:root {
    --bg: #0f1419;
    --surface: #1a2332;
    --border: #2d3a4f;
    --text: #e8edf4;
    --muted: #8b9cb3;
    --accent: #4f8cff;
    --accent-hover: #3a78eb;
    --danger: #ff6b6b;
    --radius: 10px;
    --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.header {
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.nav {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav__brand {
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.nav__links {
    display: flex;
    gap: 1rem;
}

.main {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.25rem;
}

.footer {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem 1.25rem 2rem;
    color: var(--muted);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.card--narrow {
    max-width: 420px;
}

.card h1 {
    margin-top: 0;
}

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

.posts {
    margin-top: 1.5rem;
    display: grid;
    gap: 0.75rem;
}

.post {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 2px);
    background: rgba(255, 255, 255, 0.02);
}

.post__title {
    margin: 0 0 0.25rem;
    font-size: 1.05rem;
}

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

.form {
    display: grid;
    gap: 1rem;
    margin-top: 1.25rem;
}

.form__field {
    display: grid;
    gap: 0.35rem;
}

.form__field span {
    font-size: 0.9rem;
    color: var(--muted);
}

input {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 2px);
    background: var(--bg);
    color: var(--text);
    font: inherit;
}

input:focus {
    outline: 2px solid rgba(79, 140, 255, 0.35);
    border-color: var(--accent);
}

.btn {
    padding: 0.65rem 1rem;
    border: none;
    border-radius: calc(var(--radius) - 2px);
    background: var(--accent);
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

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

.message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: calc(var(--radius) - 2px);
    background: rgba(255, 107, 107, 0.12);
    color: var(--danger);
}

.message--success {
    background: rgba(79, 140, 255, 0.12);
    color: var(--accent);
}

code {
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.9em;
}