/* ========================================================================
   Cuaderno — a Spanish tutor's notebook.
   Aesthetic: editorial / hand-corrected manuscript.
   Type: Playfair Display (display) · Crimson Pro (body) · Caveat (handwritten)
   Palette: cream paper · sepia ink · carmine corrections · forest idiomatic ·
            burnt-ochre marginalia.
   ======================================================================== */

:root {
  --paper: #f3ead7;
  --paper-deep: #ebdfc3;
  --paper-edge: #e1d2af;
  --ink: #1f1612;
  --ink-soft: #3a2e26;
  --rule: #cdbf9d;
  --rule-soft: #ddcfac;
  --carmine: #a32418;       /* corrections */
  --carmine-soft: #f0d3cd;
  --forest: #355d34;        /* idiomatic */
  --forest-soft: #d8e3cf;
  --ochre: #b8722a;         /* marginalia / accents */
  --ochre-soft: #f1dabb;
  --sepia: #6b4f33;
  --shadow: 0 1px 0 rgba(31,22,18,0.08), 0 12px 36px -22px rgba(31,22,18,0.35);

  --serif-display: 'Playfair Display', 'Iowan Old Style', 'Charter', Georgia, serif;
  --serif-body: 'Crimson Pro', 'Iowan Old Style', 'Charter', Georgia, serif;
  --hand: 'Caveat', 'Bradley Hand', cursive;
  --reading: 1.05rem/1.55 var(--serif-body);
}

* { box-sizing: border-box; -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }

html {
  background: var(--paper);
  color: var(--ink);
  font: var(--reading);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(ellipse at top, transparent 60%, rgba(107,79,51,0.08) 100%),
    var(--paper);
  min-height: 100vh;
  position: relative;
  padding-bottom: 60px;
}

/* paper grain — fixed, behind everything */
.grain {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
  mix-blend-mode: multiply;
}

/* ------------------------ HEADER / MASTHEAD ------------------------ */

header.paper-edge {
  position: relative;
  z-index: 1;
  padding: 28px 22px 18px;
  text-align: center;
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(to bottom, var(--paper-deep) 0%, var(--paper) 100%);
}

.masthead { position: relative; }
.masthead .mark {
  position: absolute;
  top: -6px;
  right: 4px;
  font: 500 13px/1 var(--hand);
  color: var(--ochre);
  letter-spacing: 0.04em;
}
.masthead h1 {
  margin: 0;
  font: 700 italic 38px/1 var(--serif-display);
  letter-spacing: 0.005em;
  color: var(--ink);
}
.masthead h1::after {
  content: "";
  display: block;
  width: 56px;
  height: 1px;
  background: var(--ochre);
  margin: 6px auto 0;
}
.masthead .sub {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  margin-top: 6px;
}

nav {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 4px;
  flex-wrap: wrap;
}
nav .dot { color: var(--rule); font-size: 14px; }
.page-link {
  background: none;
  border: 0;
  padding: 6px 4px;
  color: var(--ink-soft);
  font: 500 13px/1 var(--serif-body);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  position: relative;
  transition: color 0.15s ease;
}
.page-link:hover { color: var(--carmine); }
.page-link.active { color: var(--carmine); }
.page-link.active::after {
  content: "";
  position: absolute;
  left: 4px; right: 4px; bottom: 0;
  height: 2px;
  background: var(--carmine);
  border-radius: 1px;
  transform-origin: left;
  animation: drawUnderline 0.35s ease-out;
}
@keyframes drawUnderline {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ------------------------ MAIN ------------------------ */

main {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 28px 22px;
}

.tab { display: none; animation: fadeIn 0.3s ease-out; }
.tab.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-head h2 {
  font: 700 italic 28px/1 var(--serif-display);
  margin: 0 0 6px;
  color: var(--ink);
}
.muted { color: var(--sepia); }
.muted.small { font-size: 13px; }
.section-head p { margin: 0 0 18px; font-size: 14px; line-height: 1.5; }

