/* ==========================================================================
   VERA by SBS — layout.css
   Application shell, navigation, page scaffolding and the structural
   containers of complex views (Gantt, board, calendar, split panes).
   ========================================================================== */

/* ----- Application shell ------------------------------------------------------ */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns var(--dur) var(--ease);
}
.app-shell[data-sidebar="collapsed"] { grid-template-columns: var(--sidebar-w-collapsed) minmax(0, 1fr); }

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

/* ----- Sidebar ------------------------------------------------------------------ */
.sidebar {
  position: sticky;
  top: 0;
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--header-h);
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sidebar__org { padding: var(--space-3) var(--space-3) var(--space-2); }

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) var(--space-3) var(--space-4);
}

.sidebar__footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.app-shell[data-sidebar="collapsed"] .brand-product__by,
.app-shell[data-sidebar="collapsed"] .brand-logo--full,
.app-shell[data-sidebar="collapsed"] .brand-product,
.app-shell[data-sidebar="collapsed"] .nav__label,
.app-shell[data-sidebar="collapsed"] .nav__group-title,
.app-shell[data-sidebar="collapsed"] .nav__badge,
.app-shell[data-sidebar="collapsed"] .org-switcher__text,
.app-shell[data-sidebar="collapsed"] .sidebar__user-text { display: none; }
.app-shell[data-sidebar="collapsed"] .sidebar__brand { justify-content: center; padding: 0 var(--space-2); }
.app-shell[data-sidebar="collapsed"] .brand-logo--mark { display: block; }
.app-shell[data-sidebar="collapsed"] .nav__item { justify-content: center; }
.app-shell[data-sidebar="collapsed"] .sidebar__footer { flex-direction: column; }

.sidebar-backdrop { display: none; }

/* ----- Navigation ------------------------------------------------------------------ */
.nav__group + .nav__group { margin-top: var(--space-4); }
.nav__group-title {
  padding: 0 var(--space-3) var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.nav__list { display: flex; flex-direction: column; gap: 2px; }

/* ----- Top bar ---------------------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--header-h);
  padding: 0 var(--space-6);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.topbar__search { flex: 1; max-width: 480px; }
.topbar__spacer { flex: 1; }
.topbar__actions { display: flex; align-items: center; gap: var(--space-2); }
.topbar .topbar__menu, .topbar .topbar__search-btn { display: none; }
.topbar .topbar__brand { display: none; }

/* ----- Content & pages -------------------------------------------------------------- */
.content {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-6);
}
.content:focus { outline: none; }
.content--wide { max-width: none; }

.page { display: flex; flex-direction: column; gap: var(--space-5); }

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.page-header__titles { min-width: 0; display: flex; flex-direction: column; gap: var(--space-1); }
.page-header__actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.page-header__actions .select { width: auto; max-width: 260px; }
.page-title { font-size: var(--text-xl); }
.page-subtitle { color: var(--color-text-secondary); font-size: var(--text-base); }

.page-section { display: flex; flex-direction: column; gap: var(--space-3); }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.section-title { font-size: var(--text-md); }

.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.toolbar__spacer { flex: 1; }

/* ----- Grids ---------------------------------------------------------------------- */
.grid { display: grid; gap: var(--space-4); }
.grid--stats { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.grid--cards { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--main-side { grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr); align-items: start; }
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.stack--sm { gap: var(--space-2); }
.stack--lg { gap: var(--space-5); }
.cluster { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); }
.split { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }

/* ----- Project workspace --------------------------------------------------------------- */
.project-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: calc(var(--space-6) * -1) calc(var(--space-6) * -1) 0;
  padding: var(--space-5) var(--space-6) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.project-header__top { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.project-header__meta { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; color: var(--color-text-secondary); font-size: var(--text-sm); }
.project-body { padding-top: var(--space-5); }

.overview-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr); gap: var(--space-4); align-items: start; }

