/* =========================================
   BelQTech - Modern CSS Architecture
   Mobile-First Responsive Design
   ========================================= */

/* -----------------------------------------
   CSS Custom Properties (Variables)
   ----------------------------------------- */
:root {
    /* Primary Colors */
    --primary-green: #0dc966;
    --secondary-green: #00ff77;
    --accent-color: #0dc966;

    /* Neutral Colors */
    --primary-gray: #5c5e67;
    --secondary-gray: #afafaf;
    --text-color: #afafaf;
    --text-light: #ffffff;

    /* Background Colors */
    --dark-bg: #1a1a1a;
    --darker-bg: #121212;
    --card-bg: rgba(18, 18, 18, 0.8);

    /* Glass Effect */
    --glass-bg: rgba(18, 18, 18, 0.7);
    --glass-border: rgba(13, 201, 102, 0.1);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-green: 0 4px 20px rgba(13, 201, 102, 0.15);
    --shadow-green-hover: 0 8px 30px rgba(13, 201, 102, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;

    /* Z-Index Scale */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-overlay: 900;
    --z-modal: 1000;
    --z-toast: 1100;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Glacier', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Focus Styles for Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Skip to Content Link */
.skip-to-content {
    position: absolute;
    left: -9999px;
    top: var(--space-md);
    z-index: var(--z-toast);
    background: var(--primary-green);
    color: var(--darker-bg);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: left var(--transition-fast);
}

.skip-to-content:focus {
    left: var(--space-md);
}

/* -----------------------------------------
   Header & Navigation
   ----------------------------------------- */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: var(--z-sticky);
    padding: var(--space-md) 0;
    transition: transform var(--transition-base), background-color var(--transition-base);
    display: flex;
    justify-content: center;
    align-items: center;
}

.header.scroll-down {
    transform: translateY(-100%);
}

.header.scroll-up {
    transform: translateY(0);
    background-color: rgba(18, 18, 18, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-md);
}

.logo {
    margin-right: var(--space-xl);
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-image {
    height: 36px;
    width: auto;
    transition: transform var(--transition-base), filter var(--transition-base);
}

.logo-image:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    z-index: calc(var(--z-sticky) + 1);
    padding: var(--space-sm);
    background: none;
    border: none;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 4px 0;
    transition: all var(--transition-base);
    background-color: var(--secondary-gray);
    border-radius: 2px;
}

.hamburger:hover .bar {
    background-color: var(--primary-green);
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active .bar:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

/* Mobile Menu Overlay */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-overlay);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* Navigation Menu */
.nav-menu {
    position: fixed;
    left: -100%;
    top: 0;
    height: 100vh;
    width: 280px;
    max-width: 85vw;
    flex-direction: column;
    background-color: var(--darker-bg);
    padding: 5rem var(--space-xl) var(--space-xl);
    z-index: var(--z-sticky);
    transition: left var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    list-style: none;
    display: flex;
    gap: 0;
}

.nav-menu.active {
    left: 0;
}

.nav-menu li {
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(92, 94, 103, 0.2);
}

.nav-menu a {
    color: var(--secondary-gray);
    text-decoration: none;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--space-md) 0;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--primary-green);
    padding-left: var(--space-sm);
}

/* Desktop Navigation - 768px+ */
@media (min-width: 768px) {
    .hamburger {
        display: none;
    }

    .nav-overlay {
        display: none !important;
    }

    .nav-menu {
        position: static;
        flex-direction: row;
        height: auto;
        width: auto;
        max-width: none;
        background-color: transparent;
        padding: 0;
        box-shadow: none;
        gap: var(--space-lg);
        flex: 1;
        justify-content: flex-end;
        left: 0;
    }

    .nav-menu li {
        border-bottom: none;
        height: 40px;
    }

    .nav-menu a {
        padding: 0;
        font-size: 0.85rem;
        position: relative;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--primary-green);
        transition: width var(--transition-base);
    }

    .nav-menu a:hover::after,
    .nav-menu a:focus::after {
        width: 100%;
    }

