/* ============================================
   NEURAPHIC WORKERS — shell.css
   Nav, mobile menu, footer, app layout, auth shell
   ============================================ */

/* --- Header / nav --- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  background: transparent;
  transition: background .25s, backdrop-filter .25s, border-color .25s, color .25s;
}
.header--s {
  background: rgba(240,241,243,0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(19,19,20,0.06);
}
/* Over-dark variant: transparent header sitting on the dark hero.
   Flips link colour to pearl; scrolled state below cancels it. */
.header--over-dark:not(.header--s) .nav__name,
.header--over-dark:not(.header--s) .nav__name--sub,
.header--over-dark:not(.header--s) .nav__links > a,
.header--over-dark:not(.header--s) .nav__links > .nav__group > button,
.header--over-dark:not(.header--s) .nav__signin {
  color: var(--bg);
}
.header--over-dark:not(.header--s) .nav__name--sub { color: rgba(240,241,243,0.6); }
.header--over-dark:not(.header--s) .nav__cta {
  background: rgba(240,241,243,0.08);
  color: var(--bg);
  border: 1px solid rgba(240,241,243,0.2);
}
.header--over-dark:not(.header--s) .nav__cta:hover { background: rgba(240,241,243,0.14); }
.header--over-dark:not(.header--s) .burger span { background: var(--bg); }
.nav {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 48px);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 4px 6px 0;
  transition: opacity .2s;
}
.nav__brand:hover { opacity: 0.6; }
.nav__name {
  font-family: var(--head);
  font-size: 22px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
.nav__name--sub {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--gray);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 2px;
}
.nav__right-group { display: flex; align-items: center; gap: 8px; }
.nav__links { display: flex; align-items: center; gap: 0; }
.nav__links > a,
.nav__links .nav__group > button {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--black);
  padding: 10px 14px;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: opacity .2s, color .2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.nav__links > a:hover,
.nav__links .nav__group > button:hover { opacity: 0.65; }
.nav__links .nav__group > button::after {
  content: '';
  width: 6px; height: 6px;
  border-right: 1.2px solid currentColor;
  border-bottom: 1.2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  margin-left: 2px;
  opacity: 0.7;
  transition: transform .2s;
}
.nav__group { position: relative; }
.nav__group[data-open="true"] > button::after { transform: rotate(-135deg) translateY(0); }

/* Dropdown panel */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 280px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 10px;
  display: grid;
  gap: 2px;
  box-shadow: 0 12px 36px rgba(19,19,20,0.08);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
}
.nav__group[data-open="true"] .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  color: var(--black);
  transition: background .15s;
}
.nav__dropdown a:hover { background: rgba(19,19,20,0.05); }
.nav__dropdown a strong {
  display: block;
  font-family: var(--head);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 2px;
}
.nav__dropdown a span {
  display: block;
  font-size: 12px;
  color: var(--gray);
  line-height: 1.45;
}
.nav__cta {
  display: inline-flex;
  align-items: center;
  background: var(--black);
  color: var(--bg);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  transition: background .2s;
}
.nav__cta:hover { background: var(--ink-hover); }
.nav__signin {
  font-size: 14px;
  font-weight: 500;
  color: var(--black);
  padding: 8px 14px;
  transition: opacity .2s;
}
.nav__signin:hover { opacity: 0.6; }

.burger {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: none;
  border: none;
}
.burger span {
  width: 18px;
  height: 1.5px;
  background: var(--black);
  transition: all .2s;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* --- Mobile menu --- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 80px; left: 0; right: 0; bottom: 0;
  background: var(--bg);
  z-index: 99;
  padding: 24px clamp(24px, 4vw, 48px);
  flex-direction: column;
  overflow-y: auto;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  font-size: 17px;
  font-weight: 500;
  color: var(--black);
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.mobile-menu hr { border: none; border-top: 1px solid var(--line); margin: 8px 0; }
.mobile-menu .btn { margin-top: 16px; }

