/* ===== CSS Variables & Reset ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #8b5cf6;
    --dark: #0f172a;
    --dark-lighter: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(180deg, var(--dark) 0%, var(--dark-lighter) 100%);
    --shadow-sm: 0 1px 2px 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);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.3s ease;
}

*, *::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(--dark);
    background: var(--white);
    overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

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

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.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-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-nav {
    padding: 0.5rem 1rem;
}

.btn-full {
    width: 100%;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    font-size: 0.9375rem;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.neural-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 15s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: var(--secondary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: 0 1.5rem;
}

.hero-title {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--gray-light);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-light);
    font-size: 0.875rem;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--gray-light);
    border-bottom: 2px solid var(--gray-light);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--gray);
    font-size: 1.125rem;
}

/* ===== Services Section ===== */
.services {
    padding: 8rem 0;
    background: var(--dark);
    position: relative;
    overflow: hidden;
}

.services::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
}

.services .container {
    position: relative;
    z-index: 1;
}

.services .section-header {
    margin-bottom: 4rem;
}

.services .section-tag {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

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

.services .section-subtitle {
    color: var(--gray-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    max-width: 1100px;
    margin: 0 auto;
}

.service-card {
    background: var(--dark-lighter);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.2);
}

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

.service-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

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

.service-card h3 {
    margin-bottom: 0.5rem;
    color: var(--white);
    font-size: 1.0625rem;
}

.service-card > p {
    color: var(--gray-light);
    margin-bottom: 1rem;
    line-height: 1.5;
    font-size: 0.8125rem;
}

.service-features {
    list-style: none;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.service-features li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.375rem;
    color: var(--gray-light);
    font-size: 0.8125rem;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.45rem;
    width: 5px;
    height: 5px;
    background: var(--primary);
    border-radius: 50%;
}

/* ===== About Section ===== */
.about {
    padding: 8rem 0;
    background: var(--dark-lighter);
    position: relative;
}

.about::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.about .container {
    position: relative;
    z-index: 1;
}

.about .section-tag {
    background: rgba(99, 102, 241, 0.15);
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content .section-tag {
    margin-bottom: 1rem;
}

.about-content .section-title {
    margin-bottom: 1.5rem;
}

.about-text {
    color: var(--gray-light);
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.about-feature {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.about-feature:hover {
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateX(4px);
}

.feature-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
}

.feature-content h4 {
    margin-bottom: 0.25rem;
    color: var(--white);
    font-size: 1rem;
}

.feature-content p {
    color: var(--gray-light);
    font-size: 0.875rem;
    line-height: 1.5;
}

.about-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 0.75rem;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--gray-light);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* ===== Contact Section ===== */
.contact {
    padding: 6rem 0;
    background: var(--dark);
    position: relative;
}

.contact::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.contact .container {
    position: relative;
    z-index: 1;
}

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

.contact-centered .section-tag {
    margin-bottom: 1rem;
    background: rgba(99, 102, 241, 0.15);
}

.contact-centered .section-title {
    margin-bottom: 1rem;
    color: var(--white);
}

.contact-text {
    color: var(--gray-light);
    font-size: 1rem;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--gray-light);
    padding: 0.875rem 1.25rem;
    background: var(--dark-lighter);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    font-size: 0.9375rem;
}

.contact-link:hover {
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--white);
}

.contact-link svg {
    width: 18px;
    height: 18px;
    color: var(--primary-light);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-lighter);
    color: var(--white);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--gray-light);
    margin-top: 1rem;
    max-width: 320px;
    line-height: 1.7;
}

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

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-light);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.875rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 700px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-visual {
        order: -1;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--dark);
        flex-direction: column;
        justify-content: center;
        padding: 2rem;
        transition: var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        margin: 1rem 0;
    }

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

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

    .services-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .stat-grid {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .services,
    .about,
    .contact {
        padding: 4rem 0;
    }

    .service-card,
    .contact-form {
        padding: 1.5rem;
    }

    .visual-card {
        padding: 2rem;
    }
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Form Success State ===== */
.form-success {
    text-align: center;
    padding: 2rem;
}

.form-success h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

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