/* ============================================
   CSS VARIABLES (ROOT) - OPTIMIZED
   ============================================ */
:root {
    --primary-blue: #0066FF;
    --light-blue: #00A3FF;
    --sky-blue: #5CC5FF;
    --accent-yellow: #FFD700;
    --dark-blue: #003380;
    --text-dark: #0A1628;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --light-gray: #F8FAFC;
    
    /* Performance optimizations */
    --border-radius: 20px;
    --border-radius-small: 10px;
    --border-radius-full: 50px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
    --shadow-light: 0 4px 20px rgba(0, 102, 255, 0.08);
    --shadow-medium: 0 10px 30px rgba(0, 102, 255, 0.15);
    --shadow-heavy: 0 20px 60px rgba(0, 102, 255, 0.2);
    --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    --gradient-bg: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
}

/* ============================================
   CRITICAL BASE STYLES (Above the fold)
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   PERFORMANCE OPTIMIZED LOADER
   ============================================ */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-circle {
    width: 50px;
    height: 50px;
    border: 3px solid var(--light-blue);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    will-change: transform;
}

/* ============================================
   OPTIMIZED NAVIGATION WITH MOBILE MENU
   ============================================ */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid rgba(0, 102, 255, 0.1);
    will-change: transform, box-shadow;
}

nav.scrolled {
    box-shadow: var(--shadow-light);
    transform: translateZ(0);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: 800;
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    color: var(--primary-blue);
    transition: transform var(--transition-normal);
    z-index: 1001;
}

.logo:hover {
    transform: scale(1.05) translateZ(0);
}

.logo img {
    height: clamp(60px, 8vw, 80px);
    width: auto;
    margin-right: 10px;
    object-fit: contain;
}

/* Hamburger Menu */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    z-index: 1001;
    transition: transform var(--transition-normal);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: all var(--transition-normal);
    border-radius: 3px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
    margin: 0;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-normal);
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width var(--transition-normal);
}

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

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

.cta-button {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius-full);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
    will-change: transform;
    white-space: nowrap;
}

.cta-button:hover {
    transform: translateY(-2px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

/* ============================================
   OPTIMIZED HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient-bg);
    overflow: hidden;
    padding-top: clamp(80px, 12vw, 120px);
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    right: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 163, 255, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
    will-change: transform;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 5rem) 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
    position: relative;
    z-index: 10;
}

.hero-content h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease;
}

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-light);
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.2s both;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: clamp(1.5rem, 4vw, 3rem);
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease 0.4s both;
    color: black;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.stat-number {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--primary-blue);
    display: block;
}

.stat-label {
    color: black;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    animation: fadeInUp 0.8s ease 0.6s both;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    animation: fadeInRight 0.8s ease 0.4s both;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    object-fit: cover;
}

.floating-card {
    position: absolute;
    background: var(--white);
    border-radius: 15px;
    padding: clamp(1rem, 2vw, 1.5rem);
    box-shadow: var(--shadow-medium);
    animation: floatCard 3s ease-in-out infinite;
    will-change: transform;
    font-size: clamp(0.8rem, 1.5vw, 1rem);
}

.floating-card.top {
    top: -20px;
    right: 20px;
}

.floating-card.bottom {
    bottom: 20px;
    left: -30px;
}

/* ============================================
   OPTIMIZED GLOBAL BUTTONS
   ============================================ */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    padding: clamp(0.8rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2.5rem);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
    will-change: transform;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.btn-primary:hover {
    transform: translateY(-3px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    color: var(--primary-blue);
    padding: clamp(0.8rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2.5rem);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    font-weight: 600;
    border: 2px solid var(--primary-blue);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    will-change: transform;
    white-space: nowrap;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-3px) translateZ(0);
}

/* ============================================
   OPTIMIZED SECTIONS GENERAL
   ============================================ */
.section {
    padding: clamp(3rem, 8vw, 5rem) 0;
    position: relative;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

.section-header {
    text-align: center;
    margin-bottom: clamp(2rem, 5vw, 4rem);
}

.section-title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title span {
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.seal-work-banner {
    background: var(--gradient-primary);
    color: var(--white);
    padding: clamp(8px, 2vw, 12px) clamp(20px, 5vw, 40px);
    margin: 20px auto 0;
    position: relative;
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: clamp(0.7rem, 1.5vw, 0.9rem);
    box-shadow: var(--shadow-medium);
    width: fit-content;
    max-width: 90%;
}

