:root {
  --dp-deep: #103e37;
  --dp-green: #356e57;
  --dp-leaf: #6f9e72;
  --dp-mist: #edf5df;
  --dp-cream: #fff9e9;
  --dp-paper: #fffdf7;
  --dp-sun: #f8c63f;
  --dp-coral: #c9503f;
  --dp-ink: #193d38;
  --dp-muted: #62766d;
  --dp-line: #ded7c5;
}

.dp-page {
  margin: 0;
  color: var(--dp-ink);
  background:
    radial-gradient(circle at 12% 6%, rgba(248, 198, 63, .16), transparent 22rem),
    radial-gradient(circle at 91% 26%, rgba(111, 158, 114, .12), transparent 25rem),
    var(--dp-cream);
}

.dp-wrap {
  width: min(1320px, calc(100% - 40px));
  margin: 22px auto 68px;
}

/* ---------- header ---------- */
.dp-header {
  position: relative;
  overflow: hidden;
  min-height: 250px;
  margin-bottom: 24px;
  padding: 34px 42px 38px;
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, .04), transparent 36%),
    linear-gradient(135deg, #123f37, #1f5a4c 64%, #34725c);
  box-shadow: 0 24px 60px rgba(25, 79, 69, .2);
  color: #fffdf7;
}

.dp-header::before,
.dp-header::after {
  position: absolute;
  content: '';
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 22px;
  transform: rotate(10deg);
}

.dp-header::before { width: 218px; height: 142px; right: 85px; top: -52px; }
.dp-header::after { width: 154px; height: 98px; right: 28px; bottom: -52px; transform: rotate(-12deg); }
.dp-header-content { position: relative; z-index: 1; max-width: 820px; }
.dp-header .back-btn { display: inline-flex; margin-bottom: 22px; }
.dp-eyebrow { margin: 0; color: #ffe49a; font-size: .74rem; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.dp-header h1 { margin: 6px 0 10px; color: #fffdf7 !important; font-family: 'DM Serif Display', 'Noto Sans SC', serif; font-size: clamp(2.1rem, 4.5vw, 3.4rem); font-weight: 400; line-height: 1.04; }
.dp-header-content > p:not(.dp-eyebrow) { max-width: 740px; margin: 0; color: rgba(255,253,247,.88); font-size: 1.05rem; line-height: 1.6; }
.dp-hero-points { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.dp-hero-points span { padding: 7px 12px; border: 1px solid rgba(255,255,255,.26); border-radius: 999px; background: rgba(255,255,255,.08); color: #fffdf7; font-size: .8rem; font-weight: 900; }

/* ---------- builder layout ---------- */
.dp-layout { display: grid; grid-template-columns: minmax(0, .82fr) minmax(480px, 1.18fr); gap: 24px; align-items: start; }
.dp-builder { display: grid; gap: 18px; }

.dp-panel,
.dp-preview-panel {
  border: 1px solid rgba(213, 203, 181, .9);
  border-radius: 19px;
  background: rgba(255, 253, 248, .95);
  box-shadow: 0 12px 34px rgba(40, 76, 62, .09);
}

.dp-panel { padding: 24px; margin: 0; }
.dp-preview-panel { position: sticky; top: 18px; padding: 22px; }
.dp-panel-heading { margin-bottom: 15px; }
.dp-panel h2 { margin: 2px 0 0; color: var(--dp-deep); font-family: 'DM Serif Display', 'Noto Sans SC', serif; font-size: 1.45rem; font-weight: 400; line-height: 1.2; }
.dp-kicker { margin: 0; color: var(--dp-green); font-size: .72rem; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.dp-step { display: grid; float: left; place-items: center; width: 32px; height: 32px; margin: 2px 11px 8px 0; border-radius: 10px; background: var(--dp-mist); color: #295a49; font-size: .9rem; font-weight: 900; }

.dp-panel label { display: block; margin: 16px 0 8px; color: #2c4d43; font-size: .86rem; font-weight: 900; }
.dp-panel label:first-of-type { margin-top: 0; }
.dp-panel input[type="text"],
.dp-panel input[type="number"],
.dp-panel textarea {
  box-sizing: border-box;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cfd8ce;
  border-radius: 12px;
  background: #fff;
  color: var(--dp-ink);
  font: 700 1rem 'Nunito', 'Noto Sans SC', sans-serif;
}

