/* Hopper — the Brokerage Brain. Clean, calm, chat-centered. */
:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --ink: #23302c;
  --ink-soft: #5f6e68;
  --line: #e4e2dc;
  --accent: #1a5c4e;        /* deep evergreen — steady, trustworthy */
  --accent-ink: #ffffff;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161b19;
    --surface: #1f2624;
    --ink: #e8ebe9;
    --ink-soft: #9aa8a2;
    --line: #2c3532;
    --accent: #3f9c86;
    --accent-ink: #0d1512;
  }
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.55 "Inter", -apple-system, system-ui, sans-serif;
  min-height: 100vh;
}
.wordmark {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 700; font-size: 2.2rem; color: var(--accent); letter-spacing: -0.02em;
}
.wordmark.small { font-size: 1.25rem; }

/* auth */
.auth { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.auth-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 44px 40px; width: min(420px, 100%); text-align: center;
  box-shadow: 0 8px 30px rgba(20, 40, 35, 0.06);
}
.tagline { color: var(--ink-soft); margin: 4px 0 28px; font-size: 0.95rem; }
.auth-card form { display: grid; gap: 10px; text-align: left; }
.auth-card label { font-size: 0.8rem; font-weight: 600; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.06em; }
.auth-card input {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg); color: var(--ink); font: inherit;
}
.auth-card input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.auth-card button {
  margin-top: 6px; padding: 12px; border: 0; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; cursor: pointer;
}
.auth-card button:hover { filter: brightness(1.07); }
.notice { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; font-size: 0.95rem; }
.notice.dev { margin-top: 10px; }
.fine { color: var(--ink-soft); font-size: 0.85rem; margin-top: 16px; }
.fine a, nav a { color: var(--accent); }
.byline { margin-top: 30px; color: var(--ink-soft); font-size: 0.78rem; letter-spacing: 0.04em; }

/* app shell */
.shell { display: flex; flex-direction: column; min-height: 100vh; }
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 22px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.topbar .context { color: var(--ink-soft); font-size: 0.95rem; flex: 1; }
.topbar nav a { text-decoration: none; font-size: 0.9rem; }

.chat-area { flex: 1; display: flex; flex-direction: column; width: min(760px, 100%); margin: 0 auto; padding: 28px 18px 18px; }
.thread { flex: 1; display: grid; gap: 14px; align-content: start; }
.msg {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; max-width: 62ch;
}
.msg p + p { margin-top: 10px; }
.composer { display: flex; gap: 10px; padding-top: 18px; }
.composer input {
  flex: 1; padding: 13px 16px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); color: var(--ink); font: inherit;
}
.composer button {
  padding: 0 22px; border: 0; border-radius: 999px; background: var(--accent);
  color: var(--accent-ink); font: inherit; font-weight: 600;
}
.composer input:disabled, .composer button:disabled { opacity: 0.55; }