    .nav-menu a:hover,
    .nav-menu a:focus {
        padding-left: 0;
    }
}

@media (min-width: 992px) {
    .nav-menu {
        gap: var(--space-xl);
    }

    .nav-menu a {
        font-size: 0.9rem;
    }

    .nav-container {
        padding: 0 var(--space-xl);
    }

    .logo-image {
        height: 40px;
    }
}

/* -----------------------------------------
   Hero Section
   ----------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--darker-bg);
    padding: var(--space-xl) var(--space-md);
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-base);
}

/* Hero Gradient Overlay */
.hero-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(18, 18, 18, 0.85) 0%,
        rgba(18, 18, 18, 0.6) 50%,
        rgba(13, 201, 102, 0.1) 100%
    );
    z-index: 2;
    pointer-events: none;
}

.hero-swiper {
    width: 100%;
    height: 100%;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: transform 8s ease-out;
}

.swiper-slide-active .hero-bg-image {
    transform: scale(1.05);
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: var(--space-xl);
}

/* Hero Content Animations */
.hero-content.animate-in .hero-logo {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-content.animate-in p {
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-content.animate-in .cta-button {
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

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

.hero-logo {
    width: 200px;
    max-width: 80%;
    height: auto;
    margin-bottom: var(--space-lg);
    object-fit: contain;
    filter: drop-shadow(0 4px 20px rgba(13, 201, 102, 0.3));
}

.hero-content h1 {
    font-size: clamp(2rem, 8vw, 4rem);
    color: var(--primary-green);
    margin-bottom: var(--space-md);
    text-shadow: 0 2px 20px rgba(13, 201, 102, 0.3);
}

.hero-content p {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-light);
    margin-bottom: var(--space-xl);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    background-color: var(--primary-green);
    color: var(--darker-bg);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-green);
    border: 2px solid transparent;
}

.cta-button:hover,
.cta-button:focus {
    background-color: var(--secondary-green);
    transform: translateY(-3px);
    box-shadow: var(--shadow-green-hover);
}

.cta-button:active {
    transform: translateY(-1px);
}

/* Hero Swiper Pagination */
.hero-swiper .swiper-pagination {
    bottom: 30px;
    position: absolute;
}

.hero-swiper .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background-color: var(--secondary-gray);
    opacity: 0.5;
    transition: all var(--transition-base);
}

.hero-swiper .swiper-pagination-bullet-active {
    background-color: var(--primary-green);
    opacity: 1;
    transform: scale(1.3);
}

/* Desktop Hero */
@media (min-width: 768px) {
    .hero {
        min-height: 80vh;
        padding: 0 var(--space-xl);
    }

    .hero-logo {
        width: 280px;
    }
}

@media (min-width: 992px) {
    .hero-logo {
        width: 300px;
    }
}

/* -----------------------------------------
   Sections - Common Styles
   ----------------------------------------- */
.section {
    padding: var(--space-2xl) var(--space-md);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    color: var(--primary-green);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: var(--space-xl);
    text-align: center;
    position: relative;
}

/* Section Reveal Animation */
.section.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (min-width: 768px) {
    .section {
        padding: var(--space-3xl) var(--space-xl);
    }
}

/* -----------------------------------------
   About Section
   ----------------------------------------- */
.about-text {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-md);
}

.about-text p {
    text-align: justify;
    line-height: 1.8;
    font-size: 1rem;
}

@media (min-width: 768px) {
    .about-text {
        padding: var(--space-xl);
    }

    .about-text p {
        font-size: 1.1rem;
    }
}

/* -----------------------------------------
   Services Grid & Cards
   ----------------------------------------- */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (min-width: 576px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xl);
    }
}

@media (min-width: 1200px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Centered grid variant for fewer items */
.services-grid--centered {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
}

.services-grid--centered .service-card {
    flex: 0 1 300px;
    max-width: 350px;
}

@media (min-width: 992px) {
    .services-grid--centered {
        gap: var(--space-xl);
    }
}

/* Service Card - Glass Morphism Effect */
.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    text-decoration: none;
    color: var(--text-color);
    cursor: pointer;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

/* Card hover glow effect */
.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle at center,
        rgba(13, 201, 102, 0.1) 0%,
        transparent 70%
    );
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.service-card:hover::before,
.service-card:focus::before {
    opacity: 1;
}

