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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-900);
    line-height: 1.6;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 { line-height: 1.2; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
}
.btn--primary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.btn--primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}
.btn--outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn--outline:hover {
    background: var(--primary);
    color: var(--white);
}
.btn--sm { padding: 10px 20px; font-size: 0.9rem; }
.btn--full { width: 100%; }

/* === Header === */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-100);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
}
.logo span { color: var(--primary); }
.nav { display: flex; gap: 32px; }
.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: color var(--transition);
}
.nav a:hover { color: var(--primary); }
.burger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--dark); transition: all var(--transition); }

/* === Hero === */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 50%, var(--primary-light) 100%);
}
.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
}
.highlight { color: var(--primary); }
.hero__sub {
    font-size: 1.15rem;
    color: var(--gray-500);
    margin-bottom: 32px;
    max-width: 480px;
}
.hero__actions { display: flex; gap: 16px; }
.hero__visual { display: flex; flex-direction: column; gap: 16px; }
.hero__card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}
.hero__card:hover { transform: translateX(8px); }
.card-icon { font-size: 1.5rem; }
.card-text { font-weight: 600; font-size: 1.05rem; }

/* === Section Titles === */
.section-title {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 48px;
    color: var(--dark);
}

/* === Problems === */
.problems { padding: 80px 0; background: var(--white); }
.problems__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}
.problem-card {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius);
    background: var(--gray-100);
    transition: transform var(--transition);
}
.problem-card:hover { transform: translateY(-4px); }
.problem-icon { font-size: 2rem; margin-bottom: 12px; }
.problem-card p { font-size: 0.95rem; color: var(--gray-700); }
.problems__cta {
    text-align: center;
    font-size: 1.1rem;
    color: var(--primary);
    font-weight: 600;
}

/* === Services === */
.services { padding: 80px 0; background: var(--gray-100); }
.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.service-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.service-icon { font-size: 2.5rem; margin-bottom: 16px; }
.service-card h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--dark); }
.service-card p { font-size: 0.9rem; color: var(--gray-500); }

/* === How === */
.how { padding: 80px 0; background: var(--white); }
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.step { text-align: center; }
.step__number {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.step h3 { margin-bottom: 8px; color: var(--dark); }
.step p { color: var(--gray-500); font-size: 0.95rem; }

/* === Cases === */
.cases { padding: 80px 0; background: var(--gray-100); }
.cases__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}
.case-card:hover { transform: translateY(-4px); }
.case-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}
.case-card h3 { margin-bottom: 8px; font-size: 1.05rem; }
.case-card p { color: var(--gray-500); font-size: 0.9rem; margin-bottom: 16px; }
.case-result {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dark);
}

/* === Pricing === */
.pricing { padding: 80px 0; background: var(--white); }
.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}
.price-card {
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    position: relative;
    transition: transform var(--transition);
}
.price-card:hover { transform: translateY(-4px); }
.price-card--pop {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: scale(1.04);
}
.price-card--pop:hover { transform: scale(1.04) translateY(-4px); }
.price-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    padding: 4px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}
.price-card h3 { font-size: 1.3rem; margin-bottom: 8px; color: var(--dark); }
.price { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 24px; }
.price-card ul { margin-bottom: 24px; }
.price-card li {
    padding: 8px 0;
    color: var(--gray-700);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--gray-100);
}
.price-card li:last-child { border: none; }

/* === Contact === */
.contact { padding: 80px 0; background: var(--dark); color: var(--white); }
.contact .section-title { color: var(--white); }
.contact__sub {
    text-align: center;
    color: var(--gray-300);
    margin-bottom: 40px;
    margin-top: -32px;
}
.contact__methods {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 48px;
}
.contact-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1.05rem;
    transition: all var(--transition);
}
.contact-btn--tg { background: #2AABEE; color: var(--white); }
.contact-btn--tg:hover { background: #1d95d2; transform: translateY(-2px); }
.contact-btn--email { background: var(--gray-700); color: var(--white); }
.contact-btn--email:hover { background: var(--gray-500); transform: translateY(-2px); }
.contact-btn__icon { font-size: 1.3rem; }

.contact-form {
    max-width: 480px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.contact-form input,
.contact-form textarea {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--gray-700);
    background: var(--gray-900);
    color: var(--white);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--gray-500); }
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* === Footer === */
.footer {
    padding: 32px 0;
    background: var(--gray-900);
    color: var(--gray-500);
}
.footer__inner {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}
.footer .logo { font-size: 1.2rem; }
.footer p { font-size: 0.9rem; }
.footer__copy { font-size: 0.8rem; }

/* === Mobile === */
@media (max-width: 768px) {
    .nav { display: none; }
    .header .btn--sm { display: none; }
    .burger { display: flex; }

    .hero { padding: 110px 0 60px; }
    .hero__inner { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 2rem; }
    .hero__actions { flex-direction: column; }

    .problems__grid { grid-template-columns: repeat(2, 1fr); }
    .services__grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; gap: 24px; }
    .cases__grid { grid-template-columns: 1fr; }
    .pricing__grid { grid-template-columns: 1fr; }
    .price-card--pop { transform: none; }
    .price-card--pop:hover { transform: translateY(-4px); }

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

@media (max-width: 480px) {
    .problems__grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.6rem; }
}

/* === Nav Mobile Menu === */
.nav--open {
    display: flex !important;
    flex-direction: column;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--white);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow-lg);
}

/* === Animations === */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate { animation: fadeUp 0.5s ease forwards; opacity: 0; }