/* ==========================================================================
   Shells: public nav/footer, app rail, auth layout, shared PromptBox,
   connect sheet, secret sheet, route loading / error states
   ========================================================================== */

/* ---------- Public shell ---------- */
.pub { min-height: 100vh; display: flex; flex-direction: column; }
.pub-nav { position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color var(--dur); }
.pub-nav.is-scrolled { border-bottom-color: var(--border); }
.pub-nav__inner { max-width: 1240px; margin: 0 auto; height: 60px; padding: 0 24px; display: flex; align-items: center; gap: 28px; }
.pub-nav__links { display: flex; align-items: center; gap: 2px; }
.pub-nav__link { display: inline-flex; align-items: center; gap: 4px; height: 32px; padding: 0 11px; border-radius: 8px; font-size: var(--fs-md); font-weight: 500; color: var(--text-2); transition: all var(--dur-fast); }
.pub-nav__link:hover, .pub-nav__link.is-active { color: var(--text); background: var(--surface-hover); }
.pub-nav__right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.pub-nav__burger { display: none; }
.pub-main { flex: 1; }
.pub-mobile-menu { display: none; }
@media (max-width: 900px) {
  .pub-nav__links, .pub-nav__right .hide-sm { display: none; }
  .pub-nav__burger { display: inline-flex; }
  .pub-mobile-menu.is-open { display: flex; flex-direction: column; gap: 2px; padding: 8px 16px 16px; border-bottom: 1px solid var(--border); background: var(--bg); }
  .pub-nav__inner { padding: 0 16px; gap: 12px; }
}

.pub-footer { border-top: 1px solid var(--border); background: var(--surface-2); margin-top: 80px; }
.pub-footer__inner { max-width: 1240px; margin: 0 auto; padding: 48px 24px 28px; display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
.pub-footer__col h4 { font-size: var(--fs-sm); font-weight: 600; margin-bottom: 12px; color: var(--text); }
.pub-footer__col a { display: block; font-size: var(--fs-md); color: var(--text-2); padding: 4px 0; }
.pub-footer__col a:hover { color: var(--text); }
.pub-footer__bottom { max-width: 1240px; margin: 0 auto; padding: 16px 24px 32px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: var(--fs-sm); color: var(--text-3); border-top: 1px solid var(--border); }
@media (max-width: 800px) { .pub-footer__inner { grid-template-columns: 1fr 1fr; } }

/* ---------- App shell (left rail) ---------- */
.app { display: flex; min-height: 100vh; }
.rail { position: sticky; top: 0; height: 100vh; width: var(--rail-w); flex-shrink: 0; display: flex; flex-direction: column; background: var(--surface-2); border-right: 1px solid var(--border); transition: width var(--dur) var(--ease); z-index: 50; }
.rail.is-collapsed { width: var(--rail-w-collapsed); }
.rail__top { padding: 14px 12px 8px; display: flex; flex-direction: column; gap: 10px; }
.rail__brand { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 0 4px; min-height: 30px; }
.rail__search { display: flex; align-items: center; gap: 8px; height: 32px; padding: 0 10px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text-3); font-size: var(--fs-sm); width: 100%; transition: border-color var(--dur-fast); }
.rail__search:hover { border-color: var(--border-strong); color: var(--text-2); }
.rail__search .kbd { margin-left: auto; }
.rail__nav { padding: 6px 10px; display: flex; flex-direction: column; gap: 1px; }
.rail__item { position: relative; display: flex; align-items: center; gap: 10px; height: 34px; padding: 0 10px; border-radius: var(--radius-sm); font-size: var(--fs-md); font-weight: 500; color: var(--text-2); transition: background var(--dur-fast), color var(--dur-fast); white-space: nowrap; overflow: hidden; }
.rail__item:hover { background: var(--surface-hover); color: var(--text); }
.rail__item.is-active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-xs); border: 1px solid var(--border); }
.rail__item.is-active .icon { color: var(--blueprint); }
.rail__item .icon { flex-shrink: 0; }
.rail__count { margin-left: auto; font-size: 10.5px; font-weight: 700; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--red); color: #fff; display: grid; place-items: center; }
.rail__section { padding: 14px 20px 6px; font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); white-space: nowrap; overflow: hidden; }
.rail__recent { padding: 0 10px; display: flex; flex-direction: column; gap: 1px; overflow: auto; }
.rail__recent a { display: flex; align-items: center; gap: 9px; height: 30px; padding: 0 10px; border-radius: var(--radius-sm); font-size: var(--fs-sm); color: var(--text-2); white-space: nowrap; overflow: hidden; }
.rail__recent a:hover { background: var(--surface-hover); color: var(--text); }
.rail__bottom { margin-top: auto; padding: 10px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 2px; }
.rail__usage { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: var(--radius-sm); font-size: var(--fs-sm); color: var(--text-2); }
.rail__usage:hover { background: var(--surface-hover); }
.rail__user { display: flex; align-items: center; gap: 9px; width: 100%; padding: 6px 8px; border-radius: var(--radius-sm); text-align: left; }
.rail__user:hover { background: var(--surface-hover); }
.rail.is-collapsed .rail__label, .rail.is-collapsed .rail__section, .rail.is-collapsed .rail__recent, .rail.is-collapsed .rail__search span, .rail.is-collapsed .rail__search .kbd, .rail.is-collapsed .logo span, .rail.is-collapsed .rail__count { display: none; }
.rail.is-collapsed .rail__item, .rail.is-collapsed .rail__usage, .rail.is-collapsed .rail__user { justify-content: center; padding: 0; }
.rail.is-collapsed .rail__search { justify-content: center; padding: 0; }
.rail.is-collapsed .rail__brand { flex-direction: column; }
.app-main { flex: 1; min-width: 0; }
.app-page { max-width: var(--content-max); margin: 0 auto; padding: 28px 32px 64px; }
.app-page--wide { max-width: 1440px; }
.app-page--narrow { max-width: 880px; }
.app-mobilebar { display: none; }
@media (max-width: 820px) {
  .rail { position: fixed; left: 0; top: 0; transform: translateX(-100%); transition: transform var(--dur) var(--ease); box-shadow: var(--shadow-lg); }
  .rail.is-mobile-open { transform: none; }
  .app-mobilebar { display: flex; align-items: center; gap: 10px; height: 52px; padding: 0 12px; border-bottom: 1px solid var(--border); background: var(--surface-2); position: sticky; top: 0; z-index: 40; }
  .app-page { padding: 20px 16px 48px; }
}

