/* DMS Persada Motor design tokens and components.
   Type: Bahnschrift (DIN-like, automotive plates) for display and figures, Segoe UI for reading, Consolas for chassis numbers.
   Layout: dark navy sidebar (navigation, simulated clock, persona) and a light work surface. */
:root {
  --font-display: "Bahnschrift", "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --font-mono: "Consolas", "Cascadia Mono", ui-monospace, monospace;

  --color-bg: #eef1f6;
  --color-surface: #ffffff;
  --color-surface-2: #f6f8fb;
  --color-border: #d9dfe8;
  --color-border-strong: #b9c3d2;
  --color-text: #101828;
  --color-muted: #667085;
  --color-row-hover: #f3f6fb;
  --color-btn-hover: #eef2f8;

  --color-primary: #1e40c9;
  --color-primary-hover: #17339f;
  --color-primary-soft: #e7ecfb;
  --color-on-primary: #ffffff;

  --color-sidebar: #0c1a3c;
  --color-sidebar-2: #112a66;
  --color-sidebar-text: #c7d2ea;
  --color-sidebar-muted: #8493bb;
  --color-sidebar-line: rgba(255, 255, 255, 0.08);
  --color-sidebar-hover: rgba(255, 255, 255, 0.06);
  --color-sidebar-active: rgba(255, 255, 255, 0.12);

  --color-success: #0e7a52; --color-success-bg: #dcf5ea;
  --color-warning: #b35c0b; --color-warning-bg: #fdefd8;
  --color-danger: #b42318; --color-danger-bg: #fde6e3;
  --color-info: #1b5fa8; --color-info-bg: #e2eefb;
  --color-neutral: #475467; --color-neutral-bg: #e9edf3;
  --color-backdrop: rgba(12, 26, 60, 0.55);

  --role-director: #0c1a3c; --role-purchasing_admin: #0f766e; --role-sales_admin: #1e40c9;
  --role-salesman: #c2410c; --role-document_admin: #6d28d9; --role-finance: #0e7a52;

  --radius-sm: 6px; --radius: 8px; --radius-lg: 14px;
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 24px; --space-6: 32px; --space-7: 48px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 1px 3px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(12, 26, 60, 0.28);
  --sidebar-w: 256px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { background: var(--color-bg); }
body {
  font-family: var(--font-body); font-size: 14px; line-height: 1.5; color: var(--color-text); background: var(--color-bg);
  display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: 100vh;
}
a { color: var(--color-primary); }
h1, h2, h3 { margin: 0; line-height: 1.2; font-family: var(--font-display); font-weight: 600; letter-spacing: 0.005em; }
h1 { font-size: 28px; } h2 { font-size: 18px; } h3 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-muted); font-weight: 600; }
p { margin: 0 0 var(--space-3); }
strong { font-weight: 600; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

main.container { padding: var(--space-6) var(--space-7) var(--space-7); max-width: 1440px; width: 100%; min-width: 0; }
.muted { color: var(--color-muted); }
.right { text-align: right; }
.mono { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.02em; }
.num, td.right, .money-summary strong, .kpi .value { font-variant-numeric: tabular-nums; }
.stack > * + * { margin-top: var(--space-4); }
.row { display: flex; gap: var(--space-2); align-items: center; flex-wrap: wrap; }