.dp-panel textarea { min-height: 210px; resize: vertical; font-size: 1.05rem; line-height: 1.7; }
.dp-panel input:focus,
.dp-panel textarea:focus { border-color: #4c8672 !important; outline: 0; box-shadow: 0 0 0 4px rgba(76, 134, 114, .12); }
.dp-instructions { margin-bottom: 7px; padding: 13px 15px; border: 1px solid #e5ddc9; border-radius: 13px; background: #fbfaf4; }
.dp-instructions p { margin: 0 0 4px; color: var(--dp-muted); font-size: .84rem; line-height: 1.5; }
.dp-instructions p:last-child { margin-bottom: 0; }

/* ---------- settings ---------- */
.dp-mode-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dp-mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 14px 10px;
  border: 1px solid #d8dfd4;
  border-radius: 13px;
  background: #fbfcf6;
  color: var(--dp-ink);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}

@media (hover: hover) and (pointer: fine) {
  .dp-mode-card:hover { transform: translateY(-2px); }
}
.dp-mode-card.is-active { border-color: var(--dp-leaf); background: var(--dp-mist); box-shadow: inset 0 0 0 1px var(--dp-leaf); }
.dp-mode-icon { font-size: 1.45rem; }
.dp-mode-title { font-weight: 900; }
.dp-mode-sub { color: var(--dp-muted); font-size: .76rem; text-align: center; }
.dp-options { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.dp-check { display: flex !important; align-items: flex-start; gap: 10px; margin: 0 !important; color: var(--dp-ink) !important; cursor: pointer; }
.dp-check input { flex: 0 0 auto; width: 18px; height: 18px; margin-top: 3px; accent-color: var(--dp-green); }
.dp-check span { font-weight: 800; }
.dp-check span small { display: block; margin-top: 2px; color: var(--dp-muted); font-size: .78rem; font-weight: 500; }
.dp-columns-field { max-width: 130px; }

.dp-primary,
.dp-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  font-family: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, filter .15s;
}

.dp-primary { width: 100%; margin-top: 18px; padding: 13px 18px; background: var(--dp-coral); box-shadow: 0 5px 0 #9d392f; color: #fffdf7; font-size: .98rem; }
@media (hover: hover) and (pointer: fine) {
  .dp-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 7px 0 #9d392f; }
}
.dp-primary:active { transform: translateY(3px); box-shadow: 0 2px 0 #9d392f; }
.dp-secondary { width: auto; margin: 0; padding: 10px 15px; background: var(--dp-sun); box-shadow: 0 4px 0 #c89418; color: var(--dp-deep); font-size: .88rem; }
@media (hover: hover) and (pointer: fine) {
  .dp-secondary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 5px 0 #c89418; }
}
.dp-primary:disabled,
.dp-secondary:disabled { cursor: not-allowed; filter: grayscale(.65); opacity: .5; box-shadow: none; }

/* ---------- preview ---------- */
.dp-preview-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 14px; flex-wrap: wrap; }
.dp-count-box { display: flex; flex-direction: column; }
.dp-count-label { color: var(--dp-muted); font-size: .7rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
#dp-word-count { color: var(--dp-deep); font-family: 'DM Serif Display', serif; font-size: 1.8rem; line-height: 1; }
.dp-status { margin: 0 0 14px; color: var(--dp-muted); font-size: .84rem; }
.dp-empty-state { padding: 52px 20px; border: 2px dashed #ddd4c0; border-radius: 16px; background: #fbfaf4; color: var(--dp-muted); text-align: center; }
.dp-empty-icon { font-size: 2.4rem; }
.dp-empty-state h2 { margin: 8px 0 4px; color: var(--dp-deep); font-family: 'DM Serif Display', 'Noto Sans SC', serif; font-weight: 400; }
.dp-empty-state p { margin: 0; }

/* ---------- printable worksheet ---------- */
.dp-worksheet {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid #d8dfd4;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(28, 65, 53, .08);
  color: #1c322b;
}

