/* ============================================
   CSS Variables - Theming
   ============================================ */
:root {
    /* Colors */
    --color-primary: #FF6B6B;
    --color-primary-dark: #EE5A5A;
    --color-primary-light: #FF8585;
    --color-secondary: #4ECDC4;
    --color-success: #45B7D1;
    --color-warning: #FFA502;
    --color-danger: #FF4757;
    --color-background: #F7F9FC;
    --color-surface: #FFFFFF;
    --color-text-primary: #2C3E50;
    --color-text-secondary: #7F8C8D;
    --color-border: #E1E8ED;

    /* Prize Tier Colors */
    --color-grand: #FFD700;      /* Gold */
    --color-first: #C0C0C0;      /* Silver */
    --color-second: #CD7F32;     /* Bronze */
    --color-third: #95A5A6;       /* Gray */
    --color-participation: #3498DB; /* Blue */

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    /* Animation timings */
    --animation-duration-fast: 0.2s;
    --animation-duration-medium: 0.4s;
    --animation-duration-slow: 0.6s;
    --animation-draw: 2.5s;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-md);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Layout
   ============================================ */
header {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
}

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   Screens
   ============================================ */
.screen {
    width: 100%;
    max-width: 480px;
    text-align: center;
    transition: opacity var(--animation-duration-medium) ease;
}

.screen.hidden {
    display: none;
}

.screen.active {
    display: block;
    animation: fadeIn var(--animation-duration-medium) ease;
}

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

/* ============================================
   Prize Box
   ============================================ */
.prize-box {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    cursor: pointer;
    transition: transform var(--animation-duration-medium) ease;
    position: relative;
    overflow: hidden;
}

.prize-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
}

.prize-box:hover {
    transform: scale(1.05);
}

.prize-box.animating {
    animation: shake var(--animation-draw) ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0) rotate(0deg); }
    10% { transform: translateX(-10px) rotate(-5deg); }
    20% { transform: translateX(10px) rotate(5deg); }
    30% { transform: translateX(-10px) rotate(-5deg); }
    40% { transform: translateX(10px) rotate(5deg); }
    50% { transform: translateX(-10px) rotate(-5deg); }
    60% { transform: translateX(10px) rotate(5deg); }
    70% { transform: translateX(-10px) rotate(-5deg); }
    80% { transform: translateX(10px) rotate(5deg); }
    90% { transform: translateX(-5px) rotate(-2.5deg); }
}

.prize-box-icon {
    font-size: var(--font-size-3xl);
    color: white;
}

/* ============================================
   Instruction Text
   ============================================ */
.instruction {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--animation-duration-fast) ease;
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

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

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

.btn:not(:disabled):active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ============================================
   Draw Count
   ============================================ */
.draw-count {
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   Result Screen
   ============================================ */
.result-container {
    animation: scaleIn var(--animation-duration-medium) ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.prize-icon {
    font-size: 80px;
    margin-bottom: var(--spacing-lg);
    animation: bounceIn var(--animation-duration-slow) ease;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        opacity: 1;
        transform: scale(1.1) translateY(0);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

.prize-tier-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.prize-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-primary);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ============================================
   Modal
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    animation: fadeIn var(--animation-duration-medium) ease;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

.modal-content {
    position: relative;
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 480px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: scaleIn var(--animation-duration-medium) ease;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--animation-duration-fast) ease;
}

.modal-close:hover {
    color: var(--color-primary);
}

#modal-title {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

/* ============================================
   Prize List
   ============================================ */
.prize-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.prize-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    position: relative;
}

.prize-item-obtained {
    border-left-color: var(--color-success) !important;
}

.prize-item-obtained::after {
    content: '✓';
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: var(--color-success);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.prize-icon-small {
    font-size: var(--font-size-xl);
}

.prize-info {
    flex: 1;
}

.prize-name-small {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.prize-tier-small {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.prize-probability {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Prize tier colors */
.prize-item.grand { border-left-color: var(--color-grand); }
.prize-item.first { border-left-color: var(--color-first); }
.prize-item.second { border-left-color: var(--color-second); }
.prize-item.third { border-left-color: var(--color-third); }
.prize-item.participation { border-left-color: var(--color-participation); }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 480px) {
    header h1 {
        font-size: var(--font-size-xl);
    }

    .prize-box {
        width: 160px;
        height: 160px;
    }

    .prize-icon {
        font-size: 64px;
    }

    .action-buttons {
        gap: var(--spacing-sm);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-background: #FFFFFF;
        --color-text-secondary: #000000;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }