/* Product polish, loaded last on every page.

   The structure and the Material components live in app.css, staff.css and
   m3-components.css. This file is the layer that makes the portal feel like a
   finished product rather than a set of forms: a calmer header, depth and
   motion on cards, a real landing page, a student home that shows progress at a
   glance, and richer dashboard tiles.

   Same rules as the rest: colours are Material roles only (--md-sys-color-*),
   combined with color-mix for tints; no raw hex, no inline styles, no
   third-party fonts or scripts. Motion is switched off for anyone who asks for
   reduced motion. */

:root {
  --polish-lift: 0 2px 6px rgb(0 0 0 / 0.08), 0 8px 24px rgb(0 0 0 / 0.08);
  --polish-soft: 0 1px 2px rgb(0 0 0 / 0.06), 0 2px 8px rgb(0 0 0 / 0.05);
  --polish-glow: color-mix(in srgb, var(--md-sys-color-primary) 14%, transparent);
  --polish-warm: color-mix(in srgb, var(--md-sys-color-tertiary) 16%, transparent);
}

/* --- Page canvas and header ---------------------------------------------- */
body {
  background:
    radial-gradient(900px 420px at 85% -80px, var(--polish-warm), transparent 70%),
    radial-gradient(900px 480px at -10% -120px, var(--polish-glow), transparent 70%),
    var(--md-sys-color-surface);
  background-repeat: no-repeat;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--md-sys-color-surface) 82%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 0;
  box-shadow: 0 1px 0 var(--md-sys-color-outline-variant);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--md-sys-color-primary),
    var(--md-sys-color-tertiary) 60%,
    transparent
  );
  opacity: 0.85;
}

.brand {
  letter-spacing: 0.01em;
}

.brand-text {
  font-weight: 600;
}

/* --- Entrance motion ------------------------------------------------------ */
@keyframes polish-rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  main > *,
  .app-content > * {
    animation: polish-rise var(--md-sys-motion-duration-medium2)
      var(--md-sys-motion-easing-emphasized-decelerate) both;
  }

  main > *:nth-child(2),
  .app-content > *:nth-child(2) { animation-delay: 40ms; }
  main > *:nth-child(3),
  .app-content > *:nth-child(3) { animation-delay: 80ms; }
  main > *:nth-child(4),
  .app-content > *:nth-child(4) { animation-delay: 120ms; }
  main > *:nth-child(n + 5),
  .app-content > *:nth-child(n + 5) { animation-delay: 160ms; }
}

/* --- Cards, panels, tables ------------------------------------------------ */
.panel,
.form-card,
.filters {
  border-radius: var(--md-sys-shape-corner-large);
  box-shadow: var(--polish-soft);
}

.table-scroll {
  border-radius: var(--md-sys-shape-corner-large);
  box-shadow: var(--polish-soft);
  overflow: auto;
}

.table-scroll thead th {
  background: color-mix(in srgb, var(--md-sys-color-primary) 7%, var(--md-sys-color-surface-container-low));
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

.table-scroll tbody tr {
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

@media (hover: hover) {
  .table-scroll tbody tr:hover {
    background: color-mix(in srgb, var(--md-sys-color-primary) 5%, transparent);
  }
}

.panel > h2:first-child,
.panel-header h2 {
  font-weight: 600;
}

/* Interactive cards lift a little. */
.action-card,
.card-awaiting {
  transition:
    transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .action-card:hover,
  .card-awaiting:hover {
    transform: translateY(-2px);
    box-shadow: var(--polish-lift);
  }
}

.action-card {
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container-lowest);
}

.action-card .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

/* --- Buttons --------------------------------------------------------------- */
.button:not(.button-secondary):not(.button-danger):not(.button-google):not(.button-small) {
  box-shadow: 0 1px 2px rgb(0 0 0 / 0.18), 0 4px 12px color-mix(in srgb, var(--md-sys-color-primary) 28%, transparent);
}

.button {
  transition:
    box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    transform var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

@media (prefers-reduced-motion: no-preference) {
  .button:active {
    transform: scale(0.98);
  }
}

/* --- Shared small pieces --------------------------------------------------- */
.eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--md-sys-color-tertiary);
}

.count-badge {
  display: inline-grid;
  place-items: center;
  min-width: 1.6rem;
  height: 1.6rem;
  padding: 0 0.45rem;
  margin-left: 0.5rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-size: 0.875rem;
  font-weight: 600;
  vertical-align: middle;
}

