/* Application shell — global (unscoped) layout breakpoints */

.app-shell {
  height: 100dvh;
  display: flex;
  width: 100%;
  background: var(--color-shell-bg);
  overflow: hidden;
}

.app-layout {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 100%;
  min-height: 0;
}

.app-frame {
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  flex: 1;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.app-main__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  width: 100%;
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding);
  position: relative;
}

.page-transition {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow: hidden;
}

@media (min-width: 768px) {
  .app-content {
    padding-inline: var(--page-padding-tablet);
  }
}

@media (min-width: 1200px) {
  .app-content {
    padding-inline: var(--page-padding-desktop);
  }
}

/* ── Mobile: full-width native app (< 768px) ── */
.app-shell--with-nav {
  justify-content: stretch;
}

.app-shell--with-nav .app-frame {
  max-width: 100%;
  margin: 0;
  border-radius: 0;
  box-shadow: none;
}

/* ── Tablet + Desktop: sidebar + header shell (>= 768px) ── */
@media (min-width: 768px) {
  .app-shell--with-nav {
    background: var(--color-page-background);
  }

  .app-shell--with-nav .app-frame {
    background: var(--color-page-background);
  }

  .app-shell--with-nav .app-layout {
    position: relative;
  }

  /* One continuous divider under sidebar brand + top header */
  .app-shell--with-nav .app-layout::after {
    content: '';
    position: absolute;
    top: var(--header-height);
    inset-inline: 0;
    height: 1px;
    background: var(--color-border);
    z-index: 30;
    pointer-events: none;
  }

  /*
   * Scroll lives on app-main__content. Children must not shrink+clip
   * (flex + overflow:hidden), or short viewports hide the bottom of pages.
   */
  .app-shell--with-nav .app-main__content {
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .app-shell--with-nav .app-content,
  .app-shell--with-nav .page-transition {
    flex: 1 0 auto;
    min-height: min-content;
    overflow: visible;
  }

  /* Let route roots grow with content so the shell scroll area can work */
  .app-shell--with-nav .page-transition > * {
    flex: 1 0 auto;
    min-height: min-content;
    height: auto;
    max-height: none;
    overflow: visible;
  }
}

/* ── Guest pages (login, register, checkout) — all breakpoints ── */
.app-shell--no-nav {
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--color-page-background);
}

.app-shell--no-nav .app-layout {
  max-width: var(--form-max-width);
  width: 100%;
  height: auto;
  max-height: calc(100dvh - 32px);
  min-height: 0;
  overflow: hidden;
}

.app-shell--no-nav .app-frame {
  max-width: var(--form-max-width);
  width: 100%;
  height: auto;
  max-height: calc(100dvh - 32px);
  min-height: 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-frame);
  background: var(--color-surface);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.app-shell--no-nav .app-main,
.app-shell--no-nav .app-main__content,
.app-shell--no-nav .app-content,
.app-shell--no-nav .page-transition {
  flex: 1 0 auto;
  min-height: min-content;
  overflow: visible;
  height: auto;
}

.app-shell--no-nav .app-content {
  padding-inline: var(--page-padding);
}

.app-shell--no-nav .page {
  background: transparent;
  overflow: visible;
  min-height: auto;
}

.app-shell--no-nav.app-shell--wide .app-layout,
.app-shell--no-nav.app-shell--wide .app-frame {
  max-width: min(var(--content-max-width), calc(100vw - 32px));
}

.app-shell--no-nav.app-shell--wide .app-frame {
  background: var(--color-bg);
}

@media (min-width: 768px) {
  .app-shell--no-nav {
    padding: 24px;
  }

  .app-shell--no-nav .app-layout,
  .app-shell--no-nav .app-frame {
    max-height: calc(100dvh - 48px);
  }

  .app-shell--no-nav.app-shell--wide .app-layout,
  .app-shell--no-nav.app-shell--wide .app-frame {
    max-width: min(var(--content-max-width), calc(100vw - 48px));
  }
}