/* ==========================================================================
   Lexion — Layout
   App shell: sidebar (desktop) / drawer + bottom nav (mobile).
   ========================================================================== */

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

/* ---------------------------------------------------------------- Sidebar */
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-4);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  border-right: var(--border-hairline);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-1) var(--space-3);
}

.brand__mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--color-primary), var(--color-secondary));
  color: #14161c;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  letter-spacing: 0.01em;
}

.brand__tag {
  font-size: var(--fs-xs);
  color: var(--color-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.nav__label {
  padding: var(--space-3) var(--space-3) var(--space-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-muted);
}

.nav__item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
  border: 1px solid transparent;
  transition: background var(--dur-2) var(--ease-out),
              color var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out);
  cursor: pointer;
}

.nav__item .icon { flex: 0 0 auto; }

.nav__item:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.nav__item[aria-current="page"] {
  background: var(--color-primary-soft);
  color: var(--color-text);
  border-color: color-mix(in srgb, var(--color-primary) 28%, transparent);
}

.nav__item[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 22%;
  height: 56%;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.nav__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-muted);
}

.sidebar__foot {
  margin-top: auto;
  padding: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-muted);
  border-top: var(--border-hairline);
}

/* ------------------------------------------------------------- Main area */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ---------------------------------------------------------------- Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-4);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: var(--border-hairline);
}

.topbar__title {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1 1 auto;
}

.topbar__eyebrow {
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-muted);
}

.topbar__heading {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
}

/* Layar sempit: aksi topbar jadi ikon-saja agar judul halaman tetap terbaca. */
@media (max-width: 560px) {
  .topbar__actions [data-action="new-note"] { width: 44px; padding: 0; border-radius: var(--radius-md); }
  .topbar__actions [data-action="new-note"] span { display: none; }
}

.icon-btn {
  display: none;               /* hanya muncul di mobile */
  width: 42px;
  height: 42px;
  place-items: center;
  border: var(--border-hairline);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--dur-2) var(--ease-out);
}
.icon-btn:hover { background: var(--color-surface-2); }

/* --------------------------------------------------------------- Content */
.content {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) calc(var(--space-16) + var(--bottomnav-h) + env(safe-area-inset-bottom, 0px));
  animation: view-in var(--dur-3) var(--ease-out) both;
}

@keyframes view-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ------------------------------------------------------- Mobile nav bits */
.bottomnav { display: none; }

.overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: rgba(6, 7, 10, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-2) var(--ease-out), visibility var(--dur-2);
}

body.drawer-open .overlay { opacity: 1; visibility: visible; }

/* -------------------------------------------------------------- ≤ 1024px */
@media (max-width: 1024px) {
  .app { grid-template-columns: minmax(0, 1fr); }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    /* Harus DI ATAS overlay (--z-drawer) agar tap pada item menu mengenai
       link navigasi, bukan scrim. Sebelumnya keduanya bernilai sama sehingga
       overlay (yang datang setelah #app di DOM) menutupi sidebar. */
    z-index: calc(var(--z-drawer) + 1);
    width: min(84vw, 320px);
    transform: translateX(-102%);
    transition: transform var(--dur-3) var(--ease-out);
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
  }

  body.drawer-open .sidebar { transform: none; }

  .icon-btn { display: grid; }

  .bottomnav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 40;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    height: calc(var(--bottomnav-h) + env(safe-area-inset-bottom, 0px));
    padding: var(--space-1) var(--space-2) env(safe-area-inset-bottom, 0);
    background: color-mix(in srgb, var(--color-surface) 94%, transparent);
    backdrop-filter: blur(12px);
    border-top: var(--border-hairline);
  }

  .bottomnav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 0.625rem;
    letter-spacing: 0.02em;
    color: var(--color-muted);
    border-radius: var(--radius-md);
    cursor: pointer;
  }

  .bottomnav__item[aria-current="page"] { color: var(--color-primary); }
}

/* -------------------------------------------------------------- ≥ 1025px */
@media (min-width: 1025px) {
  .overlay { display: none; }
}