.dp-worksheet::before { position: absolute; top: 0; left: 0; width: 100%; height: 7px; content: ''; background: linear-gradient(90deg, var(--dp-sun) 0 26%, var(--dp-green) 26% 78%, var(--dp-coral) 78%); }
.dp-sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 2px 0 22px; }
.dp-sheet-title-block { display: flex; align-items: center; min-width: 0; gap: 12px; }
.dp-sheet-mark { display: grid; flex: 0 0 auto; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--dp-deep); box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .15); color: #fff; font: 900 1.45rem 'Noto Sans SC', sans-serif; }
.dp-sheet-kicker { margin: 0 0 2px; color: var(--dp-green); font-size: .57rem; font-weight: 900; letter-spacing: .11em; }
.dp-sheet-head h3 { margin: 0; color: var(--dp-deep); font: 900 1.48rem/1.1 'Noto Sans SC', sans-serif; }
.dp-student-meta { flex: 0 0 auto; min-width: 208px; padding: 9px 11px; border: 1px solid #e4ddcd; border-radius: 11px; background: #fbfaf4; }
.dp-meta-field { display: flex; align-items: flex-end; gap: 8px; color: #486158; font-size: .72rem; }
.dp-meta-field + .dp-meta-field { margin-top: 7px; }
.dp-meta-field b { flex: 0 0 auto; font-weight: 800; }
.dp-blank { flex: 1; min-width: 82px; height: 17px; border-bottom: 1px solid #899b92; }
.dp-blank--date { min-width: 60px; }

.dp-sheet-section { border: 1px solid #e0e5da; border-radius: 15px; }
.dp-grid-section { padding: 16px 16px 18px; background: #f8fbf3; }
.dp-question-section { margin-top: 16px; padding: 16px; background: #fffdfa; }
.dp-section-heading { display: flex; align-items: center; gap: 10px; margin-bottom: 13px; }
.dp-section-number { display: grid; flex: 0 0 auto; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--dp-sun); color: var(--dp-deep); font-size: .7rem; font-weight: 900; }
.dp-section-kicker { margin: 0; color: var(--dp-green); font-size: .57rem; font-weight: 900; letter-spacing: .12em; }
.dp-section-heading h4 { margin: 0; color: var(--dp-deep); font: 800 .88rem 'Noto Sans SC', sans-serif; }

/* code table */
.dp-grid-host { overflow-x: auto; }
table.dp-grid { margin: 0 auto; border-collapse: separate; border-spacing: 3px; }
table.dp-grid th,
table.dp-grid td { width: 46px; height: 46px; border: 1px solid #cbd8ce; border-radius: 7px; text-align: center; vertical-align: middle; }
table.dp-grid .dp-axis { border-color: var(--dp-deep); background: var(--dp-deep); color: #fff; font-size: .82rem; font-weight: 900; }
table.dp-grid .dp-corner { border-color: transparent; background: transparent; }
table.dp-grid .dp-cell { background: #fff; color: #173a31; font: 700 1.38rem 'Noto Sans SC', sans-serif; }

/* questions */
.dp-question-heading { margin-bottom: 12px; }
.dp-questions-prompt { margin: 0; color: var(--dp-deep); font: 800 .88rem 'Noto Sans SC', sans-serif; }
.dp-questions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px 12px; margin: 0; padding: 0; list-style: none; }
.dp-question { display: flex; align-items: center; min-width: 0; min-height: 52px; gap: 8px; padding: 8px 9px; border: 1px solid #e6e1d4; border-left: 4px solid #b7cfae; border-radius: 10px; background: #fff; }
.dp-question--sentence { grid-column: 1 / -1; border-left-color: var(--dp-sun); background: #fffdf5; }
.dp-q-num { display: grid; flex: 0 0 auto; place-items: center; width: 24px; height: 24px; border-radius: 8px; background: var(--dp-mist); color: var(--dp-green); font-size: .76rem; font-weight: 900; }
.dp-codes { display: inline-flex; flex: 0 1 auto; flex-wrap: wrap; gap: 4px; }
.dp-code { display: inline-block; padding: 2px 6px; border: 1px solid #9cb0a1; border-radius: 5px; background: #f7faef; color: #294d40; font-size: .78rem; font-weight: 900; letter-spacing: .01em; }
.dp-answer-line { display: flex; flex: 1 1 58px; align-items: flex-end; min-width: 58px; height: 27px; border-bottom: 1.5px solid #53645d; }
.dp-answer-text { padding-bottom: 1px; color: #b23b3b; font: 700 1.1rem 'Noto Sans SC', sans-serif; visibility: hidden; }
.dp-question--sentence .dp-answer-line { min-width: 130px; }
.dp-show-answers .dp-question--sentence { flex-wrap: wrap; }
.dp-show-answers .dp-question--sentence .dp-answer-line { flex-basis: calc(100% - 32px); margin-left: 32px; }
.dp-show-answers .dp-question--sentence .dp-answer-text { white-space: normal; }