/* ---------- Sidebar shell ---------- */
#shell { position: sticky; top: 0; height: 100vh; overflow-y: auto; background: linear-gradient(180deg, var(--color-sidebar) 0%, var(--color-sidebar-2) 100%); color: var(--color-sidebar-text); display: flex; flex-direction: column; }
.sidebar { display: flex; flex-direction: column; min-height: 100%; padding: var(--space-5) var(--space-4) var(--space-4); gap: var(--space-5); }
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: #fff; }
.brand-mark { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--color-primary); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: 15px; letter-spacing: 0.04em; box-shadow: 0 6px 16px rgba(30, 64, 201, 0.45); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-family: var(--font-display); font-size: 16px; letter-spacing: 0.06em; text-transform: uppercase; }
.brand-text small { color: var(--color-sidebar-muted); font-size: 11.5px; }
.shell-nav { display: flex; flex-direction: column; gap: 2px; }
.shell-nav a { display: flex; align-items: center; gap: var(--space-3); padding: 9px 10px; border-radius: var(--radius); color: var(--color-sidebar-text); text-decoration: none; font-size: 14px; border-left: 3px solid transparent; }
.shell-nav a svg { width: 18px; height: 18px; flex: none; opacity: 0.85; }
.shell-nav a:hover { background: var(--color-sidebar-hover); color: #fff; }
.shell-nav a.active { background: var(--color-sidebar-active); color: #fff; border-left-color: #6d8dff; font-weight: 600; }
.shell-nav a.active svg { opacity: 1; }
.sidebar-note { color: var(--color-sidebar-muted); font-size: 13px; margin: 0; }
.clock { border: 1px solid var(--color-sidebar-line); border-radius: var(--radius-lg); padding: var(--space-3) var(--space-4); background: rgba(0, 0, 0, 0.18); }
.clock-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-sidebar-muted); }
.sim-date { font-family: var(--font-display); font-size: 22px; color: #fff; margin: 2px 0 var(--space-2); display: flex; align-items: baseline; gap: var(--space-2); flex-wrap: wrap; }
.sim-date .muted { color: #8fb4ff; font-size: 13px; font-family: var(--font-body); }
.clock-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.clock-actions .btn { padding: 4px 9px; font-size: 12px; background: rgba(255, 255, 255, 0.06); border-color: var(--color-sidebar-line); color: var(--color-sidebar-text); }
.clock-actions .btn:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }
.clock-actions .btn:disabled { opacity: 0.35; }
.persona { margin-top: auto; border-top: 1px solid var(--color-sidebar-line); padding-top: var(--space-4); display: grid; grid-template-columns: auto 1fr; gap: var(--space-2) var(--space-3); align-items: center; }
.persona-name { color: #fff; font-weight: 600; font-size: 14px; line-height: 1.2; }
.persona-role { color: var(--color-sidebar-muted); font-size: 12px; }
.persona-switch { grid-column: 1 / -1; }
.persona-switch select { width: 100%; font: inherit; font-size: 13px; padding: 7px 10px; border-radius: var(--radius); border: 1px solid var(--color-sidebar-line); background: rgba(255, 255, 255, 0.06); color: #fff; }
.persona-switch select option { color: var(--color-text); }
.sidebar-foot { display: flex; justify-content: flex-start; }
.sidebar-foot .btn { color: #f1a7a0; }
.sidebar-foot .btn:hover { background: rgba(180, 35, 24, 0.25); color: #fff; }
.sidebar .banner { margin: 0; font-size: 12.5px; }
.avatar { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--color-primary); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: 13px; letter-spacing: 0.04em; }
.avatar-lg { width: 48px; height: 48px; font-size: 16px; }
.avatar.role-director { background: #34406b; } .avatar.role-purchasing_admin { background: var(--role-purchasing_admin); }
.avatar.role-sales_admin { background: var(--role-sales_admin); } .avatar.role-salesman { background: var(--role-salesman); }
.avatar.role-document_admin { background: var(--role-document_admin); } .avatar.role-finance { background: var(--role-finance); }