/* ------------------------ FORMS / FIELDS ------------------------ */

.field { display: block; margin: 0 0 14px; }
.field.inline { display: inline-flex; flex-direction: column; margin-right: 12px; }
.field .lbl {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  margin-bottom: 6px;
}
.field .lbl i { font-style: italic; text-transform: none; letter-spacing: 0; color: var(--ochre); margin-left: 4px; }

input[type=text], input[type=password], input[type=number],
textarea, select {
  width: 100%;
  font: 400 16px/1.45 var(--serif-body);
  color: var(--ink);
  background: rgba(255,253,247,0.55);
  border: 0;
  border-bottom: 1.5px solid var(--rule);
  padding: 8px 4px;
  border-radius: 0;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  -webkit-appearance: none;
  appearance: none;
}
input[type=number] { width: 80px; }
textarea {
  resize: vertical;
  min-height: 56px;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 27px,
      rgba(205,191,157,0.45) 27px,
      rgba(205,191,157,0.45) 28px
    ),
    rgba(255,253,247,0.55);
  line-height: 28px;
  padding-top: 4px;
}
input:focus, textarea:focus, select:focus {
  border-bottom-color: var(--carmine);
  background: rgba(255,253,247,0.9);
}
select {
  font-family: var(--serif-body);
  background-image: linear-gradient(45deg, transparent 50%, var(--sepia) 50%),
                    linear-gradient(-45deg, transparent 50%, var(--sepia) 50%);
  background-position: calc(100% - 12px) 50%, calc(100% - 6px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 24px;
}
::placeholder { color: rgba(107,79,51,0.45); font-style: italic; }

.composer-foot {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ------------------------ BUTTONS ------------------------ */

button {
  font: 500 14px/1 var(--serif-body);
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: 2px;
  transition: transform 0.1s ease, background 0.15s ease, color 0.15s ease;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.seal {
  background: var(--carmine);
  color: var(--paper);
  border: 0;
  padding: 10px 22px;
  font-family: var(--serif-display);
  font-style: italic;
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.05em;
  position: relative;
  box-shadow: 0 2px 0 rgba(110,15,5,0.6);
}
.seal:hover { background: #8c1c12; }
.seal-text { display: inline-block; }

.ghost {
  background: transparent;
  color: var(--sepia);
  border: 1px solid var(--rule);
  padding: 8px 14px;
}
.ghost:hover { color: var(--carmine); border-color: var(--carmine); background: rgba(163,36,24,0.04); }

.status {
  font: italic 14px/1 var(--serif-body);
  color: var(--ochre);
}

/* ------------------------ EMPTY STATES ------------------------ */

.empty-mark {
  text-align: center;
  font: italic 15px/1.55 var(--serif-body);
  color: var(--sepia);
  max-width: 380px;
  margin: 32px auto;
}
.curl {
  font: 16px var(--serif-display);
  color: var(--ochre);
  margin: 0 6px;
}

/* ------------------------ MANUSCRIPT (chat log) ------------------------ */

.manuscript {
  display: flex;
  flex-direction: column;
  gap: 26px;
  margin-bottom: 32px;
}

.turn {
  position: relative;
  padding: 24px 22px 22px;
  background: rgba(255,252,243,0.5);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  box-shadow: var(--shadow);
}

.turn::before {
  content: "";
  position: absolute;
  left: -3px; top: 18px; bottom: 18px;
  width: 3px;
  background: var(--ochre);
  opacity: 0.55;
  border-radius: 2px;
}

/* what the user wrote, presented as a quoted passage */
.you-block {
  border-left: 2px solid var(--rule);
  padding-left: 14px;
  margin-bottom: 18px;
}
.you-block .you-row { display: flex; gap: 10px; align-items: baseline; margin-bottom: 4px; }
.you-block .you-row:last-child { margin-bottom: 0; }
.you-block .you-tag {
  font: 500 10px/1 var(--serif-body);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  flex-shrink: 0;
  margin-top: 4px;
}
.you-block .you-text {
  font: 400 16px/1.5 var(--serif-body);
  color: var(--ink-soft);
  font-style: italic;
}

