:root {
  color-scheme: light;
  --canvas: oklch(97.2% 0.008 72);
  --paper: oklch(99% 0.005 72);
  --sidebar: oklch(94.5% 0.012 67);
  --ink: oklch(23% 0.02 52);
  --muted: oklch(49% 0.018 58);
  --faint: oklch(65% 0.014 62);
  --line: oklch(87.5% 0.014 67);
  --line-strong: oklch(78% 0.022 60);
  --accent: oklch(55% 0.16 38);
  --accent-hover: oklch(49% 0.16 36);
  --accent-soft: oklch(93% 0.035 42);
  --success: oklch(49% 0.105 158);
  --success-soft: oklch(94% 0.035 158);
  --warning: oklch(57% 0.11 78);
  --warning-soft: oklch(94% 0.04 82);
  --danger: oklch(51% 0.16 25);
  --danger-soft: oklch(94% 0.035 25);
  --shadow: 0 18px 55px oklch(24% 0.025 50 / 0.09);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
html { min-width: 360px; background: var(--canvas); }
body { margin: 0; color: var(--ink); background: var(--canvas); font: 14px/1.55 var(--font); }
button, input, textarea, select { font: inherit; color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; }
code, pre { font-family: var(--mono); }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 11px; font-weight: 760; letter-spacing: .14em; }

:focus-visible { outline: 3px solid oklch(69% 0.13 40 / .32); outline-offset: 2px; }

.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 17px; font-weight: 750; letter-spacing: -.02em; }
.brand-large { font-size: 20px; }
.brand-mark { position: relative; display: inline-grid; place-items: center; width: 27px; height: 27px; transform: rotate(45deg); }
.brand-mark i { position: absolute; width: 5px; height: 18px; border-radius: 5px; background: var(--accent); }
.brand-mark i:nth-child(2) { transform: rotate(45deg); }
.brand-mark i:nth-child(3) { transform: rotate(90deg); }
.brand-mark i:nth-child(4) { transform: rotate(135deg); }

.login-view { min-height: 100vh; display: grid; grid-template-columns: minmax(420px, 1.05fr) minmax(430px, .95fr); }
.login-story { min-height: 100vh; display: flex; flex-direction: column; justify-content: space-between; padding: 54px clamp(48px, 7vw, 112px); background: var(--sidebar); border-right: 1px solid var(--line); }
.login-message { max-width: 650px; padding: 80px 0; }
.login-message h1 { margin: 0; max-width: 620px; font-size: clamp(44px, 5vw, 76px); line-height: .99; letter-spacing: -.065em; }
.login-message > p:last-child { max-width: 55ch; margin: 28px 0 0; color: var(--muted); font-size: 17px; }
.model-facts { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 24px 0 0; border-top: 1px solid var(--line-strong); }
.model-facts div { min-width: 0; padding-right: 24px; }
.model-facts dt { color: var(--muted); font-size: 11px; font-weight: 650; }
.model-facts dd { margin: 5px 0 0; font-size: 13px; font-weight: 720; overflow-wrap: anywhere; }
.login-panel { min-height: 100vh; display: grid; place-items: center; align-content: center; gap: 40px; padding: 48px; background: var(--paper); }
.login-form { width: min(390px, 100%); }
.login-form h2 { margin: 0; font-size: 28px; letter-spacing: -.04em; }
.form-intro { margin: 9px 0 30px; color: var(--muted); }
.login-form .field { margin-top: 18px; }
.login-form .primary { margin-top: 24px; }
.portal-link { display: block; margin-top: 20px; color: var(--muted); text-align: center; text-underline-offset: 4px; }
.portal-link:hover { color: var(--accent); }
.login-footnote { max-width: 390px; margin: 0; color: var(--faint); font-size: 11px; text-align: center; }

.field { display: grid; gap: 7px; min-width: 0; }
.field > span { font-size: 12px; font-weight: 680; }
.field small { color: var(--faint); font-weight: 500; }
.field input, .field textarea, .field select, .compact-select { width: 100%; min-height: 42px; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--paper); transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.field textarea { resize: vertical; }
.field input:hover, .field textarea:hover, .field select:hover, .compact-select:hover { border-color: var(--muted); }
.field input:focus, .field textarea:focus, .field select:focus, .compact-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px oklch(69% 0.13 40 / .16); }
.field input:disabled { color: var(--muted); background: var(--canvas); }
.range-field input { min-height: auto; padding: 0; accent-color: var(--accent); }
.range-field > span { display: flex; justify-content: space-between; }