.service-card:hover,
.service-card:focus {
    transform: translateY(-5px) scale(1.02);
    border-color: rgba(13, 201, 102, 0.3);
    box-shadow: var(--shadow-green-hover);
}

.service-card:active {
    transform: translateY(-2px) scale(1.01);
}

.service-card i {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: var(--space-md);
    transition: all var(--transition-base);
    display: block;
}

.service-card:hover i,
.service-card:focus i {
    color: var(--secondary-green);
    transform: scale(1.1);
}

.service-card h3 {
    color: var(--text-light);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
    transition: color var(--transition-base);
}

.service-card:hover h3,
.service-card:focus h3 {
    color: var(--primary-green);
}

.service-card p {
    color: var(--text-color);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* No-hover variant for Partnership cards */
.service-card.no-hover {
    cursor: default;
}

.service-card.no-hover::before {
    display: none;
}

.service-card.no-hover:hover,
.service-card.no-hover:focus {
    transform: none;
    border-color: var(--glass-border);
    box-shadow: none;
}

.service-card.no-hover:hover i,
.service-card.no-hover:focus i {
    color: var(--primary-green);
    transform: none;
}

.service-card.no-hover:hover h3,
.service-card.no-hover:focus h3 {
    color: var(--text-light);
}

/* Staggered animation for cards */
.services-grid .service-card {
    opacity: 0;
    transform: translateY(20px);
}

.services-grid.animate .service-card {
    animation: cardFadeIn 0.5s ease forwards;
}

.services-grid.animate .service-card:nth-child(1) { animation-delay: 0.05s; }
.services-grid.animate .service-card:nth-child(2) { animation-delay: 0.1s; }
.services-grid.animate .service-card:nth-child(3) { animation-delay: 0.15s; }
.services-grid.animate .service-card:nth-child(4) { animation-delay: 0.2s; }
.services-grid.animate .service-card:nth-child(5) { animation-delay: 0.25s; }
.services-grid.animate .service-card:nth-child(6) { animation-delay: 0.3s; }
.services-grid.animate .service-card:nth-child(7) { animation-delay: 0.35s; }
.services-grid.animate .service-card:nth-child(8) { animation-delay: 0.4s; }

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Area Card (for carousel) */
.area-card {
    background-color: var(--darker-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    width: 100%;
    max-width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.area-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.area-card i {
    font-size: 2.5rem;
    color: var(--secondary-green);
    margin-bottom: var(--space-md);
}

.area-card h3 {
    color: var(--accent-color);
    margin: var(--space-sm) 0;
    font-size: 1.2rem;
}

.area-card p {
    color: var(--text-color);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* -----------------------------------------
   Modal Styles
   ----------------------------------------- */
.modal {
    position: fixed;
    z-index: var(--z-modal);
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.modal.active {
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--dark-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    position: relative;
    color: var(--text-color);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-slow);
    overflow: hidden;
}

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

.close-button {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    color: var(--secondary-gray);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: transparent;
    border: none;
    z-index: 10;
}

.close-button:hover,
.close-button:focus {
    color: var(--primary-green);
    background-color: rgba(13, 201, 102, 0.1);
    transform: rotate(90deg);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    max-height: calc(90vh - 100px);
    overflow-y: auto;
    padding-right: var(--space-sm);
}

.modal-image {
    width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.data-science-image {
    width: 60%;
    margin: 0 auto;
    display: block;
}

.modal-text {
    width: 100%;
}

.modal-text h3 {
    color: var(--primary-green);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.modal-text p {
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.modal-text ul {
    margin-top: var(--space-sm);
    padding-left: var(--space-lg);
}

.modal-text li {
    margin-bottom: var(--space-sm);
    color: var(--secondary-gray);
    line-height: 1.6;
}

/* Modal Scrollbar */
.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--darker-bg);
    border-radius: var(--radius-sm);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--primary-gray);
    border-radius: var(--radius-sm);
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--primary-green);
}

/* -----------------------------------------
   Contact Section
   ----------------------------------------- */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-info h3 {
    color: var(--text-light);
    margin-bottom: var(--space-md);
}

