:root {
    color-scheme: light dark;
    --text: #102a35;
    --muted: #55707a;
    --background: #f7f3ea;
    --surface: #fffdf8;
    --line: #e4dccb;
    --sea: #123a4a;
    --teal: #2a9d97;
    --link: #1f7f7a;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text: #ece6d8;
        --muted: #9fb2b5;
        --background: #0b1c23;
        --surface: #10262f;
        --line: #1f3a44;
        --link: #6fd3cd;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a {
    color: var(--link);
}

.page {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 16px;
}

header {
    padding: 28px 0;
}

header a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 19px;
    text-decoration: none;
}

header img {
    width: 34px;
    height: 34px;
}

.hero {
    padding: 56px 0 64px;
}

.hero h1 {
    margin: 0 0 20px;
    max-width: 640px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(38px, 6vw, 58px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.hero p {
    max-width: 560px;
    margin: 0;
    color: var(--muted);
    font-size: 20px;
}

.waves {
    display: block;
    width: 100%;
    height: 40px;
    margin-bottom: 56px;
    color: var(--teal);
    opacity: 0.6;
}

h2 {
    margin: 0 0 20px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 28px;
    font-weight: 400;
}

.apps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 72px;
}

.app {
    display: flex;
    gap: 18px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
    transition: transform 0.2s, border-color 0.2s;
}

.app:hover {
    border-color: var(--teal);
    transform: translateY(-2px);
}

.app img {
    width: 64px;
    height: 64px;
    flex: none;
    border-radius: 16px;
}

.app h3 {
    margin: 2px 0 4px;
    font-size: 20px;
}

.app p {
    margin: 0;
    color: var(--muted);
}

.principles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin: 0 0 72px;
    padding: 0;
    list-style: none;
}

.principles strong {
    display: block;
    margin-bottom: 4px;
}

.principles span {
    color: var(--muted);
}

footer {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
    padding: 28px 0 48px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 15px;
}

footer a {
    color: var(--muted);
}

@media (max-width: 700px) {
    .apps,
    .principles {
        grid-template-columns: 1fr;
    }
}