.app-shell {
  display: flex;
  flex-direction: column;
  /* Привязка к краям visual viewport — без полосы над шапкой при rotate/fullscreen */
  position: fixed;
  inset: 0;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  z-index: 1;
  background: var(--bg);
  overflow: hidden;
}

.app-shell[hidden],
.login-page[hidden],
.service-page[hidden] {
  display: none !important;
}

.topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 0 0 auto;
  position: relative;
  height: calc(var(--topbar-h) + var(--space-2) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: var(--space-2);
  padding-left: 0;
  padding-right: max(var(--shell-gutter), env(safe-area-inset-right, 0px));
  border: 0;
  background: var(--bg-elevated);
  color: var(--text);
  z-index: 30;
  transition: transform 0.28s ease, margin-top 0.28s ease;
  will-change: transform;
}

/* Полоса над service-rail — тот же фон и ширина */
.topbar::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail-w);
  background: var(--bg-deep);
  pointer-events: none;
  z-index: 0;
}

.topbar > * {
  position: relative;
  z-index: 1;
}

/* Скрыть шапку: уезжает вверх, место под контент освобождается */
.app-shell.is-chrome-hidden .topbar {
  transform: translateY(-100%);
  margin-top: calc(-1 * (var(--topbar-h) + var(--space-2) + env(safe-area-inset-top, 0px)));
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .topbar {
    transition: none;
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text);
  text-decoration: none;
  min-height: var(--touch);
  flex-shrink: 0;
}

.brand:hover {
  color: var(--text);
  text-decoration: none;
}

.brand__logo {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
  padding: 0.25rem;
  box-sizing: content-box;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  filter: none;
  box-shadow: inset 0 0 0 1px var(--border);
}

.brand__mark {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: normal;
  text-transform: none;
}

.brand__tag {
  display: none;
}

/* Topbar: логотип = колонка rail; название = вровень с module-nav__label */
.topbar .brand {
  align-self: stretch;
  min-height: 0;
  gap: 0;
  margin-top: calc(-1 * env(safe-area-inset-top, 0px));
  margin-bottom: calc(-1 * var(--space-2));
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: var(--space-2);
  /* rail-w + module-nav padding-inline-start + label margin-inline-start */
  padding-left: calc(var(--rail-w) + var(--space-2) + var(--space-2));
}

.topbar .brand__logo {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail-w);
  height: auto;
  margin: 0;
  padding: var(--space-1);
  box-sizing: border-box;
  object-fit: contain;
  border-radius: 0;
  box-shadow: none;
}

.topbar .brand__mark {
  /* совпадает с .module-nav__label */
  font-size: 12px;
  font-weight: 600;
  color: var(--text-faint);
}

.topbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
}

.topbar__nav .nav-link {
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.topbar__nav .nav-link:hover {
  color: var(--text);
  background: var(--bg-hover);
}

.topbar__nav .nav-link.is-active {
  color: var(--text);
  background: var(--bg-hover);
  box-shadow: none;
}

/* Rail + content row — full remaining viewport height */
.shell-body {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}

.service-rail {
  flex: 0 0 var(--rail-w);
  width: var(--rail-w);
  align-self: stretch;
  height: 100%;
  min-height: 0;
  border: 0;
  background: var(--bg-deep);
  padding: var(--space-1);
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
  overscroll-behavior: contain;
  z-index: 40;
}

.service-rail__list {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.service-rail__pin {
  flex: 0 0 auto;
  margin-top: auto;
  padding-top: var(--space-1);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: center;
  position: sticky;
  bottom: 0;
  background: var(--bg-deep);
  z-index: 1;
}

.service-rail__pin .service-btn {
  width: 100%;
}

.shell-content {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: row;
  overflow: hidden;
  background: var(--bg);
}

