/* Estilos generales y layouts de la Fundación Vitra */
/* Variables globales de diseño e identidad de la Fundación Vitra */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Tipografía */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Colores del Logo oficial de la Fundación Vitra (Terracota y Ámbar) */
    --color-primary: #b84e26;        /* Terracota / Ladrillo */
    --color-primary-rgb: 184, 78, 38;
    --color-primary-light: #d66438;
    --color-primary-dark: #8c3817;

    --color-secondary: #eea41f;      /* Ámbar / Amarillo cálido */
    --color-secondary-rgb: 238, 164, 31;
    --color-secondary-light: #f5b94f;
    --color-secondary-dark: #b87c10;

    /* Fondos y Textos */
    --color-bg-main: #faf8f5;        /* Alabastro / Off-white cálido */
    --color-bg-alt: #f4efea;         /* Crema suave para alternancia */
    --color-bg-card: #ffffff;        /* Blanco puro para tarjetas */
    
    --color-text-main: #2b2d2f;      /* Slate oscuro para legibilidad */
    --color-text-muted: #5e6266;     /* Gris para subtítulos y textos secundarios */
    --color-text-light: #ffffff;     /* Texto sobre fondos oscuros */
    
    /* Colores Estratégicos de Apoyo */
    --color-green: #2e7d32;          /* Verde para Medio Ambiente y Sostenibilidad */
    --color-green-light: #e8f5e9;
    --color-blue: #1565c0;           /* Azul para Inclusión Social y Cooperación */
    --color-blue-light: #e3f2fd;
    --color-error: #c62828;
    --color-success: #2e7d32;

    /* Sombras (Box Shadows) */
    --shadow-sm: 0 2px 4px rgba(43, 45, 47, 0.05);
    --shadow-md: 0 4px 12px rgba(43, 45, 47, 0.08);
    --shadow-lg: 0 10px 25px rgba(43, 45, 47, 0.12);
    --shadow-hover: 0 15px 35px rgba(184, 78, 38, 0.15);

    /* Radios y Espaciados */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transiciones */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s ease;

    /* Layout Constraints */
    --max-width: 1200px;
    --header-height: 80px;
}

/* Modo Oscuro (Opcional - Estética y Accesibilidad) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-main: #141517;
        --color-bg-alt: #1a1c1e;
        --color-bg-card: #202225;
        
        --color-text-main: #f0f2f5;
        --color-text-muted: #a0a5ad;
        
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    }
}

/* ==========================================================================
   1. Reset y Estilos Base
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 1rem;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

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

ul, ol {
    list-style: none;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* ==========================================================================
   2. Utilidades y Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
    padding: 5rem 0;
}

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

.section-title {
    font-size: 2.25rem;
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

.section-title.left::after {
    left: 0;
    transform: none;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 3rem auto;
}

/* Flex & Grid Utilities */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* ==========================================================================
   3. Botones y Elementos Interactivos
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-family: var(--font-heading);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(184, 78, 38, 0.3);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: #141517; /* Contraste oscuro para legibilidad */
}

.btn-secondary:hover {
    background-color: var(--color-secondary-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(238, 164, 31, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    transform: translateY(-2px);
}

.btn-outline-white {
    background-color: transparent;
    border-color: var(--color-text-light);
    color: var(--color-text-light);
}

.btn-outline-white:hover {
    background-color: var(--color-text-light);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ==========================================================================
   4. Header y Menú de Navegación
   ========================================================================== */
.header {
    background-color: var(--color-bg-card);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.92);
    height: 70px;
}

@media (prefers-color-scheme: dark) {
    .header.scrolled {
        background-color: rgba(20, 21, 23, 0.92);
    }
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    transition: var(--transition-normal);
}

.header.scrolled .navbar {
    height: 70px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-img {
    height: 55px;
    width: auto;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.header.scrolled .logo-img {
    height: 48px;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-main);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2.5px;
    background-color: var(--color-primary);
    transition: var(--transition-normal);
    border-radius: var(--radius-full);
}

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

.nav-link.active {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.8rem;
    color: var(--color-text-main);
}

