:root { --line: #dfe3e8; --muted: #6b7280; --accent: #2d6cdf; }

* { box-sizing: border-box; }

body { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; margin: 0;
       background: #fff; color: #1f2328; line-height: 1.55; }

.wrap { max-width: 640px; margin: 0 auto; padding: 0 20px; }

header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 600; text-decoration: none; color: inherit; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--accent); }

main { padding: 48px 0 64px; }
h1 { font-size: 27px; margin: 0 0 12px; }
p { color: var(--muted); margin: 0 0 16px; }
a { color: var(--accent); }
.lead { margin: 0 0 28px; }

label { display: block; font-size: 14px; margin-bottom: 6px; color: #1f2328; }
input, textarea { width: 100%; font: inherit; padding: 10px 12px;
                  border: 1px solid var(--line); border-radius: 8px; margin-bottom: 18px; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { min-height: 130px; resize: vertical; }

button { font: inherit; padding: 11px 22px; border: none; border-radius: 8px;
         background: var(--accent); color: #fff; cursor: pointer; }
button:hover { background: #2559b8; }
button[disabled] { opacity: .6; cursor: default; }

.field-row { display: flex; align-items: baseline; justify-content: space-between; }
.link-btn { background: none; border: none; padding: 0; color: var(--muted);
            font: inherit; font-size: 13px; line-height: 1; cursor: pointer; width: auto; }
.link-btn:hover { background: none; color: var(--accent); text-decoration: underline; }

.env { border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin-bottom: 14px; }
.env h2 { font-size: 17px; margin: 0 0 4px; }
.env h2 a { color: var(--accent); text-decoration: none; }
.env h2 a:hover { text-decoration: underline; }
.env p { margin: 0; font-size: 14px; }

.note { font-size: 14px; margin-top: 18px; }
.done { border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.done h2 { font-size: 18px; margin: 0 0 8px; }
.done p { margin: 0 0 14px; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0; }