/**
 * Design System Variables & Core Styles
 * 
 * Professional design foundation for Sports Membership plugin
 */

:root {
    /* === Color System === */
    /* Primary Brand Colors */
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-900: #1e3a8a;
    
    /* Success Colors */
    --color-success: #10b981;
    --color-success-light: #34d399;
    --color-success-dark: #059669;
    --color-success-50: #ecfdf5;
    --color-success-100: #d1fae5;
    --color-success-600: #10b981;
    --color-success-700: #059669;
    
    /* Warning Colors */
    --color-warning: #f59e0b;
    --color-warning-light: #fbbf24;
    --color-warning-dark: #d97706;
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-600: #f59e0b;
    --color-warning-700: #d97706;
    
    /* Error Colors */
    --color-error: #ef4444;
    --color-error-light: #f87171;
    --color-error-dark: #dc2626;
    --color-error-50: #fef2f2;
    --color-error-100: #fee2e2;
    --color-error-600: #ef4444;
    --color-error-700: #dc2626;
    
    /* Neutral Colors */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Background Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    
    /* Text Colors */
    --color-text-primary: #111827;
    --color-text-secondary: #4b5563;
    --color-text-tertiary: #6b7280;
    --color-text-inverted: #ffffff;
    
    /* Border Colors */
    --color-border-light: #e5e7eb;
    --color-border-medium: #d1d5db;
    --color-border-dark: #9ca3af;
    
    /* === Typography === */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    
    /* Font Sizes */
    --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-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* === Spacing === */
    --spacing-0: 0;
    --spacing-1: 0.25rem;    /* 4px */
    --spacing-2: 0.5rem;     /* 8px */
    --spacing-3: 0.75rem;    /* 12px */
    --spacing-4: 1rem;       /* 16px */
    --spacing-5: 1.25rem;    /* 20px */
    --spacing-6: 1.5rem;     /* 24px */
    --spacing-8: 2rem;       /* 32px */
    --spacing-10: 2.5rem;    /* 40px */
    --spacing-12: 3rem;      /* 48px */
    --spacing-16: 4rem;      /* 64px */
    --spacing-20: 5rem;      /* 80px */
    --spacing-24: 6rem;      /* 96px */
    
    /* === Border Radius === */
    --radius-sm: 0.25rem;    /* 4px */
    --radius-base: 0.375rem; /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* === 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-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px 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-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    
    /* === Transitions === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* === Z-Index === */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* === Breakpoints (for JS) === */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

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

/* === Base Typography === */
body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
}

h1 { font-size: var(--text-4xl); margin-bottom: var(--spacing-6); }
h2 { font-size: var(--text-3xl); margin-bottom: var(--spacing-5); }
h3 { font-size: var(--text-2xl); margin-bottom: var(--spacing-4); }
h4 { font-size: var(--text-xl); margin-bottom: var(--spacing-3); }
h5 { font-size: var(--text-lg); margin-bottom: var(--spacing-3); }
h6 { font-size: var(--text-base); margin-bottom: var(--spacing-2); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

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

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

/* === Utility Classes === */
.sports-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.sports-section {
    padding: var(--spacing-16) 0;
}

.sports-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-6);
}

/* === Button System === */
.sports-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-family: var(--font-sans);
    font-weight: var(--font-semibold);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-6);
    transition: all var(--transition-base);
    user-select: none;
}

.sports-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.sports-btn svg {
    width: 20px;
    height: 20px;
}

/* Button Variants */
.sports-btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverted);
}

.sports-btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.sports-btn-success {
    background: var(--color-success);
    color: var(--color-text-inverted);
}

.sports-btn-success:hover:not(:disabled) {
    background: var(--color-success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.sports-btn-warning {
    background: var(--color-warning);
    color: var(--color-text-inverted);
}

.sports-btn-warning:hover:not(:disabled) {
    background: var(--color-warning-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.sports-btn-error {
    background: var(--color-error);
    color: var(--color-text-inverted);
}

.sports-btn-error:hover:not(:disabled) {
    background: var(--color-error-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.sports-btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-text-primary);
    border-color: var(--color-border-medium);
}

