/**
 * Main Stylesheet - Scratch & Guess Animals
 * Dark theme with orange accents
 */

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-primary: #FF6B00;
    --color-primary-light: #FF8C00;
    --color-primary-dark: #E55A00;
    --color-accent: #FFD700;
    --color-background: #1a1a2e;
    --color-surface: #16213e;
    --color-surface-light: #0f3460;
    --color-surface-lighter: #1a4075;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #6a6a8a;
    --color-success: #4CAF50;
    --color-success-dark: #388E3C;
    --color-warning: #FFC107;
    --color-error: #f44336;
    --color-overlay: #4A4A4A;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-surface: linear-gradient(180deg, var(--color-surface) 0%, var(--color-background) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 107, 0, 0.3);

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --font-size-huge: 48px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Z-indices */
    --z-base: 1;
    --z-overlay: 100;
    --z-modal: 200;
    --z-toast: 300;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    color: var(--color-text);
    background: var(--color-background);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#screen-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: var(--font-size-huge); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

/* Links */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--color-text);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

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

.btn--secondary {
    background: var(--color-surface-light);
}

.btn--icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: var(--radius-full);
}

.btn--large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
    border-radius: var(--radius-lg);
}

/* Cards */
.card {
    background: var(--gradient-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.card--elevated {
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
}

/* Glassmorphism */
.glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass--dark {
    background: rgba(0, 0, 0, 0.3);
}

/* Inputs */
.input {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-surface-light);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

.input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.2);
}

.input::placeholder {
    color: var(--color-text-muted);
}

/* Screen Layouts */
.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.screen--center {
    justify-content: center;
    align-items: center;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.w-full { width: 100%; }
.h-full { height: 100%; }

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

.m-auto { margin: auto; }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.invisible { visibility: hidden; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

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

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-fadeIn { animation: fadeIn var(--transition-normal) ease forwards; }
.animate-slideUp { animation: slideUp var(--transition-normal) ease forwards; }
.animate-slideDown { animation: slideDown var(--transition-normal) ease forwards; }
.animate-scaleIn { animation: scaleIn var(--transition-normal) ease forwards; }
.animate-pulse { animation: pulse 2s infinite; }
.animate-shake { animation: shake 0.5s ease; }
.animate-bounce { animation: bounce 1s infinite; }

/* Point colors */
.points--high { color: var(--color-success); }
.points--medium { color: var(--color-primary); }
.points--low { color: var(--color-warning); }
.points--critical { color: var(--color-error); }

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-surface);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface-light);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-surface-lighter);
}

/* Selection */
::selection {
    background: var(--color-primary);
    color: var(--color-text);
}

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

/* Prevent text selection during scratching */
.no-select {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Touch action for scratch canvas */
.touch-none {
    touch-action: none;
}