.seal-work-banner::before,
.seal-work-banner::after {
    content: '';
    position: absolute;
    top: 0;
    width: 0;
    height: 0;
    border-style: solid;
}

.seal-work-banner::before {
    left: -15px;
    border-width: 0 15px 48px 0;
    border-color: transparent var(--primary-blue) transparent transparent;
}

.seal-work-banner::after {
    right: -15px;
    border-width: 48px 15px 0 0;
    border-color: var(--primary-blue) transparent transparent transparent;
}

/* ============================================
   OPTIMIZED ABOUT SECTION
   ============================================ */
.about {
    background: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

.about-text h3 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-box {
    background: var(--white);
    padding: clamp(1rem, 2vw, 1.5rem);
    border-radius: 15px;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all var(--transition-normal);
    border: 1px solid rgba(0, 102, 255, 0.1);
    will-change: transform;
}

.feature-box:hover {
    transform: translateY(-5px) translateZ(0);
    box-shadow: var(--shadow-medium);
    border-color: var(--light-blue);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 163, 255, 0.1));
    border-radius: var(--border-radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 1.5rem;
    color: var(--primary-blue);
}

/* ============================================
   HIGHLY OPTIMIZED SECTORS SECTION
   ============================================ */
.sectors {
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.sectors-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.sector-block {
    position: relative;
    min-height: clamp(250px, 40vw, 350px);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
    box-shadow: var(--shadow-light);
    will-change: transform;
}

.sector-block:hover {
    transform: translateY(-8px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

.sector-bg-effect {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform var(--transition-slow);
}

/* Optimized background images with better loading */
.agricola .sector-bg-effect {
    background-image: url('../assets/images/Sectores/Sector-agricola.jpeg');
}

.industrial .sector-bg-effect {
    background-image: url('../assets/images/Sectores/Sector-Industrial.jpeg');
}

.minera .sector-bg-effect {
    background-image: url('../assets/images/Sectores/sector-minero.jpeg');
}

.energia .sector-bg-effect {
    background-image: url('../assets/images/Sectores/Sector-electrico.jpeg');
}

.comercial .sector-bg-effect {
    background-image: url('../assets/images/Sectores/comercial.jpeg');
}

.gobierno .sector-bg-effect {
    background-image: url('../assets/images/Sectores/Sector-gobierno.jpg');
}

.sector-bg-effect::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.4) 100%);
    transition: background var(--transition-slow);
}

.sector-block:hover .sector-bg-effect::after {
    background: rgba(0, 0, 0, 0.3);
}

.sector-block.featured {
    grid-column: span 2;
    grid-row: span 2;
}

.sector-content {
    position: relative;
    z-index: 2;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--white);
    opacity: 1;
    transform: translateY(0);
    transition: all var(--transition-slow);
}

.sector-block:hover .sector-content {
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
}

.sector-icon-wrapper {
    width: clamp(60px, 8vw, 80px);
    height: clamp(60px, 8vw, 80px);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
}

.sector-icon-wrapper i {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--white);
}

.sector-content h3 {
    font-size: clamp(1.3rem, 3vw, 2rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--white);
}

.sector-details {
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.sector-details p {
    margin-bottom: 0.5rem;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    position: relative;
    padding-left: 1.5rem;
}

.sector-details p::before {
    content: '→';
    position: absolute;
    left: 0;
    opacity: 0.7;
}

.sector-stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: clamp(1rem, 2vw, 1.5rem);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-value {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--white);
}

.stat-label {
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    opacity: 0.9;
    color: black;
}

.sector-hover-content {
    position: absolute;
    inset: 0;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 3;
}

.sector-block:hover .sector-hover-content {
    opacity: 1;
    transform: translateY(0);
}

.sector-hover-content h4 {
    font-size: clamp(1.3rem, 3vw, 1.8rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.sector-hover-content p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 2rem;
    font-size: clamp(0.9rem, 2vw, 1rem);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.sector-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    padding: clamp(0.8rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    will-change: transform;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.sector-cta:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px) translateZ(0);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.sector-cta i {
    transition: transform var(--transition-normal);
}

.sector-cta:hover i {
    transform: translateX(5px);
}

.sectors-impact {
    display: flex;
    justify-content: center;
    gap: clamp(2rem, 5vw, 4rem);
    padding: clamp(2rem, 4vw, 3rem);
    background: var(--light-gray);
    border-radius: var(--border-radius);
    margin-top: 4rem;
    flex-wrap: wrap;
}

