/* Grammarable - "Ink & Paper"
   Ink navy on warm paper, teal accent, sticky-note memory tricks.
   Single stylesheet, no build step. Mobile-first. */

:root {
  --paper:      #faf7f1;
  --paper-2:    #f2ecdf;
  --ink:        #20304a;
  --ink-soft:   #566379;
  --line:       #e3dbc9;
  --teal:       #0e7a6e;
  --teal-dark:  #0a5f56;
  --teal-soft:  #e0efec;
  --red:        #b3423a;
  --red-soft:   #f8e9e6;
  --green:      #2e7d4f;
  --green-soft: #e7f2ea;
  --note:       #fff3b8;
  --note-edge:  #eeda86;
  --radius:     10px;
  --serif:      "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:       -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow:     0 1px 2px rgba(32, 48, 74, .06), 0 4px 14px rgba(32, 48, 74, .06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .logo-word { font-family: var(--serif); line-height: 1.2; color: var(--ink); }
h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); margin: 0 0 .5em; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--teal-dark); }

.wrap { max-width: 62rem; margin: 0 auto; padding: 0 1.25rem; }

/* ---------- header ---------- */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.header-inner {
  display: flex; align-items: center; gap: 1rem;
  padding-top: .7rem; padding-bottom: .7rem;
  flex-wrap: wrap;
}
.logo { display: flex; align-items: center; gap: .55rem; text-decoration: none; }
.logo-mark { flex: 0 0 auto; border-radius: 8px; }
.logo-word { font-weight: 700; font-size: 1.3rem; color: var(--ink); }
.site-nav { display: flex; gap: .25rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--ink-soft); text-decoration: none; font-size: .95rem;
  padding: .35rem .6rem; border-radius: 6px;
}
.site-nav a:hover { background: var(--paper-2); color: var(--ink); }
.site-nav a.active { background: var(--teal-soft); color: var(--teal-dark); font-weight: 600; }
.header-search { margin-left: auto; }
.header-search input {
  border: 1px solid var(--line); border-radius: 999px;
  background: #fff; padding: .4rem .9rem; font-size: .9rem; width: 11rem;
}
.header-search input:focus { outline: 2px solid var(--teal); border-color: var(--teal); }

@media (max-width: 720px) {
  .header-search { margin-left: 0; width: 100%; }
  .header-search input { width: 100%; }
}

/* ---------- hero ---------- */
.hero { text-align: center; padding: 3.2rem 0 2.2rem; }
.hero-small { padding: 2.2rem 0 1.2rem; }
.hero-sub {
  color: var(--ink-soft); font-size: 1.15rem;
  max-width: 38rem; margin: 0 auto 1.4rem;
}
.hero-search {
  display: flex; gap: .5rem; max-width: 30rem; margin: 0 auto;
}
.hero-search input {
  flex: 1; border: 1px solid var(--line); border-radius: var(--radius);
  padding: .7rem 1rem; font-size: 1rem; background: #fff;
}
.hero-search input:focus { outline: 2px solid var(--teal); border-color: var(--teal); }
.hero-search button {
  border: 0; border-radius: var(--radius); background: var(--teal); color: #fff;
  font-size: 1rem; font-weight: 600; padding: .7rem 1.2rem; cursor: pointer;
}
.hero-search button:hover { background: var(--teal-dark); }

/* ---------- sections & cards ---------- */
.section { margin: 2.6rem 0; }
.section-title {
  font-size: 1.05rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--ink-soft); font-family: var(--sans); font-weight: 700;
  margin-bottom: 1.1rem;
}
.card-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
}
.card {
  display: block; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem 1.2rem;
  text-decoration: none; color: var(--ink); box-shadow: var(--shadow);
  transition: transform .12s ease, border-color .12s ease;
}
a.card:hover { transform: translateY(-2px); border-color: var(--teal); }
.card h3 { margin: .2rem 0 .4rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.card-kicker {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--teal-dark); font-weight: 700;
}
.card-meta { display: inline-block; margin-top: .6rem; font-size: .85rem; color: var(--ink-soft); }

/* ---------- teasers ---------- */
.split-teasers { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); }
.teaser {
  border-radius: var(--radius); padding: 1.6rem 1.5rem;
  border: 1px solid var(--line);
}
.teaser h2 { margin-top: 0; }
.teaser p { color: var(--ink-soft); }
.teaser-daily { background: var(--teal-soft); border-color: #c8e2dd; }
.teaser-teachers { background: var(--paper-2); }
.btn {
  display: inline-block; background: var(--teal); color: #fff;
  border-radius: var(--radius); padding: .6rem 1.1rem; font-weight: 600;
  text-decoration: none; border: 1px solid var(--teal);
}
.btn:hover { background: var(--teal-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--teal-dark); }
.btn-outline:hover { background: var(--teal-soft); color: var(--teal-dark); }