.sports-btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-200);
    border-color: var(--color-border-dark);
}

.sports-btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.sports-btn-outline:hover:not(:disabled) {
    background: var(--color-primary-50);
}

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

.sports-btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
    color: var(--color-text-primary);
}

/* Button Sizes */
.sports-btn-sm {
    font-size: var(--text-sm);
    padding: var(--spacing-2) var(--spacing-4);
}

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

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

.sports-btn-icon {
    padding: var(--spacing-3);
    aspect-ratio: 1;
}

.sports-btn-full {
    width: 100%;
}

/* === Form Elements === */
.sports-form-group {
    margin-bottom: var(--spacing-6);
}

.sports-label {
    display: block;
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.sports-label-required::after {
    content: '*';
    color: var(--color-error);
    margin-left: var(--spacing-1);
}

.sports-input,
.sports-select,
.sports-textarea {
    width: 100%;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-4);
    transition: all var(--transition-base);
}

.sports-input:focus,
.sports-select:focus,
.sports-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

.sports-input:disabled,
.sports-select:disabled,
.sports-textarea:disabled {
    background: var(--color-gray-100);
    cursor: not-allowed;
    opacity: 0.6;
}

.sports-input.error,
.sports-select.error,
.sports-textarea.error {
    border-color: var(--color-error);
}

.sports-input.error:focus,
.sports-select.error:focus,
.sports-textarea.error:focus {
    box-shadow: 0 0 0 3px var(--color-error-100);
}

.sports-textarea {
    min-height: 120px;
    resize: vertical;
}

.sports-input-icon-wrapper {
    position: relative;
}

.sports-input-icon {
    position: absolute;
    left: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.sports-input-icon + .sports-input {
    padding-left: var(--spacing-10);
}

.sports-input-hint {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-2);
}

.sports-input-error {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--text-sm);
    color: var(--color-error);
    margin-top: var(--spacing-2);
}

.sports-input-error svg {
    width: 16px;
    height: 16px;
}

/* Checkbox & Radio */
.sports-checkbox,
.sports-radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
}

.sports-checkbox input[type="checkbox"],
.sports-radio input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    border-radius: var(--radius-sm);
}

.sports-radio input[type="radio"] {
    border-radius: var(--radius-full);
}

/* === Badge System === */
.sports-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.sports-badge svg {
    width: 14px;
    height: 14px;
}

.sports-badge-primary {
    background: var(--color-primary-100);
    color: var(--color-primary-700);
}

.sports-badge-success {
    background: var(--color-success-100);
    color: var(--color-success-700);
}

.sports-badge-warning {
    background: var(--color-warning-100);
    color: var(--color-warning-700);
}

.sports-badge-error {
    background: var(--color-error-100);
    color: var(--color-error-700);
}

.sports-badge-gray {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

/* === Alert System === */
.sports-alert {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--spacing-4);
}

.sports-alert-icon {
    flex-shrink: 0;
}

.sports-alert-icon svg {
    width: 20px;
    height: 20px;
}

.sports-alert-content {
    flex: 1;
}

.sports-alert-title {
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-1);
}

.sports-alert-message {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.sports-alert-success {
    background: var(--color-success-50);
    border-color: var(--color-success);
    color: var(--color-success-700);
}

.sports-alert-warning {
    background: var(--color-warning-50);
    border-color: var(--color-warning);
    color: var(--color-warning-700);
}

.sports-alert-error {
    background: var(--color-error-50);
    border-color: var(--color-error);
    color: var(--color-error-700);
}

.sports-alert-info {
    background: var(--color-primary-50);
    border-color: var(--color-primary);
    color: var(--color-primary-700);
}

/* === Loading Spinner === */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.sports-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

.sports-spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* === Responsive Utilities === */
@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }
    
    .sports-btn {
        font-size: var(--text-sm);
        padding: var(--spacing-2) var(--spacing-4);
    }
    
    .sports-btn-lg {
        font-size: var(--text-base);
        padding: var(--spacing-3) var(--spacing-6);
    }
}