/* ============================================================
   IPTunnel Admin — App shell (single consolidated layer)
   Light editorial workspace + dark navigation spine (saas pattern).
   Visibility of #adminPanel / #loginSection stays inline-display
   driven (auth.js contract). Tokens: css/tokens.css.
   ============================================================ */

/* ---------- shell grid ---------- */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
}
.app-shell.is-rail {
  grid-template-columns: var(--sidebar-w-collapsed) minmax(0, 1fr);
}

/* ---------- sidebar (dark spine, both themes) ---------- */
.app-sidebar {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
  background: var(--surface-sidebar);
  border-right: 1px solid var(--side-border);
  color: var(--text-2);
  z-index: var(--z-sticky);
  transition: width 180ms var(--ease);
  overflow: hidden;
}
.app-sidebar.is-collapsed { width: var(--sidebar-w-collapsed); }

.app-sidebar-head {
  display: flex; align-items: center; gap: 10px;
  min-height: var(--topbar-h);
  padding: 0 13px;
  border-bottom: 1px solid var(--side-border);
  flex: none;
}
/* house logo mark: lowercase i on purple gradient, asymmetric corner */
.app-brandmark {
  width: 34px; height: 34px; flex: none;
  border-radius: var(--r-mark);
  background: var(--brand-gradient);
  display: grid; place-content: center;
  font: 800 19px/1 var(--font-display);
  font-style: italic;
  color: #fff;
}
.app-brandname { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.app-brandname strong { font: 700 14px/1.1 var(--font-display); letter-spacing: -0.025em; color: var(--text); }
.app-brandname span {
  font: 500 9px/1.2 var(--font-mono);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-3); margin-top: 2px;
}
.app-nav-collapse {
  display: grid; place-content: center; flex: none;
  width: 30px; height: 30px;
  border: 0; border-radius: 8px;
  background: transparent; color: var(--text-3); cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.app-nav-collapse:hover { background: var(--surface-hover); color: var(--text); }
.app-nav-collapse .icon { width: 15px; height: 15px; transition: transform 160ms var(--ease); }
.app-sidebar.is-collapsed .app-nav-collapse .icon { transform: rotate(180deg); }

.app-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 6px 11px 12px; }
.app-nav-group + .app-nav-group { margin-top: 8px; }
.app-nav-section {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; min-height: 28px; margin: 7px 0 2px; padding: 0 7px;
  border: 0; background: transparent; cursor: pointer;
  color: #788392;
  font: 650 10px/1 var(--font-ui);
  letter-spacing: 0.09em; text-transform: uppercase;
  text-align: left;
}
.app-nav-section .icon { width: 13px; height: 13px; flex: none; transition: transform 160ms var(--ease); }
.app-nav-section[aria-expanded="false"] .icon { transform: rotate(-90deg); }
.app-nav-items.is-closed { display: none; }

.app-sidebar .menu-item {
  position: relative;
  display: flex; align-items: center; gap: 10px;
  min-height: 36px; padding: 0 9px; border-radius: 8px;
  color: var(--text-2); text-decoration: none; cursor: pointer;
  font: 400 var(--text-sm)/1 var(--font-ui);
  border: none; background: none; width: 100%;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.app-sidebar .menu-item .icon { width: 16px; height: 16px; color: var(--text-3); flex: none; transition: color var(--t-fast) var(--ease); }
.app-sidebar .menu-item.active { background: transparent; color: var(--text); font-weight: 500; }
.app-sidebar .menu-item.active::before {
  content: "";
  position: absolute; left: -11px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 24px; border-radius: 2px;
  background: var(--mint);
}
.app-sidebar .menu-item.active .icon { color: var(--mint); }
.app-sidebar .menu-item:active { transform: scale(0.99); }

.app-nav-badge {
  min-width: 20px; margin-left: auto; padding: 2px 6px;
  border-radius: 999px; background: var(--surface-hover); color: var(--text-2);
  font: 600 10px/1.2 var(--font-mono); text-align: center;
}
.app-nav-badge.is-live { background: var(--success-surface); color: var(--success); }

.app-sidebar-foot {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto auto;
  align-items: center; gap: 10px;
  min-height: 64px; padding: 10px 13px;
  border-top: 1px solid var(--side-border);
  background: var(--side-foot-bg);
  flex: none;
}
.app-sidebar-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--surface-hover); border: 1px solid var(--border-strong);
  display: grid; place-content: center;
  font: 700 11px/1 var(--font-ui); color: var(--text);
}
.app-sidebar-user { display: flex; flex-direction: column; min-width: 0; }
.app-sidebar-user strong { font: 650 12px/1.25 var(--font-ui); color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.app-sidebar-user span { font: 400 10px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); }
.app-foot-btn {
  display: grid; place-content: center;
  width: 30px; height: 30px; flex: none;
  border: 0; border-radius: 8px;
  background: transparent; color: var(--text-3); cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.app-foot-btn:hover { background: var(--surface-hover); color: var(--text); }
.app-foot-btn .icon { width: 15px; height: 15px; }