.impact-item {
    text-align: center;
    flex: 1;
    min-width: 150px;
}

.impact-number {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    display: block;
}

.impact-label {
    color: var(--text-light);
    font-size: clamp(0.9rem, 2vw, 1rem);
}

/* ============================================
   OPTIMIZED LOGO CAROUSEL
   ============================================ */
.clients {
    background: var(--gradient-bg);
    position: relative;
    overflow: hidden;
    padding: clamp(3rem, 6vw, 5rem) 0;
}

.logo-carousel {
    margin: clamp(2rem, 5vw, 4rem) 0;
    overflow: hidden;
    position: relative;
    mask: linear-gradient(90deg, transparent, white 20%, white 80%, transparent);
    -webkit-mask: linear-gradient(90deg, transparent, white 20%, white 80%, transparent);
}

.logo-track {
    display: flex;
    gap: clamp(1.5rem, 3vw, 3rem);
    animation: scrollLogos 60s linear infinite;
    width: max-content;
    will-change: transform;
}

.logo-carousel:hover .logo-track {
    animation-play-state: paused;
}

.logo-item {
    flex-shrink: 0;
    width: clamp(150px, 20vw, 200px);
    height: clamp(80px, 10vw, 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: 15px;
    padding: clamp(0.8rem, 2vw, 1rem);
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(0, 102, 255, 0.1);
    transition: all var(--transition-normal);
    will-change: transform;
}

.logo-item:hover {
    transform: translateY(-5px) translateZ(0);
    box-shadow: var(--shadow-medium);
    border-color: var(--light-blue);
}

.logo-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(1) opacity(0.7);
    transition: all var(--transition-normal);
}

.logo-item:hover img {
    filter: grayscale(0) opacity(1);
    transform: scale(1.1);
}

/* ============================================
   OPTIMIZED PROJECTS SECTION
   ============================================ */
.projects {
    background: var(--light-gray);
}

.projects-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 3rem;
}

.project-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    will-change: transform;
}

.project-card:hover {
    transform: translateY(-10px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

.project-image,
.project-image-arequipa,
.project-image-arequi {
    width: 100%;
    height: clamp(200px, 40vw, 500px);
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.project-image {
    background-image: url("./assets/images/QUELLAVECO/Nosotros-panelsolar.jpeg");
}

.project-image-arequipa {
    background-image: url("./assets/images/Kleinfort/image1.jpg");
}

.project-image-arequi{
    background-image: url("./assets/images/Villa/image1.jpeg");
}

.project-image::after,
.project-image-arequipa::after,
.project-image-arequi::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-image::after,
.project-card:hover .project-image-arequipa::after,
.project-card:hover .project-image-arequi::after {
    opacity: 1;
}

.project-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    text-align: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-info {
    padding: clamp(1.5rem, 3vw, 2rem);
}

.project-tag {
    display: inline-block;
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-blue);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-full);
    font-size: clamp(0.8rem, 1.5vw, 0.85rem);
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-title {
    font-size: clamp(1.1rem, 2.5vw, 1.25rem);
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.project-location {
    color: var(--text-light);
    font-size: clamp(0.85rem, 2vw, 0.9rem);
}

/* ============================================
   OPTIMIZED CONTACT SECTION
   ============================================ */
.contact {
    background: var(--gradient-bg);
    position: relative;
    overflow: hidden;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: flex-start;
}

.contact-form {
    background: var(--white);
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.form-control {
    width: 100%;
    padding: clamp(0.8rem, 2vw, 1rem);
    border: 2px solid #E5E7EB;
    border-radius: var(--border-radius-small);
    font-family: inherit;
    font-size: clamp(0.9rem, 2vw, 1rem);
    transition: all var(--transition-normal);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

/* Form validation styles */
.error-message {
    color: #ef4444;
    font-size: clamp(0.8rem, 1.5vw, 0.875rem);
    margin-top: 0.25rem;
    display: block;
}

.form-control.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-submit {
    background: var(--gradient-primary);
    color: var(--white);
    padding: clamp(0.8rem, 2vw, 1rem) clamp(2rem, 4vw, 3rem);
    border: none;
    border-radius: var(--border-radius-full);
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 100%;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.form-submit:hover:not(:disabled) {
    transform: translateY(-2px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

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

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.contact-info h3 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-method-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 163, 255, 0.1));
    border-radius: var(--border-radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-method-icon i {
    font-size: 1.25rem;
    color: var(--primary-blue);
}

/* ============================================
   OPTIMIZED MESSAGE MODAL
   ============================================ */
.message-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity var(--transition-normal);
    padding: 1rem;
}

