:root {
  --bg: #090b10;
  --panel: #121722;
  --panel-2: #181e2b;
  --line: #2a3344;
  --text: #edf2f8;
  --muted: #93a0b5;
  --accent: #ff3b30;
  --accent-ink: #1a0504;
  --danger: #ff8d86;
  color-scheme: dark;
  font-family: "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.02em; }
.mark {
  width: 18px; height: 18px; border-radius: 5px;
  background: linear-gradient(145deg, #ff6a62, var(--accent) 55%, #8d120c);
  box-shadow: 0 0 0 4px rgba(255, 59, 48, 0.15);
}

.btn {
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 10px 14px;
}
.btn.primary { background: var(--accent); color: white; border-color: transparent; font-weight: 650; }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }
.btn:disabled { opacity: 0.55; cursor: wait; }

.gate {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(600px 280px at 50% 0%, rgba(255, 59, 48, 0.18), transparent 70%),
    var(--bg);
}
.gate-card { width: min(560px, 100%); }
.eyebrow { color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; font-size: 12px; }
h1 { font-size: 42px; line-height: 1.05; margin: 8px 0; }
.lede, .code-label, .hint, .panel-copy p { color: var(--muted); line-height: 1.5; }
.code {
  font-family: Consolas, monospace;
  font-size: 28px;
  letter-spacing: 0.18em;
  margin: 8px 0 16px;
}
label { display: block; margin: 12px 0 6px; color: var(--muted); }
input, textarea, select {
  width: 100%;
  background: #0d1118;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}
textarea { resize: vertical; }
.error { color: var(--danger); min-height: 1.2em; }
#gate-create, #gate-show, #gate-enter { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
#gate-enter { display: block; }

.app { height: 100%; display: grid; grid-template-columns: 280px 1fr; }
.side {
  border-right: 1px solid var(--line);
  background: #0d1118;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
}
.side-nav, .history { display: flex; flex-direction: column; gap: 6px; }
a.nav-btn { display: block; text-decoration: none; }
.nav-btn, .hist-btn {
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--muted);
}
.nav-btn.active, .hist-btn.active, .nav-btn:hover, .hist-btn:hover { background: var(--panel); color: var(--text); }
.history { overflow: auto; flex: 1; }
.history-head { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}
.top h2 { margin: 0; font-size: 18px; }
.top p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.top-controls { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.select-wrap { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); min-width: 180px; }
.toggle { display: flex; gap: 8px; align-items: center; color: var(--text); }
.toggle input { width: auto; }

.panel { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.panel-copy { padding: 20px; max-width: 720px; }
.thread { flex: 1; overflow: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 760px; line-height: 1.5; }
.msg.user { align-self: flex-end; background: #2a1214; border: 1px solid #5c2428; border-radius: 14px 14px 4px 14px; padding: 10px 14px; }
.msg.assistant { align-self: flex-start; }
.msg .who { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.msg img { max-width: min(100%, 480px); border-radius: 12px; display: block; margin-top: 8px; }
.msg pre { overflow: auto; background: #0d1118; padding: 10px; border-radius: 0 0 8px 8px; margin: 0; }
.msg code { font-family: Consolas, monospace; }
.code-block { margin: 8px 0; border: 1px solid var(--line); border-radius: 8px; max-width: 760px; }
.code-bar { display: flex; gap: 8px; align-items: center; padding: 6px 8px; background: #10151f; border-radius: 8px 8px 0 0; }
.code-bar span { color: var(--muted); font-size: 12px; margin-right: auto; }
.code-bar button { padding: 4px 8px; border-radius: 6px; }
.code-out { border-top: 1px solid var(--line); color: #c9d6c4; white-space: pre-wrap; }
.ide { min-height: 0; }
.ide-bar, .ide-ask { display: flex; gap: 8px; align-items: center; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.ide-bar input, .ide-ask input { width: auto; flex: 1; padding: 8px 10px; }
#ide-current { white-space: nowrap; }
.ide-body { flex: 1; min-height: 0; display: grid; grid-template-columns: 200px 1fr; }
.ide-files { overflow: auto; border-right: 1px solid var(--line); padding: 8px; }
.file-row { display: flex; align-items: center; gap: 4px; }
.file-row button.file-open { flex: 1; text-align: left; background: transparent; border: 0; color: var(--muted); border-radius: 6px; padding: 6px 8px; }
.file-row.active button.file-open, .file-row button.file-open:hover { background: var(--panel); color: var(--text); }
.file-row .file-del { border: 0; background: transparent; color: var(--muted); padding: 4px 6px; }
#ide-editor {
  height: 100%;
  border: 0;
  border-radius: 0;
  resize: none;
  font-family: Consolas, monospace;
  font-size: 14px;
  line-height: 1.45;
  tab-size: 2;
}
.ide-out {
  margin: 0;
  height: 140px;
  overflow: auto;
  padding: 10px 12px;
  background: #07090d;
  color: #d5e6d2;
  font-family: Consolas, monospace;
  font-size: 13px;
  white-space: pre-wrap;
}
.key-actions { display: flex; gap: 10px; margin-top: 12px; }
#openai-key { max-width: 520px; }
.status { color: var(--muted); font-size: 13px; }
.empty { color: var(--muted); max-width: 560px; }
.empty button { margin: 6px 6px 0 0; }

.composer { display: flex; gap: 10px; padding: 14px 20px 18px; border-top: 1px solid var(--line); }
.composer textarea { flex: 1; }
.prompt-list { display: flex; flex-direction: column; gap: 8px; }
.prompt-list button { text-align: left; }
.agent-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; margin-top: 12px; }
.agent-card { text-align: left; border: 1px solid var(--line); background: #0d1118; border-radius: 12px; padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.agent-card strong { font-size: 15px; }
.agent-card span { color: var(--muted); font-size: 13px; line-height: 1.4; }
.agent-card.active { border-color: var(--accent); }

@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .side { border-right: 0; border-bottom: 1px solid var(--line); }
  .history { max-height: 120px; }
  h1 { font-size: 32px; }
  .top { flex-direction: column; align-items: stretch; }
  .ide-body { grid-template-columns: 1fr; }
  .ide-files { max-height: 120px; border-right: 0; border-bottom: 1px solid var(--line); }
}