/**
 * MODERN CSS BASE
 * Sistema CSS moderno sin dependencias
 * Reemplaza: Bootstrap + Animate.css
 */

/* ============================================
   CSS VARIABLES (Custom Properties)
   ============================================ */
:root {
    /* Colores primarios */
    --primary-color: #1977cc;
    --primary-dark: #1565b8;
    --primary-light: #2789de;
    --secondary-color: #2789de;
    
    /* Colores neutrales */
    --white: #ffffff;
    --black: #000000;
    --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;
    
    /* Spacing */
    --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 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;
    --font-mono: Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    --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 */
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 1rem;
    --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);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms 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;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

/* ============================================
   MODERN GRID SYSTEM (CSS Grid)
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.container-fluid {
    width: 100%;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

/* Grid moderno con CSS Grid */
.grid {
    display: grid;
    gap: var(--space-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-6 { grid-template-columns: repeat(6, 1fr); }
.grid-cols-12 { grid-template-columns: repeat(12, 1fr); }

/* Grid responsive automático */
.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

/* ============================================
   FLEXBOX UTILITIES
   ============================================ */
.flex { display: flex; }
.inline-flex { display: inline-flex; }

.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-row-reverse { flex-direction: row-reverse; }
.flex-col-reverse { flex-direction: column-reverse; }

.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; }
.justify-around { justify-content: space-around; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ============================================
   SPACING UTILITIES
   ============================================ */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

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

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 640px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
    
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }
    h3 { font-size: var(--text-2xl); }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
    
    .md\:flex-row { flex-direction: row; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ===========================================
   SVG ICONS
   =========================================== */

.svg-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    fill: currentColor;
}

.svg-icon-sm {
    width: 0.875em;
    height: 0.875em;
}

.svg-icon-lg {
    width: 1.5em;
    height: 1.5em;
}

.svg-icon-xl {
    width: 2em;
    height: 2em;
}

.svg-icon-2x {
    width: 2em;
    height: 2em;
}

.svg-icon-3x {
    width: 3em;
    height: 3em;
}

/* ===========================================
   UTILITY CLASSES
   =========================================== */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

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

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

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

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* ===========================================
   WHY-US CARDS - RESPONSIVE GRID & HOVER EFFECTS
   =========================================== */
/* Link wrapper sin estilos de link */
.quality-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.quality-card-link:hover {
    text-decoration: none;
}

.quality-card-link:active .quality-card {
    transform: scale(0.97);
    box-shadow: 0 5px 15px rgba(23, 119, 204, 0.2);
}

/* Efectos hover en la card */
.quality-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    will-change: transform, box-shadow;
}

.quality-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(23, 119, 204, 0.1), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
    z-index: 1;
}

.quality-card-link:hover .quality-card {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 40px rgba(23, 119, 204, 0.25);
    border-color: var(--primary-color);
}

.quality-card-link:hover .quality-card::before {
    left: 100%;
}

.quality-card-link:hover .quality-card img {
    transform: scale(1.1) rotate(5deg);
    filter: brightness(1.1);
}

.quality-card img {
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

.quality-card h4 {
    transition: color 0.3s ease;
    position: relative;
    z-index: 2;
}

.quality-card-link:hover .quality-card h4 {
    color: var(--primary-color);
}

.quality-card p {
    transition: color 0.3s ease;
    position: relative;
    z-index: 2;
}

.quality-card-link:hover .quality-card p {
    color: var(--gray-700);
}

/* Cards sin link - menos hover effect */
.quality-card:not(.quality-card-link .quality-card) {
    cursor: default;
}

.why-us .icon-boxes .grid {
    display: grid;
    gap: 1rem;
}

/* Mobile: 2 columnas */
@media (max-width: 767px) {
    .why-us .icon-boxes .grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .why-us .icon-boxes .card {
        display: flex;
        flex-direction: column;
        height: 100%;
        min-height: 200px;
        padding: 1rem;
    }
    
    .why-us .icon-boxes .card img {
        max-width: 60px !important;
        height: 60px;
        object-fit: contain;
        margin: 0 auto 0.5rem;
    }
    
    .why-us .icon-boxes .card h4 {
        font-size: 0.9rem;
        margin: 0.5rem 0;
        line-height: 1.3;
        flex-shrink: 0;
    }
    
    .why-us .icon-boxes .card p {
        font-size: 0.75rem;
        line-height: 1.4;
        margin: 0;
        flex-grow: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 4;
        -webkit-box-orient: vertical;
    }
}

/* Tablet y Desktop: 3 columnas */
@media (min-width: 768px) {
    .why-us .icon-boxes .grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .why-us .icon-boxes .card {
        display: flex;
        flex-direction: column;
        height: 100%;
        min-height: 250px;
    }
    
    .why-us .icon-boxes .card img {
        flex-shrink: 0;
    }
    
    .why-us .icon-boxes .card h4 {
        flex-shrink: 0;
    }
    
    .why-us .icon-boxes .card p {
        flex-grow: 1;
    }
}