.message-modal.show {
    opacity: 1;
}

.message-content {
    background: var(--white);
    padding: clamp(2rem, 4vw, 2.5rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--border-radius);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    text-align: center;
    max-width: 420px;
    width: 100%;
    transform: translateY(-20px) scale(0.95);
    transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.message-modal.show .message-content {
    transform: translateY(0) scale(1);
}

.message-icon {
    width: clamp(60px, 10vw, 80px);
    height: clamp(60px, 10vw, 80px);
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    position: relative;
}

.message-icon::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    opacity: 0.1;
    animation: pulseRing 2s ease-out infinite;
}

/* Success state */
.message-content.success .message-icon {
    background: linear-gradient(135deg, #10b981, #059669);
    color: var(--white);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.message-content.success .message-icon::before {
    background: #10b981;
}

.message-content.success .message-title {
    color: #059669;
}

/* Error state */
.message-content.error .message-icon {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: var(--white);
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

.message-content.error .message-icon::before {
    background: #ef4444;
}

.message-content.error .message-title {
    color: #dc2626;
}

/* Loading state */
.message-content.loading .message-icon {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

.message-content.loading .message-icon::before {
    background: var(--primary-blue);
}

.message-content.loading .message-title {
    color: var(--primary-blue);
}

.message-title {
    font-size: clamp(1.3rem, 3vw, 1.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
    line-height: 1.2;
}

.message-text {
    font-size: clamp(0.9rem, 2vw, 1rem);
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
    white-space: pre-line;
}

.message-close {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: clamp(0.8rem, 2vw, 0.875rem) clamp(2rem, 4vw, 2.5rem);
    border-radius: var(--border-radius-full);
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
    will-change: transform;
    min-width: 120px;
}

.message-close:hover {
    transform: translateY(-2px) translateZ(0);
    box-shadow: var(--shadow-medium);
}

.message-close:active {
    transform: translateY(0) translateZ(0);
}

/* Success specific button */
.message-content.success .message-close {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.message-content.success .message-close:hover {
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

/* Error specific button */
.message-content.error .message-close {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.message-content.error .message-close:hover {
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
}

/* Pulse animation for icon */
@keyframes pulseRing {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    80%, 100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

/* ============================================
   OPTIMIZED FOOTER
   ============================================ */
footer {
    background: var(--text-dark);
    color: var(--white);
    padding: clamp(3rem, 6vw, 4rem) 0 clamp(1.5rem, 3vw, 2rem);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: clamp(2rem, 4vw, 3rem);
    margin-bottom: clamp(2rem, 4vw, 3rem);
}

.footer-brand h3 {
    font-size: clamp(1.3rem, 3vw, 1.5rem);
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: all var(--transition-normal);
    will-change: transform;
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-3px) translateZ(0);
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: clamp(1.1rem, 2.5vw, 1.2rem);
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-normal);
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.footer-links a:hover {
    color: var(--sky-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: clamp(0.85rem, 1.5vw, 0.9rem);
}

/* ============================================
   OPTIMIZED ANIMATIONS & KEYFRAMES
   ============================================ */
@keyframes spin {
    to { 
        transform: rotate(360deg); 
    }
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0) rotate(0deg); 
    }
    50% { 
        transform: translateY(-30px) rotate(180deg); 
    }
}

@keyframes floatCard {
    0%, 100% { 
        transform: translateY(0); 
    }
    50% { 
        transform: translateY(-10px); 
    }
}

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

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

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

/* ============================================
   SCROLL REVEAL OPTIMIZED
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Hardware acceleration for frequently animated elements */
.hero-bg-pattern,
.floating-card,
.logo-track,
.sector-block,
.project-card,
.btn-primary,
.btn-secondary,
.cta-button,
.social-link {
    will-change: transform;
    transform: translateZ(0);
}

/* Optimize font rendering */
body,
.section-title,
.hero-content h1 {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Reduce repaints on scroll */
nav {
    transform: translateZ(0);
}

/* ============================================
   RESPONSIVE DESIGN OPTIMIZADO - MOBILE FIRST
   ============================================ */

/* TABLET GRANDE (1200px+) */
@media (min-width: 1200px) {
    .sectors-showcase {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .sector-block.featured {
        grid-column: span 2;
        grid-row: span 2;
    }
}

