/*=============================================
    CSS Variables & Root Configuration
=============================================*/
:root {
    /* Colors - Modern Professional Palette */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-dark: #0c0a1d;
    
    /* Semantic Colors */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-glow: 0 0 40px rgb(99 102 241 / 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Header */
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 0;
}

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

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

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

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

/* Reduce Motion */
@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;
    }
}

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

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

.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;
}

/*=============================================
    Buttons
=============================================*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 2rem;
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    text-decoration: none;
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--outline {
    background: transparent;
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.05);
}

.btn--small {
    padding: 0.5rem 1.25rem;
    font-size: var(--font-size-sm);
}

.btn--full {
    width: 100%;
}

.btn .btn-loading {
    display: none;
}

.btn.is-loading .btn-text {
    opacity: 0;
}

.btn.is-loading .btn-loading {
    display: block;
    position: absolute;
}

.btn.is-loading {
    position: relative;
}

/*=============================================
    Header & Navigation
=============================================*/
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--color-gray-100);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav__link {
    position: relative;
    font-weight: 500;
    color: var(--color-gray-600);
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

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

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle,
.nav__close {
    display: none;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: inherit;
    transition: transform var(--transition-base);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

/*=============================================
    Hero Section
=============================================*/
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: var(--gradient-light);
    overflow: hidden;
}

.hero__particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero__badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xl);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    max-width: 540px;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-3xl);
}

.stat {
    text-align: left;
}

.stat__number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.hero__visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__image-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
}

.hero__shape {
    position: absolute;
    inset: 10%;
    background: var(--gradient-primary);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite;
    opacity: 0.9;
}

@keyframes morph {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    25% {
        border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
    }
    50% {
        border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
    }
    75% {
        border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
    }
}

.hero__floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: float 3s ease-in-out infinite;
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 600;
    color: var(--color-gray-800);
    white-space: nowrap;
}

.card-1 {
    top: 10%;
    right: 0;
    animation-delay: 0s;
}

.card-2 {
    bottom: 30%;
    left: -10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 10%;
    right: 5%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    animation: scroll 1.5s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(12px);
    }
}

/* Particle animation */
.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: particle-float 15s infinite linear;
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/*=============================================
    Section Styles
=============================================*/
.section {
    padding: var(--spacing-4xl) 0;
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section__subtitle {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.section__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
}

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

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about__subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.about__text {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.about__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.feature {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.feature__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
}

.feature__content h4 {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.feature__content p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.about__visual {
    position: relative;
}

.about__image-wrapper {
    position: relative;
}

.about__image {
    background: var(--gradient-dark);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-2xl);
}

.about__code-block {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-header {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.about__code-block pre {
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.about__code-block code {
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: var(--font-size-sm);
    color: #e2e8f0;
    line-height: 1.8;
}

.keyword { color: #c792ea; }
.variable { color: #82aaff; }
.function { color: #82aaff; }
.property { color: #f78c6c; }
.string { color: #c3e88d; }

.about__experience-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 140px;
    height: 140px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    box-shadow: var(--shadow-xl);
    animation: pulse 2s ease-in-out infinite;
}

.badge-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    line-height: 1;
}

.badge-text {
    font-size: var(--font-size-xs);
    text-align: center;
    line-height: 1.2;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/*=============================================
    Services Section
=============================================*/
.services {
    background: var(--color-gray-50);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.service-card__icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    transition: all var(--transition-base);
}

.service-card:hover .service-card__icon {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.service-card__description {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-lg);
}

.service-card__features {
    margin-bottom: var(--spacing-xl);
}

.service-card__features li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

.service-card__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

.service-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-primary);
    transition: gap var(--transition-base);
}

.service-card__link:hover {
    gap: var(--spacing-md);
}

/*=============================================
    Portfolio Section
=============================================*/
.portfolio {
    background: var(--color-white);
}

.portfolio__filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-xl);
    font-weight: 500;
    color: var(--color-gray-500);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
}

.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.portfolio-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.portfolio-card__image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-card__overlay {
    position: absolute;
    inset: 0;
    background: rgba(12, 10, 29, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
    padding: var(--spacing-xl);
    text-align: center;
}

