/**
 * Hub Terapeutico Design System
 * 
 * Core design tokens and utilities for the Hub Terapeutico plugin.
 * Extracted from front-page.php patterns.
 *
 * @package Hub_Terapeutico
 * @version 1.0.0
 */

:root {
    /* === Colors === */
    
    /* Primary Brand Colors (Teal) */
    --color-primary: #0d959c;           /* Main teal */
    --color-primary-dark: #087f85;      /* Darker teal */
    --color-primary-light: #0ab3ba;     /* Lighter teal */
    --color-primary-50: #f0fdfa;        /* Very light teal background */
    --color-primary-100: #ccfbf1;       /* Light teal background */
    --color-primary-700: #0f766e;       /* Dark teal for text */
    
    /* Neutral Grays (Tailwind-inspired) */
    --color-gray-50: #f9fafb;           /* Lightest gray */
    --color-gray-100: #f3f4f6;          /* Very light gray */
    --color-gray-200: #e5e7eb;          /* Light gray border */
    --color-gray-300: #d1d5db;          /* Gray border */
    --color-gray-400: #9ca3af;          /* Medium gray */
    --color-gray-500: #6b7280;          /* Dark gray text */
    --color-gray-600: #4b5563;          /* Darker gray text */
    --color-gray-700: #374151;          /* Very dark gray */
    --color-gray-800: #1f2937;          /* Almost black */
    --color-gray-900: #111827;          /* Black headings */
    
    /* Semantic Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-error: #ef4444;             /* Red for errors */
    --color-success: #10b981;           /* Green for success */
    --color-warning: #f59e0b;           /* Amber for warnings */
    --color-info: var(--color-primary); /* Teal for info */

    /* === Extended Transparencies === */
    --shadow-xs: rgba(0, 0, 0, 0.04);

    /* === Primary Transparencies === */
    --color-primary-transparent-10: rgba(13, 149, 156, 0.1);
    --color-primary-transparent-12: rgba(10, 179, 186, 0.12);
    --color-primary-transparent-15: rgba(13, 149, 156, 0.15);
    --color-primary-transparent-20: rgba(13, 149, 156, 0.2);
    --color-primary-transparent-25: rgba(13, 149, 156, 0.25);
    --color-primary-transparent-30: rgba(13, 149, 156, 0.3);

    /* === White Transparencies === */
    --color-white-90: rgba(255, 255, 255, 0.9);
    --color-white-85: rgba(255, 255, 255, 0.85);
    --color-white-30: rgba(255, 255, 255, 0.3);
    --color-white-20: rgba(255, 255, 255, 0.2);
    --color-white-15: rgba(255, 255, 255, 0.15);

    /* === Gradients === */
    --gradient-primary: linear-gradient(45deg, #0ab3ba 0%, #0d959c 100%);
    --gradient-hero: linear-gradient(135deg, #087f85 0%, #0d959c 100%);
    --gradient-cta: linear-gradient(145deg, #0d959c 0%, #087f85 100%);
    --gradient-subtle: linear-gradient(145deg, rgba(13, 149, 156, 0.08) 0%, rgba(10, 179, 186, 0.12) 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-success-bar: linear-gradient(90deg, #6ee7b7 0%, #059669 100%);
    --gradient-error-bar: linear-gradient(90deg, #fca5a5 0%, #ef4444 100%);

    /* === Extended Error Colors === */
    --color-error-light: #fef2f2;
    --color-error-border: #fecaca;
    --color-error-text-dark: #991b1b;
    --color-error-bg: #fee2e2;

    /* === Extended Success Colors === */
    --color-success-light: #6ee7b7;
    --color-success-dark: #059669;
    --color-success-darker: #047857;
    --color-success-text-dark: #166534;
    --color-success-bg: #dcfce7;

    /* === Warning Colors === */
    --color-warning-bg: #fef3c7;
    --color-warning-text: #92400e;
    
    /* === Typography === */
    
    /* Font Families */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-family-heading: var(--font-family-base);
    
    /* Font Sizes */
    --font-size-xs: 12px;               /* Extra small */
    --font-size-sm: 14px;               /* Small */
    --font-size-base: 16px;             /* Body text */
    --font-size-lg: 18px;               /* Large text */
    --font-size-xl: 20px;               /* Extra large */
    --font-size-2xl: 24px;              /* 2X large */
    --font-size-3xl: 30px;              /* 3X large */
    --font-size-4xl: 36px;              /* 4X large */
    --font-size-5xl: 42px;              /* 5X large */
    --font-size-6xl: 56px;              /* 6X large (hero) */
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Line Heights */
    --line-height-tight: 1.15;          /* Headings */
    --line-height-snug: 1.3;            /* Subheadings */
    --line-height-normal: 1.5;          /* Body text */
    --line-height-relaxed: 1.6;         /* Comfortable reading */
    --line-height-loose: 1.7;           /* Very relaxed */
    
    /* Letter Spacing */
    --letter-spacing-tight: -0.04em;    /* Tight for large headings */
    --letter-spacing-normal: 0;         /* Default */
    --letter-spacing-wide: 0.025em;     /* Slightly wide */
    --letter-spacing-wider: 0.05em;     /* Wide */
    --letter-spacing-widest: 0.15em;    /* Very wide (uppercase) */
    
