/* ===== BASE / RESET ===== */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    color: #0f172a;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f4f7fb 100%);
    line-height: 1.6;
    min-width: 320px;
}

body.menu-open {
    overflow: hidden;
}

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

a {
    color: inherit;
}

button,
input,
textarea {
    font: inherit;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== TYPOGRAPHY ===== */

h1,
h2,
h3,
h4,
p {
    margin: 0;
}

.section {
    padding: 96px 0;
}

.section-head {
    max-width: 760px;
    margin: 0 auto 48px;
    text-align: center;
}

.section-head h2 {
    font-size: 42px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-top: 14px;
    margin-bottom: 18px;
    color: #0f172a;
}

.section-head p {
    font-size: 18px;
    color: #475569;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #2563eb;
}

.section-label::before {
    content: "";
    width: 28px;
    height: 2px;
    border-radius: 999px;
    background: #2563eb;
}

/* ===== BUTTONS ===== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 22px;
    border: none;
    border-radius: 14px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        background-color 0.18s ease,
        color 0.18s ease,
        border-color 0.18s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    box-shadow: 0 14px 34px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover {
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.28);
}

.btn-secondary {
    color: #1e293b;
    background: #ffffff;
    border: 1px solid #dbe5f2;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.btn-secondary:hover {
    border-color: #bfd0ea;
}

.btn-large {
    min-height: 54px;
    padding: 16px 26px;
    font-size: 15px;
}

.btn-full {
    width: 100%;
}

/* ===== HEADER ===== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(14px);
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid rgba(219, 229, 242, 0.95);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-height: 80px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: #ffffff;
    font-size: 20px;
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.logo-text strong {
    font-size: 17px;
    color: #0f172a;
}

.logo-text small {
    font-size: 12px;
    color: #64748b;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.main-nav a {
    position: relative;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    color: #334155;
    transition: color 0.18s ease;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -7px;
    width: 100%;
    height: 2px;
    border-radius: 999px;
    background: #2563eb;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.18s ease;
}

.main-nav a:hover {
    color: #2563eb;
}

.main-nav a:hover::after {
    transform: scaleX(1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.header-phone {
    white-space: nowrap;
    text-decoration: none;
    font-weight: 700;
    color: #0f172a;
}

.burger {
    display: none;
    width: 46px;
    height: 46px;
    padding: 0;
    border: 1px solid #dbe5f2;
    border-radius: 12px;
    background: #ffffff;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    flex-shrink: 0;
}

.burger span {
    position: absolute;
    width: 20px;
    height: 2px;
    border-radius: 999px;
    background: #0f172a;
    transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease;
}

.burger span:nth-child(1) {
    top: 15px;
}

.burger span:nth-child(2) {
    top: 22px;
}

.burger span:nth-child(3) {
    top: 29px;
}

.burger.is-active span:nth-child(1) {
    top: 22px;
    transform: rotate(45deg);
}

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

.burger.is-active span:nth-child(3) {
    top: 22px;
    transform: rotate(-45deg);
}

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

.hero-section {
    position: relative;
    padding: 72px 0 96px;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 42px;
    align-items: center;
}

.hero-content {
    max-width: 690px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    padding: 10px 14px;
    border: 1px solid #dbe5f2;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.85);
    color: #1d4ed8;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
}

.hero-title {
    font-size: 56px;
    line-height: 1.02;
    letter-spacing: -0.04em;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 22px;
}

.hero-text {
    max-width: 620px;
    font-size: 19px;
    color: #475569;
    margin-bottom: 28px;
}

.hero-points {
    display: grid;
    gap: 12px;
    margin-bottom: 32px;
}

.hero-point {
    position: relative;
    padding-left: 28px;
    color: #1e293b;
    font-weight: 600;
}

.hero-point::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.12);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-visual {
    position: relative;
    min-height: 520px;
}

.hero-card {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(219, 229, 242, 0.9);
    border-radius: 28px;
    box-shadow: 0 30px 70px rgba(15, 23, 42, 0.10);
    backdrop-filter: blur(14px);
}

.hero-card-main {
    max-width: 430px;
    padding: 34px;
    margin: 56px 0 0 auto;
}

.hero-card-label {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #2563eb;
    margin-bottom: 12px;
}

.hero-card-title {
    font-size: 28px;
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 14px;
    color: #0f172a;
}

.hero-card-main p {
    color: #475569;
    font-size: 16px;
}

.hero-stat {
    position: absolute;
    z-index: 3;
    min-width: 170px;
    padding: 18px 20px;
    background: #ffffff;
    border: 1px solid #dbe5f2;
    border-radius: 20px;
    box-shadow: 0 24px 44px rgba(15, 23, 42, 0.08);
}

.hero-stat strong {
    display: block;
    margin-bottom: 4px;
    font-size: 22px;
    line-height: 1.1;
    color: #0f172a;
}

