/* ===================================
   MANTRA GEEKS - BMW-INSPIRED DESIGN
   Premium Software Development
   =================================== */

:root {
    /* BMW-Inspired Color Palette */
    --primary: #1a1a1a;
    --secondary: #0066b1;
    --accent: #00d4ff;
    --dark: #0a0a0a;
    --light: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0066b1 0%, #00d4ff 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(10, 10, 10, 0.9) 0%, rgba(10, 10, 10, 0.7) 100%);

    /* Spacing */
    --section-padding: 120px 0;
    --container-padding: 0 80px;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--light);
    color: var(--primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ===================================
   NAVIGATION
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.5px;
}

.logo-text {
    color: var(--primary);
}

.logo-accent {
    color: var(--secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 48px;
    margin: 0;
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--secondary);
}

.nav-link:hover::after {
    width: 100%;
}

.cta-button {
    background: var(--primary);
    color: var(--light);
    border: none;
    padding: 12px 32px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
}

.cta-button:hover {
    background: var(--secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 28px;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-base);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 140px 80px 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
    z-index: -1;
}

.gradient-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 102, 177, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

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

.hero-content {
    max-width: 1400px;
    width: 100%;
    z-index: 1;
}

.hero-text {
    max-width: 800px;
}

.hero-label {
    display: inline-block;
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-size: 80px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--light);
    margin-bottom: 32px;
    letter-spacing: -2px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-300);
    line-height: 1.8;
    margin-bottom: 48px;
    max-width: 600px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-buttons {
    display: flex;
    gap: 24px;
    margin-bottom: 80px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.btn-primary,
.btn-secondary {
    padding: 18px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light);
    box-shadow: 0 4px 16px rgba(0, 102, 177, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 102, 177, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--light);
    border: 2px solid var(--light);
}

.btn-secondary:hover {
    background: var(--light);
    color: var(--primary);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    gap: 80px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.stat-item {
    flex: 1;
}

.stat-number {
    font-size: 56px;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 8px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--gray-400);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1s forwards;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    transform: rotate(-45deg);
    animation: bounce 2s infinite;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: rotate(-45deg) translateY(0); }
    40% { transform: rotate(-45deg) translateY(-10px); }
    60% { transform: rotate(-45deg) translateY(-5px); }
}

/* ===================================
   SECTION HEADERS
   =================================== */

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    color: var(--secondary);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   SERVICES SECTION
   =================================== */

.services {
    padding: var(--section-padding);
    background: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--light);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    padding: 48px 40px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover::before {
    transform: scaleX(1);
}

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

.service-card.featured {
    background: var(--gradient-dark);
    border: none;
    color: var(--light);
}

.featured-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--accent);
    color: var(--dark);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    color: var(--secondary);
    transition: all var(--transition-base);
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-icon svg {
    width: 32px;
    height: 32px;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--primary);
}

.service-card.featured .service-title {
    color: var(--light);
}

.service-description {
    font-size: 16px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-card.featured .service-description {
    color: var(--gray-300);
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    color: var(--gray-600);
    font-size: 14px;
}

.service-card.featured .service-features li {
    color: var(--gray-300);
}

.service-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: 700;
}

.service-card.featured .service-features li::before {
    color: var(--accent);
}

/* ===================================
   EXPERTISE SECTION
   =================================== */

.expertise {
    padding: var(--section-padding);
    background: var(--gray-100);
}

.tech-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.tech-category h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--primary);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.tech-tag {
    background: var(--light);
    color: var(--gray-700);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-fast);
    cursor: default;
}

.tech-tag:hover {
    background: var(--primary);
    color: var(--light);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* AI Tech Category */
.ai-tech-category {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(0, 102, 177, 0.08) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 16px;
    padding: 32px;
}

.ai-tech-category h4 {
    color: var(--accent);
}

.tech-tag.ai-tag {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--accent);
}

.tech-tag.ai-tag:hover {
    background: var(--accent);
    color: var(--dark);
    border-color: var(--accent);
}

/* AI Service Card */
.service-card.ai-card {
    grid-column: 1 / -1;
    display: flex;
    align-items: flex-start;
    gap: 48px;
    background: linear-gradient(135deg, #050d18 0%, #0a1628 50%, #0d1f38 100%);
    border: 1px solid rgba(0, 212, 255, 0.25);
    color: var(--light);
    position: relative;
    overflow: hidden;
}

.service-card.ai-card::after {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.ai-card-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--accent);
    color: var(--dark);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
}

.ai-card-left {
    flex: 1;
    min-width: 0;
}

.ai-card-left .service-icon {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent);
}

.ai-card-left .service-title {
    color: var(--light);
}

.ai-card-left .service-description {
    color: var(--gray-300);
}

.ai-card-right {
    flex-shrink: 0;
    width: 300px;
}

.service-features.ai-features li {
    color: var(--gray-300);
}

.service-features.ai-features li::before {
    color: var(--accent);
}

@media (max-width: 768px) {
    .service-card.ai-card {
        flex-direction: column;
        gap: 24px;
    }

    .ai-card-right {
        width: 100%;
    }
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about {
    padding: var(--section-padding);
    background: var(--light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-features {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--gradient-primary);
    color: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.feature-text strong {
    font-size: 18px;
    color: var(--primary);
}

.feature-text span {
    font-size: 15px;
    color: var(--gray-500);
}

.about-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    position: relative;
}

.visual-card {
    background: var(--gradient-dark);
    border-radius: 16px;
    padding: 40px;
    color: var(--light);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.visual-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.visual-card:hover::before {
    opacity: 0.1;
}

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

.card-1 {
    grid-column: 1 / -1;
}

.card-header {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray-400);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.card-metric {
    font-size: 56px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact {
    padding: var(--section-padding);
    background: var(--gray-100);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-description {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 48px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

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

.contact-icon {
    font-size: 24px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 16px;
    color: var(--primary);
    margin-bottom: 4px;
}

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

.contact-form-wrapper {
    background: var(--light);
    border-radius: 16px;
    padding: 48px;
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 16px 20px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-primary);
    color: var(--primary);
    background: var(--light);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 4px rgba(0, 102, 177, 0.1);
}

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

.btn-submit {
    background: var(--gradient-primary);
    color: var(--light);
    border: none;
    padding: 18px 40px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
    box-shadow: 0 4px 16px rgba(0, 102, 177, 0.3);
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 102, 177, 0.4);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--dark);
    color: var(--gray-300);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 80px;
    margin-bottom: 48px;
}

.footer-brand p {
    margin-top: 16px;
    color: var(--gray-400);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.footer-column h4 {
    color: var(--light);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1200px) {
    :root {
        --container-padding: 0 40px;
    }

    .nav-container {
        padding: 0 40px;
    }

    .hero {
        padding: 140px 40px 80px;
    }

    .hero-title {
        font-size: 64px;
    }

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

    .about-grid,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 60px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 0 24px;
        --section-padding: 80px 0;
    }

    .nav-container {
        padding: 0 24px;
        height: 70px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--light);
        flex-direction: column;
        padding: 40px 24px;
        gap: 24px;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

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

    .cta-button {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .hero {
        padding: 120px 24px 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 16px;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }

    .stat-number {
        font-size: 40px;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .tech-showcase {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-visual {
        grid-template-columns: 1fr;
    }

    .card-1 {
        grid-column: 1;
    }

    .contact-form-wrapper {
        padding: 32px 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .service-card {
        padding: 32px 24px;
    }

    .stat-number {
        font-size: 32px;
    }
}