/**
 * GESYTEC Ingenieros, S.L. - Estilos CSS
 * Web Corporativa One Page
 * Estética: Minimalismo corporativo institucional
 * Mobile-first responsive design
 */

/* ========================================
   CSS VARIABLES
   ======================================== */
:root {
    /* Colores corporativos */
/*    --color-primary: #1a365d;
    --color-primary-dark: #0f2442;
    --color-primary-light: #2c5282;
    
    --color-secondary: #f7fafc;
    --color-gray-light: #edf2f7;
    --color-gray-medium: #718096;
    --color-gray-dark: #2d3748;
    
    --color-accent: #38a169;
    --color-accent-light: #48bb78;
    
    --color-white: #ffffff;
    --color-black: #1a202c;*/

    --color-primary: #556b2f;        /* Verde oliva base */
    --color-primary-dark: #3e4f22;   /* Verde oliva profundo */
    --color-primary-light: #6b8e23;  /* Verde oliva claro */

    --color-secondary: #f7faf5;      /* Fondo muy claro ligeramente cálido */
    --color-gray-light: #e6ebe2;
    --color-gray-medium: #6b7364;
    --color-gray-dark: #2f342c;

    --color-accent: #7aa33a;         /* Verde más vivo para CTA */
    --color-accent-light: #9acb52;

    --color-white: #ffffff;
    --color-black: #1f231c;
    /* Tipografía */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    
    /* Bordes */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Contenedor */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* ========================================
   RESET Y BASE
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

ul {
    list-style: none;
}

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

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    transition: all var(--transition-base);
}

.header--scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

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

.header__logo {
    display: flex;
    align-items: center;
}

.header__logo-img {
    height: 50px;
    width: auto;
}

.header__nav {
    display: none;
}

.header__nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.header__nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-dark);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

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

.header__nav-link:hover {
    color: var(--color-primary);
}

.header__cta {
    display: none;
    padding: 0.6rem 1.5rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.header__cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-1px);
}

/* Hamburger menu */
.header__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.header__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-gray-dark);
    transition: all var(--transition-fast);
}

.header__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.header__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.header__nav.active {
    display: flex;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
}

.header__nav.active .header__nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
}

.header__nav.active .header__nav-link {
    display: block;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-gray-light);
}

/* ========================================
   HERO
   ======================================== */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px var(--container-padding) var(--spacing-xl);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(85, 107, 47, 0.1) 0%,
        rgba(85, 107, 47, 0.4) 50%,
        rgba(85, 107, 47, 0.1) 100%
    );
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-lg);
}

.hero__title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.hero__text {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}

.hero__btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--color-white);
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

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

/* ========================================
   SECCIONES GENERALES
   ======================================== */
.section {
    padding: var(--spacing-2xl) 0;
}

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

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

.section__title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

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

.section__title--light {
    color: var(--color-white);
}

.section__divider {
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.section__divider--center {
    margin-left: auto;
    margin-right: auto;
}

.section__divider--light {
    background-color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   LA EMPRESA
   ======================================== */
.empresa {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.empresa__content {
    flex: 1;
}

.empresa__text {
    font-size: 1rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.75;
}

.empresa__text strong {
    color: var(--color-primary);
}

.empresa__image {
    flex: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.empresa__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 300px;
}

/* ========================================
   TABS - ÁREAS DE ACTIVIDAD
   ======================================== */
.tabs {
    margin-top: var(--spacing-lg);
}

.tabs__header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-gray-light);
    padding-bottom: var(--spacing-sm);
}

.tabs__btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: left;
    position: relative;
    border-radius: var(--radius-sm);
}

.tabs__btn svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.tabs__btn span {
    flex: 1;
    line-height: 1.4;
}

.tabs__btn:hover {
    color: var(--color-primary);
    background-color: var(--color-gray-light);
}

.tabs__btn.active {
    color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.tabs__btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px 2px 0 0;
}

.tabs__content {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.tabs__panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tabs__panel.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tabs__panel-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.tabs__panel-text {
    font-size: 1rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.75;
}

.tabs__panel-list {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-sm);
}

.tabs__panel-list li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    line-height: 1.6;
}

