero-button {
    font-size: 1.1rem;
    padding: 1.25rem var(--spacing-2xl);
    background: linear-gradient(145deg, var(--winter-blue), var(--deep-winter));
    border: none;
    color: white;
    font-weight: bold;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.hero-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.hero-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.6);
    background: linear-gradient(145deg, var(--deep-winter), #01579b);
}

.hero-button:hover::before {
    left: 100%;
}

.hero-button:active {
    transform: translateY(-1px);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.5);
}

/* ===================================================================
   OPTIONS SECTION - INTERACTIVE CHOICES
   ================================================================ */

.options-section {
    margin-bottom: var(--spacing-xl);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

@media (min-width: 768px) {
    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .options-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.winter-option {
    background: linear-gradient(145deg, var(--ice-blue), var(--frost-blue));
    border: 1px solid var(--winter-blue);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
}

.winter-option:hover {
    background: linear-gradient(145deg, var(--frost-blue), var(--winter-blue));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--ice-shadow);
}

.winter-option::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
    transform: rotate(45deg);
    transition: all var(--transition-slow);
    opacity: 0;
}

.winter-option:hover::before {
    opacity: 1;
    animation: shimmer 1.5s ease-in-out;
}

.option-content {
    position: relative;
    z-index: 10;
    text-align: center;
    pointer-events: none; /* Let clicks pass through to parent */
}

.option-content * {
    pointer-events: none; /* Ensure all child elements don't block clicks */
}

.option-emoji {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.option-label {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: #374151;
}

/* Custom Input Option */
.custom-input-option .option-label {
    font-size: 0.75rem;
    color: #6b7280;
    margin-bottom: var(--spacing-sm);
}

.custom-option-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--frost-blue);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.custom-option-input:focus {
    border-color: var(--winter-blue);
    box-shadow: 0 0 0 3px var(--snow-shadow);
    background: var(--snow-white);
    outline: none;
}

.submit-button {
    background: linear-gradient(145deg, var(--winter-blue), var(--deep-winter));
    border: none;
    color: white;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    width: 100%;
    cursor: pointer;
    transition: all var(--transition-base);
}

.submit-button:hover {
    background: linear-gradient(145deg, var(--deep-winter), #01579b);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px var(--ice-shadow);
}

/* Fill Animation for Options */
.winter-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--winter-blue), var(--deep-winter));
    opacity: 0.6;
    transition: width 0.3s ease-out;
    pointer-events: none; /* Ensure this doesn't block clicks */
}

/* ===================================================================
   ACTIVE NODE & PATH DISPLAY
   ================================================================ */

.winter-active {
    background: linear-gradient(145deg, var(--frost-blue), var(--ice-blue));
    border: 2px solid var(--winter-blue);
    box-shadow: 0 4px 15px var(--snow-shadow);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.active-node {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(145deg, var(--frost-blue), var(--ice-blue));
    border: 2px solid var(--winter-blue);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
    color: #374151;
}

.path-display {
    margin-top: var(--spacing-xl);
}

.winter-path {
    background: linear-gradient(145deg, var(--silver-gray), var(--ice-blue));
    border: 1px solid var(--frost-blue);
}

.path-content {
    background: linear-gradient(145deg, var(--silver-gray), var(--ice-blue));
    border: 1px solid var(--frost-blue);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.path-essay {
    color: #374151;
    line-height: 1.625;
}

.path-starting-text {
    font-weight: 500;
    color: #1d4ed8;
}

.path-step-text {
    font-weight: 500;
    color: #374151;
}

/* ===================================================================
   TREE VISUALIZATION
   ================================================================ */

.tree-container {
    overflow-x: auto;
    padding: var(--spacing-xl);
    background: linear-gradient(to bottom, #f8fafc, white);
    border-radius: var(--radius-lg);
    min-height: 24rem;
}

.tree-level {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin: var(--spacing-xl) 0;
    position: relative;
}

.tree-node {
    background: linear-gradient(145deg, var(--ice-blue), var(--frost-blue));
    border: 2px solid var(--winter-blue);
    border-radius: var(--radius-xl);
    padding: 0.75rem var(--spacing-md);
    margin: 0 var(--spacing-md);
    box-shadow: 0 4px 15px var(--snow-shadow);
    transition: all var(--transition-base);
    position: relative;
    min-width: 120px;
    max-width: 180px;
    text-align: center;
    font-size: var(--font-size-base);
    line-height: 1.3;
}

.tree-node:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--ice-shadow);
}

.tree-node.chosen {
    background: linear-gradient(145deg, var(--winter-blue), var(--deep-winter));
    color: white;
    font-weight: bold;
    border-color: var(--deep-winter);
}

.tree-node.chosen.custom {
    background: linear-gradient(145deg, #7c3aed, #5b21b6);
    border-color: #5b21b6;
    position: relative;
}

