.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  height: 100vh;
  overflow: hidden;
}
.app.is-collapsed { grid-template-columns: var(--sidebar-w-min) minmax(0, 1fr); }

/* ---------------------------------------------------------------- sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border-right: 1px solid var(--line-1);
  min-width: 0;
}
.wordmark {
  position: relative;
  display: block;
  margin: 28px 20px 36px 24px;
  padding-left: 14px;
  color: var(--fg-0);
}
.wordmark::before {
  content: "";
  position: absolute; left: 0; top: 2px; bottom: 2px;
  width: 2px; background: var(--blue-500);
}
.wordmark-top {
  display: block;
  font-family: var(--font-display); font-weight: 500;
  font-size: var(--fs-11); letter-spacing: var(--track-wide);
  color: var(--fg-2); text-transform: uppercase; line-height: 1.2;
}
.wordmark-main {
  display: block;
  font-family: var(--font-display); font-weight: 700;
  font-size: 22px; letter-spacing: var(--track-caps);
  text-transform: uppercase; line-height: 1.1; margin-top: 4px;
}
.wordmark-mini { display: none; font-family: var(--font-display); font-weight: 700; font-size: 22px; line-height: 1; }

.nav { display: flex; flex-direction: column; gap: 2px; padding: 0 12px; }
.nav-item {
  position: relative;
  display: flex; align-items: center; gap: 12px;
  height: 40px; padding: 0 12px;
  border-radius: var(--r-1);
  color: var(--fg-2);
  font-weight: 500;
  transition: color .12s, background-color .12s;
}
.nav-item:hover { color: var(--fg-0); background: var(--bg-2); }
.nav-item[aria-current="page"] { color: var(--fg-0); background: var(--bg-3); }
.nav-item[aria-current="page"]::before {
  content: ""; position: absolute; left: -12px; top: 8px; bottom: 8px; width: 2px; background: var(--blue-500);
}
.nav-item .kbd-hint { margin-left: auto; font-size: var(--fs-11); color: var(--fg-2); letter-spacing: .04em; }

.sidebar-foot {
  margin-top: auto;
  padding: 16px 24px 20px;
  border-top: 1px solid var(--line-1);
  display: flex; flex-direction: column; gap: 6px;
}
.sidebar-foot .who { color: var(--fg-1); font-weight: 600; font-size: var(--fs-13); }
.sidebar-toggle {
  display: flex; align-items: center; gap: 8px; margin-top: 6px;
  color: var(--fg-2); font-size: var(--fs-12); height: 28px;
}
.sidebar-toggle:hover { color: var(--fg-0); }

.is-collapsed .wordmark { margin: 28px 0 36px 24px; padding-left: 10px; }
.is-collapsed .wordmark-top, .is-collapsed .wordmark-main { display: none; }
.is-collapsed .wordmark-mini { display: block; }
.is-collapsed .nav-item { justify-content: center; padding: 0; }
.is-collapsed .nav-item span, .is-collapsed .nav-item .kbd-hint { display: none; }
.is-collapsed .sidebar-foot { padding: 16px 0; align-items: center; }
.is-collapsed .sidebar-foot .who, .is-collapsed .sidebar-foot .meta, .is-collapsed .sidebar-toggle span { display: none; }

/* ---------------------------------------------------------------- página */
.main { overflow: auto; min-width: 0; position: relative; }
.main.is-fixed { overflow: hidden; display: flex; flex-direction: column; }

.page { padding: 0 40px 56px; max-width: 1640px; }
.page.is-full { max-width: none; height: 100%; display: flex; flex-direction: column; padding-bottom: 0; min-height: 0; }

.page-head {
  display: flex; align-items: flex-end; gap: 20px;
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--line-1);
  margin-bottom: 28px;
}
.page-head .page-num {
  font-family: var(--font-display); font-weight: 500; font-size: var(--fs-14);
  color: var(--fg-2); letter-spacing: var(--track-caps); padding-bottom: 5px;
}
.page-head h1 {
  font-family: var(--font-display); font-weight: 600; font-size: var(--fs-32);
  text-transform: uppercase; letter-spacing: var(--track-caps); line-height: var(--lh-tight);
}
.page-head .sub { color: var(--fg-2); font-size: var(--fs-13); padding-bottom: 5px; }
.page-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }

/* título de seção com a régua */
.sec {
  position: relative;
  display: flex; align-items: baseline; gap: 10px;
  padding-left: 12px; margin-bottom: 18px;
  font-family: var(--font-display); font-weight: 500; font-size: var(--fs-20);
  text-transform: uppercase; letter-spacing: var(--track-caps); line-height: 1.1;
  color: var(--fg-0);
}
.sec::before { content: ""; position: absolute; left: 0; top: 1px; bottom: 1px; width: 2px; background: var(--blue-500); }
.sec::after { content: ""; flex: 1; height: 1px; background: var(--line-1); align-self: center; margin-left: 8px; }
.sec .sec-num { color: var(--fg-2); font-size: var(--fs-14); }
.sec { white-space: nowrap; }
.sec .sec-extra { overflow: hidden; text-overflow: ellipsis; min-width: 0; order: 3; margin-left: 12px; font-family: var(--font-text); font-size: var(--fs-12); text-transform: none; letter-spacing: 0; color: var(--fg-2); }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3-2 { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); }
.row-gap { margin-top: 44px; }

/* ---------------------------------------------------------------- drawer */
.drawer-scrim {
  position: fixed; inset: 0; background: rgba(3, 6, 11, .62); z-index: 40;
}
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: var(--drawer-w); max-width: 100vw;
  background: var(--bg-1); border-left: 1px solid var(--line-2);
  box-shadow: -24px 0 48px rgba(0, 0, 0, .4);
  z-index: 41; display: flex; flex-direction: column;
  animation: drawer-in .18s ease-out;
}
@keyframes drawer-in { from { transform: translateX(24px); opacity: 0; } to { transform: none; opacity: 1; } }

@media (max-width: 1100px) {
  .page { padding: 0 24px 48px; }
  .grid-2, .grid-3-2 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 900px) {
  .drawer { width: 100vw; }
}