/* =====================================================
   VIRYA POWER SOLUTIONS - Main Stylesheet
   Brand Colors:
   - Azul Virya (Primary): #2D4A58
   - White: #FFFFFF
   - Azul Gris (Secondary): #657A85
   - Negro/Dark: #353839
   ===================================================== */

/* CSS Variables */
:root {
    --color-primary: #2D4A58;
    --color-secondary: #657A85;
    --color-white: #FFFFFF;
    --color-dark: #353839;
    --color-light-bg: #F8F9FA;
    
    --font-family: 'Raleway', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --max-width: 1200px;
    --nav-height: 80px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* =====================================================
   NAVIGATION
   ===================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 1001;
}

.logo-img {
    height: 40px;
    width: auto;
    transition: filter var(--transition-normal);
}

.navbar.scrolled .logo-img {
    filter: brightness(0) saturate(100%) invert(26%) sepia(15%) saturate(1057%) hue-rotate(157deg) brightness(94%) contrast(89%);
}

.logo-text {
    font-weight: 700;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    color: var(--color-white);
    transition: color var(--transition-normal);
}

.navbar.scrolled .logo-text {
    color: var(--color-primary);
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-white);
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.navbar.scrolled .nav-link {
    color: var(--color-dark);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    background: rgba(255, 255, 255, 0.1);
    transition: background var(--transition-fast);
}

.navbar.scrolled .lang-toggle {
    background: rgba(45, 74, 88, 0.1);
}

.lang-option {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-white);
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.navbar.scrolled .lang-option {
    color: var(--color-dark);
}

.lang-option.active {
    opacity: 1;
}

.lang-separator {
    color: var(--color-white);
    opacity: 0.5;
}

.navbar.scrolled .lang-separator {
    color: var(--color-dark);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    position: relative;
    z-index: 1001;
}

.hamburger {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-normal);
}

.navbar.scrolled .hamburger {
    background: var(--color-dark);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: inherit;
    transition: all var(--transition-normal);
}

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

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

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
    background: var(--color-dark);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
    background: var(--color-dark);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a3340 100%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background: radial-gradient(circle at 20% 80%, var(--color-secondary) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, var(--color-secondary) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    font-size: 1.0625rem;
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    color: var(--color-white);
    opacity: 0.7;
    animation: bounce 2s infinite;
    transition: opacity var(--transition-fast);
}

.scroll-indicator:hover {
    opacity: 1;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(10px);
    }
    60% {
        transform: translateY(5px);
    }
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 0.375rem;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-white);
}

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

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.btn-white:hover {
    background: transparent;
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
}

/* =====================================================
   SECTIONS
   ===================================================== */
.section {
    padding: 6rem 0;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 1rem;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.section-subtitle-light {
    color: rgba(255, 255, 255, 0.85);
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about {
    background: var(--color-white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto 4rem;
    text-align: center;
}

.about-text {
    font-size: 1.0625rem;
    color: var(--color-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-highlight {
    font-weight: 600;
    color: var(--color-primary);
}

.pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.pillar-card {
    background: var(--color-white);
    border-radius: 0.75rem;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid rgba(101, 122, 133, 0.1);
}

.pillar-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pillar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    color: var(--color-white);
}

.pillar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.pillar-text {
    font-size: 0.9375rem;
    color: var(--color-secondary);
    line-height: 1.7;
}

/* =====================================================
   SERVICES SECTION
   ===================================================== */
.services {
    background: var(--color-light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--color-white);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid rgba(101, 122, 133, 0.1);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-card.expanded {
    grid-column: 1 / -1;
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(45, 74, 88, 0.08);
    border-radius: 0.75rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--color-primary);
    color: var(--color-white);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.service-desc {
    font-size: 0.9375rem;
    color: var(--color-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.service-expand {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-primary);
    padding: 0.5rem 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.service-expand:hover {
    color: var(--color-secondary);
}

.service-expand::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.service-expand:hover::after {
    transform: translateX(4px);
}

.service-card.expanded .service-expand::after {
    content: '←';
}

.service-details {
    display: none;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(101, 122, 133, 0.2);
}

.service-card.expanded .service-details {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.service-details-intro {
    font-size: 1rem;
    color: var(--color-dark);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-details h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.service-details ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.75rem;
}

.service-details li {
    font-size: 0.9375rem;
    color: var(--color-dark);
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.service-details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* =====================================================
   MARKETS SECTION
   ===================================================== */
.markets {
    background: var(--color-white);
}

.markets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.market-card {
    background: var(--color-white);
    border-radius: 0.75rem;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(45, 74, 88, 0.1);
    transition: all var(--transition-normal);
}

.market-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.market-flag {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.market-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.market-desc {
    font-size: 0.9375rem;
    color: var(--color-dark);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.market-focus-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.market-focus {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.market-focus li {
    font-size: 0.875rem;
    color: var(--color-secondary);
    padding-left: 1.25rem;
    position: relative;
}

.market-focus li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a3340 100%);
    text-align: center;
}

.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-white);
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    transition: all var(--transition-normal);
}

.contact-email:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background: var(--color-dark);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 280px;
}

.footer-logo {
    height: 40px;
    width: auto;
    margin-bottom: 1rem;
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--color-secondary);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a,
.footer-contact a {
    font-size: 0.875rem;
    color: var(--color-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--color-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
}

.copyright {
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.footer-lang {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-lang span {
    color: var(--color-secondary);
}

.footer-lang-btn {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-secondary);
    transition: color var(--transition-fast);
}

.footer-lang-btn:hover,
.footer-lang-btn.active {
    color: var(--color-white);
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

/* Tablet */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
        max-width: 100%;
        text-align: center;
    }
    
    .footer-logo {
        margin: 0 auto 1rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --nav-height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        padding: 2rem;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        color: var(--color-dark);
        font-size: 1.125rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .pillars {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card.expanded {
        grid-column: 1;
    }
    
    .service-details ul {
        grid-template-columns: 1fr;
    }
    
    .markets-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links ul {
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-content {
        padding: 1rem;
    }
    
    .pillar-card,
    .service-card,
    .market-card {
        padding: 1.5rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .contact-email {
        font-size: 1rem;
        padding: 0.875rem 1rem;
        word-break: break-all;
    }
}

/* Accessibility */
@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;
    }
}

/* Focus states */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .hero-scroll,
    .service-expand,
    .lang-toggle,
    .nav-toggle {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .section {
        padding: 2rem 0;
    }
}