/* theme toggle icon swap */
.app-icon-sun { display: none; }
.app-icon-moon { display: block; }
:root[data-theme="dark"] .app-icon-sun { display: block; }
:root[data-theme="dark"] .app-icon-moon { display: none; }

/* ---------- collapsed rail ---------- */
.app-shell.is-rail .app-brandname,
.app-shell.is-rail .app-nav-section,
.app-shell.is-rail .app-nav-label,
.app-shell.is-rail .app-nav-badge,
.app-shell.is-rail .app-sidebar-user { display: none; }
.app-shell.is-rail .app-sidebar { width: var(--sidebar-w-collapsed); }
.app-shell.is-rail .app-sidebar-head { justify-content: center; padding: 0; flex-wrap: wrap; }
.app-shell.is-rail .app-nav { padding: 6px 9px; }
.app-shell.is-rail .app-sidebar .menu-item { justify-content: center; padding: 0; }
.app-shell.is-rail .app-sidebar-foot {
  grid-template-columns: 1fr; justify-items: center; gap: 8px; padding: 10px 6px;
}

/* ---------- main / content ---------- */
.app-main { min-width: 0; display: flex; flex-direction: column; background: var(--canvas); }
.app-content {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 70px) 72px;
  display: flex; flex-direction: column; gap: 0;
  min-width: 0;
}

/* ---------- status ribbon (glass band over the canvas) ---------- */
.app-ribbon {
  position: sticky; top: 0; z-index: var(--z-ribbon);
  min-height: 58px;
  display: grid; grid-template-columns: minmax(0, 1fr); align-items: stretch;
  background: color-mix(in srgb, var(--canvas) 92%, transparent);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  overflow-x: auto; scrollbar-width: none;
}
.app-ribbon::-webkit-scrollbar { display: none; }
.app-ribbon-context, .app-ribbon-mode { display: none; } /* legacy ribbon slots */
.app-ribbon-signals { display: flex; align-items: center; min-width: 0; padding-left: clamp(24px, 4vw, 70px); }
.app-ribbon-item {
  position: relative;
  appearance: none; background: none; border: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 7px;
  min-height: 58px; height: 58px; padding: 0 20px; white-space: nowrap;
  font: 500 13px/1 var(--font-ui);
  color: var(--text-2);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.app-ribbon-item + .app-ribbon-item::before {
  content: ""; position: absolute; left: 0; top: 19px;
  width: 1px; height: 20px; background: var(--border);
}
.app-ribbon-item.is-bad { color: var(--warning); }
.app-ribbon-item.is-bad .ui-dot.is-warning,
.app-ribbon-item.is-bad .ui-dot.is-danger { background: var(--danger); }
.app-ribbon-item:focus-visible { outline: none; box-shadow: inset var(--focus-ring); }
.app-ribbon-item .icon { width: 13px; height: 13px; opacity: 0.75; }

/* ---------- mobile toggle + drawer ---------- */
.app-menutoggle {
  display: none; position: fixed; top: 10px; left: 10px; z-index: calc(var(--z-drawer) + 1);
  width: 40px; height: 40px; border-radius: var(--r-sm);
  background: var(--surface-raised); border: 1px solid var(--border-strong); color: var(--text);
  cursor: pointer; place-items: center;
}
.app-backdrop {
  position: fixed; inset: 0; z-index: calc(var(--z-drawer) - 1);
  background: rgba(7, 4, 10, 0.6); opacity: 0; pointer-events: none;
  transition: opacity var(--t-med) var(--ease);
}

