:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --ink: #172033;
    --muted: #627088;
    --primary: #1363df;
    --primary-dark: #0f4fb0;
    --line: #dfe5ef;
    --success: #0f8f62;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Inter, Arial, sans-serif;
}

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

.site-header,
.site-footer {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
    max-width: 1160px;
    padding: 22px 24px;
}

.brand {
    color: var(--primary);
    font-size: 22px;
    font-weight: 800;
}

.brand-logo {
    align-items: center;
    display: inline-flex;
}

.brand-logo img {
    display: block;
    height: 46px;
    max-width: 190px;
    object-fit: contain;
}

.nav {
    align-items: center;
    display: flex;
    gap: 18px;
}

.nav a {
    color: var(--muted);
    font-weight: 650;
}

.nav .nav-button {
    background: var(--ink);
    border-radius: 8px;
    color: #fff;
    padding: 10px 14px;
}

.hero,
.page-head,
.feature-band,
.pricing-grid,
.auth-wrap {
    margin: 0 auto;
    max-width: 1160px;
    padding: 52px 24px;
}

.hero {
    align-items: center;
    display: grid;
    gap: 32px;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
    min-height: calc(100vh - 170px);
}

.eyebrow {
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .04em;
    margin: 0 0 12px;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(38px, 6vw, 72px);
    line-height: 1.03;
    margin: 0;
    max-width: 860px;
}

.hero-logo {
    display: block;
    height: auto;
    margin-bottom: 18px;
    max-width: min(330px, 82vw);
}

h2,
h3 {
    margin: 0 0 12px;
}

.hero-copy,
.page-head p,
.feature-band p,
.auth-note {
    color: var(--muted);
    font-size: 18px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.btn {
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    font-weight: 800;
    justify-content: center;
    padding: 13px 18px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: #e9eef7;
    color: var(--ink);
}

.hero-panel,
.price-card,
.auth-card,
.feature-band article {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 18px 60px rgba(23, 32, 51, .08);
}

.hero-panel {
    display: grid;
    gap: 14px;
    padding: 20px;
}

.metric {
    border-left: 4px solid var(--primary);
    padding: 12px 14px;
}

.metric strong {
    display: block;
    font-size: 30px;
}

.metric span,
.price-card span {
    color: var(--muted);
}

.feature-band,
.pricing-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-band article,
.price-card,
.auth-card {
    padding: 24px;
}

.pricing-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.price-card strong {
    display: block;
    font-size: 34px;
    margin: 14px 0 4px;
}

.price-card ul {
    color: var(--muted);
    line-height: 1.9;
    min-height: 120px;
    padding-left: 18px;
}

.auth-wrap {
    align-items: center;
    display: flex;
    justify-content: center;
    min-height: calc(100vh - 170px);
}

.auth-card {
    max-width: 440px;
    width: 100%;
}

.auth-logo {
    margin-bottom: 18px;
}

.auth-logo img {
    display: block;
    height: auto;
    max-width: 240px;
}

.auth-card h1 {
    font-size: 38px;
}

.auth-form {
    display: grid;
    gap: 16px;
    margin-top: 24px;
}

.alert {
    border-radius: 8px;
    font-weight: 700;
    margin-top: 18px;
    padding: 12px 14px;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
}

.demo-note {
    background: #f1f5f9;
    border-radius: 8px;
    color: var(--muted);
    line-height: 1.6;
    margin-top: 16px;
    padding: 12px 14px;
}

.auth-form label {
    display: grid;
    gap: 8px;
    font-weight: 750;
}

.auth-form input {
    border: 1px solid var(--line);
    border-radius: 8px;
    font: inherit;
    padding: 13px 14px;
}

.site-footer {
    color: var(--muted);
    gap: 16px;
}

@media (max-width: 900px) {
    .hero,
    .feature-band,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .site-header,
    .site-footer,
    .nav {
        align-items: flex-start;
        flex-direction: column;
    }
}