/* ============================================
   AVD - Asociación por una Vida Digna
   Estilos principales
   ============================================ */

/* ============================================
   Variables CSS - Colores Corporativos
   ============================================ */
:root {
    /* Colores principales del logo */
    --color-azul-marino: #1a3a52;
    --color-verde-lima: #a4c639;
    --color-azul-claro: #00bcd4;
    
    /* Colores complementarios */
    --color-blanco: #ffffff;
    --color-gris-claro: #f5f5f5;
    --color-gris-medio: #e0e0e0;
    --color-gris-oscuro: #333333;
    --color-texto: #444444;
    
    /* Sombras */
    --sombra-suave: 0 2px 10px rgba(0, 0, 0, 0.1);
    --sombra-media: 0 4px 20px rgba(0, 0, 0, 0.15);
    --sombra-fuerte: 0 8px 30px rgba(0, 0, 0, 0.2);
    
    /* Espaciado */
    --espaciado-xs: 0.5rem;
    --espaciado-sm: 1rem;
    --espaciado-md: 2rem;
    --espaciado-lg: 3rem;
    --espaciado-xl: 4rem;
    
    /* Fuentes */
    --fuente-principal: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --fuente-titulo: 'Inter', sans-serif;
}

/* ============================================
   Reset y Estilos Globales
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--fuente-principal);
    color: var(--color-texto);
    line-height: 1.6;
    background-color: var(--color-blanco);
    overflow-x: hidden;
}

/* ============================================
   Tipografía
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--fuente-titulo);
    font-weight: 700;
    color: var(--color-azul-marino);
    line-height: 1.2;
    margin-bottom: var(--espaciado-sm);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--espaciado-md);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--espaciado-md);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--espaciado-sm);
    line-height: 1.8;
}

a {
    color: var(--color-azul-claro);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-verde-lima);
}

/* ============================================
   Header y Navegación
   ============================================ */
.header {
    background-color: var(--color-blanco);
    box-shadow: var(--sombra-suave);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--sombra-media);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-azul-marino);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-avd {
    font-size: 1.8rem;
    color: var(--color-azul-marino);
}

.logo-subtitle {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--color-verde-lima);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--color-azul-marino);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-verde-lima);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-verde-lima);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-azul-marino);
    margin: 5px 0;
    transition: 0.3s;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-azul-marino) 0%, #2c5a7a 100%);
    color: var(--color-blanco);
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: var(--color-blanco);
    font-size: 3rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.hero-highlight {
    color: var(--color-verde-lima);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero .tagline {
    font-size: 1.1rem;
    font-style: italic;
    margin-top: 1rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.4s both;
}

/* ============================================
   Botones
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-verde-lima);
    color: var(--color-blanco);
    box-shadow: 0 4px 15px rgba(164, 198, 57, 0.3);
}

.btn-primary:hover {
    background-color: #93b330;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(164, 198, 57, 0.4);
}

.btn-secondary {
    background-color: var(--color-azul-claro);
    color: var(--color-blanco);
    box-shadow: 0 4px 15px rgba(0, 188, 212, 0.3);
}

.btn-secondary:hover {
    background-color: #00a5bb;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 188, 212, 0.4);
}

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

.btn-outline:hover {
    background-color: var(--color-blanco);
    color: var(--color-azul-marino);
}

/* ============================================
   Secciones
   ============================================ */
.section {
    padding: 5rem 2rem;
}

.section-light {
    background-color: var(--color-blanco);
}

.section-gray {
    background-color: var(--color-gris-claro);
}

.section-primary {
    background-color: var(--color-azul-marino);
    color: var(--color-blanco);
}

.section-primary h2,
.section-primary h3 {
    color: var(--color-blanco);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-verde-lima), var(--color-azul-claro));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--color-texto);
    max-width: 700px;
    margin: 1.5rem auto 0;
    line-height: 1.8;
}

.section-primary .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   Grid de Cards
   ============================================ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background-color: var(--color-blanco);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--sombra-suave);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--color-verde-lima), var(--color-azul-claro));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--sombra-fuerte);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-verde-lima), var(--color-azul-claro));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--color-blanco);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-azul-marino);
}

.card-text {
    color: var(--color-texto);
    line-height: 1.8;
}

/* ============================================
   Estadísticas
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background-color: var(--color-blanco);
    border-radius: 15px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--sombra-suave);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-verde-lima);
    box-shadow: var(--sombra-media);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-verde-lima), var(--color-azul-claro));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-azul-marino);
    margin-bottom: 0.5rem;
    display: block;
}

.stat-label {
    font-size: 1rem;
    color: var(--color-texto);
    font-weight: 500;
}

/* ============================================
   Programas
   ============================================ */
.programa {
    margin-bottom: 4rem;
    background-color: var(--color-blanco);
    border-radius: 15px;
    padding: 3rem;
    box-shadow: var(--sombra-suave);
}

.programa-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.programa-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-verde-lima), var(--color-azul-claro));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--color-blanco);
    flex-shrink: 0;
}

.programa-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.programa-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.programa-resultados {
    background-color: var(--color-gris-claro);
    border-radius: 10px;
    padding: 2rem;
}

.programa-resultados h4 {
    color: var(--color-azul-marino);
    margin-bottom: 1rem;
}

.programa-resultados ul {
    list-style: none;
    padding: 0;
}

.programa-resultados li {
    padding: 0.7rem 0 0.7rem 2rem;
    position: relative;
    line-height: 1.8;
}

.programa-resultados li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-verde-lima);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ============================================
   Timeline
   ============================================ */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-verde-lima), var(--color-azul-claro));
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-content {
    background-color: var(--color-blanco);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--sombra-suave);
    width: 45%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-azul-marino);
    color: var(--color-blanco);
    padding: 3rem 2rem 1.5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--color-verde-lima);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--color-verde-lima);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.7rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--color-verde-lima);
    transform: translateY(-3px);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   Formulario
   ============================================ */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-azul-marino);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border: 2px solid var(--color-gris-medio);
    border-radius: 8px;
    font-family: var(--fuente-principal);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-verde-lima);
    box-shadow: 0 0 0 3px rgba(164, 198, 57, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

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

.fade-in-up {
    animation: fadeInUp 0.8s ease both;
}

.fade-in-up-delay-1 {
    animation: fadeInUp 0.8s ease 0.2s both;
}

.fade-in-up-delay-2 {
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* ============================================
   Utilidades
   ============================================ */
.text-center {
    text-align: center;
}

.text-green {
    color: var(--color-verde-lima);
}

.text-blue {
    color: var(--color-azul-claro);
}

.mt-1 { margin-top: var(--espaciado-sm); }
.mt-2 { margin-top: var(--espaciado-md); }
.mt-3 { margin-top: var(--espaciado-lg); }

.mb-1 { margin-bottom: var(--espaciado-sm); }
.mb-2 { margin-bottom: var(--espaciado-md); }
.mb-3 { margin-bottom: var(--espaciado-lg); }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--color-blanco);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--sombra-media);
        padding: 2rem 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 80px !important;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .section {
        padding: 3rem 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cards-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .programa {
        padding: 2rem 1.5rem;
    }
    
    .programa-header {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }
    
    .hero {
        padding: 4rem 1.5rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}