.portfolio-card:hover .portfolio-card__overlay {
    opacity: 1;
}

.portfolio-card__overlay h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.portfolio-card__overlay p {
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-lg);
}

.portfolio-card__overlay .btn--small {
    background: var(--color-white);
    color: var(--color-gray-900);
}

.portfolio-card__overlay .btn--small:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/*=============================================
    Testimonials Section
=============================================*/
.testimonials {
    background: var(--gradient-dark);
    color: var(--color-white);
}

.testimonials .section__subtitle {
    color: var(--color-primary-light);
}

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

.testimonials .section__description {
    color: var(--color-gray-300);
}

.testimonials__slider {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonials__track {
    display: flex;
    transition: transform var(--transition-slow);
}

.testimonial-card {
    flex: 0 0 100%;
    padding: 0 var(--spacing-xl);
}

.testimonial-card__stars {
    display: flex;
    gap: 4px;
    color: #fbbf24;
    margin-bottom: var(--spacing-xl);
}

.testimonial-card__text {
    font-size: var(--font-size-xl);
    line-height: 1.8;
    color: var(--color-gray-100);
    margin-bottom: var(--spacing-2xl);
    font-style: italic;
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-light);
}

.author-info h4 {
    font-weight: 600;
    color: var(--color-white);
}

.author-info p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

.testimonials__controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.testimonial-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    transition: all var(--transition-base);
}

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

.testimonials__dots {
    display: flex;
    gap: var(--spacing-sm);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.dot.active {
    background: var(--color-primary);
    transform: scale(1.2);
}

/*=============================================
    FAQ Section
=============================================*/
.faq {
    background: var(--color-gray-50);
}

.faq__grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-primary-light);
}

.faq-item.active {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.faq-item__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl);
    font-weight: 600;
    color: var(--color-gray-900);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-item__question:hover {
    color: var(--color-primary);
}

.faq-item__icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-item__icon {
    transform: rotate(180deg);
}

.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-item__answer {
    max-height: 300px;
}

.faq-item__answer p {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    color: var(--color-gray-600);
}

.faq-cta-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-white);
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-xl));
}

.faq-cta-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.faq-cta-card p {
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.faq-cta-card .btn {
    background: var(--color-white);
    color: var(--color-primary);
}

.faq-cta-card .btn:hover {
    background: var(--color-gray-100);
}

/*=============================================
    Contact Section
=============================================*/
.contact {
    background: var(--color-white);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
}

.contact-info-card {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

.contact-info-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
}

.contact-info-card__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
}

.contact-info-card__content h4 {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.contact-info-card__content p {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.contact-info-card__content a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.contact-info-card__content a:hover {
    color: var(--color-primary-dark);
}

.contact__map {
    margin-top: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 200px;
    background: var(--color-gray-100);
    position: relative;
}

.contact__map iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.map-link {
    position: absolute;
    right: var(--spacing-md);
    bottom: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: all var(--transition-fast);
}

.map-link:hover {
    color: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Contact Form */
.contact__form-wrapper {
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-group {
    position: relative;
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-label span {
    color: var(--color-error);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    color: var(--color-gray-900);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input.error {
    border-color: var(--color-error);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
    padding-right: 3rem;
}

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

.form-error {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-error);
    margin-top: var(--spacing-xs);
    min-height: 1.25rem;
}

.form-char-count {
    display: block;
    text-align: right;
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    margin-top: var(--spacing-xs);
}

/* Checkbox */
.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.form-checkbox input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkmark {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.form-checkbox input:checked + .checkmark {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-checkbox input:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.form-checkbox a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Form Success Message */
.form-message {
    display: none;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.form-message.show {
    display: block;
}

.form-message--error {
    color: #991b1b;
    background: #fee2e2;
    border: 1px solid #fecaca;
}

.form-message--success {
    color: #166534;
    background: #dcfce7;
    border: 1px solid #bbf7d0;
}

.form-success {
    display: none;
    text-align: center;
    padding: var(--spacing-3xl);
}

.form-success.show {
    display: block;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-xl);
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scale-in 0.5s ease;
}

@keyframes scale-in {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

.form-success h3 {
    font-size: var(--font-size-2xl);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.form-success p {
    color: var(--color-gray-500);
}

