/**
 * ========================================
 * ARAMED Y LABORATORIOS - CSS Principal
 * ========================================
 * 
 * Estilos principales del sitio
 * 
 * @package    Aramed
 * @author     IDEAMIA Tech
 * @copyright  2025 Aramed y Laboratorios
 */

/* ========================================
   VARIABLES CSS (Custom Properties)
   ======================================== */

:root {
    /* Colores Principales - Basados en el Logo de Aramed */
    --color-primary: #0B9FD9;        /* Azul Aramed (del logo) */
    --color-primary-dark: #0988BA;   /* Azul oscuro (hover states) */
    --color-primary-light: #3DB5E0;  /* Azul claro (highlights) */
    
    --color-secondary: #1A1A1A;      /* Negro Aramed (estetoscopio) */
    --color-secondary-dark: #000000; /* Negro profundo */
    --color-secondary-light: #343A40;/* Gris oscuro */
    
    --color-accent: #0B9FD9;         /* Mismo azul como accent */
    --color-accent-dark: #0988BA;    /* Azul oscuro */
    --color-accent-light: #66CBE9;   /* Azul muy claro */
    
    /* Colores de Estado */
    --color-success: #27AE60;
    --color-warning: #F39C12;
    --color-error: #E74C3C;
    --color-info: #3498DB;
    
    /* Escala de Grises */
    --color-white: #FFFFFF;
    --color-gray-100: #F8F9FA;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-400: #CED4DA;
    --color-gray-500: #ADB5BD;
    --color-gray-600: #6C757D;
    --color-gray-700: #495057;
    --color-gray-800: #343A40;
    --color-gray-900: #212529;
    --color-black: #000000;
    
    /* Tipografía */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Bordes */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-radius-pill: 50rem;
    --border-radius-circle: 50%;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s 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;
}

/* ========================================
   RESET Y BASE
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   TIPOGRAFÍA
   ======================================== */

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1, .h1 { font-size: 2.5rem; }
h2, .h2 { font-size: 2rem; }
h3, .h3 { font-size: 1.75rem; }
h4, .h4 { font-size: 1.5rem; }
h5, .h5 { font-size: 1.25rem; }
h6, .h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

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

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

strong, b {
    font-weight: var(--font-weight-bold);
}

em, i {
    font-style: italic;
}

/* ========================================
   UTILIDADES
   ======================================== */

.container-fluid {
    max-width: 100%;
}

.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-accent { color: var(--color-accent) !important; }

.bg-primary { background-color: var(--color-primary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.bg-accent { background-color: var(--color-accent) !important; }

.fw-light { font-weight: var(--font-weight-light) !important; }
.fw-normal { font-weight: var(--font-weight-normal) !important; }
.fw-medium { font-weight: var(--font-weight-medium) !important; }
.fw-semibold { font-weight: var(--font-weight-semibold) !important; }
.fw-bold { font-weight: var(--font-weight-bold) !important; }
.fw-extrabold { font-weight: var(--font-weight-extrabold) !important; }

/* ========================================
   BOTONES
   ======================================== */

.btn {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-md);
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
}

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

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

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

/* ========================================
   SECCIONES
   ======================================== */

section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   CARDS
   ======================================== */

.card {
    border-radius: var(--border-radius-lg);
    border: none;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-img-top {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.card-body {
    padding: var(--spacing-xl);
}

.card-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.card-text {
    color: var(--color-gray-600);
}

/* ========================================
   FORMULARIOS
   ======================================== */

.form-control,
.form-select {
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-gray-300);
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
    outline: none;
}

.form-label {
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.invalid-feedback {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.valid-feedback {
    color: var(--color-success);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ========================================
   ANIMACIONES
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-slow);
}

.fade-in-up {
    animation: fadeInUp var(--transition-slow);
}

/* ========================================
   LOADING SPINNER
   ======================================== */

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: var(--border-radius-circle);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   SCROLLBAR PERSONALIZADA
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--border-radius-pill);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* ========================================
   SELECCIÓN DE TEXTO
   ======================================== */

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

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* ========================================
   LAZY LOADING PLACEHOLDER
   ======================================== */

img[data-src] {
    filter: blur(5px);
    transition: filter var(--transition-base);
}

img[data-src].loaded {
    filter: blur(0);
}

/* ========================================
   ACCESIBILIDAD
   ======================================== */

.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;
}

.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}

/* Focus visible para navegación por teclado */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}