/* ============================
   CSS Custom Properties — Light/Blue Theme
   ============================ */
:root {
    /* Colors — Light Premium Blue */
    --c-bg: #f8faff;
    --c-surface: #ffffff;
    --c-surface-2: #f0f4ff;
    --c-surface-3: #e4ecff;
    --c-border: rgba(30, 64, 175, 0.08);
    --c-border-hover: rgba(30, 64, 175, 0.18);
    --c-text: #0f172a;
    --c-text-secondary: #475569;
    --c-text-muted: #94a3b8;
    --c-accent: #1d4ed8;
    --c-accent-light: #3b82f6;
    --c-accent-glow: rgba(59, 130, 246, 0.35);
    --c-accent-deep: #1e3a8a;
    --c-green: #06b6d4;
    --c-green-glow: rgba(6, 182, 212, 0.25);
    --c-gradient-1: #2563eb;
    --c-gradient-2: #06b6d4;

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

    /* Spacing */
    --s-section: 120px;
    --s-container: 1200px;

    /* Effects */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-card: 0 4px 24px rgba(30, 64, 175, 0.06), 0 0 0 1px var(--c-border);
    --shadow-card-hover: 0 12px 48px rgba(30, 64, 175, 0.12), 0 0 0 1px var(--c-border-hover);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--f-main);
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ============================
   Container
   ============================ */
.container {
    max-width: var(--s-container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================
   Animation Classes
   ============================ */
.anim-fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ============================
   CTA Button
   ============================ */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    padding: 14px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.cta-btn--primary {
    background: linear-gradient(135deg, var(--c-gradient-1), var(--c-gradient-2));
    color: #fff;
    box-shadow: 0 4px 24px var(--c-accent-glow), 0 0 0 1px rgba(37, 99, 235, 0.15);
}

.cta-btn--primary:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 40px var(--c-accent-glow), 0 0 0 1px rgba(37, 99, 235, 0.3);
}

.cta-btn--primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.25), transparent);
    opacity: 0;
    transition: var(--transition);
}

.cta-btn--primary:hover::after {
    opacity: 1;
}

.cta-btn--secondary {
    background: var(--c-surface);
    color: var(--c-accent);
    border: 2px solid rgba(37, 99, 235, 0.2);
    font-weight: 600;
}

.cta-btn--secondary:hover {
    background: var(--c-surface-2);
    border-color: rgba(37, 99, 235, 0.4);
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.1);
}

.cta-btn--nav {
    padding: 10px 20px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--c-gradient-1), var(--c-gradient-2));
    color: #fff;
    box-shadow: 0 2px 12px var(--c-accent-glow);
}

.cta-btn--nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--c-accent-glow);
}

.cta-btn-icon {
    font-size: 1rem;
}

/* ============================
   Navbar
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(248, 250, 255, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--c-border);
    padding: 10px 0;
    box-shadow: 0 2px 20px rgba(30, 64, 175, 0.06);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.logo-icon {
    font-size: 1.5rem;
}

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

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--c-text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--c-gradient-1), var(--c-gradient-2));
    border-radius: 2px;
    transition: var(--transition);
}

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

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

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================
   Hero Section
   ============================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #eef2ff 0%, #f8faff 40%, #ffffff 100%);
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 30%, rgba(37, 99, 235, 0.08), transparent),
        radial-gradient(ellipse 50% 40% at 70% 60%, rgba(6, 182, 212, 0.06), transparent);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37, 99, 235, 0.06);
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: 100px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--c-accent);
    margin-bottom: 32px;
    backdrop-filter: blur(8px);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-green);
    box-shadow: 0 0 12px var(--c-green-glow);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.3); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--c-accent-deep);
}

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--c-text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 28px 40px;
    box-shadow: 0 4px 32px rgba(30, 64, 175, 0.06);
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.hero-stat-num {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--c-gradient-1), var(--c-gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stat-plus {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--c-gradient-1), var(--c-gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hero-stat-divider {
    width: 1px;
    height: 48px;
    background: var(--c-border);
}

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: float 3s ease-in-out infinite;
}

.hero-scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--c-accent-light);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.hero-scroll-wheel {
    width: 3px;
    height: 8px;
    background: var(--c-accent-light);
    border-radius: 2px;
    animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-8px); }
}

@keyframes scroll-wheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(8px); }
}

/* ============================
   Section Headers
   ============================ */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--c-accent);
    margin-bottom: 16px;
    background: rgba(37, 99, 235, 0.06);
    padding: 4px 14px;
    border-radius: 100px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--c-accent-deep);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--c-text-secondary);
    line-height: 1.6;
}

/* ============================
   Services Section
   ============================ */
.services {
    padding: var(--s-section) 0;
    position: relative;
    background: #ffffff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    position: relative;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px 32px;
    transition: var(--transition-slow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--c-border-hover);
    box-shadow: var(--shadow-card-hover);
}

.service-card-glow {
    position: absolute;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent);
    opacity: 0;
    transition: var(--transition-slow);
    pointer-events: none;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    color: var(--c-accent);
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
    background: rgba(37, 99, 235, 0.06);
    border-radius: 16px;
    padding: 12px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: rgba(37, 99, 235, 0.1);
    transform: scale(1.08);
}

