:root {
  --bg: #f3f5f8; --panel: #ffffff; --panel-2: #f7f9fb; --text: #15202b; --muted: #5d6b7b; --line: #dde3ea;
  --accent: #1f5fa8; --accent-2: #e5eff9; --accent-text: #ffffff; --logo-bg: #1f5fa8; --logo-grid: rgb(255 255 255 / .22); --ok: #16794a; --ok-bg: #e5f5ec;
  --bad: #b42318; --bad-bg: #fdecea; --warn-bg: #fff6dc; --user: #e5eff9; --code: #f1f4f8; --viewer: #e8edf3;
  --shadow: 0 1px 2px rgb(16 24 40 / .05), 0 1px 3px rgb(16 24 40 / .08);
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1318; --panel: #171c22; --panel-2: #1c222a; --text: #e6eaef; --muted: #95a1ae; --line: #2a323c;
    --accent: #5cb6ee; --accent-2: #12293d; --accent-text: #06131f; --logo-bg: #1f5fa8; --logo-grid: rgb(255 255 255 / .22); --ok: #4cc38a; --ok-bg: #12291f;
    --bad: #ff8a80; --bad-bg: #3a1a18; --warn-bg: #3a3220; --user: #16324a; --code: #1f262f; --viewer: #1b2128;
    --shadow: 0 1px 2px rgb(0 0 0 / .4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1318; --panel: #171c22; --panel-2: #1c222a; --text: #e6eaef; --muted: #95a1ae; --line: #2a323c;
  --accent: #5cb6ee; --accent-2: #12293d; --accent-text: #06131f; --logo-bg: #1f5fa8; --logo-grid: rgb(255 255 255 / .22); --ok: #4cc38a; --ok-bg: #12291f;
  --bad: #ff8a80; --bad-bg: #3a1a18; --warn-bg: #3a3220; --user: #16324a; --code: #1f262f; --viewer: #1b2128;
  --shadow: 0 1px 2px rgb(0 0 0 / .4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font: 14px/1.5 Inter, system-ui, -apple-system, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
.hidden { display: none !important; }
.grow { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.err { color: var(--bad); min-height: 1em; margin: 8px 0 0; white-space: pre-wrap; }
.err:empty { display: none; }
.ok { color: var(--ok); margin: 6px 0 0; }
.ok:empty { display: none; }
.warn { background: var(--warn-bg); padding: 10px 12px; border-radius: 8px; margin: 0 0 12px; }
a { color: var(--accent); }
h1, h2, h3 { margin: 0 0 12px; letter-spacing: -.01em; }
h2 { font-size: 20px; } h3 { font-size: 15px; }
code, pre, .mono { font-family: "JetBrains Mono", ui-monospace, monospace; }

button, select, input, textarea {
  font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 11px;
}
input, textarea, select { width: 100%; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); outline: 3px solid var(--accent-2); outline-offset: 0; }
button { cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; font-weight: 500; white-space: nowrap; }
button:hover { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
button:focus-visible { outline: 3px solid var(--accent-2); border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.primary:hover { filter: brightness(1.07); }
button.ghost { background: transparent; border-color: transparent; }
button.ghost:hover { background: var(--panel-2); border-color: var(--line); }
button.wide { width: 100%; padding: 10px; }
button.link { background: none; border: none; padding: 2px 4px; color: var(--muted); font-weight: 400; }
button.danger:hover { color: var(--bad); }
button.small-btn { padding: 4px 8px; font-size: 12px; }
textarea { resize: vertical; }
label { display: flex; flex-direction: column; gap: 5px; margin: 0 0 12px; font-weight: 500; font-size: 13px; }
.ico { width: 16px; height: 16px; flex: none; }
.ico-lg { width: 28px; height: 28px; color: var(--accent); }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.screen { height: 100%; }
.row { display: flex; gap: 8px; justify-content: flex-end; }