/* --- Footer --- */
.footer {
  background: var(--black);
  padding: clamp(48px, 6vh, 72px) 0 clamp(24px, 3vh, 36px);
  color: var(--gray);
}
.footer__main {
  display: grid;
  grid-template-columns: 160px repeat(4, 1fr);
  gap: clamp(24px, 2.8vw, 40px);
  margin-bottom: clamp(40px, 5vh, 64px);
}
.footer__brand-col { display: flex; flex-direction: column; align-items: flex-start; }
.footer__logo {
  font-family: var(--head);
  font-size: 22px;
  font-weight: 700;
  color: var(--bg);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.footer__tag {
  font-size: 12px;
  color: var(--gray);
  margin-top: 12px;
  max-width: 140px;
  line-height: 1.5;
}
.footer__col h5 {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--bg);
  margin-bottom: 12px;
  letter-spacing: -0.005em;
}
.footer__col a {
  display: block;
  font-size: 13px;
  color: var(--gray);
  padding: 2px 0;
  transition: color .2s;
  line-height: 1.6;
}
.footer__col a:hover { color: var(--bg); }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: clamp(24px, 3vh, 36px);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer__copy { font-size: 12px; color: var(--gray); margin: 0; line-height: 1.5; }
.footer__social { display: flex; gap: 18px; }
.footer__social a { color: var(--gray); transition: color .2s; display: inline-flex; }
.footer__social a:hover { color: var(--bg); }
.footer ::selection { background: rgba(255,255,255,0.25); color: var(--bg); }

/* --- App layout (sidebar + content) --- */
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  padding-top: var(--nav-h);
}
.sidebar {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--bg);
  border-right: 1px solid var(--line);
  padding: 24px 20px;
  overflow-y: auto;
}
.sidebar__section { margin-bottom: 24px; }
.sidebar__section h6 {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  padding: 0 10px;
}
.sidebar__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--black);
  transition: background .15s;
}
.sidebar__link:hover { background: rgba(19,19,20,0.05); }
.sidebar__link--active { background: rgba(19,19,20,0.08); font-weight: 500; }
.sidebar__link svg { width: 16px; height: 16px; flex-shrink: 0; }

.content {
  grid-column: 2;
  padding: 32px clamp(24px, 4vw, 48px) 64px;
  min-width: 0;
}
.page__title {
  font-family: var(--head);
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.page__subtitle {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 640px;
}

/* --- Auth shell --- */
.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 40px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: clamp(28px, 4vw, 40px);
  box-shadow: 0 2px 20px rgba(19,19,20,0.04);
}
.auth-card h1 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 6px;
}
.auth-card__sub {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 28px;
}
.auth-card__footer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--gray);
  text-align: center;
}
.auth-card__footer a { color: var(--black); font-weight: 500; }

/* --- Auth helpers (used by signin/signup/forgot/reset/invite) --- */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.auth-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  margin-top: 4px;
  flex-wrap: wrap;
}
.auth-links a { color: var(--black); border-bottom: 1px solid transparent; transition: border-color .15s; }
.auth-links a:hover { border-color: var(--black); }
.auth-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px 0;
  color: var(--gray);
  font-size: 14px;
}
.auth-loading::before {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid var(--line);
  border-top-color: var(--black);
  border-radius: 50%;
  animation: auth-spin .8s linear infinite;
}
@keyframes auth-spin { to { transform: rotate(360deg); } }
.auth-confirm {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(19,19,20,0.02);
  font-size: 14px;
  color: var(--black);
  line-height: 1.6;
}
.invite-meta {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(19,19,20,0.02);
  font-size: 13px;
  margin-bottom: 20px;
}
.invite-meta dt { color: var(--gray); text-transform: uppercase; letter-spacing: 0.06em; font-size: 11px; }
.invite-meta dd { color: var(--black); font-weight: 500; }
.strength-meter {
  display: flex;
  gap: 4px;
  margin-top: 6px;
  height: 4px;
}
.strength-meter__bar {
  height: 100%;
  border-radius: 2px;
  background: var(--line);
  transition: background .2s, flex .2s;
  flex: 1;
}
.strength-meter__bar[data-state="weak"]   { background: var(--red); }
.strength-meter__bar[data-state="fair"]   { background: var(--amber); }
.strength-meter__bar[data-state="strong"] { background: var(--green); }
.trust-signals {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 18px;
  font-size: 12px;
  color: var(--gray);
  flex-wrap: wrap;
}
.trust-signals span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.trust-signals svg { width: 12px; height: 12px; flex-shrink: 0; }
@media (max-width: 480px) {
  .field-row { grid-template-columns: 1fr; }
}

/* --- Responsive --- */
@media (max-width: 960px) {
  .nav__links, .nav__right-group { display: none; }
  .burger { display: flex; }
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .content { grid-column: 1; padding: 24px; }
  .footer__main { grid-template-columns: repeat(3, 1fr); }
  .footer__brand-col { grid-column: 1 / -1; margin-bottom: 8px; }
}
@media (max-width: 640px) {
  .footer__main { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer__brand-col { grid-column: 1 / -1; }
}