/*
 * LowCard Game Design System
 * Modern, consistent UI components and utilities
 */

/* ================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ================================ */

:root {
    /* Brand Colors */
    --primary: #667eea;
    --primary-hover: #764ba2;
    --primary-light: rgba(102, 126, 234, 0.1);
    --primary-dark: #5a67d8;
    
    /* Semantic Colors */
    --success: #4ade80;
    --success-light: rgba(74, 222, 128, 0.1);
    --warning: #fbbf24;
    --warning-light: rgba(251, 191, 36, 0.1);
    --danger: #f87171;
    --danger-light: rgba(248, 113, 113, 0.1);
    --info: #60a5fa;
    --info-light: rgba(96, 165, 250, 0.1);
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Dark Theme Colors */
    --dark-bg-primary: #1a1a2e;
    --dark-bg-secondary: #16213e;
    --dark-bg-tertiary: #0f3460;
    --dark-text-primary: #ffffff;
    --dark-text-secondary: rgba(255, 255, 255, 0.7);
    --dark-text-muted: rgba(255, 255, 255, 0.5);
    --dark-border: rgba(255, 255, 255, 0.1);
    --dark-border-light: rgba(255, 255, 255, 0.05);
    
    /* Spacing Scale */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    
    /* Typography Scale */
    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    --text-5xl: 3rem;       /* 48px */
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius: 0.5rem;       /* 8px */
    --radius-md: 0.75rem;   /* 12px */
    --radius-lg: 1rem;      /* 16px */
    --radius-xl: 1.25rem;   /* 20px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-dark: 0 4px 20px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
    
    /* Layout */
    --header-height: 70px;
    --sidebar-width: 280px;
    --sidebar-collapsed: 70px;
    --container-max-width: 1400px;
}

/* ================================
   RESET & BASE STYLES
   ================================ */

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--dark-text-primary);
    background: linear-gradient(135deg, var(--dark-bg-primary) 0%, var(--dark-bg-secondary) 50%, var(--dark-bg-tertiary) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ================================
   TYPOGRAPHY SYSTEM
   ================================ */

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.font-extrabold { font-weight: var(--font-extrabold); }

.text-primary { color: var(--dark-text-primary); }
.text-secondary { color: var(--dark-text-secondary); }
.text-muted { color: var(--dark-text-muted); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }

/* ================================
   BUTTON SYSTEM
   ================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Variants */
.btn-primary {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    color: var(--dark-text-primary);
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.btn-secondary:hover {
    background: var(--dark-bg-tertiary);
    border-color: var(--primary);
}

.btn-ghost {
    color: var(--dark-text-secondary);
    background: transparent;
    border-color: var(--dark-border);
}

.btn-ghost:hover {
    color: var(--dark-text-primary);
    background: var(--primary-light);
    border-color: var(--primary);
}

.btn-success {
    color: var(--white);
    background: var(--success);
}

.btn-warning {
    color: var(--gray-900);
    background: var(--warning);
}

.btn-danger {
    color: var(--white);
    background: var(--danger);
}

.btn-info {
    color: var(--white);
    background: var(--info);
}

/* Button Sizes */
.btn-xs {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

.btn-xl {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-xl);
}

/* ================================
   CARD SYSTEM
   ================================ */

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-dark);
    transition: var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2xl);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--dark-border);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--dark-border);
    background: rgba(255, 255, 255, 0.02);
}

/* ================================
   FORM SYSTEM
   ================================ */

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--dark-text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--dark-text-primary);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
    background: rgba(255, 255, 255, 0.15);
}

.form-control::placeholder {
    color: var(--dark-text-muted);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 16px 12px;
    padding-right: var(--space-10);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin: 0;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.form-check-input:checked {
    background: var(--primary);
    border-color: var(--primary);
}

/* ================================
   BADGE SYSTEM
   ================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    line-height: 1;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }

/* ================================
   ALERT SYSTEM
   ================================ */

.alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    margin-bottom: var(--space-6);
}

.alert-success {
    background: var(--success-light);
    border-color: var(--success);
    color: var(--success);
}

.alert-warning {
    background: var(--warning-light);
    border-color: var(--warning);
    color: var(--warning);
}

.alert-danger {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    background: var(--info-light);
    border-color: var(--info);
    color: var(--info);
}