/* auth */
#auth { display: grid; place-items: center; padding: 16px; background-color: var(--bg);
  background-image: radial-gradient(circle at 50% 30%, transparent, var(--bg) 70%),
    linear-gradient(var(--accent-2) 1px, transparent 1px), linear-gradient(90deg, var(--accent-2) 1px, transparent 1px);
  background-size: 100% 100%, 24px 24px, 24px 24px; }
.auth-wrap { width: min(380px, 100%); }
.auth-brand { text-align: center; margin-bottom: 20px; }
.logo-lg { width: 48px; height: 48px; }
.auth-brand .brand-name { font-size: 26px; margin: 10px 0 4px; }
.auth-card h2 { font-size: 17px; }

/* top bar */
#main { display: flex; flex-direction: column; }
.topbar { display: flex; gap: 8px; align-items: center; padding: 8px 16px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); margin-right: 8px; }
.logo { width: 26px; height: 26px; }
.brand-name { font-weight: 700; letter-spacing: -.02em; font-size: 16px; }
.topbar select { width: auto; max-width: 300px; }
.chip { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); }
.chip.low { background: var(--warn-bg); color: var(--text); }
.chip:empty { display: none; }
.menu-wrap { position: relative; }
.menu { position: absolute; right: 0; top: calc(100% + 4px); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgb(0 0 0 / .15); padding: 4px; z-index: 20; min-width: 170px; }
.menu button { display: flex; width: 100%; justify-content: flex-start; border: none; background: none; padding: 8px 10px; }
.menu button:hover { background: var(--panel-2); }
.view { flex: 1; min-height: 0; }

/* new project */
#new-view { overflow: auto; padding: 32px 16px; }
.new-layout { max-width: 1040px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.1fr; gap: 32px; align-items: start; }
.hero h2 { font-size: 26px; line-height: 1.2; }
.hero p { font-size: 15px; }
.steps { padding-left: 18px; margin: 18px 0 0; display: grid; gap: 8px; }
.steps li::marker { color: var(--accent); font-weight: 700; }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 26px 16px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 4px; cursor: pointer; margin: 0 0 10px; background: var(--panel-2); transition: border-color .15s, background .15s; }
.drop.over, .drop:hover, .drop:focus-visible { border-color: var(--accent); background: var(--accent-2); outline: none; }
.file-list { list-style: none; padding: 0; margin: 0 0 10px; }
.file-list li { display: flex; justify-content: space-between; align-items: center; padding: 5px 0; border-bottom: 1px solid var(--line); }

/* project */
#project-view { display: grid; grid-template-columns: minmax(320px, 2fr) 3fr; min-height: 0; }
.chat-col { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--line); background: var(--panel); }
.chat-head { display: flex; gap: 8px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.chat-title { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.chat-title strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { font-size: 12px; padding: 2px 9px; border-radius: 999px; background: var(--code); color: var(--muted); }
.badge.working { background: var(--accent); color: var(--accent-text); }
.badge.error { background: var(--bad-bg); color: var(--bad); }
.badge.idle { background: var(--ok-bg); color: var(--ok); }
.events { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.ev { border-radius: 10px; padding: 9px 12px; overflow-wrap: anywhere; }
.ev.user { background: var(--user); align-self: flex-end; max-width: 90%; white-space: pre-wrap; border-bottom-right-radius: 3px; }
.ev.assistant { background: var(--panel-2); border: 1px solid var(--line); border-bottom-left-radius: 3px; }
.ev.status { color: var(--muted); font-size: 12px; padding: 0 2px; }
.ev.error { background: var(--bad-bg); color: var(--bad); white-space: pre-wrap; }
.ev.run { border: 1px solid var(--line); font-size: 13px; cursor: pointer; background: var(--panel); }
.ev.run:hover { border-color: var(--accent); }
.ev.run .tag { font-weight: 600; }
.ev.run .tag.ok { color: var(--ok); } .ev.run .tag.bad { color: var(--bad); }
.ev details summary { cursor: pointer; color: var(--muted); font-size: 12px; }
.ev details div { white-space: pre-wrap; font-size: 12px; color: var(--muted); margin-top: 4px; }
.ev p { margin: 0 0 6px; } .ev p:last-child { margin: 0; }
.ev ul { margin: 4px 0; padding-left: 20px; }
.ev code { background: var(--code); padding: 1px 4px; border-radius: 4px; font-size: 12px; }
.typing { color: var(--muted); font-size: 12px; display: flex; gap: 8px; align-items: center; }
.typing::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .typing::before { animation: none; } }
.chat-form { display: flex; gap: 8px; padding: 10px 14px; border-top: 1px solid var(--line); align-items: flex-end; }
.icon-btn { flex: none; width: 40px; height: 40px; padding: 0; }