.button { min-height: 40px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 9px 15px; border: 1px solid transparent; border-radius: 9px; font-weight: 690; text-decoration: none; transition: transform 160ms cubic-bezier(.25, 1, .5, 1), background 160ms ease, border-color 160ms ease, opacity 160ms ease; }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: .52; transform: none; }
.button.primary { color: oklch(98% .004 65); background: var(--accent); border-color: var(--accent); }
.button.primary:hover { background: var(--accent-hover); }
.button.secondary { background: var(--paper); border-color: var(--line-strong); }
.button.secondary:hover { border-color: var(--muted); }
.wide { width: 100%; }
.text-button { padding: 6px 0; border: 0; color: var(--accent); background: none; font-weight: 700; }
.text-button:hover { color: var(--accent-hover); }
.form-error { min-height: 20px; margin: 8px 0 0; color: var(--danger); font-size: 12px; }

.app { min-height: 100vh; display: grid; grid-template-columns: 232px minmax(0, 1fr); }
.sidebar { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; padding: 26px 18px 18px; background: var(--sidebar); border-right: 1px solid var(--line); }
.sidebar > .brand { padding: 0 10px 22px; }
.nav { display: grid; gap: 4px; margin-top: 18px; }
.nav button, .nav-logout { width: 100%; display: flex; align-items: center; gap: 12px; padding: 10px 12px; border: 0; border-radius: 8px; color: var(--muted); background: transparent; text-align: left; font-weight: 630; transition: background 160ms ease, color 160ms ease; }
.nav button span { width: 18px; color: var(--faint); font-family: var(--mono); text-align: center; }
.nav button:hover, .nav button.active { color: var(--ink); background: var(--paper); }
.nav button.active span { color: var(--accent); }
.sidebar-foot { display: grid; gap: 12px; margin-top: auto; }
.model-lock { display: flex; align-items: center; gap: 10px; padding: 12px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.model-lock div { min-width: 0; display: grid; }
.model-lock small { color: var(--muted); font-size: 10px; }
.model-lock strong { overflow: hidden; font-family: var(--mono); font-size: 10px; text-overflow: ellipsis; }
.status-dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px var(--success-soft); }

.workspace { min-width: 0; }
.topbar { position: sticky; top: 0; z-index: 10; min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px clamp(22px, 4vw, 54px); border-bottom: 1px solid var(--line); background: oklch(97.2% .008 72 / .94); }
.topbar h2 { margin: 0; font-size: 16px; letter-spacing: -.02em; }
.top-context { margin: 0; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.account-brief { display: flex; align-items: center; gap: 10px; }
.account-brief > div { display: grid; }
.account-brief > div:first-child { padding-right: 18px; margin-right: 8px; border-right: 1px solid var(--line); text-align: right; }
.account-brief small { color: var(--muted); font-size: 10px; }
.account-brief strong { font-size: 12px; }
.avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: var(--accent); background: var(--accent-soft); font-weight: 800; }
.mobile-menu { display: none; border: 0; background: none; font-size: 20px; }
.content { max-width: 1540px; margin: 0 auto; padding: 42px clamp(22px, 4vw, 54px) 80px; }
.page { animation: reveal 220ms cubic-bezier(.25, 1, .5, 1); }
@keyframes reveal { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }
.page-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 34px; }
.page-heading h1 { margin: 0; font-size: 29px; line-height: 1.15; letter-spacing: -.045em; }
.page-heading p:last-child { max-width: 70ch; margin: 8px 0 0; color: var(--muted); }

.balance-strip { display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 40px; padding: 19px 0; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.balance-strip > div { min-width: 150px; display: grid; gap: 4px; padding: 0 28px; border-right: 1px solid var(--line); }
.balance-strip > div:first-child { padding-left: 0; }
.balance-strip > div:last-child { border-right: 0; }
.balance-strip span { color: var(--muted); font-size: 11px; }
.balance-strip strong { font-size: 18px; font-variant-numeric: tabular-nums; }

.section-block { margin-top: 32px; padding: 24px; border: 1px solid var(--line); border-radius: 13px; background: var(--paper); }
.section-block.flush { padding: 0; overflow: hidden; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.section-heading h2 { margin: 0; font-size: 18px; letter-spacing: -.025em; }
.section-heading p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.table-wrap { width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; white-space: nowrap; font-size: 12px; }
th { padding: 11px 13px; color: var(--muted); font-size: 10px; font-weight: 720; letter-spacing: .05em; text-align: left; text-transform: uppercase; }
td { padding: 13px; border-top: 1px solid var(--line); vertical-align: middle; }
tbody tr { transition: background 140ms ease; }
tbody tr:hover { background: var(--canvas); }
td code { color: var(--accent); font-size: 11px; }
.empty-row td { height: 130px; color: var(--muted); text-align: center; }
.table-action { padding: 4px 7px; border: 0; color: var(--accent); background: none; font-weight: 700; }
.status { display: inline-flex; align-items: center; gap: 6px; padding: 4px 8px; border-radius: 999px; background: var(--canvas); font-size: 10px; font-weight: 720; }
.status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--faint); }
.status.success { color: var(--success); background: var(--success-soft); }
.status.success::before { background: var(--success); }
.status.failed { color: var(--danger); background: var(--danger-soft); }
.status.failed::before { background: var(--danger); }
.status.running { color: var(--warning); background: var(--warning-soft); }
.status.running::before { background: var(--warning); }

