:root {
  --bg: #f5f0e6;
  --surface: #fffdf8;
  --surface-strong: #f8f3ea;
  --text: #16352a;
  --muted: #5d6f63;
  --brand: #006241;
  --brand-strong: #0d4b37;
  --brand-soft: #d7e6dc;
  --accent: #c79b5b;
  --border: rgba(13, 75, 55, 0.12);
  --danger: #9b3326;
  --shadow: 0 18px 45px rgba(17, 45, 33, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(215, 230, 220, 0.75), transparent 30%),
    linear-gradient(180deg, #f7f3ea 0%, #efe6d8 100%);
  color: var(--text);
}

body {
  padding: 0;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  width: min(100%, 34rem);
  margin: 0 auto;
  min-height: 100vh;
  padding: max(1rem, env(safe-area-inset-top)) 1rem max(1.25rem, env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-logo {
  width: 4.75rem;
  height: 4.75rem;
  object-fit: contain;
  filter: drop-shadow(0 8px 14px rgba(0, 98, 65, 0.14));
}

.topbar h1,
.hero-card h2,
.question-text {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
}

.eyebrow,
.hero-kicker,
.section-label {
  margin: 0 0 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--muted);
}

.app,
.screen {
  display: grid;
  gap: 1rem;
}

.hero-card,
.stack-card,
.status-card,
.question-card {
  background: rgba(255, 253, 248, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.25rem;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.8), rgba(251, 245, 235, 0.96)),
    linear-gradient(120deg, rgba(0, 98, 65, 0.08), transparent);
}

.hero-card-compact {
  padding-bottom: 1rem;
}

.hero-copy {
  margin: 0.65rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.stack-card,
.status-card,
.question-card {
  padding: 1rem;
}

#loginForm {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field span {
  font-size: 0.95rem;
  font-weight: 600;
}

.field input[type="text"],
.field textarea {
  width: 100%;
  border: 1px solid rgba(13, 75, 55, 0.15);
  border-radius: var(--radius-md);
  background: #fffdf9;
  padding: 0.95rem 1rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input[type="text"]:focus,
.field textarea:focus,
.field input[type="file"]:focus {
  border-color: rgba(0, 98, 65, 0.45);
  box-shadow: 0 0 0 4px rgba(0, 98, 65, 0.08);
}

.field input[type="file"] {
  width: 100%;
  padding: 0.9rem 0;
}

.frequency-group {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.frequency-group legend {
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0;
}

.segmented-control,
.answer-toggle {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  align-items: stretch;
}

.answer-toggle {
  grid-template-columns: repeat(2, 1fr);
}

.segmented-control label,
.answer-button {
  position: relative;
  display: block;
}

.segmented-control input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.segmented-control span,
.answer-button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  border-radius: 999px;
  border: 1px solid rgba(13, 75, 55, 0.14);
  background: var(--surface);
  color: var(--brand-strong);
  font-weight: 700;
  padding: 0.4rem 0.75rem;
  text-align: center;
}

.segmented-control input:checked + span,
.answer-button.is-selected {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.answer-button.is-no {
  background: #f7ece8;
  border-color: rgba(155, 51, 38, 0.22);
  color: var(--danger);
}

.primary-button,
.secondary-button,
.ghost-button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  min-height: 3.15rem;
  padding: 0.9rem 1.15rem;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    opacity 0.18s ease,
    background 0.18s ease,
    color 0.18s ease;
}

.primary-button {
  background: linear-gradient(180deg, #00754a, #00563b);
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 98, 65, 0.22);
}

#loginForm .primary-button {
  width: 100%;
  margin-top: 0.15rem;
}

.secondary-button {
  background: #e6efe9;
  color: var(--brand-strong);
}

.ghost-button {
  background: transparent;
  color: var(--brand-strong);
  border: 1px solid rgba(13, 75, 55, 0.14);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.quick-tool-button:hover,
.answer-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled,
.ghost-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
  transform: none;
}

.preview-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.preview-list li {
  padding: 0.95rem 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  border: 1px solid rgba(13, 75, 55, 0.08);
}

.status-row,
.progress-row,
.nav-actions,
.stack-actions {
  display: grid;
  gap: 0.75rem;
}

.status-row {
  grid-template-columns: repeat(3, 1fr);
}

.status-row strong,
.progress-copy strong {
  display: block;
  font-size: 0.98rem;
}

.progress-row {
  align-items: end;
  grid-template-columns: 1fr auto;
  margin-top: 1rem;
}

.progress-pill {
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-weight: 700;
}

.progress-track {
  margin-top: 0.85rem;
  height: 0.65rem;
  background: rgba(0, 98, 65, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #00754a 0%, #c79b5b 100%);
  border-radius: inherit;
  transition: width 0.25s ease;
}

.section-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.45rem, 3vw, 1rem);
  width: min(100%, 24rem);
  margin: 0.1rem auto 0;
  padding: 0.15rem 0 0.35rem;
  align-items: center;
  justify-items: center;
}