.result-col { display: flex; flex-direction: column; min-height: 0; overflow: auto; }
.version-bar { display: flex; gap: 12px; align-items: center; padding: 10px 14px; flex-wrap: wrap; }
.version-bar label { flex-direction: row; align-items: center; margin: 0; }
.version-bar select { width: auto; }
.viewer { position: relative; height: 46vh; min-height: 280px; margin: 0 14px; border-radius: var(--radius); background: var(--viewer); overflow: hidden; flex: none; border: 1px solid var(--line); }
.viewer canvas { display: block; }
.viewer-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); padding: 16px; text-align: center; }
.viewer-tools { position: absolute; top: 8px; left: 8px; display: flex; gap: 4px; flex-wrap: wrap; }
.viewer-tools button { padding: 4px 9px; font-size: 12px; opacity: .94; }
.viewer-tools button.active { border-color: var(--accent); color: var(--accent); }
.viewer-foot { position: absolute; left: 8px; right: 8px; bottom: 6px; display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--muted); pointer-events: none; }
.part-toggles { display: flex; gap: 10px; flex-wrap: wrap; pointer-events: auto; }
.part-toggles label { flex-direction: row; align-items: center; gap: 4px; margin: 0; font-weight: 400; font-size: 12px; }
.part-toggles input { width: auto; }
.dims { padding: 6px 14px; font-size: 12px; font-variant-numeric: tabular-nums; }
.tabs { display: flex; gap: 2px; padding: 0 14px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tabs button { border: none; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 9px 10px; color: var(--muted); }
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
.tabs button:hover { color: var(--text); }
.tab-body { padding: 14px 14px 28px; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-weight: 600; color: var(--muted); font-size: 12px; }
td.num, th.num { font-variant-numeric: tabular-nums; text-align: right; }
.table-wrap { overflow-x: auto; }
.pass { color: var(--ok); font-weight: 600; } .fail { color: var(--bad); font-weight: 600; }
.drawing-img { width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.page-img { width: 100%; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 10px; background: #fff; }
.files { display: grid; gap: 6px; }
.files h4 { margin: 10px 0 2px; }
.dl-row { display: flex; gap: 6px; flex-wrap: wrap; }
.dl { display: inline-flex; padding: 5px 10px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; color: var(--text); font-size: 13px; background: var(--panel); }
.dl:hover { border-color: var(--accent); color: var(--accent); }
pre.code { background: var(--code); padding: 10px; border-radius: 8px; overflow: auto; font-size: 12px; max-height: 50vh; }

/* admin */
#admin-view { overflow: auto; }
.admin-wrap { max-width: 1100px; margin: 0 auto; padding: 24px 16px 40px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.admin-head { display: flex; align-items: flex-end; gap: 16px; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.admin-head h2 { margin: 0 0 8px; }
.admin-head .tabs { border-bottom: none; padding: 0; }
.atab { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.inline-form { display: grid; grid-template-columns: repeat(4, minmax(140px, 1fr)) auto; gap: 10px; align-items: end; }
.inline-form label { margin: 0; }
.input-row { display: flex; gap: 6px; }
.input-row input { min-width: 0; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.tile .v { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.tile .k { color: var(--muted); font-size: 12px; }
.settings-card { max-width: 620px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pill { font-size: 11px; padding: 1px 7px; border-radius: 999px; background: var(--code); color: var(--muted); }
.pill.admin { background: var(--accent-2); color: var(--accent); }
.pill.off { background: var(--bad-bg); color: var(--bad); }
.actions { display: flex; gap: 4px; justify-content: flex-end; flex-wrap: wrap; }
.actions button { padding: 3px 8px; font-size: 12px; }
.bar { height: 6px; border-radius: 3px; background: var(--code); overflow: hidden; min-width: 60px; }
.bar > span { display: block; height: 100%; background: var(--accent); }