/* ---------- Page header ---------- */
.page-header { display: flex; justify-content: space-between; align-items: flex-end; gap: var(--space-4); margin-bottom: var(--space-5); flex-wrap: wrap; }
.page-header h1 { margin-bottom: 2px; }
.page-header p { margin: 0; max-width: 64ch; }
.page-header .actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Cards and KPI ---------- */
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); box-shadow: var(--shadow); }
.card + .card { margin-top: var(--space-4); }
.card-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-4); gap: var(--space-3); flex-wrap: wrap; }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-5); }
.kpi { position: relative; display: block; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-4) var(--space-4) var(--space-4) 20px; color: inherit; text-decoration: none; box-shadow: var(--shadow); overflow: hidden; }
.kpi::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--color-primary); }
.kpi.warn::before { background: var(--color-warning); } .kpi.danger::before { background: var(--color-danger); }
a.kpi:hover { border-color: var(--color-border-strong); transform: translateY(-1px); }
.kpi .label { color: var(--color-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--font-display); }
.kpi .value { font-family: var(--font-display); font-size: 27px; font-weight: 700; line-height: 1.1; margin-top: var(--space-1); letter-spacing: -0.01em; white-space: nowrap; }
.kpi .sub { color: var(--color-muted); font-size: 12.5px; margin-top: var(--space-1); }
.kpi .kpi-actions { margin-top: var(--space-2); }
.kpi.warn .value { color: var(--color-warning); } .kpi.danger .value { color: var(--color-danger); }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: var(--space-4); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th, table.data td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: middle; white-space: nowrap; }
table.data td.wrap, table.data th.wrap { white-space: normal; min-width: 180px; }
table.data th { position: sticky; top: 0; background: var(--color-surface-2); color: var(--color-muted); font-family: var(--font-display); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.08em; }
table.data tbody tr:last-child td { border-bottom: none; }
table.data tr.clickable { cursor: pointer; }
table.data tr.clickable:hover { background: var(--color-row-hover); }
table.data tr.row-late td { background: var(--color-danger-bg); }
table.data tr.row-total td { font-weight: 700; background: var(--color-surface-2); font-family: var(--font-display); }
table.data td .btn { margin-right: var(--space-1); }
table.data td .muted { font-size: 12px; }

/* ---------- Badges ---------- */
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 2px 9px 2px 7px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; font-family: var(--font-display); letter-spacing: 0.02em; }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: 0.85; }
.badge-neutral { background: var(--color-neutral-bg); color: var(--color-neutral); }
.badge-info { background: var(--color-info-bg); color: var(--color-info); }
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-1); padding: 8px 14px; border: 1px solid var(--color-border-strong); border-radius: var(--radius); background: var(--color-surface); color: var(--color-text); font: inherit; font-weight: 600; font-size: 13.5px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--color-btn-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-on-primary); box-shadow: 0 4px 12px rgba(30, 64, 201, 0.28); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); color: var(--color-on-primary); }
.btn-danger:hover { background: #9a1c12; }
.btn-ghost { border-color: transparent; background: transparent; box-shadow: none; }
.btn-ghost.danger { color: var(--color-danger); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4) var(--space-5); }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field-full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--color-neutral); }
.field .req { color: var(--color-danger); }
.field input, .field select, .field textarea { font: inherit; padding: 9px 11px; border: 1px solid var(--color-border-strong); border-radius: var(--radius); background: var(--color-surface); color: var(--color-text); width: 100%; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); outline: none; }
.field input:read-only { background: var(--color-surface-2); }
.field select:disabled, .field input:disabled { background: var(--color-surface-2); color: var(--color-muted); }
.field .help { color: var(--color-muted); font-size: 12px; }
.static-value { padding: 9px 11px; background: var(--color-surface-2); border: 1px dashed var(--color-border-strong); border-radius: var(--radius); min-height: 38px; }
.static-value:has(.money-summary), .static-value:has(.line-items), .static-value:has(.banner) { padding: 0; border: none; background: transparent; }
.static-value .banner { margin-bottom: var(--space-3); }
.form-error { color: var(--color-danger); background: var(--color-danger-bg); padding: var(--space-2) var(--space-3); border-radius: var(--radius); margin: 0 var(--space-5); font-weight: 600; }
.filters { display: flex; gap: var(--space-2); align-items: center; flex-wrap: wrap; margin-bottom: var(--space-4); }
.filters select, .filters input { font: inherit; font-size: 13.5px; padding: 7px 10px; border: 1px solid var(--color-border-strong); border-radius: var(--radius); background: var(--color-surface); min-width: 160px; }
.filters label { display: inline-flex; align-items: center; gap: 6px; }
.filters input[type="checkbox"] { min-width: 0; width: 16px; height: 16px; margin: 0; accent-color: var(--color-primary); }
.line-items { border: 1px solid var(--color-border); border-radius: var(--radius); padding: var(--space-3); background: var(--color-surface-2); }
.line-items table.data { font-size: 13px; }
.line-items table.data th, .line-items table.data td { padding: 6px 8px; background: transparent; }
.line-items input, .line-items select { font: inherit; padding: 6px 8px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); width: 100%; background: var(--color-surface); }
.line-items .btn { margin-top: var(--space-2); }

