/*
 * Page layouts: marketing pages, the onboarding/auth split screen,
 * and the signed-in app shell (sidebar + main).
 */

/* ======================= Marketing ======================= */

.site { min-height: 100vh; display: flex; flex-direction: column; background: var(--paper); }
.site > main { flex: 1; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px var(--gutter);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
  flex-wrap: nowrap;
  white-space: nowrap;
}
@media (max-width: 560px) {
  .site-nav { flex-wrap: wrap; gap: 10px 16px; }
}
.site-nav__link { color: var(--ink); font-size: 15px; }
.site-nav__link:hover { color: var(--clay); text-decoration: none; }
.site-nav__link[aria-current="page"] { color: var(--clay); font-weight: 600; }
.site-nav .btn { padding: 11px 20px; }

.site-footer {
  padding: 28px var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}
.site-footer--ruled { border-top: 1px solid var(--line); }
.site-footer__links { display: flex; gap: 20px; flex-wrap: wrap; }

.container { max-width: 1320px; margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.container--narrow { max-width: 1000px; }
.container--text { max-width: 760px; }

.site-flash { padding: 0 var(--gutter); max-width: 1320px; margin: 0 auto 8px; }

/* ======================= Split screen (onboarding + sign in) ======================= */

.split {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.split__aside {
  background: var(--ink);
  color: var(--paper);
  padding: 40px clamp(24px, 4vw, 56px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 40px;
}
.split__quote {
  font-family: var(--font-serif);
  font-size: 24px;
  line-height: 1.3;
  color: var(--text-on-dark-muted);
  margin: 0;
}
.split__main {
  padding: 56px clamp(24px, 5vw, 80px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  max-width: 760px;
  width: 100%;
}
.split__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 48px;
  line-height: 1;
  margin: 0;
}
.split__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* Onboarding step list in the dark aside. */
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.steps__item { display: flex; align-items: center; gap: 14px; font-size: 16px; color: var(--text-faint); }
.steps__dot {
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid currentColor;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.steps__item.is-current { color: var(--paper); }
.steps__item.is-done { color: var(--paper); }
.steps__item.is-done .steps__dot { background: var(--peach); border-color: var(--paper); color: var(--ink); }

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .split__aside { gap: 24px; padding-top: 28px; padding-bottom: 28px; }
  .split__quote { display: none; }
  .split__main { padding-top: 36px; padding-bottom: 48px; }
  .split__title { font-size: 40px; }
}

/* ======================= App shell ======================= */

.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 232px;
  flex-shrink: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 24px 14px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width .2s ease;
}
.sidebar__top { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 4px 0 10px; }
.sidebar .brand { gap: 10px; }
.sidebar .brand-mark { --mark-size: 34px; --mark-ring-width: 3; }
.sidebar .brand__name { font-size: 21px; }
.sidebar .brand__ar { font-size: 12px; color: var(--text-on-dark-muted); }

.icon-button {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--ink-line);
  background: none;
  color: var(--text-on-dark-muted);
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
}
.icon-button:hover { background: var(--ink-raised); color: var(--paper); }

.sidebar__nav { display: flex; flex-direction: column; gap: 14px; }
.nav-group { display: flex; flex-direction: column; gap: 1px; }
.nav-group__label {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-on-dark-faint);
  font-weight: 700;
  padding: 0 12px 4px;
}
.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 14px;
  color: var(--text-on-dark-muted);
  text-decoration: none;
}
.nav-link:hover { background: var(--ink-raised); color: var(--paper); text-decoration: none; }
.nav-link[aria-current="page"] { background: var(--ink-raised); color: var(--paper); }
.nav-link__label { display: flex; align-items: center; gap: 10px; min-width: 0; }
.nav-link .icon { flex-shrink: 0; opacity: 0.9; }

.sidebar__bottom { margin-top: auto; display: flex; flex-direction: column; gap: 12px; padding: 0 10px; }

.upgrade-card {
  background: var(--ink-raised);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin: 0 -4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--paper);
  text-decoration: none;
}
.upgrade-card:hover { border-color: var(--peach); text-decoration: none; color: var(--paper); }
.upgrade-card strong { font-size: 14px; color: var(--peach); }
.upgrade-card span { font-size: 12px; color: var(--text-on-dark-muted); }

.streak { display: flex; align-items: center; gap: 10px; }
.streak__count { font-family: var(--font-serif); font-size: 34px; color: var(--peach); line-height: 1; }
.streak__label { font-size: 13px; line-height: 1.3; color: var(--text-on-dark-muted); }

.account-button {
  background: transparent;
  border: none;
  border-radius: 12px;
  padding: 6px 8px;
  margin: 0 -8px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--paper);
  text-align: left;
  width: calc(100% + 16px);
}
.account-button:hover, .account-button[aria-expanded="true"] { background: var(--ink-raised); }
.account-button__name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-button__caret { color: var(--text-on-dark-faint); font-size: 12px; }

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--green);
  color: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.avatar--lg { width: 42px; height: 42px; font-size: 17px; }