/* ---------- breadcrumb, misc ---------- */
.breadcrumb { font-size: .9rem; color: var(--ink-soft); margin: 1.4rem 0 0; }
.breadcrumb a { color: var(--ink-soft); }
.empty-note { color: var(--ink-soft); text-align: center; margin: 3rem 0; }
.draft-banner {
  background: var(--note); border: 1px dashed var(--note-edge);
  padding: .5rem .9rem; border-radius: 8px; font-size: .9rem;
}

/* ---------- entry article ---------- */
.entry { max-width: 44rem; margin: 1.2rem auto 0; }
.entry h1 { margin-top: .6rem; }
.entry-body h2 { margin-top: 1.8em; }
.entry-body p { margin: 1em 0; }
.entry-body code {
  background: var(--paper-2); border-radius: 4px; padding: .1em .35em;
  font-size: .92em;
}

/* wrong vs right examples */
.examples {
  display: grid; gap: 1rem; margin: 2rem 0;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}
.ex-col { border-radius: var(--radius); padding: 1rem 1.2rem; }
.ex-col h2 { margin: 0 0 .6rem; font-size: 1rem; font-family: var(--sans); text-transform: uppercase; letter-spacing: .06em; }
.ex-col ul { margin: 0; padding: 0; list-style: none; }
.ex-col li { padding: .35rem 0; font-size: 1rem; }
.ex-wrong-col { background: var(--red-soft); border: 1px solid #ecd2cd; }
.ex-wrong-col h2 { color: var(--red); }
.ex-wrong { color: var(--red); text-decoration: line-through; text-decoration-thickness: 1.5px; }
.ex-right-col { background: var(--green-soft); border: 1px solid #cfe4d6; }
.ex-right-col h2 { color: var(--green); }
.ex-right { color: var(--green); }

/* memory trick sticky note */
.memory-trick {
  background: var(--note);
  border: 1px solid var(--note-edge);
  border-radius: 2px;
  box-shadow: 2px 4px 10px rgba(32, 48, 74, .14);
  transform: rotate(-1deg);
  max-width: 30rem;
  margin: 2.4rem auto;
  padding: 1.1rem 1.4rem 1.3rem;
  font-size: 1.05rem;
}
.memory-trick p { margin: 0; }
.memory-trick-label {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .1em;
  font-weight: 700; color: #8c7a1e; margin-bottom: .35rem !important;
}

/* related + prev/next */
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { padding: .3rem 0; }
.prev-next {
  display: flex; justify-content: space-between; gap: 1rem;
  margin: 2.5rem 0; flex-wrap: wrap;
}
.pn {
  display: flex; flex-direction: column; text-decoration: none;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: .8rem 1.1rem; max-width: 47%;
}
.pn span { font-size: .8rem; color: var(--ink-soft); }
.pn strong { color: var(--ink); font-family: var(--serif); }
.pn:hover { border-color: var(--teal); }
.pn-next { text-align: right; margin-left: auto; }
@media (max-width: 560px) { .pn { max-width: 100%; width: 100%; } .pn-next { text-align: left; } }

/* ---------- quiz ---------- */
.quiz-block {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.4rem 1.5rem; margin: 2.4rem 0;
}
.quiz-head { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; }
.quiz-head h2 { margin: 0; }
.badge {
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  border-radius: 999px; padding: .18rem .65rem;
}
.badge-easy   { background: var(--green-soft); color: var(--green); }
.badge-medium { background: var(--note);       color: #8c7a1e; }
.badge-hard   { background: var(--red-soft);   color: var(--red); }

.quiz-progress { font-size: .85rem; color: var(--ink-soft); margin: 1rem 0 .4rem; }
.quiz-prompt { font-family: var(--serif); font-size: 1.25rem; margin: .3rem 0 1rem; }
.quiz-choices { display: grid; gap: .55rem; padding: 0; margin: 0; list-style: none; }
.quiz-choice {
  width: 100%; text-align: left; font-size: 1rem; cursor: pointer;
  background: var(--paper); border: 1.5px solid var(--line);
  border-radius: var(--radius); padding: .65rem .95rem; color: var(--ink);
  font-family: var(--sans);
}
.quiz-choice:hover:not(:disabled) { border-color: var(--teal); background: var(--teal-soft); }
.quiz-choice:disabled { cursor: default; opacity: .85; }
.quiz-choice.is-correct { background: var(--green-soft); border-color: var(--green); color: var(--green); font-weight: 600; opacity: 1; }
.quiz-choice.is-wrong { background: var(--red-soft); border-color: var(--red); color: var(--red); opacity: 1; }