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

.service-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    color: var(--c-accent-deep);
}

.service-card-desc {
    font-size: 0.9rem;
    color: var(--c-text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    flex: 1;
    position: relative;
    z-index: 1;
}

.service-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--c-accent);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.service-card:hover .service-card-link {
    gap: 12px;
    color: var(--c-accent-deep);
}

/* ============================
   Advantages Section
   ============================ */
.advantages {
    padding: var(--s-section) 0;
    background: linear-gradient(180deg, #eef2ff 0%, var(--c-bg) 100%);
    position: relative;
    overflow: hidden;
}

.advantages::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.07), transparent);
    pointer-events: none;
}

.advantages::after {
    content: '';
    position: absolute;
    bottom: -200px;
    left: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.05), transparent);
    pointer-events: none;
}

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

.advantage-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-slow);
    box-shadow: 0 2px 16px rgba(30, 64, 175, 0.04);
}

.advantage-card:hover {
    border-color: var(--c-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 8px 40px rgba(30, 64, 175, 0.08);
}

.advantage-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.advantage-icon {
    width: 56px;
    height: 56px;
    color: var(--c-accent);
}

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

.advantage-number {
    font-size: 4rem;
    font-weight: 900;
    color: rgba(37, 99, 235, 0.06);
    line-height: 1;
    letter-spacing: -0.04em;
    user-select: none;
}

.advantage-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--c-accent-deep);
}

.advantage-desc {
    font-size: 0.95rem;
    color: var(--c-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.advantage-bar {
    height: 3px;
    background: linear-gradient(90deg, var(--c-gradient-1), var(--c-gradient-2));
    border-radius: 3px;
    width: 48px;
    transition: var(--transition-slow);
}

.advantage-card:hover .advantage-bar {
    width: 100%;
}

/* ============================
   How We Work Section
   ============================ */
.how {
    padding: var(--s-section) 0;
    position: relative;
    background: #ffffff;
}

.how-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.how-timeline::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--c-accent), var(--c-green), transparent);
    border-radius: 2px;
}

.how-step {
    display: flex;
    align-items: flex-start;
    gap: 32px;
    margin-bottom: 48px;
    position: relative;
    padding-left: 24px;
}

.how-step:last-child {
    margin-bottom: 0;
}

.how-step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-gradient-1), var(--c-gradient-2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    position: relative;
    z-index: 2;
    box-shadow: 0 0 24px var(--c-accent-glow);
}

.how-step-content {
    flex: 1;
    padding-top: 4px;
}

.how-step-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--c-accent-deep);
}

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

.how-step-visual {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    color: var(--c-text-muted);
    opacity: 0.4;
    transition: var(--transition);
}

.how-step:hover .how-step-visual {
    opacity: 1;
    color: var(--c-accent);
}

.how-step-icon {
    width: 100%;
    height: 100%;
}

.how-step-line {
    display: none;
}

/* ============================
   Footer
   ============================ */
.footer {
    padding: 80px 0 0;
    border-top: 1px solid var(--c-border);
    background: var(--c-accent-deep);
    color: rgba(255, 255, 255, 0.85);
}

.footer .logo-text {
    color: #ffffff;
}

.footer .logo-accent {
    background: linear-gradient(135deg, #60a5fa, #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 64px;
}

.footer-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 16px;
    line-height: 1.6;
}

.footer-heading {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #ffffff;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-link:hover {
    color: #60a5fa;
}

.footer-contacts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-contact:hover {
    color: #60a5fa;
}

.footer-contact svg {
    flex-shrink: 0;
    color: #60a5fa;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ============================
   Responsive
   ============================ */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .advantages-grid .advantage-card:last-child {
        grid-column: 1 / -1;
    }

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

@media (max-width: 768px) {
    :root {
        --s-section: 80px;
    }

    .nav-links, .cta-btn--nav {
        display: none;
    }

    .burger {
        display: flex;
    }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(248, 250, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        z-index: 999;
        justify-content: center;
        align-items: center;
        gap: 24px;
    }

    .nav-links.open .nav-link {
        font-size: 1.5rem;
        color: var(--c-accent-deep);
    }

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

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

    .advantages-grid .advantage-card:last-child {
        grid-column: auto;
    }

    .how-step {
        flex-direction: column;
        gap: 16px;
        padding-left: 0;
    }

    .how-step-visual {
        display: none;
    }

    .how-timeline::before {
        left: 24px;
    }

    .how-step-number {
        margin-left: 0;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
        padding: 24px;
    }

    .hero-stat-divider {
        width: 48px;
        height: 1px;
    }

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

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .service-card {
        padding: 28px 24px;
    }

    .advantage-card {
        padding: 28px 24px;
    }
}

/* ============================
   Selection & Scrollbar
   ============================ */
::selection {
    background: var(--c-accent);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--c-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--c-surface-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--c-accent-light);
}

/* ============================
   Smooth Reveal on Load
   ============================ */
body {
    
}

    to { opacity: 1; }
}