/* Grade-It — 2026 shared page primitives (marketing, info, account, auth) */
/* Depends on chrome-2026.css for design tokens (--gi-* variables, fonts). */

/* ---------- Page wrapper ---------- */
.gi-page {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 24px 72px;
  font-family: var(--gi-font);
  color: var(--gi-ink);
}

.gi-page--narrow {
  max-width: 720px;
}

.gi-page--wide {
  max-width: 1180px;
}

/* ---------- Page header ---------- */
.gi-page__head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
}

.gi-page__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--gi-accent-soft);
  color: var(--gi-accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gi-page__title {
  font-size: clamp(32px, 4.4vw, 48px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--gi-ink);
}

.gi-page__lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--gi-muted);
  max-width: 60ch;
  margin: 0;
}

/* ---------- Long-form prose ---------- */
.gi-prose {
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--gi-ink-soft);
}

.gi-prose > * + * {
  margin-top: 1em;
}

.gi-prose p {
  margin: 0 0 1em;
}

.gi-prose h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gi-ink);
  margin-top: 1.6em;
  margin-bottom: 0.4em;
}

.gi-prose h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gi-ink);
  margin-top: 1.4em;
  margin-bottom: 0.4em;
}

.gi-prose strong, .gi-prose b {
  color: var(--gi-ink);
  font-weight: 700;
}

.gi-prose a {
  color: var(--gi-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.gi-prose a:hover {
  color: #3730a3;
}

.gi-prose ul, .gi-prose ol {
  padding-left: 1.5em;
  margin: 0 0 1em;
}

.gi-prose li {
  margin-bottom: 0.4em;
}

.gi-prose figure {
  margin: 1.6em 0;
  text-align: center;
}

.gi-prose figcaption {
  font-size: 13.5px;
  color: var(--gi-muted);
  font-style: italic;
  margin-top: 0.5em;
}

.gi-prose img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--gi-line);
  box-shadow: var(--gi-shadow);
}

/* ---------- Card surfaces ---------- */
.gi-card-surface {
  background: var(--gi-card);
  border: 1px solid var(--gi-line);
  border-radius: 18px;
  box-shadow: var(--gi-shadow-sm);
  padding: 28px;
}

.gi-card-surface + .gi-card-surface {
  margin-top: 20px;
}

.gi-card-surface__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.005em;
  margin: 0 0 6px;
  color: var(--gi-ink);
}

.gi-card-surface__sub {
  font-size: 14px;
  color: var(--gi-muted);
  margin: 0 0 18px;
}

/* ---------- Demo grid ---------- */
.gi-demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.gi-demo-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  background: var(--gi-card);
  border: 1px solid var(--gi-line);
  border-radius: 16px;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.gi-demo-card:hover {
  border-color: var(--gi-line-strong);
  transform: translateY(-2px);
  box-shadow: var(--gi-shadow);
}

.gi-demo-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.gi-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.gi-tag--math    { background: #eef2ff; color: #4338ca; }
.gi-tag--chem    { background: #ecfdf5; color: #047857; }
.gi-tag--engr    { background: #fff7ed; color: #c2410c; }
.gi-tag--biz     { background: #fef2f2; color: #b91c1c; }
.gi-tag--neutral { background: var(--gi-bg); color: var(--gi-ink-soft); }

.gi-demo-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gi-ink);
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.gi-demo-card__features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.gi-demo-card__features li {
  font-size: 12.5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--gi-bg);
  color: var(--gi-muted);
  border: 1px solid var(--gi-line);
}

.gi-demo-card__actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 6px;
  border-top: 1px dashed var(--gi-line);
}

/* ---------- Forms ---------- */
.gi-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gi-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gi-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--gi-ink);
}

.gi-field .helptext,
.gi-field small {
  font-size: 12px;
  color: var(--gi-muted);
}

.gi-form input[type="text"],
.gi-form input[type="email"],
.gi-form input[type="password"],
.gi-form input[type="number"],
.gi-form input[type="search"],
.gi-form input:not([type]),
.gi-form select,
.gi-form textarea {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1px solid var(--gi-line-strong);
  border-radius: 12px;
  background: #fff;
  font-family: inherit;
  font-size: 15px;
  color: var(--gi-ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.gi-form textarea {
  height: auto;
  min-height: 120px;
  padding: 12px 14px;
  resize: vertical;
}

.gi-form input:focus,
.gi-form select:focus,
.gi-form textarea:focus {
  outline: none;
  border-color: var(--gi-accent);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.14);
}

.gi-form .errorlist {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: #b91c1c;
}

.gi-form__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* ---------- Buttons (page-level reuse from home-2026) ---------- */
a.gi-btn,
button.gi-btn,
input.gi-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

