/* ===== CSS Variables - Modern Color Palette ===== */
:root {
    /* Primary Colors - Modern Blue/Indigo */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;

    /* Neutral Colors */
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #1e293b;
    --gray-800: #334155;
    --gray-700: #475569;
    --gray-600: #64748b;
    --gray-500: #94a3b8;
    --gray-400: #cbd5e1;
    --gray-300: #e2e8f0;
    --gray-200: #f1f5f9;
    --gray-100: #f8fafc;
    --white: #ffffff;

    /* Accent Colors */
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --success: #10b981;
    --warning: #f59e0b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Spacing */
    --container-width: 1200px;
    --section-padding: 100px;

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* Border Radius */
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--dark);
    font-weight: 700;
    line-height: 1.2;
}

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

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

ul {
    list-style: none;
}

/* ===== Utility Classes ===== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding) 0;
}

.section-header {
    margin-bottom: 60px;
}

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 600px;
}

.section-header.centered .section-subtitle {
    margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

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

/* Hero section outline button - white text for visibility */
.hero .btn-outline {
    color: var(--white);
    border-color: var(--white);
}

.hero .btn-outline:hover {
    background: var(--white);
    color: var(--dark);
}

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

.btn-white:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary);
    background: var(--gray-100);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(6, 182, 212, 0.3) 0%, transparent 50%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(40px, 8vw, 72px);
    color: var(--white);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(18px, 2.5vw, 22px);
    color: var(--gray-400);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== About Section ===== */
.about {
    background: var(--gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .lead {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 20px;
    font-weight: 500;
}

.about-text p {
    margin-bottom: 16px;
}

.stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--gray-300);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
    margin-top: 8px;
}

.about-image {
    position: relative;
}

/* ===== Image Slider ===== */
.slider {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--gray-200);
}

.slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.slide.active {
    opacity: 1;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    z-index: 10;
}

.slider-btn:hover {
    background: var(--white);
    transform: translateY(-50%) scale(1.1);
}

.slider-btn.prev {
    left: 12px;
}

.slider-btn.next {
    right: 12px;
}

.slider-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.slider-dot {
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.slider-dot.active,
.slider-dot:hover {
    background: white;
}

/* ===== Features Section ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 15px;
}

/* ===== CTA Section ===== */
.cta {
    background: var(--gradient-primary);
    padding: 80px 0;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-size: clamp(28px, 4vw, 40px);
    color: var(--white);
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

/* ===== Contact Section ===== */
.contact {
    background: var(--gray-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    color: var(--white);
}

.contact-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--gray-600);
    font-size: 15px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    font-size: 15px;
    font-family: inherit;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--gray-100);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
}

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

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: var(--gray-400);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--gray-800);
}

.footer-brand .nav-logo {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-brand p {
    max-width: 300px;
    font-size: 15px;
    line-height: 1.7;
}

.footer-links h4,
.footer-social h4,
.footer-contact h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-links a {
    font-size: 15px;
    transition: var(--transition-fast);
}

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

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 15px;
    line-height: 1.6;
}

.social-icons {
    display: flex;
    gap: 16px;
}

.social-icons a {
    width: 44px;
    height: 44px;
    background: var(--gray-800);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.social-icons svg {
    color: var(--gray-400);
}

.social-icons a:hover svg {
    color: var(--white);
}

.footer-bottom {
    padding: 30px 0;
    text-align: center;
    font-size: 14px;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        order: -1;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }

    .stats {
        flex-wrap: wrap;
        gap: 30px;
        justify-content: center;
    }

    .stat {
        min-width: 100px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .footer-brand p {
        margin: 0 auto;
    }

    .social-icons {
        justify-content: center;
    }

    .contact-form {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .feature-card {
        padding: 30px 24px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}