@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&family=Noto+Sans+Telugu:wght@500;700&display=swap');

:root {
  --c-primary: #0f8f6d;
  --c-primary-dark: #0a6b52;
  --c-accent: #ffb454;
  --c-ink: #1f2a37;
  --c-ink-muted: #5b6678;
  --c-bg: #f7f4ee;
  --c-surface: #ffffff;
  --c-surface-soft: #fefcf7;
  --c-border: #d8dfeb;
  --c-danger: #d64545;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow-soft: 0 8px 24px rgba(20, 33, 61, 0.08);
  --shadow-card: 0 22px 40px rgba(9, 21, 43, 0.12);
  --font-ui: 'Space Grotesk', 'Noto Sans Telugu', sans-serif;
  --font-telugu: 'Noto Sans Telugu', sans-serif;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font-ui);
  color: var(--c-ink);
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% 8%, #ffe1b8 0%, rgba(255, 225, 184, 0) 38%),
    radial-gradient(circle at 96% 10%, #cde9ff 0%, rgba(205, 233, 255, 0) 32%),
    linear-gradient(160deg, #f8f4ec 0%, #f4f7ff 100%);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 0.9rem 1rem;
  background: rgba(19, 36, 61, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.app-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 0.95;
  letter-spacing: 0.4px;
  cursor: default;
}

.logo-line {
  color: #ffffff;
  font-family: var(--font-telugu);
  font-weight: 700;
  font-size: 1.06rem;
}

nav {
  display: inline-flex;
  gap: 0.45rem;
}

.nav-btn {
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
  color: #f5f8ff;
  border-radius: 99px;
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 700;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.nav-btn:hover,
.nav-btn.active {
  background: rgba(255, 255, 255, 0.24);
  border-color: #ffffff;
  transform: translateY(-1px);
}

.nav-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

#progress-bar-wrap {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.95);
}

#progress-bar-wrap.hidden { display: none; }

#progress-bar {
  flex: 1;
  height: 12px;
  background: #e5ebf3;
  border-radius: 999px;
  overflow: hidden;
}

#progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #1da37e 0%, #42c59e 100%);
  border-radius: 999px;
  transition: width 0.35s ease;
}

#progress-label {
  min-width: 3.2rem;
  text-align: right;
  font-size: 0.8rem;
  color: var(--c-ink-muted);
  letter-spacing: 0.4px;
}

#app-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.4rem 1rem 2.5rem;
}

.landing-card,
.summary-card,
.survey-host {
  border: 1px solid rgba(31, 42, 55, 0.08);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-surface-soft) 100%);
  box-shadow: var(--shadow-card);
}

.landing-card {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.7rem 1.8rem;
  text-align: center;
}

.landing-kicker {
  color: var(--c-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

#landing-heading {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.12;
  margin-bottom: 0.9rem;
}

.landing-subheading {
  max-width: 58ch;
  margin: 0 auto 1.8rem;
  color: var(--c-ink-muted);
  line-height: 1.65;
}

.landing-cta {
  max-width: 360px;
  margin: 0 auto;
}

/* ── Landing instructions ─────────────────────────────────────────────────── */

.landing-instructions {
  margin-top: 2.4rem;
  text-align: left;
}

.instructions-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ink-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 1rem;
}

.instructions-columns-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.2rem;
  padding: 0 0 0.4rem;
  border-bottom: 2px solid var(--c-border);
  margin-bottom: 0.2rem;
}

.instructions-col-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  padding: 0 0.2rem;
}

.instructions-col-label--te {
  font-family: var(--font-telugu);
}

.instructions-list {
  display: flex;
  flex-direction: column;
}

.instructions-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.2rem;
  padding: 0.75rem 0.2rem;
  border-bottom: 1px solid var(--c-border);
}

.instructions-row:last-child {
  border-bottom: none;
}

.instructions-cell {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--c-ink);
}

.instructions-cell--te {
  font-family: var(--font-telugu);
  color: var(--c-ink-muted);
}

/* ── Landing feedback ──────────────────────────────────────────────────────── */

.landing-feedback {
  margin-top: 1.8rem;
  text-align: center;
}

.landing-feedback-btn {
  display: inline-block;
  text-decoration: none;
}

@media (max-width: 560px) {
  .instructions-columns-header {
    display: none;
  }

  .instructions-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .instructions-cell--te {
    padding-left: 0.8rem;
    border-left: 3px solid var(--c-border);
    font-size: 0.84rem;
  }
}

.survey-host {
  padding: 1rem;
}

.survey-host .sd-root-modern {
  --sjs-primary-backcolor: var(--c-primary);
  --sjs-primary-backcolor-dark: var(--c-primary-dark);
  --sjs-primary-forecolor: #ffffff;
  --sjs-general-backcolor: transparent;
  --sjs-general-forecolor: var(--c-ink);
  --sjs-question-background: #ffffff;
  --sjs-border-light: #dfe7f2;
  --sjs-base-unit: 9px;
}