    /* === Spacing Scale === */
    /* Primary numeric scale (recommended) */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-7: 28px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    --spacing-14: 56px;
    --spacing-16: 64px;
    --spacing-20: 80px;

    /* Semantic aliases for theme/legacy compatibility */
    --spacing-xs: var(--spacing-2);    /* 8px */
    --spacing-sm: var(--spacing-3);    /* 12px */
    --spacing-md: var(--spacing-4);    /* 16px */
    --spacing-lg: var(--spacing-6);    /* 24px */
    --spacing-xl: var(--spacing-8);    /* 32px */
    --spacing-2xl: var(--spacing-12);  /* 48px */
    --spacing-3xl: var(--spacing-16);  /* 64px */
    
    /* === Border Radius === */
    --radius-sm: 6px;
    --radius-base: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;              /* Pills/circles */
    
    /* === Shadows === */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-button: 0 4px 15px rgba(0, 0, 0, 0.15);
    --shadow-button-hover: 0 8px 25px rgba(0, 0, 0, 0.2);
    
    /* === Transitions === */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-all: all 300ms ease;
    
    /* === Z-Index === */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* === Container Widths === */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* === Global Utilities === */

.hub-container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

.hub-container--sm {
    max-width: var(--container-sm);
}

.hub-container--md {
    max-width: var(--container-md);
}

.hub-container--lg {
    max-width: var(--container-lg);
}

.hub-container--xl {
    max-width: var(--container-xl);
}

.hub-container--2xl {
    max-width: var(--container-2xl);
}

/* === Section Utilities === */

.hub-section {
    padding: var(--spacing-20) 0;
}

.hub-section--sm {
    padding: var(--spacing-12) 0;
}

.hub-section--lg {
    padding: 120px 0;
}

.hub-section--hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
}

/* === Background Utilities === */

.hub-bg-primary {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
}

.hub-bg-white {
    background-color: var(--color-white);
}

.hub-bg-gray-50 {
    background-color: var(--color-gray-50);
}

.hub-bg-gray-100 {
    background-color: var(--color-gray-100);
}

/* === Text Utilities === */

.hub-text-primary {
    color: var(--color-primary);
}

.hub-text-gray-500 {
    color: var(--color-gray-500);
}

.hub-text-gray-700 {
    color: var(--color-gray-700);
}

.hub-text-gray-900 {
    color: var(--color-gray-900);
}

.hub-text-center {
    text-align: center;
}

.hub-text-left {
    text-align: left;
}

.hub-text-right {
    text-align: right;
}

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

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 42px;
        --font-size-5xl: 36px;
        --font-size-4xl: 30px;
        --font-size-3xl: 24px;
    }
    
    .hub-section {
        padding: var(--spacing-12) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-6xl: 36px;
        --font-size-5xl: 30px;
        --font-size-4xl: 24px;
    }
    
    .hub-container {
        padding-left: var(--spacing-3);
        padding-right: var(--spacing-3);
    }
}

/* === Accessibility Utilities === */

.hub-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

.hub-skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-2) var(--spacing-4);
    text-decoration: none;
    z-index: var(--z-tooltip);
}

.hub-skip-link:focus {
    top: 0;
}

/* === Grid Utilities === */

.hub-grid {
    display: grid;
    gap: var(--spacing-8);
}

.hub-grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.hub-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.hub-grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .hub-grid--3,
    .hub-grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .hub-grid--2,
    .hub-grid--3,
    .hub-grid--4 {
        grid-template-columns: 1fr;
    }
}

/* === Flex Utilities === */

.hub-flex {
    display: flex;
}

.hub-flex--center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hub-flex--between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hub-flex--column {
    display: flex;
    flex-direction: column;
}

.hub-flex--wrap {
    flex-wrap: wrap;
}

.hub-gap-2 { gap: var(--spacing-2); }
.hub-gap-3 { gap: var(--spacing-3); }
.hub-gap-4 { gap: var(--spacing-4); }
.hub-gap-6 { gap: var(--spacing-6); }
.hub-gap-8 { gap: var(--spacing-8); }

/* === Select Component === */

.hub-select {
    display: block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    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 8l4 4 4-4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--spacing-3) center;
    background-size: 1.25rem 1.25rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    appearance: none;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.hub-select:hover {
    border-color: var(--color-gray-400);
}

.hub-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-transparent-20);
}

.hub-select--error {
    border-color: var(--color-error);
}

.hub-select--error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* === Checkbox Component === */

.hub-form-field--checkbox {
    margin-top: var(--spacing-2);
}

.hub-checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    cursor: pointer;
    padding: var(--spacing-4);
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all 0.15s ease;
}

.hub-checkbox-wrapper:hover {
    background: var(--color-white);
    border-color: var(--color-primary);
}

.hub-checkbox {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.hub-checkbox__label {
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    line-height: 1.5;
}

.hub-checkbox:checked + .hub-checkbox__checkmark + .hub-checkbox__label {
    color: var(--color-gray-900);
    font-weight: 500;
}

.hub-checkbox--error {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}