.contact-info p {
    margin-bottom: var(--space-sm);
}

.email-link {
    color: var(--primary-green);
    text-decoration: none;
    transition: all var(--transition-fast);
    display: inline-block;
}

.email-link:hover,
.email-link:focus {
    color: var(--secondary-green);
    text-decoration: underline;
}

.whatsapp-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background-color: var(--primary-green);
    color: var(--darker-bg);
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-top: var(--space-xl);
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-green);
}

.whatsapp-link:hover,
.whatsapp-link:focus {
    background-color: var(--secondary-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-green-hover);
}

/* -----------------------------------------
   Footer
   ----------------------------------------- */
.footer {
    background-color: var(--darker-bg);
    padding: var(--space-2xl) var(--space-md) var(--space-md);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
}

@media (min-width: 576px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        text-align: left;
    }
}

.footer-section h3 {
    color: var(--primary-green);
    margin-bottom: var(--space-md);
}

.social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
    justify-content: center;
}

@media (min-width: 576px) {
    .social-links {
        justify-content: flex-start;
    }
}

.social-link {
    color: var(--secondary-gray);
    font-size: 1.5rem;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: rgba(92, 94, 103, 0.1);
}

.social-link:hover,
.social-link:focus {
    color: var(--primary-green);
    background: rgba(13, 201, 102, 0.1);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(92, 94, 103, 0.3);
}

.footer-bottom p {
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

/* -----------------------------------------
   Floating Buttons
   ----------------------------------------- */
.whatsapp-button {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background-color: var(--primary-green);
    color: var(--darker-bg);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.75rem;
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-green);
}

.whatsapp-button:hover,
.whatsapp-button:focus {
    background-color: var(--secondary-green);
    transform: scale(1.1);
    box-shadow: var(--shadow-green-hover);
}

.whatsapp-button:active {
    transform: scale(0.95);
}

.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    left: var(--space-lg);
    background-color: var(--primary-gray);
    color: var(--darker-bg);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus {
    background-color: var(--secondary-gray);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.back-to-top:active {
    transform: translateY(0);
}

/* Mobile adjustments for floating buttons */
@media (max-width: 576px) {
    .whatsapp-button {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        bottom: var(--space-md);
        right: var(--space-md);
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        bottom: var(--space-md);
        left: var(--space-md);
    }
}

/* -----------------------------------------
   Swiper Generic Styles
   ----------------------------------------- */
.swiper-container {
    width: 100%;
    padding: var(--space-2xl) 0;
}

.swiper-slide {
    display: flex;
    justify-content: center;
    align-items: center;
}

.swiper-pagination {
    position: relative;
    margin-top: var(--space-lg);
}

.swiper-pagination-bullet {
    background-color: var(--accent-color);
    opacity: 0.5;
    transition: all var(--transition-base);
}

.swiper-pagination-bullet-active {
    opacity: 1;
}

/* -----------------------------------------
   Testimonials (Future use)
   ----------------------------------------- */
.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

@media (min-width: 768px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.testimonial-card {
    background-color: var(--darker-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.testimonial-card cite {
    color: var(--primary-green);
    font-style: normal;
    margin-top: var(--space-md);
    display: block;
}

/* -----------------------------------------
   Partners Grid (Future use)
   ----------------------------------------- */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (min-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.partner-logo {
    background-color: var(--darker-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--primary-gray);
    transition: all var(--transition-base);
}

.partner-logo:hover {
    background-color: var(--dark-bg);
    color: var(--text-color);
}

/* -----------------------------------------
   404 Error Page
   ----------------------------------------- */
.error-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-xl);
}

.error-content {
    max-width: 600px;
    margin: 0 auto;
}

.error-content h1 {
    font-size: clamp(6rem, 20vw, 10rem);
    color: var(--primary-green);
    margin: 0;
    line-height: 1;
    text-shadow: 0 4px 30px rgba(13, 201, 102, 0.3);
}

.error-content h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--text-light);
    margin: var(--space-md) 0;
}

.error-content p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: var(--space-xl);
}

.error-content .cta-button {
    display: inline-block;
}

/* -----------------------------------------
   Utilities
   ----------------------------------------- */
.text-center {
    text-align: center;
}

.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;
}

/* Reduce motion for users who prefer it */
@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;
    }
}