/* Global Styles & Layout */

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    height: 100%;
}

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

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

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

p:last-child {
    margin-bottom: 0;
}

strong {
    font-weight: 600;
    color: var(--color-accent-light);
}

/* Links */
a {
    transition: color var(--transition-fast);
}

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

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

/* Section Spacing */
section {
    padding: var(--section-spacing) 0;
    position: relative;
}

.section-title {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2xl);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: var(--space-md) auto 0;
    border-radius: var(--radius-full);
}

/* Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-header-bg);
    backdrop-filter: blur(12px);
    border-bottom: none;
    z-index: var(--z-fixed);
    transition: background var(--transition-base);
}

/* Wave Divider: ancla al borde inferior real de .site-header (bottom: -6px
   centra la banda de 12px sobre ese borde) en vez de un top fijo en píxeles,
   que se desalineaba en los breakpoints donde el logo cambia de tamaño y la
   cabecera mide menos. Al vivir dentro de .site-header comparte su contexto
   de apilamiento, así --z-dropdown puede ganarle de forma fiable. */
.wave-divider {
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    width: 100%;
    height: 12px;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: 100%;
}

.wave-rect {
    animation: wave-slide 30s linear infinite;
}

@keyframes wave-slide {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-240px);
    }
}

/* Footer Wave Divider: onda rellena que funde el contenido con el pie crema */
.footer-wave-divider {
    position: relative;
    width: 100%;
    height: 40px;
    overflow: hidden;
    pointer-events: none;
    margin-top: var(--space-2xl);
    margin-bottom: -1px;
}

.footer-wave-divider svg {
    display: block;
    width: 100%;
    height: 100%;
}

.footer-wave-rect {
    animation: footer-wave-slide 30s linear infinite;
}

@keyframes footer-wave-slide {
    0% {
        transform: translateX(-240px);
    }
    100% {
        transform: translateX(0);
    }
}

@keyframes wave-animation {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-sm) var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-img {
    height: 48px;
    width: 48px;
    object-fit: contain;
    transition: transform var(--transition-base);
}

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

.logo-text-container {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-text {
    display: inline-block;
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    line-height: 1;
}

.logo-subtitle {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 400;
    color: var(--color-text-secondary);
    line-height: 1;
}

.logo:hover {
    color: var(--color-accent);
}

.logo:hover .logo-subtitle {
    color: var(--color-text);
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    margin-top: var(--space-sm);
    box-shadow: var(--shadow-xl);
    /* Por encima de .wave-divider (z-index: 1), dentro del mismo contexto
       de apilamiento de .site-header. */
    z-index: var(--z-dropdown);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.nav-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-link {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.dropdown-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    padding-left: calc(var(--space-lg) + 4px);
}

.dropdown-link.active {
    color: var(--color-text);
    background: var(--color-bg-secondary);
    box-shadow: inset 3px 0 0 var(--color-accent);
}

/* Language Selector */
.language-selector {
    margin-left: var(--space-md);
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 4px;
}

.lang-icon {
    font-size: 1.2em;
}

.flag-icon {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
    vertical-align: middle;
}

.lang-menu {
    min-width: 180px;
}

.lang-menu .dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: var(--z-modal);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: background var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    left: 0;
    transition: transform var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg) translateY(0);
    top: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg) translateY(0);
    top: 0;
}

/* Footer */
.site-footer {
    padding: var(--space-xl) 0;
    background: var(--color-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-xl);
}

.footer-copyright {
    color: var(--color-primary);
    font-size: var(--text-sm);
    margin: 0;
    font-weight: 400;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-secondary);
    color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(var(--navy-rgb), 0.3);
}

.footer-social svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 767px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .footer-social {
        justify-content: center;
    }
}

/* Utilities */
.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;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-sm);
        --section-spacing: var(--space-3xl);
    }
    
    .logo-img {
        height: 40px;
        width: 40px;
    }
    
    .logo-text {
        font-size: var(--text-base);
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-bg-elevated);
        border-left: 1px solid var(--color-border);
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-3xl) var(--space-lg);
        justify-content: flex-start;
        transition: right var(--transition-slow);
        z-index: var(--z-fixed);
    }
    
    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    .nav-dropdown .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        margin-top: var(--space-xs);
        box-shadow: none;
        border: none;
        background: var(--color-bg);
    }
    
    .nav-link {
        font-size: var(--text-base);
    }
    
    .nav-link {
        font-size: var(--text-lg);
        width: 100%;
        padding: var(--space-sm) 0;
    }
    
    .nav-link::after {
        display: none;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --container-max: 960px;
    }
}

/* Texto del pie sobre fondo crema */
.site-footer .footer-text,
.site-footer p {
    color: var(--color-primary);
}