:root {
  --bg: #14201c;
  --bg-2: #1b2a24;
  --panel: #20332c;
  --ink: #e8f0ea;
  --muted: #9eb0a6;
  --line: rgba(232, 240, 234, 0.12);
  --accent: #d6a45a;
  --accent-ink: #1a1408;
  --danger: #e07a5f;
  --ok: #7dcea0;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, #2a4538 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #3a2f1c 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
}

.app {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr) minmax(300px, 380px);
  height: 100vh;
  min-height: 560px;
}

.rail,
.agent {
  background: color-mix(in srgb, var(--bg-2) 88%, black);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.agent {
  border-right: 0;
  border-left: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 18px 16px 10px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--accent), #8f6a2f);
  color: var(--accent-ink);
  font-family: var(--serif);
  font-weight: 700;
}

.brand-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.1;
}

.brand-sub {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 12px;
  font: 500 0.9rem var(--sans);
  cursor: pointer;
}

.btn:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
}

.btn.ghost {
  margin: 0 16px 8px;
}

.status {
  padding: 0 16px 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--mono);
}

.mail-list {
  list-style: none;
  margin: 0;
  padding: 0 8px 16px;
  overflow: auto;
  flex: 1;
}

.mail-list li button {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 10px 10px;
  border-radius: 10px;
  cursor: pointer;
  display: grid;
  gap: 4px;
}

.mail-list li button:hover,
.mail-list li button.active {
  background: color-mix(in srgb, var(--panel) 80%, white 4%);
}

.mail-list .from {
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mail-list .subject {
  font-weight: 600;
  font-size: 0.92rem;
}

.mail-list .date {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.reader {
  min-width: 0;
  overflow: auto;
  padding: 28px 36px 48px;
}

.empty {
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.4rem;
  margin-top: 20vh;
  text-align: center;
}

.message header h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  margin: 0 0 16px;
}

.meta {
  display: grid;
  gap: 6px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.meta span {
  display: inline-block;
  min-width: 52px;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.meta strong {
  color: var(--ink);
  font-weight: 500;
}

.body {
  white-space: pre-wrap;
  line-height: 1.55;
  font-size: 1rem;
  max-width: 70ch;
}

.agent-head {
  padding: 18px 16px 12px;
  border-bottom: 1px solid var(--line);
}

.agent-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
}

.agent-head p {
  margin: 6px 0 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

.field {
  display: grid;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--muted);
}

.field select {
  width: 100%;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font: 500 0.85rem var(--sans);
}

.ollama-hint {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.ollama-hint.ok {
  color: var(--ok);
}

.ollama-hint.bad {
  color: var(--danger);
}

.chat {
  flex: 1;
  overflow: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bubble {
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 0.9rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.bubble.user {
  background: color-mix(in srgb, var(--accent) 22%, var(--panel));
  align-self: flex-end;
  max-width: 92%;
}

.bubble.assistant {
  background: var(--panel);
  border: 1px solid var(--line);
  align-self: stretch;
}

.bubble.error {
  border-color: color-mix(in srgb, var(--danger) 50%, var(--line));
  color: #ffd4c8;
}

.composer {
  padding: 12px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.composer textarea {
  resize: vertical;
  min-height: 72px;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: 400 0.92rem var(--sans);
}

@media (max-width: 1100px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    height: auto;
    min-height: 100vh;
  }

  .rail,
  .agent {
    max-height: 40vh;
  }
}