Design

Layout System

Grid system, sidebar, responsive breakpoints, and layout patterns.

Dashboard App Shell

css

.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  height: 100vh;
  overflow: hidden;
}

Sidebar (240px, collapsible on tablet)

css

.side {
  background: var(--side);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
}

Main Content

css

.main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}
.top {
  height: 56px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 22px;
  flex: none;
}
.content {
  flex: 1;
  overflow: auto;
  padding: 22px;
}

Responsive Breakpoints

Breakpoint	Behavior
`> 1024px`	Full sidebar + main layout
`≤ 1024px`	Sidebar becomes off-canvas drawer, main goes full-width
`≤ 768px`	Phone layout: hide breadcrumbs, time range, env toggle; KPIs 2-col
`≤ 480px`	KPIs 1-col, buttons full-width

Drawer (Tablet)

css

@media(max-width:1024px) {
  .app { grid-template-columns: 1fr; height: 100dvh; }
  .side {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 264px; z-index: 300;
    transform: translateX(-100%);
    transition: transform .22s cubic-bezier(.2,.8,.2,1);
    box-shadow: var(--sh-md);
  }
  .app.nav-open .side { transform: none; }
  .menu-btn { display: grid; }
}

Landing Page Layout

Container

css

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

Section Spacing

css

section {
  padding: clamp(64px, 8vw, 96px) 0;
}

Section Header

css

.sec-head {
  max-width: 680px;
  margin-bottom: 48px;
}
.sec-head.c {  /* centered */
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

Common Grid Patterns

Pattern	Grid Template
KPIs (4-col)	`repeat(4, 1fr)`
KPIs (2-col mobile)	`repeat(2, 1fr)`
Product cards (3-col)	`repeat(3, 1fr)`
Split (list + detail)	`300px 1fr`
Detail grid (span tree + inspect)	`1.5fr 1fr`
Cost split	`1fr 1fr`
Governance split	`1.3fr 1fr`
Settings grid	`1fr 1fr`
Prompt editor	`300px 1fr`

Content Flow

Top bar — fixed 56px, title + search + env toggle
Content — scrollable, padded 22px
Page header — title + description + action buttons
KPI row — 4 cards, always first
Filter bar — chips + rate counter
Table — full-width, sticky head row
Detail panels — grid 1.5fr/1fr, sticky inspector