/* ==========================================================================
   5. Hero Section (Inicio)
   ========================================================================== */
.hero {
    position: relative;
    background-image: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.75)), url('../images/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--color-text-light);
    padding: 8rem 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ==========================================================================
   6. Tarjetas e Iconos (Líneas de Acción y Proyectos)
   ========================================================================== */
.card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 2.5rem;
    transition: var(--transition-normal);
    border: 1px solid rgba(43, 45, 47, 0.04);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-primary);
    transition: var(--transition-normal);
    opacity: 0;
}

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

.card:hover::before {
    opacity: 1;
}

.card-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.card-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   7. Estadísticas / Cifras de Impacto
   ========================================================================== */
.stats-section {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 3.5rem;
    color: var(--color-secondary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.9);
}

/* ==========================================================================
   8. Galería y Filtros (Página de Proyectos)
   ========================================================================== */
.filter-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--color-bg-card);
    border: 1px solid rgba(43, 45, 47, 0.15);
    padding: 0.6rem 1.4rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    transition: var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    border-color: var(--color-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid rgba(43, 45, 47, 0.05);
    display: flex;
    flex-direction: column;
}

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

.project-img-container {
    position: relative;
    overflow: hidden;
    padding-top: 60%; /* Relación 5:3 */
}

.project-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.project-body {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
}

.project-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-meta {
    border-top: 1px solid rgba(43, 45, 47, 0.08);
    padding-top: 1rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ==========================================================================
   9. Organigrama (Nosotros)
   ========================================================================== */
.org-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    margin: 4rem 0;
}

.org-level {
    display: flex;
    justify-content: center;
    gap: 2rem;
    width: 100%;
    flex-wrap: wrap;
}

.org-node {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    text-align: center;
    border-top: 4px solid var(--color-primary);
    min-width: 220px;
    max-width: 280px;
}

.org-node.sub {
    border-top-color: var(--color-secondary);
}

.org-role {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-primary);
}

.org-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

/* ==========================================================================
   10. Formularios y Contacto
   ========================================================================== */
.contact-layout {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr;
    gap: 3rem;
}

.contact-info-panel {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: 3rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    background-image: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.contact-info-panel h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.contact-info-desc {
    opacity: 0.85;
    margin-bottom: 2.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.contact-detail-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact-detail-icon {
    font-size: 1.3rem;
    color: var(--color-secondary);
    margin-top: 0.2rem;
}

.contact-detail-text h4 {
    font-size: 0.95rem;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 0.2rem;
    opacity: 0.8;
}

.contact-detail-text p {
    margin-bottom: 0;
    font-size: 1.05rem;
}

.contact-form-panel {
    background-color: var(--color-bg-card);
    padding: 3rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(43, 45, 47, 0.05);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid rgba(43, 45, 47, 0.15);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-main);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(184, 78, 38, 0.15);
    background-color: var(--color-bg-card);
}

.map-container {
    margin-top: 3rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 400px;
    border: 1px solid rgba(43, 45, 47, 0.08);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ==========================================================================
   11. Pie de Página (Footer)
   ========================================================================== */
.footer {
    background-color: #1e2022;
    color: #e4e6eb;
    padding: 5rem 0 2rem 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-column h3 {
    color: var(--color-text-light);
    font-size: 1.15rem;
    margin-bottom: 1.8rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 35px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

.footer-about p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.footer-socials {
    display: flex;
    gap: 1rem;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: rgba(255, 255, 255, 0.08);
    transition: var(--transition-normal);
    color: var(--color-text-light);
}

.social-icon:hover {
    background-color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-link-item {
    font-size: 0.95rem;
    opacity: 0.8;
}

.footer-link-item:hover {
    opacity: 1;
    color: var(--color-secondary);
    padding-left: 5px;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-contact-item {
    display: flex;
    gap: 0.8rem;
    font-size: 0.95rem;
    opacity: 0.8;
}

.footer-contact-icon {
    color: var(--color-secondary);
    margin-top: 0.2rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    opacity: 0.7;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ==========================================================================
   12. Media Queries y Adaptabilidad
   ========================================================================== */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--color-bg-card);
        flex-direction: column;
        align-items: center;
        padding: 3rem 0;
        transition: var(--transition-normal);
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.15rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero {
        padding: 5rem 0;
        min-height: auto;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .hero-desc {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.8rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* ==========================================================================
   13. Efectos de Entrada e Intersección (Scroll Reveals)
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}