:root { --ink: #1F2328; --muted: #62676E; --line: #E3E1DC; --bg: #F2F1EE; --card: #FFFFFF; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; }
main { max-width: 920px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 26px; margin: 0 0 4px; text-wrap: balance; }
h2 { font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 28px 0 10px; }
.sub { color: var(--muted); margin: 0 0 16px; }
.box { max-width: 380px; margin: 12vh auto 0; background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 24px; }
form { display: grid; gap: 10px; }
label { font-size: 13px; color: var(--muted); }
input, button { font: inherit; }
input { padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); min-width: 0; }
button { padding: 10px 14px; border: 1px solid var(--ink); border-radius: 10px; background: var(--ink); color: #fff; cursor: pointer; }
button:disabled { opacity: .5; cursor: default; }
button.link { padding: 0; border: 0; background: none; color: var(--ink); text-decoration: underline; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.bar { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: space-between;
  margin-bottom: 20px; font-size: 14px; }
.bar form { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bar input { padding: 6px 8px; } .bar form button { padding: 6px 12px; }
.who { color: var(--muted); margin-left: auto; overflow-wrap: anywhere; }
.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.list button { width: 100%; text-align: left; background: var(--card); color: var(--ink);
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
iframe { width: 100%; height: 80vh; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.message { color: #9A2B2B; text-align: center; min-height: 1.5em; margin: 0 0 8px; }
[hidden] { display: none !important; }