/* ================================
   TABLE SYSTEM
   ================================ */

.table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table th,
.table td {
    padding: var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--dark-border);
}

.table th {
    background: rgba(255, 255, 255, 0.1);
    font-weight: var(--font-semibold);
    color: var(--dark-text-primary);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* ================================
   LAYOUT UTILITIES
   ================================ */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }

/* ================================
   SPACING UTILITIES
   ================================ */

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* ================================
   RESPONSIVE UTILITIES
   ================================ */

@media (max-width: 640px) {
    .sm\:hidden { display: none; }
    .sm\:block { display: block; }
    .sm\:flex { display: flex; }
    .sm\:text-sm { font-size: var(--text-sm); }
    .sm\:p-4 { padding: var(--space-4); }
}

@media (max-width: 768px) {
    .md\:hidden { display: none; }
    .md\:block { display: block; }
    .md\:flex { display: flex; }
    .md\:text-base { font-size: var(--text-base); }
    .md\:p-6 { padding: var(--space-6); }
}

@media (max-width: 1024px) {
    .lg\:hidden { display: none; }
    .lg\:block { display: block; }
    .lg\:flex { display: flex; }
}

/* ================================
   ANIMATION UTILITIES
   ================================ */

.transition { transition: var(--transition-base); }
.transition-fast { transition: var(--transition-fast); }
.transition-slow { transition: var(--transition-slow); }

.hover\:scale-105:hover { transform: scale(1.05); }
.hover\:scale-110:hover { transform: scale(1.1); }
.hover\:-translate-y-1:hover { transform: translateY(-0.25rem); }
.hover\:-translate-y-2:hover { transform: translateY(-0.5rem); }

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-bounce {
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(-25%);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
        transform: none;
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

/* ================================
   ACCESSIBILITY
   ================================ */

.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;
}

.focus\:outline-none:focus {
    outline: none;
}

.focus\:ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* ================================
   DARK MODE OVERRIDES
   ================================ */

@media (prefers-color-scheme: dark) {
    /* Already using dark theme by default */
}

/* ================================
   HIGH CONTRAST MODE
   ================================ */

@media (prefers-contrast: high) {
    :root {
        --dark-border: rgba(255, 255, 255, 0.3);
        --dark-text-secondary: rgba(255, 255, 255, 0.9);
    }
}

/* ================================
   REDUCED MOTION
   ================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ================================
   PRINT STYLES
   ================================ */

@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .no-print {
        display: none !important;
    }
}

/* ================================
   COMPONENT SPECIFIC OVERRIDES
   ================================ */

/* Navigation specific styles are in navigation.php */
/* Admin navigation specific styles are in admin/includes/navigation.php */

/* Global page styles */
.page-header {
    padding: var(--space-8) 0;
    text-align: center;
}

.page-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--dark-text-primary);
    margin-bottom: var(--space-4);
}

.page-subtitle {
    font-size: var(--text-lg);
    color: var(--dark-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

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

::-webkit-scrollbar-track {
    background: var(--dark-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-border);
    border-radius: var(--radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-text-muted);
}

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

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

/* Custom properties for JavaScript interaction */
.js-focus {
    --focus-color: var(--primary);
}

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

/* Utility for glassmorphism effect */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Utility for gradient text */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Utility for glow effects */
.glow {
    box-shadow: 0 0 20px var(--primary-light);
}

.glow-hover:hover {
    box-shadow: 0 0 30px var(--primary-light);
}

/* Modern floating labels */
.floating-label {
    position: relative;
}

.floating-label input:focus + label,
.floating-label input:not(:placeholder-shown) + label {
    transform: translateY(-1.5rem) scale(0.875);
    color: var(--primary);
}

.floating-label label {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    color: var(--dark-text-muted);
    transition: var(--transition-base);
    pointer-events: none;
    transform-origin: 0 0;
}

/* Modern toggle switches */
.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gray-600);
    transition: var(--transition-base);
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

/* Modern progress bars */
.progress {
    width: 100%;
    height: 8px;
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-hover));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

/* Modern tooltips */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    font-size: var(--text-xs);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-base);
    z-index: var(--z-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
}

/* ================================
   END OF DESIGN SYSTEM
   ================================ */