.section-tab {
  appearance: none;
  border-radius: 999px;
  width: clamp(3.2rem, 15vw, 4rem);
  height: clamp(3.2rem, 15vw, 4rem);
  padding: 0;
  background: rgba(255, 253, 248, 0.94);
  border: 1px solid rgba(13, 75, 55, 0.1);
  color: rgba(22, 53, 42, 0.7);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 22px rgba(19, 53, 41, 0.08);
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.section-tab.is-active {
  background: var(--brand-strong);
  border-color: var(--brand-strong);
  color: #fff;
  box-shadow: 0 16px 30px rgba(13, 75, 55, 0.24);
  transform: translateY(-2px);
}

.section-tab:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 18px 30px rgba(13, 75, 55, 0.16);
}

.section-tab-icon {
  width: 68%;
  height: 68%;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  background: rgba(0, 98, 65, 0.09);
  color: currentColor;
  transition:
    transform 0.18s ease,
    background 0.18s ease;
}

.section-tab.is-active .section-tab-icon {
  background: rgba(255, 255, 255, 0.16);
}

.section-tab:hover .section-tab-icon {
  transform: scale(1.08);
}

.section-tab-icon svg {
  width: 58%;
  height: 58%;
  display: block;
  fill: currentColor;
}

.section-tab:focus-visible {
  outline: 3px solid rgba(0, 117, 74, 0.28);
  outline-offset: 4px;
}

.question-card {
  display: grid;
  gap: 1rem;
}

.answer-requirement {
  margin: -0.35rem 0 0;
  color: var(--danger);
  font-size: 0.92rem;
  font-weight: 600;
}

.quick-tools {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.quick-tool-button {
  appearance: none;
  border: 1px solid rgba(13, 75, 55, 0.12);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  color: var(--brand-strong);
  padding: 0.8rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-weight: 700;
  cursor: pointer;
}

.quick-tool-button.is-active {
  background: rgba(0, 98, 65, 0.09);
  border-color: rgba(0, 98, 65, 0.24);
}

.quick-tool-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(0, 98, 65, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.quick-tool-icon svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.collapsible-panel {
  display: grid;
  gap: 0.75rem;
}

.collapsible-panel[hidden] {
  display: none;
}

.section-heading {
  margin: 0;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.section-subtitle {
  margin: -0.45rem 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.question-text {
  font-size: 1.45rem;
  line-height: 1.25;
}

.photo-preview {
  display: grid;
  gap: 0.75rem;
  padding: 0.8rem;
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
}

.photo-preview img {
  width: 100%;
  max-height: 18rem;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.nav-actions,
.stack-actions {
  grid-template-columns: repeat(2, 1fr);
}

.summary-grid {
  gap: 0.85rem;
}

.summary-card {
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
  border: 1px solid rgba(13, 75, 55, 0.08);
}

.summary-card h3,
.summary-card p {
  margin: 0;
}

.summary-card p {
  margin-top: 0.45rem;
  color: var(--muted);
}

@media (min-width: 900px) {
  .app-shell {
    width: min(100%, 78rem);
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .topbar {
    align-items: center;
    margin-bottom: 1.4rem;
  }

  .screen-login {
    grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
    align-items: start;
  }

  .screen-login .hero-card {
    min-height: 100%;
  }

  .screen-login .stack-card:last-child {
    grid-column: 1 / -1;
  }

  .preview-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .screen-walk {
    grid-template-columns: minmax(6rem, 7rem) minmax(0, 1fr);
    grid-template-areas:
      "status status"
      "sections question"
      "sections nav";
    align-items: start;
    column-gap: 1.25rem;
  }

  .status-card {
    grid-area: status;
    padding: 1.2rem 1.25rem;
  }

  .section-tabs {
    grid-area: sections;
    grid-template-columns: 1fr;
    width: 100%;
    margin: 0;
    padding: 0.2rem 0;
    gap: 0.9rem;
    position: sticky;
    top: 1rem;
  }

  .section-tab {
    width: 4.6rem;
    height: 4.6rem;
  }

  .question-card {
    grid-area: question;
    padding: 1.35rem;
    gap: 1.15rem;
  }

  .question-text {
    font-size: 2.1rem;
    line-height: 1.18;
    max-width: 52rem;
  }

  .section-subtitle {
    max-width: 52rem;
    font-size: 1.12rem;
  }

  .answer-toggle,
  .quick-tools,
  .nav-actions {
    max-width: 44rem;
  }

  .nav-actions {
    grid-area: nav;
  }

  .screen-complete {
    grid-template-columns: minmax(0, 1fr) minmax(22rem, 0.95fr);
    align-items: start;
  }

  .screen-complete .hero-card {
    grid-column: 1 / -1;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .brand-lockup {
    align-items: flex-start;
  }

  .brand-logo {
    width: 3.8rem;
    height: 3.8rem;
  }

  .status-row {
    grid-template-columns: 1fr;
  }

  .quick-tools,
  .nav-actions,
  .stack-actions {
    grid-template-columns: 1fr;
  }

  .section-tab:hover,
  .primary-button:hover,
  .secondary-button:hover,
  .ghost-button:hover,
  .quick-tool-button:hover,
  .answer-button:hover {
    transform: none;
  }
}