/*=============================================
    Footer
=============================================*/
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-4xl) 0 0;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
}

.footer__description {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.footer__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-xl);
}

.footer__list li {
    margin-bottom: var(--spacing-md);
}

.footer__list a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) 0;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/*=============================================
    Back to Top Button
=============================================*/
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-sticky);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/*=============================================
    WhatsApp Button
=============================================*/
.whatsapp-btn {
    position: fixed;
    bottom: var(--spacing-xl);
    left: var(--spacing-xl);
    min-height: 60px;
    background: #25d366;
    color: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-lg);
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
    animation: whatsapp-pulse 2s infinite;
    white-space: nowrap;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

@keyframes whatsapp-pulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(37, 211, 102, 0.6);
    }
}

.whatsapp-text {
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

/*=============================================
    Animations
=============================================*/
.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

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

.animate-fade-in:nth-child(1) { animation-delay: 0.1s; }
.animate-fade-in:nth-child(2) { animation-delay: 0.2s; }
.animate-fade-in:nth-child(3) { animation-delay: 0.3s; }
.animate-fade-in:nth-child(4) { animation-delay: 0.4s; }
.animate-fade-in:nth-child(5) { animation-delay: 0.5s; }

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

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

/*=============================================
    Responsive Design
=============================================*/

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
    :root {
        --spacing-4xl: 4rem;
    }
    
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-3xl);
    }
    
    .hero__description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__buttons {
        justify-content: center;
    }
    
    .hero__stats {
        justify-content: center;
    }
    
    .hero__visual {
        display: none;
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }
    
    .about__visual {
        order: -1;
    }
    
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .faq__grid {
        grid-template-columns: 1fr;
    }
    
    .faq__cta {
        order: -1;
    }
    
    .faq-cta-card {
        position: static;
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
        --container-padding: 1rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--header-height) + var(--spacing-xl)) var(--spacing-xl);
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
        transition: right var(--transition-base);
        z-index: var(--z-modal);
    }
    
    .nav__menu.active {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
        width: 100%;
    }
    
    .nav__link {
        font-size: var(--font-size-lg);
    }
    
    .nav__toggle {
        display: block;
    }
    
    .nav__close {
        display: block;
        position: absolute;
        top: var(--spacing-xl);
        right: var(--spacing-xl);
        color: var(--color-gray-600);
    }
    
    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-3xl);
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__buttons {
        flex-direction: column;
    }

    .hero__buttons .btn {
        width: 100%;
    }
    
    .hero__stats {
        flex-direction: column;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .stat {
        text-align: center;
    }
    
    .hero__scroll {
        display: none;
    }
    
    .services__grid,
    .portfolio__grid {
        grid-template-columns: 1fr;
    }

    .contact__grid,
    .contact__info,
    .contact__form-wrapper,
    .contact-form {
        min-width: 0;
    }

    .contact-info-card {
        align-items: flex-start;
    }

    .contact-info-card__content {
        min-width: 0;
    }

    .contact-info-card__content p,
    .contact-info-card__content a {
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .contact__map {
        height: 260px;
    }

    .map-link {
        max-width: calc(100% - 2rem);
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-input,
    .form-textarea,
    .form-select {
        max-width: 100%;
    }

    .form-checkbox {
        gap: var(--spacing-sm);
    }

    .form-checkbox span:last-child {
        min-width: 0;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .whatsapp-btn {
        min-height: 50px;
        padding: 0 var(--spacing-md);
        bottom: var(--spacing-lg);
        left: var(--spacing-lg);
        max-width: calc(100vw - 2rem);
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
    }
    
    .testimonial-card {
        padding: 0;
    }
    
    .testimonial-card__text {
        font-size: var(--font-size-lg);
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .hero__description,
    .section__description {
        font-size: var(--font-size-base);
    }
    
    .section__title {
        font-size: var(--font-size-2xl);
    }

    .section {
        padding: var(--spacing-3xl) 0;
    }
    
    .about__experience-badge {
        width: 100px;
        height: 100px;
        bottom: -20px;
        right: -10px;
    }
    