/* Collapsed sidebar (desktop). Elements marked .when-expanded / .when-collapsed swap. */
.sidebar .when-collapsed { display: none; }
.app.is-collapsed .sidebar { width: 64px; padding: 22px 8px; align-items: center; }
.app.is-collapsed .sidebar .when-expanded { display: none; }
.app.is-collapsed .sidebar .when-collapsed { display: flex; }
.sidebar__mini { flex-direction: column; align-items: center; gap: 20px; flex: 1; }
.sidebar__mini-logo { display: flex; text-decoration: none; }
.sidebar__mini-logo .brand-mark { --mark-size: 38px; --mark-ring-width: 3; }
.sidebar__mini-rule { width: 28px; height: 1px; background: var(--ink-line); }
.sidebar__mini-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  font-weight: 600;
}
.sidebar__mini-bottom { margin-top: auto; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.sidebar__mini-bottom .streak__count { font-size: 28px; }
.sidebar__mini-avatar { width: 36px; height: 36px; border: 2px solid var(--green); padding: 0; font-size: 14px; }
.sidebar__mini-avatar[aria-expanded="true"] { border-color: var(--peach); }

/* Account menu popover. */
.menu-backdrop { position: fixed; inset: 0; z-index: 40; }
.account-menu {
  position: fixed;
  left: 240px;
  bottom: 20px;
  z-index: 41;
  width: 310px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-menu);
  display: flex;
  flex-direction: column;
}
.app.is-collapsed .account-menu { left: 72px; }
.account-menu__head { padding: 16px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--line-soft); }
.account-menu__who { display: flex; flex-direction: column; min-width: 0; }
.account-menu__who strong { font-size: 15px; }
.account-menu__who span { font-size: 13px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-menu__tags { padding: 12px 16px; display: flex; gap: 8px; flex-wrap: wrap; border-bottom: 1px solid var(--line-soft); }
.account-menu__list { padding: 6px; display: flex; flex-direction: column; }
.account-menu__list + .account-menu__list { border-top: 1px solid var(--line-soft); }
.account-menu__item {
  background: none;
  border: none;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--ink);
  text-align: left;
  text-decoration: none;
  width: 100%;
}
.account-menu__item:hover { background: var(--sand-hover); text-decoration: none; color: var(--ink); }
.account-menu__list .account-menu__item { padding-block: 8px; }
.account-menu__label { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.account-menu__item .icon { flex-shrink: 0; opacity: 0.75; }
.account-menu__item--danger .icon { opacity: 1; }
.account-menu__item small { font-size: 12px; color: var(--text-muted); white-space: nowrap; flex-shrink: 0; }
.account-menu__item--danger { color: var(--clay); font-weight: 600; }
.account-menu__item--danger:hover { background: var(--clay-soft); color: var(--clay); }

.app-main { flex: 1; min-width: 0; padding: 32px clamp(20px, 3.5vw, 48px) 64px; }
.app-flash { margin-bottom: 20px; max-width: 1180px; }
.app-flash--toast {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  width: min(560px, calc(100vw - 32px));
  margin: 0;
  box-shadow: var(--shadow-menu);
  border-radius: var(--radius-md);
}
.app-flash--toast a { color: inherit; font-weight: 600; }

/* Mobile top bar (hidden on desktop). */
.topbar { display: none; }

@media (max-width: 860px) {
  .app { flex-direction: column; }
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--ink);
    color: var(--paper);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 30;
  }
  .topbar .brand { gap: 10px; }
  .topbar .brand-mark { --mark-size: 34px; --mark-ring-width: 3; }
  .topbar .brand__name { font-size: 21px; }
  .topbar .brand__ar { font-size: 12px; color: var(--text-on-dark-muted); }
  .topbar__actions { display: flex; align-items: center; gap: 10px; }

  .sidebar,
  .app.is-collapsed .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    width: min(280px, 85vw);
    padding: 24px 14px;
    align-items: stretch;
    transform: translateX(-100%);
    transition: transform .2s ease;
  }
  .app.is-collapsed .sidebar .when-expanded { display: flex; }
  .app.is-collapsed .sidebar .when-collapsed { display: none; }
  .app.is-nav-open .sidebar { transform: none; box-shadow: var(--shadow-menu); }
  .sidebar__collapse { display: none; }
  .nav-scrim { position: fixed; inset: 0; background: rgba(28, 35, 33, .45); z-index: 45; }
  .account-menu, .app.is-collapsed .account-menu { left: 16px; bottom: 16px; }
  .app-main { padding: 24px 16px 48px; }
}
@media (min-width: 861px) {
  .nav-scrim { display: none; }
}

/* A screen inside the app shell. */
.screen { display: flex; flex-direction: column; gap: 24px; max-width: 1180px; }
.screen--narrow { max-width: 860px; margin: 0 auto; }
.screen--text { max-width: 760px; margin: 0 auto; }
.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}
.screen-header__kicker { font-size: 14px; color: var(--text-muted); margin-bottom: 10px; }
.screen-header__sub { font-size: 16px; color: var(--text-body); line-height: 1.5; margin-top: 8px; max-width: 620px; }

.split__aside .brand-mark { --mark-size: 40px; }
.split__aside .brand__name { font-size: 26px; }
.split__aside .brand__ar { font-size: 14px; }

/* "Please confirm your email" bar for unconfirmed students. */
.confirm-email__form { display: inline; }
.confirm-email__resend { color: inherit; font-weight: 600; text-decoration: underline; white-space: nowrap; }