/* ----- Detail drawer content layout ------------------------------------------------------ */
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-5); }
.detail-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3) var(--space-4); }
.detail-fields--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ----- Gantt container -------------------------------------------------------------------- */
.gantt-wrap { display: flex; flex-direction: column; gap: var(--space-3); }
.gantt {
  --gantt-table-w: 340px;
  --gantt-row-h: 36px;
  --gantt-header-h: 52px;
  position: relative;
  height: calc(100vh - 300px);
  min-height: 420px;
  overflow: auto;
  overscroll-behavior: contain;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}
.gantt__canvas { position: relative; }
.gantt__header {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  height: var(--gantt-header-h);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-strong);
}
.gantt__header-table {
  position: sticky;
  left: 0;
  z-index: 5;
  flex: 0 0 var(--gantt-table-w);
  display: grid;
  align-items: end;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-strong);
}
.gantt__header-scale { position: relative; flex: 1 0 auto; }
.gantt__body { position: relative; }
.gantt__row { position: absolute; left: 0; display: flex; height: var(--gantt-row-h); }
.gantt__cell-table {
  position: sticky;
  left: 0;
  z-index: 3;
  flex: 0 0 var(--gantt-table-w);
  display: grid;
  align-items: center;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border);
}
.gantt__cell-track { position: relative; flex: 1 0 auto; border-bottom: 1px solid var(--gray-100); }
.gantt__grid-layer, .gantt__link-layer { position: absolute; top: 0; pointer-events: none; }
.gantt__link-layer { z-index: 1; overflow: visible; }

/* ----- Board ------------------------------------------------------------------------------- */
.board {
  position: relative; /* contains absolutely positioned (e.g. visually hidden) descendants within the scroll area */
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  overflow-x: auto;
  padding-bottom: var(--space-3);
  scroll-snap-type: x proximity;
}
.board__column {
  flex: 0 0 296px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 290px);
  min-height: 240px;
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  scroll-snap-align: start;
}
.board__column-header { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-3) var(--space-2); }
.board__cards { position: relative; flex: 1; display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-1) var(--space-2) var(--space-3); overflow-y: auto; min-height: 60px; }

/* ----- Calendar ----------------------------------------------------------------------------- */
.calendar { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.calendar__weekdays, .calendar__grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); }
.calendar__weekdays { border-bottom: 1px solid var(--color-border); background: var(--color-surface-muted); }
.calendar__grid--week .calendar__day { min-height: 360px; }
.calendar__day-list { display: flex; flex-direction: column; }

/* ----- Auth / standalone screens ---------------------------------------------------------- */
.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  min-height: 100vh;
}
.auth-layout__form { display: flex; align-items: center; justify-content: center; padding: var(--space-8) var(--space-6); background: var(--color-surface); }
.auth-layout__panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-12);
  background: linear-gradient(150deg, #0a2f5c 0%, var(--brand-navy) 55%, #0b4c80 100%);
  color: #e6eef8;
}
.auth-card { width: 100%; max-width: 400px; display: flex; flex-direction: column; gap: var(--space-6); }

.center-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-6);
}
.center-screen__card { width: 100%; max-width: 520px; display: flex; flex-direction: column; gap: var(--space-5); align-items: stretch; }

/* ----- Mobile tab bar (hidden on desktop) --------------------------------------------------- */
.mobile-tabbar { display: none; }

/* Login brand panel typography */
.auth-panel-title { color: #fff; font-size: 2rem; font-weight: var(--weight-bold); letter-spacing: -0.02em; }
.auth-panel-by { font-size: var(--text-lg); font-weight: var(--weight-medium); color: #9fc3ea; }
.auth-panel-lead { max-width: 460px; font-size: var(--text-md); line-height: 1.6; color: #d3e2f3; }
.auth-points { display: flex; flex-direction: column; gap: var(--space-3); max-width: 460px; }
.auth-points li { position: relative; padding-left: var(--space-6); color: #e6eef8; }
.auth-points li::before { content: ""; position: absolute; left: 0; top: 0.45em; width: 10px; height: 10px; border-radius: 3px; background: var(--brand-teal); }
.auth-panel-foot { font-size: var(--text-sm); color: #9fb7d3; }