.chat-layout { min-height: calc(100vh - 200px); display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 26px; }
.chat-settings { align-self: start; display: grid; gap: 20px; padding: 24px; border: 1px solid var(--line); border-radius: 13px; background: var(--paper); }
.chat-settings h1 { margin: 0; font-size: 23px; letter-spacing: -.04em; }
.chat-settings > div:first-child > p:last-child { margin: 7px 0 0; color: var(--muted); font-size: 12px; }
.estimate-note { display: grid; gap: 3px; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.estimate-note span, .estimate-note small { color: var(--muted); font-size: 10px; }
.estimate-note strong { font-size: 17px; }
.conversation { min-width: 0; min-height: 660px; display: grid; grid-template-rows: auto minmax(360px, 1fr) auto; border: 1px solid var(--line); border-radius: 13px; background: var(--paper); overflow: hidden; }
.conversation-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 20px; border-bottom: 1px solid var(--line); }
.conversation-head > div { display: flex; align-items: center; gap: 9px; }
.conversation-head strong { font-family: var(--mono); font-size: 11px; }
.conversation-head small, .conversation-head > span { color: var(--muted); font-size: 10px; }
.messages { min-height: 0; overflow-y: auto; padding: 24px; }
.empty-state { min-height: 100%; display: grid; place-content: center; justify-items: center; text-align: center; color: var(--muted); }
.empty-state > span { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 14px; border-radius: 50%; color: var(--accent); background: var(--accent-soft); font-size: 20px; }
.empty-state h2 { margin: 0; color: var(--ink); font-size: 18px; }
.empty-state p { max-width: 45ch; margin: 6px 0 0; }
.message { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 12px; max-width: 820px; margin: 0 auto 24px; }
.message-avatar { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 9px; color: var(--muted); background: var(--canvas); font-size: 11px; font-weight: 760; }
.message.assistant .message-avatar { color: var(--accent); background: var(--accent-soft); }
.message-content { min-width: 0; }
.message-content > strong { display: block; margin: 4px 0 7px; font-size: 11px; }
.message-content p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.message-meta { display: flex; flex-wrap: wrap; gap: 10px 16px; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; }
.message.error .message-content { color: var(--danger); }
.composer { padding: 16px 18px; border-top: 1px solid var(--line); background: var(--canvas); }
.composer textarea { width: 100%; min-height: 82px; padding: 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--paper); resize: vertical; }
.composer textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px oklch(69% 0.13 40 / .14); }
.composer > div { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 9px; }
.composer > div > span { color: var(--muted); font-size: 10px; }

.inline-create { display: grid; grid-template-columns: minmax(220px, 430px) auto; align-items: end; gap: 12px; max-width: 620px; margin-bottom: 26px; }
.one-time-key { display: grid; grid-template-columns: 1fr minmax(240px, 1.4fr) auto; align-items: center; gap: 22px; margin: 22px 0; padding: 20px; border: 1px solid var(--accent); border-radius: 12px; background: var(--accent-soft); }
.one-time-key h2 { margin: 0; font-size: 17px; }
.one-time-key p:last-child { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.one-time-key code { padding: 10px 12px; border-radius: 8px; background: var(--paper); overflow-wrap: anywhere; font-size: 11px; user-select: all; }
.compact-select { width: auto; min-width: 150px; }
.detail-panel, .manage-customer { margin-top: 24px; padding: 24px; border: 1px solid var(--line-strong); border-radius: 13px; background: var(--paper); box-shadow: var(--shadow); }
.detail-head { display: flex; align-items: start; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.detail-head h2 { margin: 0; font-size: 20px; }
.detail-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.detail-grid > div { min-width: 0; padding: 14px; background: var(--paper); }
.detail-grid small { display: block; color: var(--muted); font-size: 10px; }
.detail-grid strong { display: block; margin-top: 4px; overflow-wrap: anywhere; }
.detail-code { margin-top: 20px; }
.detail-code h3 { font-size: 13px; }
.detail-code pre, pre { max-width: 100%; padding: 17px; border: 1px solid var(--line); border-radius: 10px; background: oklch(94.5% .012 67); overflow: auto; color: var(--ink); font-size: 11px; white-space: pre-wrap; overflow-wrap: anywhere; }