.quiz-feedback { border-radius: var(--radius); padding: .8rem 1rem; margin-top: 1rem; font-size: .97rem; }
.quiz-feedback.good { background: var(--green-soft); border: 1px solid #cfe4d6; }
.quiz-feedback.bad  { background: var(--red-soft); border: 1px solid #ecd2cd; }
.quiz-feedback strong { display: block; margin-bottom: .15rem; }

.quiz-next, .quiz-retry, .quiz-share {
  margin-top: 1rem; border: 0; border-radius: var(--radius); cursor: pointer;
  font-size: .97rem; font-weight: 600; padding: .6rem 1.2rem;
}
.quiz-next, .quiz-retry { background: var(--teal); color: #fff; }
.quiz-next:hover, .quiz-retry:hover { background: var(--teal-dark); }
.quiz-share { background: var(--paper-2); color: var(--ink); margin-left: .5rem; border: 1px solid var(--line); }
.quiz-share:hover { border-color: var(--teal); }

.quiz-summary { text-align: center; padding: 1rem 0 .4rem; }
.quiz-score { font-family: var(--serif); font-size: 2.4rem; margin: .2rem 0; }
.quiz-summary p { color: var(--ink-soft); }

.quiz-entry-link { color: var(--ink-soft); margin-top: 1.4rem; }

/* streak box on daily page */
.streak-box {
  display: inline-flex; align-items: center; gap: .5rem;
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: .45rem 1.1rem; box-shadow: var(--shadow); font-size: 1rem;
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: 4rem; border-top: 1px solid var(--line); background: var(--paper-2);
  font-size: .93rem; color: var(--ink-soft);
}
.footer-inner {
  display: grid; gap: 2rem; padding: 2.2rem 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}
.footer-logo { font-family: var(--serif); font-weight: 700; font-size: 1.15rem; color: var(--ink); margin: 0 0 .4rem; }
.footer-heading { font-weight: 700; color: var(--ink); margin: 0 0 .5rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { padding: .18rem 0; }
.footer-col a { color: var(--ink-soft); }
.footer-col a:hover { color: var(--teal-dark); }
.signup-placeholder { display: flex; gap: .5rem; margin-top: .6rem; }
.signup-placeholder input {
  flex: 1; border: 1px solid var(--line); border-radius: 8px; padding: .5rem .8rem;
  background: #fff;
}
.signup-placeholder button {
  border: 0; border-radius: 8px; background: var(--ink-soft); color: #fff;
  padding: .5rem 1rem; font-weight: 600;
}
.signup-note { font-size: .8rem; margin-top: .4rem; }
.footer-legal { padding: 0 1.25rem 1.6rem; font-size: .85rem; }

/* ---------- admin ---------- */
.admin-wrap { max-width: 56rem; margin: 2rem auto; padding: 0 1.25rem; }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; box-shadow: var(--shadow); border-radius: var(--radius); overflow: hidden; }
.admin-table th, .admin-table td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--line); font-size: .95rem; }
.admin-table th { background: var(--paper-2); }
.admin-form label { display: block; font-weight: 600; margin: 1.1rem 0 .3rem; }
.admin-form input[type=text], .admin-form input[type=password],
.admin-form select, .admin-form textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 8px;
  padding: .55rem .8rem; font-size: .97rem; background: #fff; font-family: inherit;
}
.admin-form textarea { min-height: 8rem; }
.admin-form textarea.code { font-family: ui-monospace, Consolas, monospace; font-size: .88rem; min-height: 12rem; }
.admin-form .hint { font-size: .84rem; color: var(--ink-soft); margin-top: .25rem; }
.admin-actions { margin-top: 1.5rem; display: flex; gap: .7rem; align-items: center; }
.flash-ok { background: var(--green-soft); border: 1px solid #cfe4d6; border-radius: 8px; padding: .6rem .9rem; }
.flash-err { background: var(--red-soft); border: 1px solid #ecd2cd; border-radius: 8px; padding: .6rem .9rem; }
.flash-err ul { margin: .3rem 0 0; padding-left: 1.2rem; }
.status-pill { font-size: .75rem; font-weight: 700; border-radius: 999px; padding: .15rem .6rem; }
.status-published { background: var(--green-soft); color: var(--green); }
.status-draft { background: var(--note); color: #8c7a1e; }
.inline-form { display: inline; }
.link-btn { background: none; border: 0; color: var(--teal); cursor: pointer; font-size: .95rem; padding: 0; text-decoration: underline; }