.survey-host .sd-container-modern {
  max-width: none;
}

.survey-host .sd-body__page {
  border: 1px solid #e2e8f2;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  padding: 1rem;
}

.survey-host .sd-title,
.survey-host .sd-question__title {
  font-weight: 700;
  color: #1e293b;
}

.survey-host .sd-question__title {
  font-size: 1.06rem;
  line-height: 1.45;
  margin-bottom: 0.75rem;
}

.survey-host .sd-input {
  border: 1px solid #ccd8ea;
  border-radius: 10px;
  min-height: 46px;
  font-size: 0.98rem;
}

.survey-host .sd-dropdown,
.survey-host .sd-selectbase {
  border-radius: 10px;
}

.survey-host .sd-item__decorator {
  border-width: 2px;
}

.survey-host .sd-item.sd-item--checked {
  background: #ebf9f3;
  border-radius: 10px;
}

.survey-host .sd-selectbase__item,
.survey-host .sd-item {
  border-radius: 12px;
}

.survey-host .sd-navigation {
  justify-content: flex-end;
  text-align: right;
  padding-top: 1rem;
}

.survey-host .sd-body__navigation {
  display: flex;
  justify-content: flex-end;
}

.survey-host .sd-body__navigation .sd-btn {
  min-width: 150px;
  min-height: 40px;
  padding: 0.5rem 1.0rem;
  font-size: 0.98rem;
  letter-spacing: 0.2px;
  margin-left: auto;
}

.survey-host .sd-btn {
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 10px 18px rgba(15, 143, 109, 0.16);
}

.inline-audio-btn {
  border: 1px solid #0a6b52;
  color: #0a6b52;
  background: #e6f6f0;
  border-radius: 999px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.65rem;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition);
}

.inline-audio-btn:hover {
  transform: translateY(-1px);
}

.inline-audio-btn.playing {
  background: #0a6b52;
  color: #fff;
}

.match-prompt,
.fill-hint {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  border: 1px dashed #c7d6ea;
  background: #fbfdff;
}

.choice-translit {
  font-weight: 700;
  font-style: italic;
}

.choice-script {
  color: var(--c-ink-muted);
  font-size: 0.93rem;
}

.choice-script[data-language="telugu"],
.fill-question-line[data-language="telugu"] {
  font-family: var(--font-telugu);
}

.choice-option {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.mcq-option-layout {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  width: 100%;
}

.choice-copy {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.08rem;
}

.choice-copy--prompt {
  width: 100%;
}

.sentence-support {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  border: 1px dashed #c7d6ea;
  background: #fbfdff;
}

.fill-script {
  display: inline-block;
  margin-top: 0.25rem;
}

.question-helper {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--c-ink-muted);
  text-align: center;
}

.question-helper-left {
  text-align: left;
}

.required-mark {
  color: #b83030;
  font-weight: 700;
}

.fill-prompt-block {
  display: grid;
  gap: 1rem;
  justify-items: center;
  margin-bottom: 0.35rem;
  width: 100%;
}

.fill-question-line {
  font-size: 1.25rem;
  line-height: 2;
  text-align: center;
  font-weight: 700;
  color: #182534;
}

.survey-host .sd-question[data-name$="_reference"] .sd-question__content,
.survey-host .sd-question[data-name$="_prompt"] .sd-question__content,
.survey-host .sd-question[data-name$="_intro"] .sd-question__content {
  display: flex;
  justify-content: center;
}

.audio-row {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  margin-top: 0.45rem;
}

.audio-list strong {
  display: block;
  margin-bottom: 0.25rem;
}

.fill-ref {
  line-height: 1.45;
  text-align: center;
}

.fill-ref-label {
  display: block;
  margin-bottom: 0.15rem;
}

.fill-ref-content {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.fill-ref-content em {
  font-style: italic;
}

.survey-host .sd-question[data-name$="_reference"] {
  margin-top: 0.75rem;
}

.survey-host .sd-question input.sd-input {
  text-align: center;
}

.survey-host .sd-question input.sd-input::placeholder {
  text-align: center;
}

.match-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0.35rem;
}

.match-column {
  border: 1px solid #dde8f7;
  border-radius: 12px;
  background: #f9fcff;
  padding: 0.75rem;
}

.match-column h4 {
  font-size: 0.86rem;
  letter-spacing: 0.35px;
  margin-bottom: 0.55rem;
  color: #456;
  text-transform: uppercase;
}

.match-card-list {
  display: grid;
  gap: 0.55rem;
}

.match-prompt-card,
.match-option-card {
  width: 100%;
  border: 1px solid #c9dbf3;
  border-radius: 12px;
  background: #fff;
  color: #203044;
  text-align: left;
  cursor: pointer;
  padding: 0.6rem 0.7rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.match-prompt-card {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.match-option-card {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.match-card-copy {
  display: flex;
  flex-direction: column;
  gap: 0.16rem;
  min-width: 0;
}

