/* ===================================
   CSS Variables & Design Tokens
   =================================== */
:root {
    /* Colors - Brand Identity */
    --navy-900: #161b33;
    /* Deep Dark Navy */
    --navy-800: #1f2544;

    /* Gradients inputs */
    --brand-blue: #0fa4e9;
    --brand-green: #4ade80;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Semantic Colors */
    --primary: var(--brand-blue);
    --primary-dark: var(--navy-900);
    --accent: var(--brand-green);

    --text-primary: var(--navy-900);
    --text-secondary: var(--gray-600);

    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);

    /* Branding Helpers */
    --brand-gradient: linear-gradient(135deg, var(--brand-blue), var(--brand-green));


    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* 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);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

p:last-child {
    margin-bottom: 0;
}

/* ===================================
   Layout Components
   =================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.text-content {
    font-size: 1.125rem;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-normal);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--navy-900);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--navy-800);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}



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

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--white);
    font-weight: var(--font-weight-medium);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-gradient);
    transition: width var(--transition-base);
}

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

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

.nav-cta {
    background: var(--navy-900);
    color: var(--white) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    background: var(--brand-gradient);
    box-shadow: var(--shadow-lg);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--white);
    transition: all var(--transition-base);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.08) 100%);
    clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 700px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

/* ===================================
   Buttons
   =================================== */
.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--navy-900);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    border: none;
    cursor: pointer;
}

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

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

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* ===================================
   Value Cards
   =================================== */
.value-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.value-card {
    padding: var(--spacing-xl);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue-200);
}

.value-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-md);
    color: var(--accent);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-icon svg {
    width: 28px;
    height: 28px;
}

.value-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.value-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ===================================
   Experience Section
   =================================== */
.experience-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.experience-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.experience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--violet-300);
}

.experience-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--violet-600);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(139, 92, 246, 0.15));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.experience-card h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.experience-card p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.6;
}

/* ===================================
   Process Timeline Section
   =================================== */
.process-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
}

.process-step {
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    position: relative;
    transition: all var(--transition-base);
}

.process-step:hover {
    border-color: var(--violet-400);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.process-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.process-step h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.process-step>p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.process-step ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.process-step ul li {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-xs);
    position: relative;
}

.process-step ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--violet-600);
    font-weight: var(--font-weight-bold);
}

/* ===================================
   Solutions List
   =================================== */
.solutions-content {
    max-width: 700px;
    margin: 0 auto;
}

.solutions-content h2 {
    margin-bottom: var(--spacing-xl);
}

.solutions-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.solutions-list li {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    background: var(--gray-50);
    border-left: 4px solid var(--violet-600);
    border-radius: var(--radius-md);
    font-size: 1.0625rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.solutions-list li:hover {
    background: var(--white);
    border-left-color: var(--brand-green);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

/* ===================================
   Contact Section
   =================================== */
.section-contact {
    background: linear-gradient(135deg, var(--navy-900), var(--primary));
    color: var(--white);
}

.section-contact h2,
.section-contact p {
    color: var(--white);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.section-contact .btn-primary {
    background: var(--white);
    color: var(--primary);
    margin-top: var(--spacing-md);
}

.section-contact .btn-primary:hover {
    background: var(--gray-100);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    text-align: center;
}

.contact-item h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.9;
}

.contact-item a {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.contact-item a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--navy-900);
    color: var(--gray-400);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-content p {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin-bottom: 0;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .menu-toggle {
        display: flex;
    }

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

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

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero {
        min-height: 80vh;
        padding: var(--spacing-3xl) 0;
    }

    .hero-visual {
        width: 100%;
        clip-path: polygon(0 0, 100% 0, 100% 40%, 0 60%);
    }

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

    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-3xl: 3rem;
        --spacing-2xl: 2.5rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

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

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

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

/* ===================================
   Trust Bar
   =================================== */
.trust-bar {
    padding: var(--spacing-lg) 0;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    text-align: center;
}

.trust-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.trust-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
    align-items: center;
}

.trust-item {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    transition: color var(--transition-base);
}

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

/* ===================================
   Services Split
   =================================== */
.services-split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.service-column {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.service-column:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.bitrix-col {
    border-top: 4px solid var(--brand-blue);
}

.dev-col {
    border-top: 4px solid var(--brand-green);
}

.service-header {
    margin-bottom: var(--spacing-lg);
}

.service-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.bitrix-icon {
    background: rgba(15, 164, 233, 0.1);
    color: var(--brand-blue);
}

.dev-icon {
    background: rgba(74, 222, 128, 0.1);
    color: var(--brand-green);
}

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

.service-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--text-secondary);
    font-size: 1rem;
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
}

/* ===================================
   Case Studies
   =================================== */
.case-study {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gray-100);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    border-radius: 999px;
    margin-bottom: var(--spacing-md);
}

.case-challenge,
.case-solution {
    font-size: 0.9375rem !important;
    margin-bottom: var(--spacing-sm) !important;
}

.case-result {
    margin-top: auto;
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-100);
    width: 100%;
}

.case-result span {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: #059669;
    /* Emerald 600 */
}

.case-study.highlight {
    background: linear-gradient(135deg, var(--bg-secondary), var(--white));
    border-style: dashed;
    border-width: 2px;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.btn-text {
    color: var(--primary);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    margin-top: var(--spacing-md);
    display: inline-block;
}

.btn-text:hover {
    text-decoration: underline;
}

/* ===================================
   Responsive Adjustments (New Sections)
   =================================== */
@media (max-width: 768px) {

    /* Trust Bar */
    .trust-grid {
        flex-direction: column;
        gap: var(--spacing-ms);
    }

    .trust-item {
        font-size: 1rem;
        padding: var(--spacing-xs) 0;
        border-bottom: 1px dashed var(--gray-200);
        width: 100%;
    }

    .trust-item:last-child {
        border-bottom: none;
    }

    /* Services */
    .services-split {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        margin-top: var(--spacing-lg);
    }

    .service-column {
        padding: var(--spacing-lg);
    }

    /* Case Studies */
    .case-result {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }
}