/* ---------- Dialog ---------- */
dialog.dialog { border: none; border-radius: var(--radius-lg); padding: 0; width: min(760px, 94vw); box-shadow: var(--shadow-lg); color: var(--color-text); }
dialog.dialog-sm { width: min(460px, 94vw); }
dialog.dialog-lg { width: min(1000px, 96vw); }
dialog::backdrop { background: var(--color-backdrop); backdrop-filter: blur(2px); }
dialog.dialog[open] { animation: dialog-in 160ms ease-out; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(8px) scale(0.985); } to { opacity: 1; transform: none; } }
.dialog-form { display: flex; flex-direction: column; max-height: 90vh; }
.dialog-header { display: flex; justify-content: space-between; align-items: center; padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border); gap: var(--space-3); }
.dialog-header h2 { font-size: 19px; }
.dialog-body { padding: var(--space-5); overflow-y: auto; }
.dialog-footer { display: flex; justify-content: flex-end; gap: var(--space-2); padding: var(--space-3) var(--space-5); border-top: 1px solid var(--color-border); background: var(--color-surface-2); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: var(--space-1); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-4); overflow-x: auto; overflow-y: hidden; }
.tabs button { font: inherit; font-weight: 600; font-size: 13.5px; background: none; border: none; border-bottom: 2px solid transparent; padding: 10px 14px; color: var(--color-muted); cursor: pointer; white-space: nowrap; }
.tabs button:hover { color: var(--color-text); }
.tabs button.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ---------- Misc ---------- */
.toasts { position: fixed; right: var(--space-5); bottom: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); z-index: 1000; }
.toast { padding: var(--space-3) var(--space-4); border-radius: var(--radius); color: var(--color-on-primary); background: var(--color-success); box-shadow: var(--shadow-lg); max-width: 380px; font-weight: 600; animation: toast-in 180ms ease-out; }
.toast-error { background: var(--color-danger); }
.toast-info { background: var(--color-info); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.banner { padding: var(--space-3) var(--space-4); border-radius: var(--radius); margin-bottom: var(--space-4); font-weight: 600; border: 1px solid transparent; }
.banner-warning { background: var(--color-warning-bg); color: var(--color-warning); border-color: #f4d4a5; }
.banner-danger { background: var(--color-danger-bg); color: var(--color-danger); border-color: #f3b8b1; }
.banner-info { background: var(--color-info-bg); color: var(--color-info); border-color: #bcd4f2; }
.empty { padding: var(--space-7) var(--space-4); text-align: center; color: var(--color-muted); background: var(--color-surface); border: 1px dashed var(--color-border-strong); border-radius: var(--radius-lg); }
.empty p { max-width: 48ch; margin: 0 auto var(--space-3); }
.detail-grid { display: grid; grid-template-columns: max-content 1fr; gap: var(--space-2) var(--space-5); margin: 0; align-items: baseline; }
.detail-grid dt { color: var(--color-muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-display); }
.detail-grid dd { margin: 0; }
.money-summary { display: grid; grid-template-columns: 1fr auto; gap: 6px var(--space-5); padding: var(--space-4); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius); }
.money-summary strong { font-family: var(--font-display); font-size: 15px; }
.money-summary .total { font-weight: 700; border-top: 1px solid var(--color-border-strong); padding-top: 6px; margin-top: 2px; }
.money-summary strong.total { font-size: 17px; color: var(--color-primary); }
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 110px 1fr; gap: var(--space-3); padding: 7px 0; border-bottom: 1px solid var(--color-border); }
.timeline li > span:first-child { color: var(--color-muted); font-variant-numeric: tabular-nums; }
.timeline li:last-child { border-bottom: none; }
.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.step-list li { display: flex; justify-content: space-between; gap: var(--space-3); align-items: center; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface-2); }