/* TABLET (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .sectors-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sector-block.featured {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .sectors-impact {
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* MÓVIL GRANDE (481px - 768px) */
@media (max-width: 768px) {
    /* NAVEGACIÓN MÓVIL */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-light);
        padding: 2rem 0;
        z-index: 999;
        gap: 1.5rem;
    }

    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.1rem;
        padding: 1rem 0;
    }
    
    .cta-button {
        margin-top: 1rem;
    }
    
    /* HERO MÓVIL */
    .hero {
        min-height: 90vh;
        padding-top: 100px;
    }
    
    .hero-stats {
        justify-content: space-around;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    /* SECTORES MÓVIL */
    .sectors-showcase {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .sector-block.featured {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .sector-block {
        min-height: 300px;
    }
    
    .sectors-impact {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    /* ABOUT MÓVIL */
    .about-features {
        grid-template-columns: 1fr;
    }
    
    /* PROYECTOS MÓVIL */
    .projects-showcase {
        grid-template-columns: 1fr;
    }
    
    /* FOOTER MÓVIL */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* BANNER MÓVIL */
    .seal-work-banner::before,
    .seal-work-banner::after {
        display: none;
    }
    
    .seal-work-banner {
        border-radius: var(--border-radius-small);
    }
}

/* MÓVIL PEQUEÑO (320px - 480px) */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    .hero {
        min-height: 80vh;
        padding-top: 90px;
    }
    
    .hero-container {
        padding: 2rem 1rem;
    }
    
    .section {
        padding: 2.5rem 0;
    }
    
    .section-container {
        padding: 0 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .hero-buttons {
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .floating-card {
        display: none; /* Ocultar en móviles muy pequeños */
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .sector-content,
    .sector-hover-content {
        padding: 1.5rem;
    }
    
    .sectors-impact {
        padding: 2rem 1rem;
    }
    
    .logo-item {
        width: 140px;
        height: 80px;
    }
    
    .project-info {
        padding: 1.5rem;
    }
    
    /* Modal móvil pequeño */
    .message-modal {
        padding: 0.5rem;
    }
    
    .message-content {
        padding: 2rem 1.5rem;
    }
    
    .message-close {
        width: 100%;
        padding: 1rem;
    }
}

/* MÓVIL MUY PEQUEÑO (hasta 360px) */
@media (max-width: 360px) {
    html {
        font-size: 13px;
    }
    
    .nav-container {
        padding: 0.8rem;
    }
    
    .logo img {
        height: 50px;
    }
    
    .hero-container {
        padding: 1.5rem 0.8rem;
    }
    
    .section-container {
        padding: 0 0.8rem;
    }
    
    .logo-item {
        width: 120px;
        height: 70px;
    }
    
    .contact-form {
        padding: 1.2rem;
    }
}

/* LANDSCAPE MÓVIL */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 120px 0 2rem;
    }
    
    .hero-container {
        padding: 2rem 1rem;
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-visual {
        order: 0;
    }
    
    .floating-card {
        display: none;
    }
}

/* ============================================
   OPTIMIZACIONES ESPECÍFICAS PARA TOUCH
   ============================================ */
@media (hover: none) and (pointer: coarse) {
    /* Mejor experiencia táctil */
    .btn-primary,
    .btn-secondary,
    .cta-button,
    .nav-link,
    .social-link {
        min-height: 44px; /* Tamaño mínimo para touch */
    }
    
    .sector-block:hover .sector-content,
    .sector-block:hover .sector-hover-content {
        /* Desactivar hover en dispositivos táctiles */
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }
    
    .logo-carousel:hover .logo-track {
        animation-play-state: running; /* Mantener animación en móviles */
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    nav,
    .loader,
    .floating-card,
    .btn-primary,
    .btn-secondary,
    .hero-bg-pattern {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    .section {
        page-break-inside: avoid;
    }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .hero-bg-pattern,
    .floating-card,
    .logo-track {
        animation: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: #0000FF;
        --text-dark: #000000;
        --text-light: #333333;
    }
    
    .btn-primary,
    .cta-button {
        border: 2px solid var(--white);
    }
}

/* Focus management for better accessibility */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

.btn-primary:focus,
.btn-secondary:focus,
.form-control:focus,
.nav-link:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   UTILITIES RESPONSIVAS
   ============================================ */
.mobile-only {
    display: none;
}

.desktop-only {
    display: block;
}

@media (max-width: 768px) {
    .mobile-only {
        display: block;
    }
    
    .desktop-only {
        display: none;
    }
    
    .mobile-center {
        text-align: center;
    }
    
    .mobile-full-width {
        width: 100%;
    }
}