.hero-stat span {
    display: block;
    font-size: 14px;
    color: #64748b;
}

.stat-1 {
    top: 16px;
    left: 28px;
}

.stat-2 {
    right: 10px;
    bottom: 28px;
    max-width: 210px;
}

.hero-abstract {
    position: absolute;
    inset: 30px 20px 30px 20px;
    border-radius: 40px;
    background:
        radial-gradient(circle at 30% 30%, rgba(37, 99, 235, 0.18), transparent 26%),
        radial-gradient(circle at 78% 24%, rgba(59, 130, 246, 0.18), transparent 22%),
        radial-gradient(circle at 70% 75%, rgba(29, 78, 216, 0.16), transparent 24%),
        linear-gradient(145deg, #eef5ff 0%, #dfeeff 100%);
}

/* ===== TRUST ===== */

.trust-section {
    padding: 0 0 24px;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.trust-item {
    padding: 24px 20px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.90);
    border: 1px solid #dbe5f2;
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.05);
    text-align: center;
}

.trust-item strong {
    display: block;
    margin-bottom: 8px;
    font-size: 18px;
    color: #0f172a;
}

.trust-item span {
    display: block;
    font-size: 14px;
    color: #64748b;
}

/* ===== COMMON CARDS ===== */

.info-card,
.service-card,
.advantage-item,
.process-step,
.price-card,
.case-card,
.review-card,
.contacts-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #dbe5f2;
    border-radius: 24px;
    box-shadow: 0 22px 44px rgba(15, 23, 42, 0.05);
}

.info-card,
.service-card,
.advantage-item,
.process-step,
.price-card,
.case-card,
.review-card {
    padding: 28px;
}

.info-card h3,
.service-card h3,
.advantage-item h3,
.process-step h3,
.price-card h3,
.case-card h3,
.review-card strong,
.contacts-card h3 {
    font-size: 22px;
    line-height: 1.2;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 12px;
}

.info-card p,
.service-card p,
.advantage-item p,
.process-step p,
.price-card p,
.case-card p,
.review-card p,
.contacts-card p {
    color: #475569;
    font-size: 15px;
}

/* ===== AUDIENCE / SERVICES / CASES / REVIEWS ===== */

.audience-grid,
.services-grid,
.cases-grid,
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: "";
    position: absolute;
    inset: auto -30px -30px auto;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.10), transparent 65%);
}

.review-card p {
    margin-bottom: 18px;
    font-size: 16px;
}

/* ===== ADVANTAGES ===== */

.advantages-container {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 28px;
    align-items: start;
}

.advantages-content h2 {
    margin-top: 14px;
    margin-bottom: 18px;
    font-size: 44px;
    line-height: 1.12;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.advantages-content p {
    font-size: 18px;
    color: #475569;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

/* ===== PROCESS ===== */

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.process-number {
    display: inline-flex;
    margin-bottom: 14px;
    font-size: 32px;
    line-height: 1;
    font-weight: 800;
    color: #2563eb;
    letter-spacing: -0.04em;
}

/* ===== PRICING ===== */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: stretch;
}

.price-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.price-card-top p {
    font-size: 15px;
    color: #64748b;
}

.price-card ul {
    list-style: none;
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
}

.price-card li {
    position: relative;
    padding-left: 24px;
    color: #334155;
    font-weight: 500;
}

.price-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #2563eb;
}

.price-card .btn {
    margin-top: auto;
}

.price-card-featured {
    border: 2px solid #2563eb;
    box-shadow: 0 26px 54px rgba(37, 99, 235, 0.14);
    transform: translateY(-4px);
}

.price-badge {
    position: absolute;
    top: 18px;
    right: 18px;
    padding: 8px 12px;
    border-radius: 999px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ===== LEAD FORM ===== */

.lead-container {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 28px;
    align-items: start;
}

.lead-content h2 {
    margin-top: 14px;
    margin-bottom: 18px;
    font-size: 44px;
    line-height: 1.12;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.lead-content p {
    font-size: 18px;
    color: #475569;
    max-width: 560px;
}

.lead-form {
    padding: 30px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid #dbe5f2;
    border-radius: 28px;
    box-shadow: 0 26px 54px rgba(15, 23, 42, 0.07);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #334155;
}

input,
textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 14px;
    background: #ffffff;
    color: #0f172a;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
    outline: none;
    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: #94a3b8;
}

input:focus,
textarea:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
}

.form-note {
    margin-top: 14px;
    font-size: 13px;
    color: #64748b;
}

.form-alert {
    margin-bottom: 18px;
    padding: 14px 16px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
}

.form-alert-success {
    color: #166534;
    background: #dcfce7;
    border: 1px solid #bbf7d0;
}

.form-alert-error {
    color: #991b1b;
    background: #fee2e2;
    border: 1px solid #fecaca;
}

.form-error {
    display: block;
    margin-top: 7px;
    font-size: 13px;
    font-weight: 600;
    color: #dc2626;
}

/* ===== FAQ ===== */

.faq-list {
    max-width: 920px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}

.faq-item {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #dbe5f2;
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
}

.faq-question {
    position: relative;
    width: 100%;
    text-align: left;
    padding: 22px 60px 22px 24px;
    border: none;
    background: transparent;
    color: #0f172a;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
}