.customer-create { display: grid; grid-template-columns: 1.3fr repeat(4, minmax(140px, 1fr)) auto; align-items: end; gap: 14px; padding: 22px 0; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.customer-create h2 { margin: 0; font-size: 18px; }
.customer-create > div > p { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.customer-create .form-error { grid-column: 2 / -1; margin: -7px 0 0; }
.manage-grid { display: grid; grid-template-columns: repeat(3, minmax(170px, 1fr)) auto; align-items: end; gap: 14px; }
.manage-actions { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); }

.docs-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 38px; }
.docs-main { max-width: 900px; }
.docs-main h2 { margin: 32px 0 12px; font-size: 18px; }
.docs-main h2:first-child { margin-top: 0; }
.docs-main > p { max-width: 72ch; color: var(--muted); }
.definition-list { margin: 0; border-top: 1px solid var(--line); }
.definition-list div { display: grid; grid-template-columns: 130px 1fr; padding: 13px 0; border-bottom: 1px solid var(--line); }
.definition-list dt { color: var(--muted); }
.definition-list dd { margin: 0; overflow-wrap: anywhere; }
.code-tabs { display: flex; gap: 4px; margin-top: 28px; border-bottom: 1px solid var(--line); }
.code-tabs button { padding: 9px 12px; border: 0; border-bottom: 2px solid transparent; color: var(--muted); background: none; }
.code-tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }
.pricing-sheet { align-self: start; position: sticky; top: 110px; padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.pricing-sheet h2 { margin: 0; font-size: 19px; }
.pricing-sheet > p:nth-of-type(2) { color: var(--muted); font-size: 12px; }
.pricing-sheet dl { margin: 22px 0; }
.pricing-sheet dl div { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.pricing-sheet dt { color: var(--muted); }
.pricing-sheet dd { margin: 0; font-weight: 750; }
.pricing-sheet > small { color: var(--faint); }

.toast-region { position: fixed; top: 18px; right: 18px; z-index: 100; display: grid; gap: 8px; }
.toast { max-width: 360px; padding: 11px 14px; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--paper); box-shadow: var(--shadow); animation: toast-in 200ms cubic-bezier(.25, 1, .5, 1); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

@media (max-width: 1180px) {
  .customer-create { grid-template-columns: repeat(2, minmax(180px, 1fr)); }
  .customer-create > div { grid-column: 1 / -1; }
  .customer-create .form-error { grid-column: 1 / -1; }
  .detail-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .login-view { grid-template-columns: 1fr; }
  .login-story { min-height: auto; padding: 32px; }
  .login-message { padding: 70px 0 55px; }
  .login-message h1 { font-size: 50px; }
  .login-panel { min-height: auto; padding: 70px 32px; }
  .app { display: block; }
  .sidebar { position: fixed; z-index: 30; width: 250px; transform: translateX(-105%); transition: transform 220ms cubic-bezier(.25, 1, .5, 1); box-shadow: var(--shadow); }
  .app.nav-open .sidebar { transform: none; }
  .mobile-menu { display: block; }
  .topbar { justify-content: flex-start; }
  .account-brief { margin-left: auto; }
  .chat-layout { grid-template-columns: 1fr; }
  .chat-settings { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chat-settings > div:first-child, .chat-settings .estimate-note, .chat-settings .wide { grid-column: 1 / -1; }
  .docs-layout { grid-template-columns: 1fr; }
  .pricing-sheet { position: static; }
}

@media (max-width: 720px) {
  .login-story { padding: 26px 22px; }
  .login-message { padding: 55px 0 44px; }
  .login-message h1 { font-size: 43px; }
  .model-facts { grid-template-columns: 1fr; gap: 14px; }
  .login-panel { padding: 56px 22px; }
  .topbar { min-height: 68px; padding: 10px 18px; }
  .topbar > div:nth-child(2) { display: none; }
  .account-brief > div:first-child { display: none; }
  .content { padding: 30px 18px 64px; }
  .page-heading { align-items: stretch; flex-direction: column; margin-bottom: 26px; }
  .page-heading .button { align-self: start; }
  .balance-strip { display: grid; grid-template-columns: 1fr 1fr; }
  .balance-strip > div, .balance-strip > div:first-child { min-width: 0; padding: 12px; border-right: 0; border-bottom: 1px solid var(--line); }
  .balance-strip > div:nth-child(odd) { border-right: 1px solid var(--line); }
  .section-block { padding: 17px; }
  .chat-settings { grid-template-columns: 1fr; }
  .chat-settings > * { grid-column: auto !important; }
  .conversation { min-height: 620px; }
  .messages { padding: 18px 14px; }
  .composer { padding: 13px; }
  .inline-create { grid-template-columns: 1fr; }
  .one-time-key { grid-template-columns: 1fr; }
  .detail-grid, .manage-grid { grid-template-columns: 1fr; }
  .customer-create { grid-template-columns: 1fr; }
  .customer-create > * { grid-column: auto !important; }
  .definition-list div { grid-template-columns: 1fr; gap: 4px; }
  [data-admin-cell] { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}