:root {
    --bg: #0f1115;
    --bg-elev: #171a21;
    --bg-elev-2: #1e222b;
    --border: #2a2f3a;
    --text: #e6e9ef;
    --text-dim: #9aa3b2;
    --accent: #6ea8fe;
    --accent-strong: #4d8ef7;
    --danger: #ff6b6b;
    --ok: #4ade80;
    --warn: #fbbf24;
    --radius: 10px;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

body { display: flex; flex-direction: column; }

code, pre, .mono { font-family: var(--mono); font-size: 0.86em; }

code {
    background: var(--bg-elev-2);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 1px 5px;
}

.muted { color: var(--text-dim); }
.small { font-size: 0.83rem; }

/* ---------------------------------------------------------------- topbar */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-elev);
    flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 1.02rem; margin: 0; font-weight: 600; letter-spacing: 0.2px; }

.dot {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--text-dim);
    box-shadow: 0 0 0 3px rgb(255 255 255 / 4%);
}
.dot.up { background: var(--ok); }
.dot.down { background: var(--danger); }

.meta { color: var(--text-dim); font-size: 0.83rem; font-family: var(--mono); text-align: right; }

/* --------------------------------------------------------------- banner */

.banner {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 10px 20px;
    background: rgb(251 191 36 / 12%);
    border-bottom: 1px solid rgb(251 191 36 / 35%);
    color: #ffdf9e;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------- layout */

.layout {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 16px;
    padding: 16px;
    min-height: 0;
}

@media (max-width: 900px) {
    .layout { grid-template-columns: minmax(0, 1fr); }
}

.panel {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.panel-head {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}
.panel-head h2 { font-size: 0.92rem; margin: 0; font-weight: 600; }

.session-info { display: flex; align-items: center; gap: 10px; }

.pill {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 3px 9px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-elev-2);
    color: var(--text-dim);
}
.pill.live { color: var(--ok); border-color: rgb(74 222 128 / 45%); }
.pill.term { color: var(--text-dim); }

/* ------------------------------------------------------------- messages */

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 160px;
}

.empty { color: var(--text-dim); font-size: 0.9rem; margin: 0; }

.msg { display: flex; flex-direction: column; gap: 4px; max-width: 92%; }
.msg .who { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); }
.msg .body {
    padding: 9px 12px;
    border-radius: 10px;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px solid var(--border);
    background: var(--bg-elev-2);
}
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.user .body { background: rgb(110 168 254 / 16%); border-color: rgb(110 168 254 / 40%); }
.msg.system .body { background: transparent; border-style: dashed; color: var(--text-dim); font-size: 0.86rem; }

/* ------------------------------------------------------------- composer */

.composer {
    border-top: 1px solid var(--border);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.composer textarea {
    width: 100%;
    resize: vertical;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
}
.composer textarea:focus { outline: none; border-color: var(--accent); }

.composer-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
    border: 1px solid var(--border);
    background: var(--bg-elev-2);
    color: var(--text);
    padding: 8px 14px;
    border-radius: 8px;
    font: inherit;
    font-size: 0.88rem;
    cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-sm { padding: 5px 11px; font-size: 0.82rem; }
.btn-primary { background: var(--accent-strong); border-color: var(--accent-strong); color: #08111f; font-weight: 600; }
.btn-primary:hover:not(:disabled) { background: var(--accent); }
.btn-danger { color: var(--danger); border-color: rgb(255 107 107 / 40%); }

/* ------------------------------------------------------------- info pane */

.info-panel { padding-bottom: 8px; overflow-y: auto; }
.info-panel .panel-head { border-bottom: 1px solid var(--border); }
.info-panel > p { margin: 12px 16px 0; }

.facts { margin: 12px 16px 0; display: grid; grid-template-columns: auto; gap: 7px; }
.facts div { display: flex; justify-content: space-between; gap: 10px; font-size: 0.82rem; }
.facts dt { color: var(--text-dim); margin: 0; }
.facts dd { margin: 0; font-family: var(--mono); text-align: right; word-break: break-all; }

.log-head {
    display: flex; align-items: center; justify-content: space-between;
    margin: 18px 16px 6px;
}
.log-head h3 { font-size: 0.82rem; margin: 0; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }

.reqlog {
    list-style: none;
    margin: 0;
    padding: 0 16px 12px;
    font-family: var(--mono);
    font-size: 0.76rem;
    display: flex;
    flex-direction: column-reverse;
    gap: 3px;
}
.reqlog li { display: flex; gap: 8px; color: var(--text-dim); }
.reqlog .code-ok { color: var(--ok); }
.reqlog .code-err { color: var(--danger); }

/* ---------------------------------------------------------------- modal */

.modal-backdrop {
    position: fixed; inset: 0;
    background: rgb(0 0 0 / 62%);
    display: grid; place-items: center;
    padding: 20px;
    z-index: 20;
}
.modal-backdrop[hidden] { display: none; }

.modal {
    width: min(420px, 100%);
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.modal h2 { margin: 0; font-size: 1.05rem; }
.modal p { margin: 0; }
.modal input {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
}
.modal input:focus { outline: none; border-color: var(--accent); }
.error { color: var(--danger); font-size: 0.86rem; margin: 0; }
.error[hidden] { display: none; }

/* ---------------------------------------------------------- preview pane */

.preview-panel { min-height: 0; }

.preview-panel iframe {
    flex: 1;
    width: 100%;
    border: 0;
    background: #fff;
    min-height: 320px;
}

#preview-pill { font-family: var(--mono); text-transform: none; letter-spacing: 0; }

/* ------------------------------------------------------------- underhood */

.underhood {
    border-top: 1px solid var(--border);
    padding: 10px 16px 12px;
    max-height: 40%;
    overflow-y: auto;
}

.underhood > summary {
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.underhood > p { margin: 10px 0 0; }
.underhood .facts { margin: 10px 0 0; }
.underhood .log-head { margin: 14px 0 6px; }
.underhood .reqlog { padding: 0; }