/* tutor ink marks */
.tutor-line {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 14px;
  align-items: baseline;
  margin: 14px 0;
}
.tutor-line .gloss {
  font: 500 10px/1.2 var(--serif-body);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  text-align: right;
  padding-top: 4px;
}
.tutor-line .body { font: 400 17px/1.45 var(--serif-body); }

.line-correction .body {
  color: var(--carmine);
  font-style: italic;
}
.line-correction .gloss { color: var(--carmine); }

.line-idiomatic .body {
  color: var(--forest);
  font-weight: 500;
  border-bottom: 2px solid var(--forest-soft);
  display: inline;
  padding-bottom: 1px;
}
.line-idiomatic .gloss { color: var(--forest); }

.line-explanation .body {
  font: italic 15px/1.5 var(--serif-body);
  color: var(--sepia);
}

.line-reply .body {
  background: var(--ochre-soft);
  padding: 10px 12px;
  border-radius: 2px;
  position: relative;
  font-size: 17px;
}
.line-reply .gloss { color: var(--ochre); }
.line-reply .body .reply-gloss {
  display: block;
  margin-top: 6px;
  font: italic 13px/1.4 var(--serif-body);
  color: var(--sepia);
}

/* phrase pills — saved-from-conversation */
.line-phrases .body {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.line-phrases .gloss { color: var(--ochre); }
.phrase-pill {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
  padding: 8px 12px;
  background: rgba(255,253,247,0.85);
  border: 1px dashed var(--rule);
  border-radius: 999px;
  font-size: 14px;
  transition: all 0.2s ease;
}
.phrase-pill .es {
  font: 600 italic 16px var(--serif-body);
  color: var(--ink);
}
.phrase-pill .en { color: var(--sepia); font-size: 13px; }
.phrase-pill button {
  font: 500 11px/1 var(--serif-body);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ochre);
  padding: 4px 10px;
  border-radius: 999px;
}
.phrase-pill button:hover { color: var(--carmine); border-color: var(--carmine); }
.phrase-pill.saved {
  background: var(--forest-soft);
  border-color: var(--forest);
  border-style: solid;
}
.phrase-pill.saved button {
  border-color: var(--forest);
  color: var(--forest);
  cursor: default;
}

/* on initial reveal, draw a tiny ink mark */
.turn { animation: turnIn 0.35s ease-out; }
@keyframes turnIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ------------------------ COMPOSER ------------------------ */

.composer {
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 27px,
      rgba(205,191,157,0.32) 27px,
      rgba(205,191,157,0.32) 28px
    ),
    rgba(255,253,247,0.45);
  padding: 22px;
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  box-shadow: var(--shadow);
  position: relative;
}
.composer::before {
  content: "";
  position: absolute;
  top: 12px; bottom: 12px; left: 12px;
  width: 1px;
  background: rgba(163,36,24,0.18);
}

/* ------------------------ PHRASES TAB ------------------------ */

.toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; }
#phrases-count { color: var(--sepia); }