.match-card-copy--audio-only {
  justify-content: center;
}

.match-card-copy .choice-script {
  display: block;
}

.prompt-audio-only-label {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #607086;
  text-transform: uppercase;
}

.match-assigned {
  display: block;
}

.match-prompt-card:hover,
.match-option-card:hover {
  transform: translateY(-1px);
  border-color: #97b8e3;
  box-shadow: 0 8px 14px rgba(44, 88, 148, 0.13);
}

.match-prompt-card.selected {
  border-color: #0f8f6d;
  box-shadow: 0 0 0 2px rgba(15, 143, 109, 0.2);
}

.match-prompt-card.matched {
  border-color: #4ea98d;
  background: #eefaf5;
}

.match-option-card.used {
  border-color: #b8c3d5;
  background: #f1f4f9;
  color: #556277;
}

.match-assigned {
  font-size: 0.78rem;
  color: #5f728f;
  margin-top: 0.2rem;
}

@media (max-width: 760px) {
  .match-board {
    grid-template-columns: 1fr;
  }
}

.view {
  animation: fadeIn 0.24s ease;
}

.view.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}

#view-loading,
#view-error {
  text-align: center;
  padding: 4rem 1rem;
}

#view-loading {
  color: var(--c-ink-muted);
}

.spinner {
  width: 42px;
  height: 42px;
  margin: 0 auto 1.2rem;
  border: 4px solid #dde6f3;
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#error-msg {
  color: var(--c-ink-muted);
  margin-bottom: 1.2rem;
  line-height: 1.6;
}

.btn-primary,
.btn-secondary {
  display: block;
  width: 100%;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  padding: 0.9rem 1rem;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.btn-primary {
  background: linear-gradient(90deg, #0f8f6d 0%, #2bb28b 100%);
  border-color: #1f9f7b;
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  background: #ffffff;
  border-color: #d5dfec;
  color: var(--c-ink);
}

.btn-secondary:hover {
  background: #f8fbff;
  border-color: #b8c9df;
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 3px solid rgba(16, 143, 109, 0.35);
  outline-offset: 2px;
}

.summary-card {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 2.4rem 1.5rem;
}

.summary-card h2 {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  margin-bottom: 0.65rem;
}

.score-text {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  font-weight: 700;
  color: var(--c-primary-dark);
  margin-bottom: 0.45rem;
}

.meta-text {
  color: var(--c-ink-muted);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.results-review {
  margin-top: 1rem;
  text-align: left;
}

.results-review h3 {
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

.result-list {
  list-style: none;
  display: grid;
  gap: 0.6rem;
}

.result-row {
  background: #ffffff;
  border: 1px solid #deebf8;
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
}

.result-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.result-pill {
  display: inline-flex;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.result-pill.correct {
  background: #e8f8f1;
  color: #0d7a5b;
}

.result-pill.wrong {
  background: #fdecec;
  color: #b83030;
}

.result-q {
  font-size: 0.9rem;
  font-weight: 700;
  color: #1f2a37;
}

.result-detail {
  font-size: 0.86rem;
  color: #4a5870;
  line-height: 1.45;
}

.match-result-list {
  list-style: none;
  margin-top: 0.3rem;
  display: grid;
  gap: 0.2rem;
}

.match-result-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 0.35rem;
  align-items: baseline;
}

.match-result-left,
.match-result-right {
  overflow-wrap: anywhere;
}

.match-result-arrow {
  color: #6b7f99;
}

.summary-card .btn-primary {
  margin-bottom: 0.75rem;
}

#view-archive h2 {
  font-size: 1.5rem;
  margin-bottom: 0.9rem;
}

.archive-list {
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.archive-link {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid #d7e0ee;
  border-radius: 12px;
  background: #ffffff;
  padding: 0.9rem 1rem;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.archive-link:hover {
  transform: translateY(-1px);
  border-color: #9eb7d7;
  box-shadow: 0 8px 16px rgba(30, 57, 94, 0.12);
}

.archive-date {
  font-weight: 700;
}

.archive-meta {
  color: var(--c-ink-muted);
  font-size: 0.86rem;
}

.archive-empty {
  color: var(--c-ink-muted);
  font-style: italic;
  padding: 0.8rem 0;
}

@media (min-width: 900px) {
  #app-main {
    padding-top: 2rem;
  }

  .survey-host {
    padding: 1.35rem;
  }

  .survey-host .sd-body__page {
    padding: 1.2rem 1.3rem;
  }

  .landing-card {
    padding: 3rem 2.4rem;
  }
}

@media (max-width: 520px) {
  .app-header {
    flex-wrap: wrap;
    justify-content: center;
  }

  nav {
    width: 100%;
    justify-content: center;
  }

  .nav-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.72rem;
  }

  #app-main {
    padding: 1rem 0.7rem 2rem;
  }

  .landing-card,
  .summary-card,
  .survey-host {
    border-radius: 12px;
  }

  .survey-host {
    padding: 0.7rem;
  }

  .survey-host .sd-body__page {
    padding: 0.85rem;
  }
}