a.btnlink { display: inline-flex; align-items: center; gap: 6px; padding: 8px 11px; border-radius: 8px; border: 1px solid transparent; color: var(--text); text-decoration: none; font-weight: 500; }
a.btnlink:hover { background: var(--panel-2); border-color: var(--line); }
.notice { background: var(--warn-bg); color: var(--text); padding: 10px 16px; text-align: center; font-weight: 500; border-bottom: 1px solid var(--line); }

/* material tab */
.mat-head { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; margin: 0 0 10px; }
.warn-text { color: var(--bad); font-weight: 600; }
.calc { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); margin-bottom: 14px; }
.calc label { margin: 0; }
.calc .input-row input { min-width: 0; }
.mat-card { border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-bottom: 14px; background: var(--panel); }
.mat-title { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.mat-title h4 { margin: 0; }
.flat-preview { display: block; width: 100%; max-height: 260px; object-fit: contain; background: #fff; border: 1px solid var(--line); border-radius: 8px; margin: 10px 0; padding: 10px; }
.mat-kv { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; margin: 10px 0; font-size: 13px; }
.mat-kv dt { color: var(--muted); } .mat-kv dd { margin: 0; font-variant-numeric: tabular-nums; }
.mat-result { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; border-top: 1px solid var(--line); padding-top: 12px; }
.mat-result > div { display: flex; flex-direction: column; }
.mat-result .big { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }

/* auth extras */
a.auth-brand { display: block; color: inherit; text-decoration: none; }
.auth-foot { text-align: center; font-size: 13px; margin-top: 14px; }
.auth-foot a { color: var(--muted); }
.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 16px; }
.seg button { border: none; background: none; padding: 7px; color: var(--muted); }
.seg button.active { background: var(--panel); color: var(--text); box-shadow: var(--shadow); }
label.check { flex-direction: row; align-items: center; gap: 8px; }
label.check input { width: auto; }

/* billing */
.balance { padding: 4px 4px 4px 12px; border-radius: 999px; gap: 8px; font-variant-numeric: tabular-nums; font-weight: 600; }
.balance .add { background: var(--accent); color: var(--accent-text); border-radius: 999px; padding: 3px 10px; font-size: 12px; }
.balance.low { border-color: #d29b1d; }
.wide-dialog { width: min(560px, calc(100% - 32px)); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; }
.dialog-head h2 { margin: 0; }
.balance-big { display: flex; flex-direction: column; margin: 12px 0 14px; }
.balance-big strong { font-size: 32px; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.packs { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; margin: 6px 0 10px; }
.pack { flex-direction: column; padding: 16px 10px; gap: 2px; border-radius: var(--radius); }
.pack strong { font-size: 22px; }
.pack:hover { background: var(--accent-2); }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; box-shadow: 0 8px 24px rgb(0 0 0 / .25); z-index: 50; max-width: calc(100% - 32px); }

dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); width: min(420px, calc(100% - 32px)); padding: 22px; }
dialog::backdrop { background: rgb(0 0 0 / .45); }

@media (max-width: 900px) {
  .new-layout { grid-template-columns: 1fr; gap: 16px; }
  #project-view { grid-template-columns: 1fr; overflow: auto; }
  .chat-col { border-right: none; border-bottom: 1px solid var(--line); max-height: 70vh; }
  .result-col { overflow: visible; }
  .viewer { height: 50vh; }
  .inline-form { grid-template-columns: 1fr 1fr; }
  .brand-name { display: none; }
  .auth-brand .brand-name { display: block; }
}
@media (max-width: 520px) {
  .inline-form, .two-col { grid-template-columns: 1fr; }
  .topbar select { max-width: 150px; }
  #account-name { display: none; }
}