.phrase-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 18px;
  padding: 18px 20px;
  background: rgba(255,253,247,0.6);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  cursor: default;
}
.phrase-row .es {
  font: 600 italic 19px var(--serif-display);
  color: var(--ink);
}
.phrase-row .en {
  font-size: 14px;
  color: var(--sepia);
  margin-top: 2px;
}
.phrase-row .stats {
  font: 500 11px/1.4 var(--serif-body);
  letter-spacing: 0.05em;
  color: var(--sepia);
  text-align: right;
  align-self: start;
  white-space: nowrap;
}
.phrase-row .stats .ok { color: var(--forest); }
.phrase-row .stats .mid { color: var(--ochre); }
.phrase-row .stats .bad { color: var(--carmine); }
.phrase-row .notes {
  grid-column: 1 / 3;
  font: italic 14px/1.4 var(--serif-body);
  color: var(--sepia);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--rule);
}
.phrase-row .actions {
  grid-column: 1 / 3;
  margin-top: 8px;
  display: flex;
  justify-content: flex-end;
}
.phrase-row .del {
  font: 500 11px/1 var(--serif-body);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: 0;
  color: var(--carmine);
  padding: 4px 8px;
  opacity: 0.7;
}
.phrase-row .del:hover { opacity: 1; text-decoration: line-through; }

/* ------------------------ TEST TAB ------------------------ */

.quiz-card {
  padding: 28px 24px;
  background: rgba(255,253,247,0.7);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  box-shadow: var(--shadow);
}
.quiz-card .progress {
  font: 500 11px/1 var(--serif-body);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  margin-bottom: 14px;
}
.quiz-card .prompt-en {
  font: 500 italic 22px/1.35 var(--serif-display);
  color: var(--ink);
  margin: 0 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--ochre);
}
.quiz-card textarea { min-height: 70px; }

.quiz-card .grade {
  margin-top: 18px;
  padding: 16px;
  border-radius: 2px;
  border-left-width: 3px;
  border-left-style: solid;
}
.grade.correct { background: var(--forest-soft); border-color: var(--forest); }
.grade.partial { background: var(--ochre-soft); border-color: var(--ochre); }
.grade.wrong   { background: var(--carmine-soft); border-color: var(--carmine); }
.grade .verdict {
  font: 700 italic 20px/1 var(--serif-display);
  margin-bottom: 6px;
}
.grade.correct .verdict { color: var(--forest); }
.grade.partial .verdict { color: var(--ochre); }
.grade.wrong   .verdict { color: var(--carmine); }
.grade .feedback { font-size: 15px; line-height: 1.5; }
.grade .model {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed currentColor;
  font-size: 14px;
  font-style: italic;
}
.grade .model b { font-style: normal; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; font-size: 11px; color: var(--sepia); display: block; margin-bottom: 4px; }

.quiz-summary {
  text-align: center;
  padding: 32px 22px;
}
.quiz-summary h3 { font: 700 italic 32px var(--serif-display); margin: 0 0 8px; color: var(--ink); }
.quiz-summary .tally { font: 500 18px var(--serif-body); color: var(--sepia); margin-bottom: 22px; }

/* ------------------------ SETTINGS ------------------------ */

.card-aside {
  padding: 18px 20px;
  background: rgba(255,253,247,0.5);
  border-left: 3px solid var(--ochre);
  border-radius: 0 2px 2px 0;
  margin-bottom: 18px;
}
.card-aside p { margin: 0 0 12px; }

#settings-status:not(:empty)::before { content: "✓ "; color: var(--forest); }

/* ------------------------ FOOTER ------------------------ */

footer {
  position: relative;
  z-index: 1;
  text-align: center;
  font: italic 13px/1 var(--serif-body);
  color: var(--sepia);
  padding: 30px 22px;
  letter-spacing: 0.04em;
}

/* ------------------------ MOBILE NUDGES ------------------------ */

@media (max-width: 540px) {
  main { padding: 20px 16px; }
  .masthead h1 { font-size: 32px; }
  .turn { padding: 20px 18px; }
  .composer { padding: 18px; }
  .tutor-line { grid-template-columns: 50px 1fr; gap: 10px; }
  .tutor-line .gloss { font-size: 9px; }
  .quiz-card { padding: 22px 18px; }
  .quiz-card .prompt-en { font-size: 19px; }
  nav { gap: 2px; }
  .page-link { font-size: 11px; padding: 6px 3px; }
  nav .dot { font-size: 11px; }
}