/**
 * Estilos Globales
 * Optics Sterling LLC
 * 
 * ETAPA 1: Estilos base
 */

/* ============================================
   RESET Y VARIABLES
   ============================================ */
:root {
    /* Colores principales */
    --color-primary: #1a237e;
    --color-primary-dark: #0d164a;
    --color-primary-light: #2a3a9e;
    --color-secondary: #c9a84c;
    --color-secondary-light: #e8d5a0;
    --color-secondary-dark: #a8892c;
    
    /* Colores neutros */
    --color-white: #ffffff;
    --color-black: #111111;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f0f1f3;
    --color-gray-200: #e2e4e8;
    --color-gray-300: #c5c8cd;
    --color-gray-400: #a0a5ac;
    --color-gray-500: #7a8087;
    --color-gray-600: #5a6068;
    --color-gray-700: #3a4048;
    --color-gray-800: #222830;
    --color-gray-900: #111820;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Bordes y sombras */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   TIPOGRAFÍA
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-gray-900);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

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

a:hover {
    color: var(--color-secondary);
}

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

ul, ol {
    list-style: none;
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   BOTONES
   ============================================ */
.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    text-decoration: none;
}

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

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

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

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

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* ============================================
   SECCIÓN HEADER
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-gray-500);
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mt-4 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }
.mb-4 { margin-bottom: var(--spacing-2xl); }

/* ============================================
   RESPONSIVE - BASE
   ============================================ */
@media (max-width: 1200px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    .container {
        padding: 0 1rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}

/**
 * Estilos del Footer
 * Optics Sterling LLC
 */

/* ============================================
   FOOTER PRINCIPAL
   ============================================ */
.site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding-top: var(--spacing-3xl);
    border-top: 4px solid var(--color-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* ============================================
   COLUMNA 1 - LOGO Y DESCRIPCIÓN
   ============================================ */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-white);
}

.footer-logo span span {
    color: var(--color-secondary);
}

.footer-column p {
    color: var(--color-gray-400);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 300px;
    margin-bottom: var(--spacing-md);
}

/* ============================================
   REDES SOCIALES
   ============================================ */
.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
    color: var(--color-gray-400);
    font-size: 1rem;
    transition: var(--transition-normal);
    text-decoration: none;
}

.footer-social a:hover {
    background: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-3px);
}

/* ============================================
   COLUMNAS DE ENLACES
   ============================================ */
.footer-column h4 {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-secondary);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-column ul li a {
    color: var(--color-gray-400);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    text-decoration: none;
}

.footer-column ul li a:hover {
    color: var(--color-secondary);
    padding-left: 0.5rem;
}

/* ============================================
   CONTACTO
   ============================================ */
.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--color-gray-400);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.footer-contact li i {
    color: var(--color-secondary);
    font-size: 1rem;
    margin-top: 0.125rem;
    flex-shrink: 0;
    width: 18px;
}

/* ============================================
   FOOTER BOTTOM
   ============================================ */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.footer-bottom p {
    color: var(--color-gray-500);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    color: var(--color-gray-500);
    transition: var(--transition-fast);
    text-decoration: none;
}

.footer-legal a:hover {
    color: var(--color-secondary);
}

/* ============================================
   RESPONSIVE FOOTER
   ============================================ */
@media (max-width: 991px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .site-footer {
        padding-top: var(--spacing-xl);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
    
    .footer-column p {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
        padding-top: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }
    
    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .footer-logo span {
        font-size: 1.25rem;
    }
    
    .footer-social a {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }
}