/* --- Staff home ------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.75rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background:
    radial-gradient(420px 220px at 100% 0, var(--polish-warm), transparent 70%),
    linear-gradient(
      135deg,
      var(--md-sys-color-primary-container),
      color-mix(in srgb, var(--md-sys-color-primary-container) 55%, var(--md-sys-color-surface))
    );
  color: var(--md-sys-color-on-primary-container);
  align-items: center;
}

.hero h1,
.hero .page-lede {
  color: var(--md-sys-color-on-primary-container);
}

.hero .chip {
  background: color-mix(in srgb, var(--md-sys-color-surface) 70%, transparent);
  border-color: color-mix(in srgb, var(--md-sys-color-on-primary-container) 20%, transparent);
  color: var(--md-sys-color-on-surface);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
}

.stat-tile {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "icon value" "icon label";
  column-gap: 0.9rem;
  align-items: center;
  padding: 1rem 1.15rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-lowest);
  box-shadow: var(--polish-soft);
  overflow: hidden;
}

.stat-tile::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--md-sys-color-primary);
}

.stat-tile-warn::before {
  background: var(--md-sys-color-error);
}

.stat-tile-icon {
  grid-area: icon;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.stat-tile-warn .stat-tile-icon {
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

.stat-tile-value {
  grid-area: value;
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.15;
}

.stat-tile-label {
  grid-area: label;
  margin-top: 0;
}

/* --- Sign-in landing page ---------------------------------------------------- */
.container:has(.landing) {
  max-width: 1080px;
}

.landing {
  padding: 1.5rem 0 0;
}

.landing-hero2 {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
  padding: 2.5rem 2.25rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background:
    radial-gradient(520px 260px at 100% 0, var(--polish-warm), transparent 70%),
    linear-gradient(
      135deg,
      var(--md-sys-color-primary-container),
      color-mix(in srgb, var(--md-sys-color-primary-container) 45%, var(--md-sys-color-surface))
    );
  color: var(--md-sys-color-on-primary-container);
  overflow: hidden;
}

.landing-hero2 .landing-logo {
  width: 120px;
  max-width: 120px;
  margin: 0 0 1.1rem;
  padding: 6px;
  border-radius: var(--md-sys-shape-corner-large);
  background: #fff;
  box-shadow: var(--polish-soft);
}

.landing-hero2 h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4.2vw, 3rem);
  line-height: calc(1.12 * var(--md-lang-height));
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--md-sys-color-on-primary-container);
}

.landing-sub {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  font-size: 1.125rem;
  line-height: calc(1.6rem * var(--md-lang-height));
  color: var(--md-sys-color-on-primary-container);
}

.landing-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.landing-cta .button-google {
  background: var(--md-sys-color-surface-container-lowest);
  color: var(--md-sys-color-on-surface);
  box-shadow: var(--polish-lift);
}

.landing-note {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--md-sys-color-on-primary-container);
  opacity: 0.85;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.trust-row li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: color-mix(in srgb, var(--md-sys-color-surface) 72%, transparent);
  color: var(--md-sys-color-on-surface);
  font-size: 0.875rem;
  font-weight: 500;
}

.landing-art {
  display: grid;
  place-items: center;
}

.landing-art svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 18px 28px rgb(0 0 0 / 0.14));
}

.art-card { fill: var(--md-sys-color-surface-container-lowest); }
.art-line { fill: var(--md-sys-color-surface-container-highest); }
.art-accent { fill: var(--md-sys-color-primary); }
.art-warm { fill: var(--md-sys-color-tertiary); }
.art-soft { fill: var(--md-sys-color-secondary-container); }
.art-success { fill: var(--md-sys-color-success); }
.art-on { fill: var(--md-sys-color-on-primary); }
.art-star { fill: var(--md-sys-color-tertiary); }
.art-star-off { fill: var(--md-sys-color-outline-variant); }
.art-check { stroke: var(--md-sys-color-on-primary); }

.landing-section {
  margin-top: 2.5rem;
}

.landing-section h2 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-card {
  padding: 1.4rem 1.35rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-lowest);
  box-shadow: var(--polish-soft);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 0.9rem;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

.feature-card:nth-child(3) .feature-icon {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.feature-card strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 4rem;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-low);
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1.1rem;
  top: 1.1rem;
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-weight: 700;
}

.steps strong {
  display: block;
  margin-bottom: 0.2rem;
}

.steps span {
  color: var(--md-sys-color-on-surface-variant);
}

@media (max-width: 760px) {
  .landing-hero2 {
    grid-template-columns: 1fr;
    padding: 1.75rem 1.25rem;
  }