.shell-content--no-modules .module-nav {
  display: none !important;
}

.workarea {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

.module-nav {
  flex: 0 0 var(--module-w);
  width: var(--module-w);
  max-width: var(--module-w);
  align-self: stretch;
  border: 0;
  background: var(--bg-elevated);
  padding: var(--space-3) var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.module-nav[hidden] {
  display: none !important;
}

.module-nav__head {
  display: contents;
}

.module-nav__label {
  font-size: 12px;
  letter-spacing: normal;
  text-transform: none;
  color: var(--text-faint);
  margin: 0 0 var(--space-2) var(--space-2);
  font-weight: 600;
  flex-shrink: 0;
}

.module-nav__current {
  display: none;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  flex: 1;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.module-nav__toggle {
  display: none;
  flex-shrink: 0;
  margin-left: auto;
  color: var(--text);
  border-color: var(--border-subtle);
  background: transparent;
  min-width: var(--touch);
  justify-content: center;
}

/* .btn { display: inline-flex } в components.css перебивает display/hidden без !important */
.module-nav__toggle,
.module-nav__toggle[hidden],
.module-nav__current[hidden] {
  display: none !important;
}

.module-nav__items {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
}

/* Desktop: sandwich never — даже если класс остался после resize */
@media (min-width: 1101px) {
  .module-nav--sandwich .module-nav__current,
  .module-nav--sandwich .module-nav__toggle {
    display: none !important;
  }

  .module-nav--sandwich .module-nav__items {
    display: flex !important;
    position: static;
    inset: auto;
    flex: none;
    width: auto;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    max-height: none;
    overflow: visible;
  }
}

.main {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  width: 100%;
  padding: var(--space-4) var(--shell-gutter);
  padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
  display: flex;
  flex-direction: column;
  align-items: stretch;
  background: var(--bg);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.main > .view.is-active {
  width: min(100%, var(--content-max));
  margin-inline: auto;
}

.main__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

/* Активный модуль уже в module-nav — page H1 не дублируем */
.main__header h1,
.dk-mount > .dk-vstack > h1:first-of-type {
  display: none;
}

.main__header p {
  margin: 0;
  max-width: 42rem;
  font-size: 14px;
}

.view {
  display: none;
  animation: viewIn var(--ease);
}

.view.is-active {
  display: block;
}

@keyframes viewIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.login-page {
  min-height: 100dvh;
  height: 100%;
  overflow: auto;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  position: relative;
  z-index: 1;
  background: var(--bg);
}

.login-panel {
  width: min(360px, 100%);
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.login-panel .brand {
  margin-bottom: var(--space-4);
  color: var(--text);
}

.login-panel .brand__logo {
  filter: none;
  background: var(--bg-hover);
  box-shadow: inset 0 0 0 1px var(--border);
}

.login-panel .brand__mark {
  color: var(--text);
}

.service-page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-5);
  background: var(--bg);
  color: var(--text);
}

.service-page h1 {
  font-size: 3rem;
  font-weight: 400;
  margin: 0 0 var(--space-2);
}

.service-page a {
  color: var(--text);
}

.mobile-modules-btn {
  display: none;
}

/* Tablet: module nav horizontal strip with scroll */
@media (max-width: 1100px) {
  .shell-content {
    flex-direction: column;
  }

  .module-nav {
    flex: 0 0 auto;
    width: 100%;
    max-width: 100%;
    border: 0;
    flex-direction: row;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
    overflow-x: auto;
    overflow-y: hidden;
  }

  .module-nav__head {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
  }

  .module-nav__label {
    margin: 0;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .module-nav__items {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: var(--space-1);
    min-width: 0;
    flex: 1 1 auto;
  }

  .module-nav__items .module-link {
    flex-shrink: 0;
    white-space: nowrap;
    align-items: center;
  }

  .module-nav__items .module-link > span {
    white-space: nowrap;
  }

  /* Overflow → sandwich panel (только ≤1100px) */
  .module-nav--sandwich {
    position: relative;
    overflow: visible;
    z-index: 35;
  }

