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

:root {
    --color-bg: #0a0e17;
    --color-bg-alt: #111827;
    --color-bg-card: #1a2235;
    --color-bg-card-hover: #1f2937;
    --color-bg-elevated: #162032;
    --color-border: #1e2d45;
    --color-border-light: #263550;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-accent: #38bdf8;
    --color-accent-hover: #7dd3fc;
    --color-accent-glow: rgba(56, 189, 248, 0.15);
    --color-accent-dim: rgba(56, 189, 248, 0.08);
    --color-success: #34d399;
    --color-warning: #fbbf24;
    --color-error: #f87171;
    --color-gradient-1: #38bdf8;
    --color-gradient-2: #8b5cf6;
    --color-gradient-3: #ec4899;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--color-accent-glow);
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --container-max: 1200px;
    --header-height: 76px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

address {
    font-style: normal;
}

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

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 16px;
}

/*=============================================
  HEADER
=============================================*/
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    height: var(--header-height);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-accent);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-menu a {
    display: block;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.925rem;
    font-weight: 500;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-card);
}

/*=============================================
  BUTTONS
=============================================*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 0.975rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-gradient-2));
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    color: #ffffff;
    box-shadow: 0 6px 30px rgba(56, 189, 248, 0.45);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
    background: var(--color-accent-dim);
}

.btn-full {
    width: 100%;
}

/*=============================================
  HERO
=============================================*/
.hero {
    padding: 100px 0 120px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(56, 189, 248, 0.08), transparent),
                radial-gradient(ellipse 60% 50% at 80% 80%, rgba(139, 92, 246, 0.06), transparent);
}

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

.hero-overline {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--color-text-primary);
}

.hero-accent {
    background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-diagram {
    position: relative;
    width: 400px;
    height: 400px;
}

.diagram-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: var(--color-border-light);
}

.diagram-node {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-primary);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.diagram-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
}

.diagram-dot-core {
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
    box-shadow: 0 0 20px var(--color-accent-glow);
}

.diagram-node-1 { top: 20px; left: 20px; }
.diagram-node-2 { top: 20px; right: 20px; }
.diagram-node-3 { bottom: 20px; left: 20px; }
.diagram-node-4 { bottom: 20px; right: 20px; }
.diagram-node-central {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px 28px;
    background: var(--color-bg-elevated);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    font-size: 0.95rem;
}

/*=============================================
  SECTIONS (shared)
=============================================*/
.section {
    padding: 100px 0;
    border-top: 1px solid var(--color-border);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-overline {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--color-text-primary);
}

.title-accent {
    background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/*=============================================
  SERVICES
=============================================*/
.services {
    background: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-gradient-2));
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/*=============================================
  ABOUT
=============================================*/
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.75;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 36px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

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

.about-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.about-card-header {
    display: flex;
    gap: 6px;
    padding: 14px 18px;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}

.about-card-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-text-muted);
}

.about-card-dot:nth-child(1) { background: #f87171; }
.about-card-dot:nth-child(2) { background: #fbbf24; }
.about-card-dot:nth-child(3) { background: #34d399; }

.about-card-body {
    padding: 24px 28px 28px;
}

.code-block {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 2;
    color: var(--color-text-primary);
    background: var(--color-bg);
    padding: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.code-keyword { color: #c084fc; font-weight: 600; }
.code-var { color: var(--color-accent); }
.code-prop { color: #fbbf24; }
.code-val { color: #34d399; }

/*=============================================
  SOLUTIONS
=============================================*/
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
}

.solution-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.solution-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.solution-desc {
    font-size: 0.925rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.solution-tags li {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-accent-dim);
    color: var(--color-accent);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
}

/*=============================================
  PROCESS
=============================================*/
.process {
    background: var(--color-bg-alt);
}

.process-steps {
    max-width: 800px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    gap: 28px;
    position: relative;
    padding-bottom: 40px;
}

.process-step:last-child {
    padding-bottom: 0;
}

.process-step-number {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
    background: var(--color-accent-dim);
    border: 2px solid rgba(56, 189, 248, 0.25);
    border-radius: var(--radius-md);
}

.process-step-content {
    flex: 1;
    padding-top: 6px;
}

.process-step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.process-step-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.process-step-line {
    position: absolute;
    left: 25px;
    top: 60px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-border-light), transparent);
}

/*=============================================
  CONTACT
=============================================*/
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.contact-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-detail {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    margin-top: 3px;
    color: var(--color-accent);
}

.contact-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.contact-value {
    font-size: 1rem;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

a.contact-value:hover {
    color: var(--color-accent-hover);
}

.contact-form-wrapper {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

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

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

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

.form-feedback {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    display: none;
}

.form-feedback.success {
    display: block;
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.3);
    color: var(--color-success);
}

.form-feedback.error {
    display: block;
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: var(--color-error);
}

/*=============================================
  FOOTER
=============================================*/
.site-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    max-width: 340px;
}

.footer-logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text-primary);
    margin-bottom: 16px;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.footer-logo-text {
    font-size: 1.15rem;
    font-weight: 700;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin-bottom: 16px;
}

.footer-address {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-heading {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    gap: 16px;
    flex-wrap: wrap;
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

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

/*=============================================
  ANIMATIONS
=============================================*/
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/*=============================================
  RESPONSIVE
=============================================*/
@media (max-width: 1024px) {
    .hero-grid,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-visual {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .services-grid,
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: 16px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 12px 16px;
        font-size: 1rem;
    }

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

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

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

    .hero {
        padding: 60px 0 80px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

    .about-stats {
        gap: 24px;
    }

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

    .process-step {
        gap: 20px;
    }

    .process-step-number {
        width: 40px;
        height: 40px;
        font-size: 0.95rem;
    }

    .process-step-line {
        left: 19px;
        top: 48px;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

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

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .about-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
}