/* ---------- login (architectural split; story panel stays dark) ---------- */
#loginSection { background: var(--canvas); }
.app-login {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(420px, 0.82fr);
  align-items: stretch;
  min-height: 100vh; padding: 0;
  background: #101319;
}
.app-login-story {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: clamp(28px, 5vw, 72px);
  overflow: hidden;
  background: #101319;
}
.app-login-story::after {
  content: "";
  position: absolute;
  left: clamp(28px, 5vw, 72px); right: 0; bottom: 26%; height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), transparent);
  box-shadow: 0 -80px 0 rgba(255, 255, 255, 0.025), 0 80px 0 rgba(255, 255, 255, 0.025);
  pointer-events: none;
}
.app-login-brand { display: flex; align-items: center; gap: 12px; }
.app-login-brand .app-brandmark { width: 42px; height: 42px; font-size: 24px; border-radius: 11px 11px 11px 4px; }
.app-login-brand strong { display: block; font: 700 17px var(--font-display); letter-spacing: -0.02em; color: #fff; }
.app-login-brand span { display: block; font: 500 9.5px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: #788392; margin-top: 3px; }
.app-login-copy { position: relative; z-index: 1; max-width: 720px; }
.app-login-copy h1 {
  margin: 14px 0 20px;
  font: 700 clamp(38px, 5.8vw, 78px)/0.98 var(--font-display);
  letter-spacing: -0.055em;
  color: #fff;
}
.app-login-copy p { max-width: 58ch; color: #aab4c1; font-size: clamp(15px, 1.4vw, 18px); }
.app-login-signals {
  position: relative; z-index: 1;
  display: flex; gap: 24px; flex-wrap: wrap;
  color: #7f8b99;
  font: 500 10px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase;
}
.app-login-signals span { display: inline-flex; align-items: center; gap: 7px; }
.app-login-access {
  min-height: 100vh;
  display: grid; place-items: center;
  padding: clamp(24px, 5vw, 72px);
  border-left: 1px solid var(--border);
  background: var(--canvas);
  color: var(--text);
}
.app-login-card {
  width: 100%; max-width: 420px;
  display: flex; flex-direction: column; gap: 24px;
  padding: 0; border: 0; border-radius: 0; box-shadow: none; background: transparent;
}
.app-login-card-head h2 { margin-top: 8px; font: 700 25px/1.2 var(--font-display); letter-spacing: -0.03em; }
.app-login-card-head p { margin-top: 7px; color: var(--text-3); font-size: 13px; }
.app-login-card .ui-input { min-height: 46px; background: var(--input-bg); }
#loginSection form { display: flex; flex-direction: column; gap: var(--sp-4); }
#loginSection .ui-btn.is-touch { margin-top: 4px; }
#loginAlert:empty { display: none; }
#loginAlert .ui-banner { margin-bottom: var(--sp-2); }
.app-login-foot { display: flex; align-items: center; justify-content: center; gap: 7px; font: 400 9.5px var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }

/* legacy auth.js transient state */
#loginForm .fa-spinner { margin-right: 7px; }

/* ---------- hover gating ---------- */
@media (hover: hover) and (pointer: fine) {
  .app-nav-collapse:hover { background: var(--surface-hover); color: var(--text); }
  .app-sidebar .menu-item:hover { background: var(--surface-hover); color: var(--text); }
  .app-sidebar .menu-item:hover .icon { color: var(--text); }
  .app-foot-btn:hover { background: var(--surface-hover); color: var(--text); }
  .app-ribbon-item:hover { background: var(--surface-hover); color: var(--text); }
  .app-ribbon-item.is-bad:hover { background: var(--danger-surface); }
}

/* ---------- tablet (901–1024) ---------- */
@media (min-width: 901px) and (max-width: 1024px) {
  .app-content { padding-inline: 24px; }
  .app-ribbon-signals { padding-left: 24px; }
}

/* ---------- mobile: drawer (<900) ---------- */
@media (max-width: 900px) {
  .app-shell { grid-template-columns: minmax(0, 1fr); }
  .app-menutoggle { display: grid; }
  .app-sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; height: 100vh;
    width: min(300px, 84vw);
    transform: translateX(-102%);
    transition: transform var(--t-med) var(--ease-drawer);
    box-shadow: none; z-index: var(--z-drawer);
  }
  .app-sidebar.is-open { transform: none; box-shadow: var(--shadow-overlay); }
  .app-sidebar.is-collapsed { width: min(300px, 84vw); }
  .app-backdrop.is-open { opacity: 1; pointer-events: auto; }
  .app-content { padding: 24px 18px 52px; }
  .app-ribbon {
    min-height: 52px;
    padding-left: 58px;
    background: color-mix(in srgb, var(--canvas) 95%, transparent);
  }
  .app-ribbon-signals { min-height: 52px; padding-left: 0; }
  .app-ribbon-item { min-height: 52px; height: 52px; padding: 0 13px; }
  .app-login { grid-template-columns: 1fr; }
  .app-login-story { min-height: auto; padding: 28px 22px 34px; gap: 48px; }
  .app-login-story::after { display: none; }
  .app-login-copy h1 { font-size: clamp(34px, 12vw, 52px); }
  .app-login-copy p { font-size: 14px; }
  .app-login-signals { display: none; }
  .app-login-access {
    min-height: auto; place-items: start stretch;
    padding: 34px 22px 48px;
    border-left: 0; border-top: 1px solid var(--border);
  }
  .app-login-card { max-width: none; }
  /* drawer is always expanded regardless of desktop rail state */
  .app-shell.is-rail .app-brandname,
  .app-shell.is-rail .app-nav-section,
  .app-shell.is-rail .app-nav-label,
  .app-shell.is-rail .app-sidebar-user { display: flex; }
  .app-shell.is-rail .app-sidebar-head { justify-content: flex-start; }
  .app-shell.is-rail .app-sidebar .menu-item { justify-content: flex-start; }
}

/* login/panel visibility guard (auth.js contract) */
#adminPanel[style*="display:block"] ~ #loginSection,
#adminPanel[style*="display: block"] ~ #loginSection { display: none !important; }

/* ---------- sticky-ribbon compensation ----------
   The ribbon is sticky; without scroll margins, jumped/scrolled
   sections slide underneath it and their titles hide behind the
   ribbon border (reads as stray horizontal lines mid-page). */
.app-main [id] { scroll-margin-top: calc(var(--topbar-h) + 16px); }