:root {
  color-scheme: light dark;
  --bg: #f5f7f4;
  --panel: #ffffff;
  --text: #162019;
  --muted: #617062;
  --line: #d8dfd5;
  --accent: #176b56;
  --accent-strong: #0d4e3e;
  --ok: #0f7b45;
  --warn: #a54f12;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(23, 107, 86, 0.12), transparent 38%),
    radial-gradient(circle at 80% 12%, rgba(189, 76, 53, 0.13), transparent 24%),
    var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.shell {
  width: min(880px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.panel {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(22, 32, 25, 0.12);
  padding: 24px;
}

.topbar,
.meta-row,
.composer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar {
  justify-content: space-between;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  line-height: 1.05;
}

.status {
  min-width: 96px;
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 8px 12px;
  color: var(--warn);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
}

.status.ok {
  color: var(--ok);
}

.composer {
  align-items: stretch;
  margin-bottom: 18px;
}

input {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  color: var(--text);
  padding: 14px 16px;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 750;
  padding: 0 18px;
}

button:hover {
  background: var(--accent-strong);
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  padding: 8px 12px;
}

.ghost:hover {
  background: rgba(23, 107, 86, 0.08);
}

.meta-row {
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.92rem;
}

.messages {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.message {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  padding: 14px;
}

.message p {
  margin: 0;
}

.message time {
  color: var(--muted);
  font-size: 0.82rem;
}

.empty {
  color: var(--muted);
  padding: 22px 0;
  text-align: center;
}

@media (max-width: 620px) {
  .shell {
    width: min(100vw - 20px, 880px);
    padding: 20px 0;
  }

  .panel {
    padding: 18px;
  }

  .topbar,
  .composer {
    align-items: stretch;
    flex-direction: column;
  }

  .status {
    min-width: 0;
  }

  button {
    min-height: 46px;
  }
}