:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-text: #1f2933;
    --color-muted: #64748b;
    --color-line: #d8dee7;
    --color-primary: #246b5f;
    --color-primary-dark: #174c44;
    --color-accent: #2f6f9f;
    --radius: 8px;
    --shadow: 0 12px 30px rgba(20, 31, 43, .08);
    --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-bg);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.55;
}
a { color: inherit; }
.site-header, .site-footer, .site-main {
    width: min(var(--container), calc(100% - 32px));
    margin-inline: auto;
}
.site-header {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand { text-decoration: none; font-weight: 800; font-size: 22px; color: var(--color-primary-dark); }
.main-nav { display: flex; gap: 18px; align-items: center; font-size: 15px; }
.main-nav a, .site-footer a, .link-muted { text-decoration: none; color: var(--color-muted); }
.main-nav a:hover, .site-footer a:hover, .link-muted:hover { color: var(--color-primary); }
.header-actions { display: flex; gap: 12px; align-items: center; }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    border-radius: var(--radius);
    text-decoration: none;
    border: 1px solid transparent;
    font-weight: 650;
    transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--color-primary); color: #fff; }
.button-primary:hover { background: var(--color-primary-dark); }
.button-secondary { border-color: var(--color-line); color: var(--color-text); background: #fff; }
.hero {
    min-height: 560px;
    display: grid;
    align-items: center;
    padding: 72px 0 56px;
}
.hero > div { max-width: 760px; }
.eyebrow {
    color: var(--color-primary);
    font-weight: 750;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: 13px;
}
h1 { font-size: clamp(38px, 6vw, 68px); line-height: 1.05; margin: 0 0 22px; letter-spacing: 0; }
h2 { font-size: 24px; line-height: 1.2; margin: 0 0 12px; letter-spacing: 0; }
.hero p { font-size: 20px; max-width: 680px; color: var(--color-muted); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.section-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 24px 0 72px;
}
.section-grid article, .auth-panel, .account-content, .account-nav {
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.section-grid article { padding: 24px; }
.page-head { padding: 56px 0 28px; max-width: 760px; }
.page-head p { color: var(--color-muted); font-size: 18px; }
.auth-panel { max-width: 520px; margin: 56px auto; padding: 32px; }
.account-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 24px;
    padding: 40px 0 72px;
}
.account-nav { padding: 12px; align-self: start; }
.account-nav a { display: block; padding: 12px; border-radius: 6px; text-decoration: none; color: var(--color-text); }
.account-nav a:hover { background: #eef5f3; color: var(--color-primary-dark); }
.account-content { padding: 28px; min-height: 360px; }
.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    padding: 36px 0;
    border-top: 1px solid var(--color-line);
    color: var(--color-muted);
}
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; align-content: start; }

@media (max-width: 860px) {
    .site-header { align-items: flex-start; padding: 18px 0; flex-direction: column; }
    .main-nav { flex-wrap: wrap; }
    .header-actions { width: 100%; justify-content: space-between; }
    .section-grid { grid-template-columns: 1fr; }
    .account-layout { grid-template-columns: 1fr; }
    .site-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .button { transition: none; }
    .button:hover { transform: none; }
}