/* ---------- Auth layout ---------- */
.auth { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); }
.auth__form { display: flex; flex-direction: column; padding: 28px 40px; }
.auth__form-inner { width: 100%; max-width: 380px; margin: auto; display: flex; flex-direction: column; gap: 14px; }
.auth__title { font-size: var(--fs-3xl); font-weight: 650; letter-spacing: -0.025em; }
.auth__aside { position: relative; overflow: hidden; border-left: 1px solid var(--border); display: flex; flex-direction: column; justify-content: center; padding: 48px; }
.auth__provider { justify-content: flex-start; gap: 12px; }
.auth__provider svg { width: 18px; height: 18px; }
.auth__mode-note { font-size: var(--fs-xs); color: var(--text-3); display: flex; gap: 6px; align-items: flex-start; }
@media (max-width: 900px) { .auth { grid-template-columns: 1fr; } .auth__aside { display: none; } .auth__form { padding: 20px 16px; } }

/* ---------- PromptBox (shared composer on landing / start) ---------- */
.promptbox { position: relative; background: var(--surface); border: 1px solid var(--border-strong); border-radius: 18px; box-shadow: var(--shadow-md); transition: border-color var(--dur), box-shadow var(--dur); text-align: left; }
.promptbox:focus-within { border-color: var(--blueprint-line); box-shadow: var(--shadow-md), 0 0 0 4px var(--blueprint-soft); }
.promptbox__input { display: block; width: 100%; min-height: 96px; max-height: 280px; resize: none; border: 0; outline: none; background: transparent; padding: 18px 20px 8px; font-size: var(--fs-lg); line-height: 1.5; color: var(--text); }
.promptbox__input::placeholder { color: var(--text-4); }
.promptbox__bar { display: flex; align-items: center; gap: 6px; padding: 8px 10px 10px 12px; }
.promptbox__attachments { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 16px; }
.promptbox__attachment { display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 8px; border-radius: 8px; background: var(--bg-sunken); font-size: var(--fs-xs); color: var(--text-2); }
.promptbox__send { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: var(--blueprint); color: #fff; transition: transform var(--dur-fast), background var(--dur-fast), opacity var(--dur-fast); }
.promptbox__send:hover:not(:disabled) { background: var(--blueprint-hover); }
.promptbox__send:disabled { opacity: 0.35; cursor: not-allowed; }
.promptbox__hint { font-size: var(--fs-xs); color: var(--text-3); margin-right: 6px; }
.startfrom { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.startfrom .chip .icon { color: var(--text-3); }

/* ---------- Connect sheet (simulated OAuth consent) ---------- */
.consent { display: flex; flex-direction: column; gap: 16px; }
.consent__logos { display: flex; align-items: center; justify-content: center; gap: 14px; padding: 8px 0 4px; }
.consent__tile { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 20px; box-shadow: var(--shadow-sm); }
.consent__dots { display: flex; gap: 4px; }
.consent__dots span { width: 5px; height: 5px; border-radius: 50%; background: var(--border-strong); }
.consent__scopes { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.consent__scope { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: var(--fs-md); }
.consent__scope:last-child { border-bottom: 0; }
.int-tile { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 12.5px; flex-shrink: 0; letter-spacing: -0.02em; }
.int-tile--sm { width: 20px; height: 20px; border-radius: 6px; font-size: 10px; }
.int-tile--lg { width: 40px; height: 40px; border-radius: 11px; font-size: 16px; }

/* ---------- Route states ---------- */
.route-loading { min-height: 60vh; display: grid; place-items: center; }
.route-error { max-width: 640px; margin: 80px auto; padding: 24px; }
.route-error pre { white-space: pre-wrap; font-size: 12px; background: var(--bg-sunken); padding: 12px; border-radius: var(--radius); color: var(--red-ink); overflow: auto; max-height: 240px; }
.demo-banner { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 6px 12px; font-size: var(--fs-xs); background: var(--amber-soft); color: var(--amber-ink); border-bottom: 1px solid var(--amber-line); }

/* Review polish: provider buttons (Button wraps children in one span), sign-in context + recap, composer hint on phones */
.auth__provider > span:not(.btn__spinner) { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.auth__provider > span > .grow { flex: 1; text-align: center; }
.auth__reason { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface-2); font-size: var(--fs-sm); color: var(--text-2); line-height: 1.45; }
.auth__reason > svg { flex-shrink: 0; margin-top: 2px; color: var(--blueprint); }
.auth__reason b { color: var(--text); font-weight: 600; }
.auth__recap { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; padding: 10px 12px; margin-bottom: 14px; border-radius: var(--radius); background: var(--surface-2); border: 1px solid var(--border); font-size: var(--fs-sm); color: var(--text); }
.auth__recap-item { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; }
.auth__recap-item > svg { color: var(--blueprint); }
.auth__recap-note { flex-basis: 100%; font-size: var(--fs-xs); color: var(--text-3); }
@media (max-width: 560px) { .promptbox__hint { display: none; } }