/* Unit lifecycle rail: the six statuses a unit passes through, in order. */
.rail { list-style: none; margin: 0; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0; }
.rail li { position: relative; text-align: center; padding-top: 18px; font-size: 11.5px; color: var(--color-muted); }
.rail li::before { content: ""; position: absolute; top: 6px; left: 0; right: 0; height: 2px; background: var(--color-border); }
.rail li:first-child::before { left: 50%; } .rail li:last-child::before { right: 50%; }
.rail .rail-dot { position: absolute; top: 1px; left: 50%; transform: translateX(-50%); width: 12px; height: 12px; border-radius: 50%; background: var(--color-surface); border: 2px solid var(--color-border-strong); z-index: 1; }
.rail li.done::before, .rail li.current::before { background: var(--color-primary); }
.rail li.done .rail-dot { background: var(--color-primary); border-color: var(--color-primary); }
.rail li.current .rail-dot { border-color: var(--color-primary); box-shadow: 0 0 0 4px var(--color-primary-soft); }
.rail li.current { color: var(--color-primary); font-weight: 700; }
.rail li.done { color: var(--color-text); }

/* Landing (persona picker) */
.landing { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: var(--space-7); align-items: start; }
.landing-hero { padding-top: var(--space-4); }
.eyebrow { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.14em; font-size: 12px; color: var(--color-primary); font-weight: 700; margin-bottom: var(--space-3); }
.landing-hero h1 { font-size: 40px; line-height: 1.08; margin-bottom: var(--space-4); max-width: 14ch; }
.landing-hero .lead { font-size: 15.5px; color: var(--color-neutral); max-width: 52ch; }
.landing-points { list-style: none; padding: 0; margin: var(--space-5) 0 0; display: grid; gap: var(--space-3); }
.landing-points li { padding-left: var(--space-4); border-left: 3px solid var(--color-primary); color: var(--color-neutral); }
.landing-points strong { color: var(--color-text); }
.landing-personas h2 { margin-bottom: 2px; }
.persona-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: var(--space-3); margin-top: var(--space-4); }
.persona-card { text-align: left; display: grid; grid-template-columns: auto 1fr; gap: 4px var(--space-3); align-items: center; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); cursor: pointer; font: inherit; color: inherit; box-shadow: var(--shadow); }
.persona-card:hover { border-color: var(--color-primary); transform: translateY(-1px); }
.persona-card .avatar { grid-row: 1 / span 2; }
.persona-card .name { font-weight: 700; font-size: 15px; font-family: var(--font-display); }
.persona-card .role { color: var(--color-primary); font-weight: 600; font-size: 12.5px; }
.persona-card .desc { grid-column: 1 / -1; color: var(--color-muted); font-size: 12.5px; line-height: 1.4; margin-top: 6px; }

@media (prefers-reduced-motion: reduce) {
  dialog.dialog[open], .toast { animation: none; }
  a.kpi:hover, .persona-card:hover { transform: none; }
}
@media (max-width: 1100px) {
  main.container { padding: var(--space-5) var(--space-5) var(--space-6); }
  .landing { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  body { grid-template-columns: 1fr; }
  #shell { position: static; height: auto; }
  .sidebar { display: grid; grid-template-columns: 1fr 1fr; align-items: start; padding: var(--space-4); gap: var(--space-4); }
  .brand, .shell-nav, .sidebar-foot, .sidebar-note, .sidebar .banner { grid-column: 1 / -1; }
  .shell-nav { flex-direction: row; overflow-x: auto; gap: 4px; padding-bottom: 2px; }
  .shell-nav a { border-left: none; border-bottom: 3px solid transparent; border-radius: var(--radius) var(--radius) 0 0; padding: 8px 10px; white-space: nowrap; }
  .shell-nav a.active { border-bottom-color: #6d8dff; }
  .persona { margin-top: 0; border-top: none; padding-top: 0; align-self: stretch; }
  .form-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  main.container { padding: var(--space-4); }
  .landing-hero h1 { font-size: 32px; }
}