    .badge-number {
        font-size: var(--font-size-2xl);
    }
    
    .service-card {
        padding: var(--spacing-xl);
    }
    
    .contact__form-wrapper {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }

    .contact-info-card {
        padding: var(--spacing-lg);
    }

    .contact__map {
        height: 220px;
    }

    .btn {
        width: 100%;
        min-height: 48px;
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .whatsapp-btn {
        width: auto;
        max-width: calc(100vw - 2rem);
    }
}

@media (max-width: 360px) {
    :root {
        --container-padding: 0.875rem;
    }

    .contact__form-wrapper,
    .service-card,
    .contact-info-card {
        padding: var(--spacing-md);
    }

    .whatsapp-text {
        display: none;
    }

    .whatsapp-btn {
        width: 52px;
        height: 52px;
        padding: 0;
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    .header,
    .whatsapp-btn,
    .back-to-top,
    .hero__scroll {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    .hero {
        min-height: auto;
        padding: 20px 0;
    }
    
    .section {
        padding: 20px 0;
        page-break-inside: avoid;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}
/*=============================================
    Theme Toggle & Dark Mode
=============================================*/
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    background: var(--color-white);
    color: var(--color-gray-700);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

.theme-toggle__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle__icon--sun {
    display: none;
}

body.dark-mode {
    --gradient-light: linear-gradient(135deg, #111827 0%, #1e293b 100%);
    --color-white: #0f172a;
    --color-gray-50: #111827;
    --color-gray-100: #1e293b;
    --color-gray-200: #334155;
    --color-gray-300: #475569;
    --color-gray-400: #94a3b8;
    --color-gray-500: #cbd5e1;
    --color-gray-600: #d1d5db;
    --color-gray-700: #e2e8f0;
    --color-gray-800: #f1f5f9;
    --color-gray-900: #f8fafc;
    background-color: var(--color-white);
}

body.dark-mode .header {
    background: rgba(15, 23, 42, 0.92);
}

body.dark-mode .theme-toggle {
    background: var(--color-gray-100);
    border-color: var(--color-gray-200);
    color: var(--color-gray-900);
}

body.dark-mode .theme-toggle__icon--sun {
    display: inline-flex;
}

body.dark-mode .theme-toggle__icon--moon {
    display: none;
}


body.dark-mode .testimonials {
    color: #f8fafc;
}

body.dark-mode .testimonials .section__title,
body.dark-mode .author-info h4,
body.dark-mode .testimonial-btn {
    color: #f8fafc;
}

body.dark-mode .testimonials .section__description,
body.dark-mode .testimonial-card__text {
    color: #dbeafe;
}

body.dark-mode .author-info p {
    color: #d1d5db;
}

body.dark-mode .author-avatar {
    background: rgba(255, 255, 255, 0.14);
    color: #a5b4fc;
}

.form-honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}
body.dark-mode .hero__badge,
body.dark-mode .filter-btn,
body.dark-mode .form-input,
body.dark-mode .testimonial-btn {
    background: var(--color-gray-100);
}

body.dark-mode .services,
body.dark-mode .portfolio {
    background: var(--color-gray-50);
}

body.dark-mode .section__subtitle,
body.dark-mode .service-card__link,
body.dark-mode .filter-btn.active {
    color: var(--color-primary-light);
}

body.dark-mode .service-card__description,
body.dark-mode .service-card__features li,
body.dark-mode .section__description,
body.dark-mode .portfolio-card__overlay p {
    color: #e2e8f0;
}

body.dark-mode .portfolio-card__overlay {
    background: rgba(2, 6, 23, 0.94);
}

body.dark-mode .portfolio-card__overlay .btn--small {
    background: #f8fafc;
    color: #0f172a;
}

body.dark-mode .map-link {
    background: var(--color-gray-100);
    color: var(--color-primary-light);
}

body.dark-mode .hero__floating-card,
body.dark-mode .service-card,
body.dark-mode .portfolio-card,
body.dark-mode .testimonial-card,
body.dark-mode .faq-item,
body.dark-mode .contact-info-card,
body.dark-mode .contact__form-wrapper {
    box-shadow: 0 18px 45px rgb(0 0 0 / 0.28);
}

body.dark-mode .hamburger,
body.dark-mode .hamburger::before,
body.dark-mode .hamburger::after {
    background: var(--color-gray-900);
}