.tabs__panel-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

.tabs__panel-footer {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-gray-light);
    line-height: 1.7;
}

/* ========================================
   EXPERIENCIA Y COMPROMISO
   ======================================== */
.section--experiencia {
    position: relative;
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
}

.experiencia-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.experiencia-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(85, 107, 47, 0.4) 0%,
        rgba(85, 107, 47, 0.6) 50%,
        rgba(85, 107, 47, 0.4) 100%
    );
}

.experiencia {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.experiencia__content {
    margin-top: var(--spacing-lg);
}

.experiencia__content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* ========================================
   CONTACTO
   ======================================== */
.contacto {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contacto__info {
    flex: 1;
}

.contacto__info-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.contacto__item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-light);
}

.contacto__item:last-child {
    border-bottom: none;
}

.contacto__icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    color: var(--color-primary);
}

.contacto__icon svg {
    width: 100%;
    height: 100%;
}

.contacto__text {
    display: flex;
    flex-direction: column;
}

.contacto__text strong {
    font-size: 0.85rem;
    color: var(--color-gray-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.contacto__text span,
.contacto__text a {
    font-size: 1rem;
    color: var(--color-gray-dark);
}

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

/* Formulario */
.contacto__form-wrapper {
    flex: 1;
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.contacto__form-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

/* Honeypot - oculto */
.form-hp {
    position: absolute;
    left: -9999px;
    opacity: 0;
    pointer-events: none;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group--checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-xs);
}

.form-label .required {
    color: #e53e3e;
}

.form-label .optional {
    font-weight: 400;
    color: var(--color-gray-medium);
    font-size: 0.85rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-gray-dark);
    background-color: var(--color-secondary);
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-medium);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-checkbox {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-label--checkbox {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
    cursor: pointer;
    margin-bottom: 0;
}

.form-label--checkbox a {
    text-decoration: underline;
}

.form-submit {
    width: 100%;
    padding: 1rem 2rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.form-submit:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
}

.form-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.form-submit__loading {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.form-submit.loading .form-submit__text {
    display: none;
}

.form-submit.loading .form-submit__loading {
    display: flex;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

.spinner circle {
    stroke-dasharray: 60;
    stroke-dashoffset: 45;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Mensajes del formulario */
.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    display: none;
}

.form-message.success {
    display: block;
    background-color: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.form-message.error {
    display: block;
    background-color: #fed7d7;
    color: #c53030;
    border: 1px solid #feb2b2;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    margin-bottom: var(--spacing-md);
}

.footer__logo img {
    height: 60px;
    width: auto;
}

.footer__info p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 4px;
}

.footer__info a {
    color: rgba(255, 255, 255, 0.85);
}

.footer__info a:hover {
    color: var(--color-white);
}

.footer__links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.75);
    text-decoration: underline;
}

.footer__links a:hover {
    color: var(--color-white);
}

.footer__bottom {
    text-align: center;
}

.footer__bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   ANIMACIONES
   ======================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   RESPONSIVE - TABLET (768px+)
   ======================================== */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
    }
    
    .header__hamburger {
        display: none;
    }
    
    .header__nav {
        display: flex;
    }
    
    .header__cta {
        display: inline-block;
    }
    
    .empresa {
        flex-direction: row;
        align-items: center;
    }
    
    .tabs__header {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .tabs__btn {
        flex: 1;
        min-width: 200px;
        justify-content: center;
        text-align: center;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .tabs__btn span {
        flex: none;
    }
    
    .contacto {
        flex-direction: row;
    }
    
    .contacto__info,
    .contacto__form-wrapper {
        flex: 1;
    }
    
    .footer__content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
    
    .footer__info {
        text-align: center;
    }
}

/* ========================================
   RESPONSIVE - DESKTOP (1024px+)
   ======================================== */
@media (min-width: 1024px) {
    :root {
        --container-padding: 2.5rem;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero__content {
        padding: var(--spacing-xl);
    }
    
    .tabs__btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.95rem;
    }
    
    .empresa__image img {
        min-height: 400px;
    }
}

/* ========================================
   ACCESIBILIDAD
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}

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

@media (prefers-contrast: high) {
    :root {
        --color-gray-medium: #4a5568;
    }
}