/* Scoped to inner pages/auth — homepage uses home-2026.css (incl. dark callout) */
.gi-page a.gi-btn--primary,
.gi-page button.gi-btn--primary,
.gi-page input.gi-btn--primary,
.gi-auth a.gi-btn--primary,
.gi-auth button.gi-btn--primary,
.gi-auth input.gi-btn--primary {
  background: var(--gi-ink);
  color: #fff !important;
  border-color: var(--gi-ink);
}

.gi-page a.gi-btn--primary:hover,
.gi-page button.gi-btn--primary:hover,
.gi-page input.gi-btn--primary:hover,
.gi-auth a.gi-btn--primary:hover,
.gi-auth button.gi-btn--primary:hover,
.gi-auth input.gi-btn--primary:hover {
  background: #14193a;
  border-color: #14193a;
  transform: translateY(-1px);
}

.gi-page a.gi-btn--ghost,
.gi-page button.gi-btn--ghost,
.gi-page input.gi-btn--ghost,
.gi-auth a.gi-btn--ghost,
.gi-auth button.gi-btn--ghost,
.gi-auth input.gi-btn--ghost {
  background: #fff;
  color: var(--gi-ink) !important;
  border-color: var(--gi-line-strong);
}

.gi-page a.gi-btn--ghost:hover,
.gi-page button.gi-btn--ghost:hover,
.gi-page input.gi-btn--ghost:hover,
.gi-auth a.gi-btn--ghost:hover,
.gi-auth button.gi-btn--ghost:hover,
.gi-auth input.gi-btn--ghost:hover {
  border-color: var(--gi-ink);
  color: var(--gi-ink) !important;
}

.gi-page a.gi-btn--accent,
.gi-page button.gi-btn--accent,
.gi-page input.gi-btn--accent,
.gi-auth a.gi-btn--accent,
.gi-auth button.gi-btn--accent,
.gi-auth input.gi-btn--accent {
  background: var(--gi-accent);
  color: #fff !important;
  border-color: var(--gi-accent);
}

.gi-page a.gi-btn--accent:hover,
.gi-page button.gi-btn--accent:hover,
.gi-page input.gi-btn--accent:hover,
.gi-auth a.gi-btn--accent:hover,
.gi-auth button.gi-btn--accent:hover,
.gi-auth input.gi-btn--accent:hover {
  background: #3730a3;
  border-color: #3730a3;
}

a.gi-btn--sm,
button.gi-btn--sm,
input.gi-btn--sm {
  height: 34px;
  padding: 0 14px;
  font-size: 13px;
}

a.gi-btn--block,
button.gi-btn--block,
input.gi-btn--block {
  width: 100%;
}

/* ---------- Definition list ---------- */
.gi-deflist {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 8px 20px;
  margin: 0;
  font-size: 14.5px;
}

.gi-deflist dt {
  color: var(--gi-muted);
  font-weight: 500;
}

.gi-deflist dd {
  margin: 0;
  color: var(--gi-ink);
  font-weight: 500;
}

/* ---------- Auth card (login, password reset, etc.) ---------- */
.gi-auth {
  min-height: calc(100vh - 240px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.gi-auth__card {
  width: 100%;
  max-width: 420px;
  background: var(--gi-card);
  border: 1px solid var(--gi-line);
  border-radius: 22px;
  box-shadow: var(--gi-shadow);
  padding: 36px 32px;
}

.gi-auth__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.gi-auth__brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: contain;
  display: block;
}

.gi-auth__title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.gi-auth__sub {
  font-size: 14px;
  color: var(--gi-muted);
  margin: 0 0 22px;
}

.gi-auth__foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--gi-line);
  font-size: 13.5px;
  color: var(--gi-muted);
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.gi-auth__foot a {
  color: var(--gi-accent);
  text-decoration: none;
  font-weight: 500;
}

.gi-auth__foot a:hover {
  text-decoration: underline;
}

.gi-auth__alert {
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 13.5px;
  margin-bottom: 16px;
  border: 1px solid transparent;
}

.gi-auth__alert--error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #b91c1c;
}

.gi-auth__alert--info {
  background: #eef2ff;
  border-color: #c7d2fe;
  color: #4338ca;
}

.gi-auth__alert--success {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #047857;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .gi-page {
    padding: 32px 18px 56px;
  }
  .gi-page__title {
    font-size: clamp(28px, 7vw, 36px);
  }
  .gi-deflist {
    grid-template-columns: 1fr;
    gap: 0 0;
  }
  .gi-deflist dt {
    margin-top: 8px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  .gi-auth__card {
    padding: 28px 22px;
    border-radius: 18px;
  }
}