/* 2026-05-04 - PHARMAI - 화면 셸 레이아웃 (헤더 + 좌패널 + 메인 그리드)
 * 파일 위치: ai-agent/claude/260504_신규UI_프로토타입/src/styles/layout.css
 * 기준: 디자인가이드 §8.1 FHD 1920x1080, §8.3 spacing
 */

/* === Reset === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-base);
  color: var(--text-body);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  color: inherit;
}

/* === Body grid: header (56) + (panel | main) === */
body {
  display: grid;
  grid-template-columns: var(--panel-w-expanded) 1fr;
  grid-template-rows: var(--header-h) 1fr;
  grid-template-areas:
    "header header"
    "panel  main";
  height: 100vh;
  overflow: hidden;
  transition: grid-template-columns var(--dur-slow) var(--ease-out);
}

body[data-panel="collapsed"] {
  grid-template-columns: var(--panel-w-collapsed) 1fr;
}

/* === Header === */
.app-header {
  grid-area: header;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--sp-10);
  background: var(--bg-panel);
  border-bottom: var(--bw-1) solid var(--border-divider);
  gap: var(--sp-8);
}

.app-header__left,
.app-header__center,
.app-header__right {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.app-header__center {
  flex: 1;
  justify-content: center;
}

/* === Panel === */
.app-panel {
  grid-area: panel;
  z-index: var(--z-panel);
  background: var(--bg-panel);
  border-right: var(--bw-1) solid var(--border-divider);
  padding: var(--sp-7) var(--sp-6);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

/* === Main === */
.app-main {
  grid-area: main;
  background: var(--bg-base);
  padding: var(--content-pad-y) var(--content-pad-x);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--card-gap);
}

/* === Toast / Modal roots === */
.toast-root {
  position: fixed;
  bottom: var(--sp-8);
  right: var(--sp-8);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  pointer-events: none;
}

.modal-root {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal-backdrop);
  pointer-events: none;
}

.modal-root:empty {
  display: none;
}