  .module-nav--sandwich .module-nav__head {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1 1 auto;
    min-width: 0;
    width: 100%;
    margin: 0;
  }

  .module-nav--sandwich .module-nav__label {
    margin: 0;
    white-space: nowrap;
  }

  .module-nav--sandwich .module-nav__current:not([hidden]),
  .module-nav--sandwich .module-nav__toggle:not([hidden]) {
    display: inline-flex !important;
  }

  .module-nav--sandwich .module-nav__items {
    position: absolute;
    top: calc(100% + 1px);
    left: auto;
    right: var(--space-2);
    flex: none;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    width: max-content;
    min-width: min(16rem, calc(100vw - 2 * var(--space-3)));
    max-width: calc(100% - 2 * var(--space-2));
    padding: var(--space-1);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(1, 4, 9, 0.4);
    max-height: min(70vh, 20rem);
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .module-nav--sandwich .module-nav__items .module-link {
    white-space: normal;
    align-items: flex-start;
    width: 100%;
  }

  .module-nav--sandwich .module-nav__items .module-link > span {
    white-space: normal;
    word-break: normal;
    overflow-wrap: normal;
    hyphens: none;
  }

  .module-nav--sandwich:not(.is-open) .module-nav__items {
    display: none !important;
  }

  .module-nav--sandwich.is-open .module-nav__items {
    display: flex !important;
  }
}

/* Mobile: bottom service rail */
@media (max-width: 720px) {
  :root {
    --rail-w: 0px;
    --topbar-h: 3rem;
  }

  .topbar {
    padding-top: env(safe-area-inset-top, 0px);
    padding-left: max(var(--space-3), env(safe-area-inset-left, 0px));
    padding-right: max(var(--space-3), env(safe-area-inset-right, 0px));
    gap: var(--space-2);
  }

  .topbar .brand {
    align-self: center;
    margin-top: 0;
    margin-bottom: 0;
    padding-top: 0;
    padding-bottom: 0;
    padding-left: 0;
    gap: var(--space-2);
    min-height: var(--touch);
  }

  .topbar .brand__logo {
    position: static;
    width: 2rem;
    height: 2rem;
    padding: 0.25rem;
    box-sizing: content-box;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    box-shadow: inset 0 0 0 1px var(--border);
  }

  .topbar .brand__mark {
    font-size: 14px;
    color: var(--text);
  }

  .topbar__nav .nav-link span:not([data-icon]):not(.icon) {
    display: none;
  }

  .shell-body {
    flex-direction: column;
    padding-bottom: calc(3.5rem + env(safe-area-inset-bottom, 0px));
  }

  .service-rail {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    width: auto;
    height: auto; /* не наследовать height:100% — иначе rail на весь экран */
    max-height: none;
    align-self: auto;
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    border: 0;
    padding: var(--space-1) var(--space-2) calc(var(--space-1) + env(safe-area-inset-bottom, 0px));
    background: var(--bg-deep);
    overflow: hidden;
    gap: 2px;
  }

  /* Rail с аккаунтом всегда виден — не прячем при chrome-hide */
  .app-shell.is-chrome-hidden .shell-body {
    padding-bottom: calc(3.5rem + env(safe-area-inset-bottom, 0px));
  }

  .service-rail__list {
    flex: 1 1 auto;
    flex-direction: row;
    align-items: stretch;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 0;
  }

  .service-rail__pin {
    margin-top: 0;
    margin-left: auto;
    padding-top: 0;
    padding-left: var(--space-1);
    border: 0;
    align-items: center;
    position: static;
    background: var(--bg-deep);
  }

  .service-rail__pin .service-btn {
    width: 2.5rem;
    min-width: 2.5rem;
  }

  .service-rail .service-btn {
    flex: 0 0 auto;
  }

  .shell-content {
    flex: 1;
    min-height: 0;
  }

  .main {
    padding: var(--space-3) var(--space-4);
  }

  .main__header {
    flex-direction: column;
    align-items: flex-start;
  }
}