/* encode mode */
.dp-question--encode { align-items: flex-start; }
.dp-encode-word { display: inline-flex; flex-wrap: wrap; gap: 8px; }
.dp-encode-char { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.dp-char { color: #1c322b; font: 700 1.35rem 'Noto Sans SC', sans-serif; }
.dp-code-blank { display: grid; place-items: center; width: 40px; height: 25px; border: 1px solid #566760; border-radius: 5px; }
.dp-worksheet.dp-show-answers .dp-answer-text { visibility: visible; }
.dp-answer-key .dp-section-number { background: var(--dp-coral); color: #fff; }
.dp-answer-key .dp-question { border-left-color: #e3a49b; }

.dp-sheet-footer { display: flex; justify-content: space-between; gap: 12px; margin-top: 16px; padding-top: 9px; border-top: 1px solid #e2ded3; color: #75877f; font-size: .62rem; font-weight: 800; letter-spacing: .03em; }
.dp-print-root { display: none; }

/* ---------- responsive ---------- */
@media (max-width: 1040px) {
  .dp-layout { grid-template-columns: 1fr; }
  .dp-preview-panel { position: static; width: min(760px, 100%); margin: 0 auto; }
}

@media (max-width: 700px) {
  .dp-wrap { width: min(100% - 20px, 1320px); margin-top: 10px; }
  .dp-header { min-height: 0; padding: 25px 22px 29px; border-radius: 17px; }
  .dp-header h1 { font-size: 2rem; }
  .dp-header-content > p:not(.dp-eyebrow) { font-size: .92rem; }
  .dp-panel,
  .dp-preview-panel { padding: 18px; border-radius: 15px; }
  .dp-worksheet { padding: 20px 14px; }
  .dp-sheet-head { align-items: stretch; flex-direction: column; }
  .dp-student-meta { width: 100%; }
  .dp-questions { grid-template-columns: 1fr; }
  .dp-question--sentence { grid-column: auto; }
  table.dp-grid th,
  table.dp-grid td { width: 40px; height: 40px; }
}

/* ---------- print / Save as PDF ---------- */
@media print {
  @page { size: letter portrait; margin: 10mm; }

  html,
  body.dp-page { width: auto; min-height: 0; margin: 0; padding: 0 !important; background: #fff !important; }
  body > *:not(.dp-print-root) { display: none !important; }
  .dp-print-root { display: block !important; }

  .dp-print-page {
    display: flex !important;
    flex-direction: column;
    width: 100%;
    min-height: 245mm;
    margin: 0;
    padding: 0;
    overflow: visible;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    break-after: page;
    color: #1c322b;
  }

  .dp-print-page:last-child { break-after: auto; }
  .dp-print-page::before { height: 5px; }
  .dp-sheet-head { margin: 4px 0 14px; }
  .dp-sheet-mark { width: 43px; height: 43px; border-radius: 11px; font-size: 1.25rem; }
  .dp-sheet-head h3 { font-size: 1.28rem; }
  .dp-student-meta { min-width: 200px; padding: 7px 9px; }
  .dp-meta-field { font-size: .66rem; }
  .dp-grid-section { padding: 11px 13px 13px; }
  .dp-question-section { margin-top: 11px; padding: 11px 13px; }
  .dp-section-heading { margin-bottom: 8px; }
  .dp-section-number { width: 27px; height: 27px; border-radius: 8px; font-size: .64rem; }
  .dp-section-heading h4,
  .dp-questions-prompt { font-size: .78rem; }

  table.dp-grid { border-spacing: 2px; }
  table.dp-grid th,
  table.dp-grid td { width: 43px; height: 43px; border-radius: 6px; }
  table.dp-grid .dp-cell { font-size: 1.22rem; }
  table.dp-grid .dp-axis { font-size: .75rem; }

  /* Keep vocabulary compact on paper, even when the screen's mobile media
     query is active. Sentence items opt back into a full-width row. */
  .dp-questions { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 10px; break-inside: auto; }
  .dp-question { min-height: 45px; padding: 6px 7px; border-radius: 8px; break-inside: avoid; }
  .dp-question--sentence { grid-column: 1 / -1; }
  .dp-q-num { width: 21px; height: 21px; border-radius: 7px; font-size: .68rem; }
  .dp-code { padding: 1px 5px; font-size: .7rem; }
  .dp-answer-line { height: 23px; }
  .dp-answer-text { font-size: .96rem; }
  .dp-show-answers .dp-question--sentence .dp-answer-line { min-height: 22px; }
  .dp-char { font-size: 1.15rem; }
  .dp-code-blank { width: 36px; height: 22px; }
  .dp-grid-section,
  .dp-grid-host { break-inside: avoid; }
  .dp-sheet-footer { margin-top: auto; padding-top: 7px; }

  .dp-print-page,
  .dp-print-page * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}