:root {
    /* Color Palette */
    --primary-blue: #1b52a5; /* Brand Blue */
    --primary-blue-hover: #123d7a;
    --accent-color: #00a2ff; /* Celeste accent */
    --accent-hover: #0088d6;
    
    --text-main: #1e293b; /* Dark slate */
    --text-muted: #64748b;
    --text-light: #f8fafc;
    
    --bg-main: #ffffff;
    --bg-offset: #f8fafc; /* Light gray for section contrast */
    --bg-dark: #0f172a; /* Dark footer */
    
    --border-light: #e2e8f0;
    --whatsapp-green: #25d366;
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Layout */
    --header-height: 80px;
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --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-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Oculta visualmente pero deja accesible para lectores de pantalla y buscadores */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-main);
}

.text-accent {
    color: var(--accent-color);
}

.text-white {
    color: white !important;
}

/* Layout Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--bg-offset);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h1,
.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-header h1::after,
.section-header h2::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-top: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: var(--shadow-md);
}

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

.btn-outline-light {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-outline-light:hover {
    background-color: #fff;
    color: var(--primary-blue);
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 14px 32px;
    font-size: 1.1rem;
}

.card-shadow {
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    background: #fff;
    overflow: hidden;
}