/* ============================================
   Ballin' Cards - Base Styles
   Variables, Reset, Typography, Buttons
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Russo+One&family=Barlow+Condensed:wght@500;600;700&display=swap');

:root {
    /* Core Color Palette - Warm, inviting, basketball-inspired */
    --primary-orange: #FF6B35;
    --primary-orange-dark: #E64A19;
    --accent-cyan: #00D4D4;
    --accent-cyan-dark: #00A0A0;
    --primary-blue: #1E88E5;
    --pop-yellow: #FFD700;
    --pop-lime: #76FF03;
    --pop-purple: #AB47BC;
    --danger-red: #E63946;
    --success-green: #2E7D32;
    --success-bright: #3FB950;

    /* Background Colors */
    --bg-cream: #FFF8E7;
    --bg-tan: #F5E6D3;
    --dark-brown: #2D1B0E;
    --court-wood: #C4956A;
    --court-wood-light: #D4A57A;
    --court-wood-dark: #A67C52;

    /* Text Colors */
    --text-dark: #2D1B0E;
    --text-medium: #5D4E37;
    --text-light: #8B7355;
    --text-primary: #E6EDF3;
    --text-secondary: rgba(230, 237, 243, 0.7);

    /* Card Colors - Updated with specific card colors */
    --card-offense-base: #FF6B35;
    --card-defense-base: #00D4D4;
    --card-valid-glow: #76FF03;

    /* Typography */
    --font-display: 'Russo One', sans-serif;
    --font-body: 'Nunito', sans-serif;
    --font-condensed: 'Barlow Condensed', sans-serif;

    /* Card Sizing - Base sizes for trading cards */
    --card-width: 90px;
    --card-height: 120px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-card: 10px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(45, 27, 14, 0.1);
    --shadow-md: 0 4px 8px rgba(45, 27, 14, 0.15);
    --shadow-lg: 0 8px 16px rgba(45, 27, 14, 0.2);

    /* Spacing Scale */
    --space-xs: 0.25rem;   /* 4px */
    --space-sm: 0.5rem;    /* 8px */
    --space-md: 0.75rem;   /* 12px */
    --space-lg: 1rem;      /* 16px */
    --space-xl: 1.5rem;    /* 24px */
    --space-2xl: 2rem;     /* 32px */
}

/* ============================================
   Reset & Base
   ============================================ */

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

body {
    font-family: var(--font-body);
    background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg-tan) 100%);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.4;
}

#app {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3 {
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h1 {
    font-size: 3.5rem;
    text-shadow: 4px 4px 0 var(--primary-orange), 6px 6px 0 rgba(45, 27, 14, 0.2);
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.75rem;
    text-shadow: 2px 2px 0 var(--primary-orange);
    margin-bottom: 0.75rem;
}

/* ============================================
   Button Styles
   ============================================ */

.btn {
    font-family: var(--font-body);
    font-weight: 800;
    font-size: 1rem;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    border: 4px solid var(--dark-brown);
    cursor: pointer;
    transition: all 0.15s ease;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-align: center;
    background: linear-gradient(180deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white;
    box-shadow: 4px 4px 0 var(--dark-brown);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark-brown);
}

.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark-brown);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--accent-cyan-dark) 100%);
}

.btn-success {
    background: linear-gradient(180deg, #4CAF50 0%, var(--success-green) 100%);
}

.btn-danger {
    background: linear-gradient(180deg, #FF5252 0%, var(--danger-red) 100%);
}

.btn-warning {
    background: linear-gradient(180deg, #FFC107 0%, #FFA000 100%);
    color: var(--dark-brown);
}

/* Small button variant */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-width: 3px;
    box-shadow: 3px 3px 0 var(--dark-brown);
}

.btn-sm:hover {
    box-shadow: 4px 4px 0 var(--dark-brown);
}

/* Big button variant */
.btn-big {
    font-size: 1.25rem;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: btn-glow 2s ease-in-out infinite, slide-up-fade 0.5s ease-out forwards;
    animation-delay: 0s, 0.6s;
    opacity: 0;
}

.btn-icon {
    font-size: 1.5rem;
}

@keyframes btn-glow {
    0%, 100% { box-shadow: 6px 6px 0 var(--primary-orange-dark); }
    50% { box-shadow: 6px 6px 0 var(--primary-orange-dark), 0 0 30px rgba(255, 107, 0, 0.5); }
}

/* Game Over Buttons Container */
.game-over-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.game-over-buttons .btn-big:nth-child(2) {
    animation-delay: 0s, 0.8s;
}

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

/* I8: Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}