.faq-question::before,
.faq-question::after {
    content: "";
    position: absolute;
    right: 24px;
    top: 50%;
    width: 16px;
    height: 2px;
    border-radius: 999px;
    background: #2563eb;
    transform: translateY(-50%);
    transition: transform 0.18s ease, opacity 0.18s ease;
}

.faq-question::after {
    transform: translateY(-50%) rotate(90deg);
}

.faq-item.is-open .faq-question::after {
    opacity: 0;
    transform: translateY(-50%) rotate(90deg) scaleX(0.4);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.24s ease;
}

.faq-answer p {
    padding: 0 24px 24px;
    color: #475569;
    font-size: 15px;
}

/* ===== CONTACTS ===== */

.contacts-container {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 28px;
    align-items: start;
}

.contacts-info h2 {
    margin-top: 14px;
    margin-bottom: 22px;
    font-size: 44px;
    line-height: 1.12;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.contact-list {
    display: grid;
    gap: 18px;
}

.contact-item {
    padding: 22px 24px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #dbe5f2;
    border-radius: 20px;
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.05);
}

.contact-item strong {
    display: block;
    margin-bottom: 6px;
    font-size: 15px;
    color: #334155;
}

.contact-item a,
.contact-item span {
    font-size: 17px;
    line-height: 1.5;
    color: #0f172a;
    text-decoration: none;
}

.contacts-card {
    padding: 32px;
}

.contacts-card .btn {
    margin-top: 20px;
}

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

.site-footer {
    padding: 34px 0;
    background: #0f172a;
    color: rgba(255, 255, 255, 0.92);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-brand strong {
    display: block;
    margin-bottom: 6px;
    font-size: 18px;
}

.footer-brand p,
.footer-copy p {
    color: rgba(255, 255, 255, 0.68);
    font-size: 14px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links a {
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.86);
}

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

@media (max-width: 1180px) {
    .hero-title {
        font-size: 48px;
    }

    .section-head h2,
    .advantages-content h2,
    .lead-content h2,
    .contacts-info h2 {
        font-size: 38px;
    }

    .trust-grid,
    .audience-grid,
    .services-grid,
    .cases-grid,
    .reviews-grid,
    .pricing-grid,
    .process-grid {
        gap: 18px;
    }
}

@media (max-width: 1024px) {
    .section {
        padding: 82px 0;
    }

    .hero-container,
    .advantages-container,
    .lead-container,
    .contacts-container {
        grid-template-columns: 1fr;
    }

    .hero-content,
    .lead-content p {
        max-width: none;
    }

    .hero-visual {
        min-height: 440px;
    }

    .trust-grid,
    .audience-grid,
    .services-grid,
    .cases-grid,
    .reviews-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .process-grid,
    .advantages-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 820px) {
    .header-container {
        min-height: 72px;
    }

    .header-phone,
    .header-actions .btn {
        display: none;
    }

    .burger {
        display: inline-flex;
    }

    .main-nav {
        position: absolute;
        top: calc(100% + 10px);
        left: 20px;
        right: 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px;
        background: rgba(255, 255, 255, 0.98);
        border: 1px solid #dbe5f2;
        border-radius: 20px;
        box-shadow: 0 24px 50px rgba(15, 23, 42, 0.10);
    }

    .main-nav.is-open {
        display: flex;
    }

    .main-nav a {
        padding: 14px 12px;
        border-radius: 12px;
    }

    .main-nav a::after {
        display: none;
    }

    .main-nav a:hover {
        background: #eff6ff;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    .section {
        padding: 70px 0;
    }

    .section-head {
        margin-bottom: 34px;
        text-align: left;
    }

    .section-head h2,
    .advantages-content h2,
    .lead-content h2,
    .contacts-info h2 {
        font-size: 30px;
        line-height: 1.12;
    }

    .section-head p,
    .lead-content p,
    .advantages-content p {
        font-size: 16px;
    }

    .hero-section {
        padding: 52px 0 74px;
    }

    .hero-title {
        font-size: 34px;
        line-height: 1.06;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

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

    .hero-visual {
        min-height: 360px;
    }

    .hero-card-main {
        max-width: 100%;
        margin: 50px 0 0;
        padding: 24px;
    }

    .hero-card-title {
        font-size: 22px;
    }

    .hero-stat {
        min-width: 138px;
        padding: 14px 16px;
    }

    .stat-1 {
        top: 8px;
        left: 10px;
    }

    .stat-2 {
        right: 0;
        bottom: 8px;
    }

    .trust-grid,
    .audience-grid,
    .services-grid,
    .cases-grid,
    .reviews-grid,
    .pricing-grid,
    .process-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .info-card,
    .service-card,
    .advantage-item,
    .process-step,
    .price-card,
    .case-card,
    .review-card,
    .contacts-card,
    .lead-form {
        padding: 22px;
        border-radius: 20px;
    }

    .faq-question {
        padding: 18px 52px 18px 18px;
        font-size: 16px;
    }

    .faq-answer p {
        padding: 0 18px 18px;
    }

    .contact-item {
        padding: 18px 18px;
    }

    .footer-container {
        flex-direction: column;
        align-items: flex-start;
    }
}