:root {
    --petrol: #1f6f78;
    --petrol-dark: #13464c;
    --gold: #d4a64a;
    --gold-soft: #f1dfb6;
    --background: #f8fafa;
    --card: #ffffff;
    --text: #263238;
    --muted: #617176;
    --line: rgba(19, 70, 76, 0.18);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    color: var(--text);
    background: linear-gradient(180deg, #eef6f6 0%, var(--background) 38%, #ffffff 100%);
    line-height: 1.65;
}

.container {
    width: min(960px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 42px;
}

.nav {
    background: var(--petrol-dark);
    border-radius: 16px;
    padding: 10px 14px;
    box-shadow: 0 10px 30px rgba(19, 70, 76, 0.18);
}

.nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 18px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav a {
    display: inline-block;
    padding: 8px 10px;
    color: #ffffff;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    letter-spacing: 0.01em;
}

.nav a:hover,
.nav a[aria-current="page"] {
    color: var(--gold-soft);
    border-bottom-color: var(--gold);
}

.intro {
    margin: 34px 0 26px;
    padding: 48px 34px;
    background: linear-gradient(135deg, var(--petrol-dark), var(--petrol));
    color: #ffffff;
    border-radius: 22px;
    border-left: 8px solid var(--gold);
    box-shadow: 0 14px 38px rgba(19, 70, 76, 0.20);
}

.intro h1 {
    margin: 0;
    font-size: clamp(2.35rem, 7vw, 4.8rem);
    line-height: 1.02;
    letter-spacing: 0.015em;
}

.intro .claim {
    margin: 14px 0 0;
    font-size: clamp(1.05rem, 2.8vw, 1.45rem);
    color: var(--gold-soft);
}

.textblock { margin: 24px 0; }

.textblock h2 {
    color: var(--petrol-dark);
    font-size: 1.55rem;
    margin: 0 0 14px;
}

.box {
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 6px solid var(--gold);
    border-radius: 18px;
    padding: 24px 26px;
    box-shadow: 0 10px 28px rgba(31, 111, 120, 0.08);
}

.lead {
    font-size: 1.18rem;
    color: var(--petrol-dark);
}

ul { padding-left: 1.25rem; }

li { margin: 6px 0; }

a {
    color: var(--petrol-dark);
    text-decoration-color: var(--gold);
    text-underline-offset: 3px;
}

hr {
    border: none;
    border-top: 1px solid var(--line);
    margin: 32px 0;
}

.footer-note {
    margin-top: 14px;
    font-size: 0.9em;
    color: var(--muted);
    text-align: center;
}

.signature {
    margin-top: 18px;
    color: var(--petrol-dark);
    font-weight: bold;
}

@media (max-width: 640px) {
    .container { width: min(100% - 22px, 960px); padding-top: 14px; }
    .nav { border-radius: 12px; }
    .nav ul { display: block; text-align: center; }
    .nav a { padding: 7px 8px; }
    .intro { padding: 36px 24px; border-radius: 18px; }
    .box { padding: 20px; }
}