.tree-node.chosen.custom::after {
    content: '✏️';
    position: absolute;
    top: -8px;
    right: -8px;
    background: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.tree-node.alternative {
    background: linear-gradient(145deg, #f8fafc, #e2e8f0);
    border: 2px dashed var(--silver-gray);
    opacity: 0.7;
    font-style: italic;
}

.tree-node.root {
    background: linear-gradient(145deg, #065f46, #047857);
    color: white;
    font-weight: bold;
    font-size: var(--font-size-large);
    min-width: 200px;
    border-color: #047857;
}

/* Tree Connections */
.tree-connections {
    position: absolute;
    top: -var(--spacing-md);
    left: 0;
    right: 0;
    height: var(--spacing-xl);
    pointer-events: none;
}

.tree-branch {
    position: absolute;
    background: var(--winter-blue);
    opacity: 0.6;
}

.tree-branch.vertical {
    width: 2px;
    height: var(--spacing-md);
    top: 0;
}

.tree-branch.horizontal {
    height: 2px;
    top: var(--spacing-md);
}

/* ===================================================================
   ANIMATIONS
   ================================================================ */

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

@keyframes treeGrow {
    from {
        opacity: 0;
        transform: scale(0.3) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes snowfall {
    0% {
        transform: translateY(-100vh) translateX(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) translateX(var(--drift, 0px)) rotate(360deg);
        opacity: 0;
    }
}

/* Wind Animation - Fade in from left to right */
.wind-enter {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease-out;
}

.wind-enter.animate {
    opacity: 1;
    transform: translateX(0);
}

/* Staggered animation delays */
.wind-delay-1 { transition-delay: 0.2s; }
.wind-delay-2 { transition-delay: 0.4s; }
.wind-delay-3 { transition-delay: 0.6s; }
.wind-delay-4 { transition-delay: 0.8s; }
.wind-delay-5 { transition-delay: 1.0s; }

.tree-node.animate-in {
    animation: treeGrow 0.6s ease-out;
}

/* ===================================================================
   SNOWFALL EFFECT
   ================================================================ */

.snowfall {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.snowflake {
    position: absolute;
    color: var(--snow-white);
    font-size: 1em;
    animation: snowfall linear infinite;
    opacity: 0.8;
}

/* ===================================================================
   UTILITY CLASSES
   ================================================================ */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.flex {
    display: flex;
}

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

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

.w-full {
    width: 100%;
}

.cursor-pointer {
    cursor: pointer;
}

/* ===================================================================
   LEGACY SUPPORT - EXISTING CLASSES FROM BLADE
   ================================================================ */

.winter-input {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--frost-blue);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.winter-input:focus {
    border-color: var(--winter-blue);
    box-shadow: 0 0 0 3px var(--snow-shadow);
    background: var(--snow-white);
    outline: none;
}

.winter-btn {
    background: linear-gradient(145deg, var(--winter-blue), var(--deep-winter));
    border: none;
    color: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.winter-btn:hover {
    background: linear-gradient(145deg, var(--deep-winter), #01579b);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px var(--ice-shadow);
}

/* ===================================================================
   RESPONSIVE DESIGN
   ================================================================ */

@media (max-width: 640px) {
    .hero-input {
        font-size: 1rem;
        padding: var(--spacing-md);
    }
    
    .hero-button {
        font-size: 1rem;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .tree-container {
        padding: var(--spacing-md);
    }
    
    .tree-node {
        min-width: 100px;
        max-width: 140px;
        font-size: 0.75rem;
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-input-container {
        max-width: none;
        margin: 0;
    }
    
    .hero-input {
        font-size: 1rem;
        padding: var(--spacing-md);
    }
    
    .hero-button {
        font-size: 0.9rem;
        padding: var(--spacing-md) var(--spacing-lg);
        width: 100%;
    }
}

/* ===================================================================
   ENHANCED VISUAL FEEDBACK & ACCESSIBILITY
   ================================================================ */

/* Pulse animation for active node */
@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 10px var(--winter-blue);
    }
    50% {
        box-shadow: 0 0 20px var(--winter-blue), 0 0 30px var(--frost-blue);
    }
}

.winter-active {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* Improved option hover states */
.option-box {
    transition: all var(--transition-base);
}

.option-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--snow-shadow);
}

.option-box:active {
    transform: translateY(-1px);
}

/* Better focus states for accessibility */
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--winter-blue);
    outline-offset: 2px;
}

/* Loading state for options */
.option-box.selecting {
    pointer-events: none;
}

/* Toast notification styles */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Control buttons responsive layout */
@media (max-width: 640px) {
    #control-buttons {
        flex-wrap: wrap;
    }
    
    #control-buttons button {
        flex: 1 1 auto;
        min-width: 80px;
    }
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}
    
    .winter-option {
        padding: var(--spacing-md);
    }
}