/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-6);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    /* Dark Mode Colors */
    --white: #0f172a;
    --gray-50: #1e293b;
    --gray-100: #334155;
    --gray-200: #475569;
    --gray-300: #64748b;
    --gray-400: #94a3b8;
    --gray-500: #cbd5e1;
    --gray-600: #e2e8f0;
    --gray-700: #f1f5f9;
    --gray-800: #f8fafc;
    --gray-900: #ffffff;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Utilities */
.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background: var(--white);
    color: var(--gray-700);
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

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

.btn--large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn__icon {
    font-size: 1.2em;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.nav__data {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    flex: 1;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5em;
}

.nav__controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.nav__controls--mobile {
    display: none;
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--gray-200);
    justify-content: center;
}

.language-selector {
    display: flex;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 2px;
}

.language-btn {
    background: transparent;
    border: none;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.language-btn.active,
.language-btn:hover {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.theme-toggle {
    background: var(--gray-100);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--gray-200);
    transform: scale(1.05);
}

.theme-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(20deg);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-2);
}

.nav__burger {
    width: 24px;
    height: 2px;
    background-color: var(--gray-700);
    transition: all var(--transition-base);
}

.nav__menu {
    display: flex;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
    list-style: none;
}

.nav__link {
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    transition: color var(--transition-base);
    position: relative;
}

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

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

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

.nav__cta {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
}

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

.nav__cta::after {
    display: none;
}

/* Hero Section */
.hero {
    padding: calc(4rem + var(--spacing-24)) 0 var(--spacing-24);
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    z-index: -1;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.hero__content {
    animation: fadeInUp 0.8s ease-out;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
    color: var(--gray-900);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
    height: 400px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero__floating-card {
    position: absolute;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 20%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 30%;
    animation-delay: 2s;
}

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

.card-text {
    font-weight: 600;
    color: var(--gray-700);
}

/* Section Styles */
.section__header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: var(--spacing-24) 0;
    background: var(--white);
}

.about__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.about__text p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.about__stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

.stat {
    text-align: center;
    padding: var(--spacing-6);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
}

.stat__number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-2);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Services Section */
.services {
    padding: var(--spacing-24) 0;
    background: var(--gray-50);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.service__card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

.service__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
}

.service__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-3);
}

.service__description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.service__features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.feature {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Purpose Section */
.purpose {
    padding: var(--spacing-24) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.purpose__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.purpose__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.purpose__icon {
    font-size: 1.2em;
}

.purpose__description {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    opacity: 0.9;
}

.purpose__visual {
    position: relative;
    height: 300px;
}

.purpose__circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: pulse 2s ease-in-out infinite;
}

.circle-1 {
    width: 120px;
    height: 120px;
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.circle-2 {
    width: 80px;
    height: 80px;
    top: 60%;
    right: 30%;
    animation-delay: 0.5s;
}

.circle-3 {
    width: 100px;
    height: 100px;
    bottom: 10%;
    left: 50%;
    animation-delay: 1s;
}

/* CTA Section */
.cta {
    padding: var(--spacing-24) 0;
    background: var(--gray-50);
    text-align: center;
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
}

.cta__icon {
    font-size: 1.2em;
}

.cta__description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__content {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.footer__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

.footer__description {
    color: var(--gray-400);
    max-width: 400px;
    margin: 0 auto;
}

.footer__bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--spacing-8);
    text-align: center;
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.2;
    }
}

/* Responsive Design */
@media screen and (max-width: 1024px) {
    .hero__container,
    .about__content,
    .purpose__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .hero__image {
        order: -1;
        height: 300px;
    }
    
    .services__grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media screen and (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-4);
    }
    
    .nav__data {
        justify-content: space-between;
        width: 100%;
    }
    
    .nav__controls {
        display: none;
    }
    
    .nav__controls--mobile {
        display: flex;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 4rem;
        left: -100%;
        width: 100%;
        height: calc(100vh - 4rem);
        background: var(--white);
        transition: left var(--transition-base);
        border-top: 1px solid var(--gray-200);
    }
    
    .nav__menu.show-menu {
        left: 0;
    }
    
    .nav__list {
        flex-direction: column;
        padding: var(--spacing-6);
        gap: var(--spacing-4);
    }
    
    .nav__link {
        padding: var(--spacing-3) 0;
        width: 100%;
    }
    
    .hero {
        padding: calc(4rem + var(--spacing-16)) 0 var(--spacing-16);
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero__image {
        height: 250px;
    }
    
    .hero__floating-card {
        padding: var(--spacing-3);
        font-size: var(--font-size-sm);
    }
    
    .section__title {
        font-size: var(--font-size-3xl);
    }
    
    .about__stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .stat {
        flex: 1;
        padding: var(--spacing-4);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .service__card {
        padding: var(--spacing-6);
    }
    
    .purpose__title,
    .cta__title {
        font-size: var(--font-size-3xl);
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .purpose__visual {
        height: 200px;
    }
    
    .cta__buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .purpose,
    .cta {
        padding: var(--spacing-16) 0;
    }
}

@media screen and (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .section__title {
        font-size: var(--font-size-2xl);
    }
    
    .about__stats {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .purpose__title,
    .cta__title {
        font-size: var(--font-size-2xl);
    }
}