  .landing-art {
    order: -1;
  }

  .landing-art svg {
    max-width: 260px;
  }
}

/* --- Student home ----------------------------------------------------------- */
.student-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.4rem 1.5rem;
  margin: 0 0 1.5rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background:
    radial-gradient(360px 200px at 100% 0, var(--polish-warm), transparent 70%),
    linear-gradient(
      135deg,
      var(--md-sys-color-primary-container),
      color-mix(in srgb, var(--md-sys-color-primary-container) 50%, var(--md-sys-color-surface))
    );
  color: var(--md-sys-color-on-primary-container);
}

.student-hero h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: calc(1.2 * var(--md-lang-height));
  color: var(--md-sys-color-on-primary-container);
}

.student-hero p {
  margin: 0.2rem 0 0;
  color: var(--md-sys-color-on-primary-container);
}

.student-hero .hero-year {
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0.9;
}

.progress-ring {
  position: relative;
  flex-shrink: 0;
  width: 92px;
  height: 92px;
}

.progress-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: color-mix(in srgb, var(--md-sys-color-on-primary-container) 18%, transparent);
  stroke-width: 3.6;
}

.ring-value {
  fill: none;
  stroke: var(--md-sys-color-primary);
  stroke-width: 3.6;
  stroke-linecap: round;
}

.ring-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--md-sys-color-on-primary-container);
}

.container h2:has(+ .card-list),
.container h2:has(+ h3) {
  display: flex;
  align-items: center;
}

.card {
  border-radius: var(--md-sys-shape-corner-large);
}

.card-awaiting {
  padding: 1.15rem 1.35rem;
  background: var(--md-sys-color-surface-container-lowest);
}

.card-title {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.card-title .muted {
  font-size: 0.875rem;
}

.course-avatar {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.card-awaiting:nth-of-type(even) .course-avatar {
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

.card-completed {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.card-completed .icon-success {
  display: inline-grid;
  place-items: center;
}

.progress-track {
  height: 10px;
  background: var(--md-sys-color-surface-container-highest);
}

.progress-fill {
  background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
}

.empty-state {
  padding: 1.1rem 1.25rem;
  border: 1px dashed var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  background: color-mix(in srgb, var(--md-sys-color-surface-container-low) 70%, transparent);
}

.all-done {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-success-container);
  color: var(--md-sys-color-on-success-container);
}

.site-footer {
  border-top: 0;
  box-shadow: 0 -1px 0 var(--md-sys-color-outline-variant);
}

@media (max-width: 520px) {
  .student-hero {
    padding: 1.1rem 1.1rem;
  }

  .progress-ring {
    width: 72px;
    height: 72px;
  }
}

/* --- Feedback form -------------------------------------------------------- */
:root {
  --header-h: 3.9rem;
}

.form-hero {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1rem;
}

.form-hero h1 {
  margin: 0;
  font-size: clamp(1.25rem, 3.6vw, 1.75rem);
  line-height: calc(1.25 * var(--md-lang-height));
}

.form-hero p {
  margin: 0.15rem 0 0;
}

.course-avatar-lg {
  width: 56px;
  height: 56px;
  font-size: 1rem;
  border-radius: var(--md-sys-shape-corner-large);
}

.anonymity-card {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 1rem 1.15rem;
  border-radius: var(--md-sys-shape-corner-large);
  border: 0;
}

.anonymity-icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-surface-container-lowest);
  color: var(--md-sys-color-primary);
}

/* The progress strip stays under the sticky header while scrolling. */
.form-progress {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  margin: 0 0 1.25rem;
  padding: 0.65rem 0.9rem 0.55rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  background: color-mix(in srgb, var(--md-sys-color-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--polish-soft);
}

.form-progress .progress-track {
  margin: 0.35rem 0 0.3rem;
}

.form-progress .progress-text {
  margin: 0;
}

@media (max-width: 600px) {
  .form-progress {
    top: var(--header-h);
    margin: 0 0 1rem;
    border-radius: var(--md-sys-shape-corner-large);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
  }
}

#feedback-form {
  counter-reset: question;
}

#feedback-form fieldset {
  min-width: 0;
  margin: 0 0 1.75rem;
  padding: 0;
  border: 0;
}

#feedback-form legend {
  float: left;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0;
  margin: 0 0 0.85rem;
  font-size: 1.25rem;
  font-weight: 600;
}

#feedback-form legend + .question {
  clear: both;
}

.section-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

/* A question is a card with a number that turns into a tick once answered. */
#feedback-form .question {
  margin: 0 0 0.9rem;
  padding: 1.1rem 1.2rem 1.2rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-lowest);
  box-shadow: var(--polish-soft);
  transition:
    border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

#feedback-form .question:last-child {
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

#feedback-form .question:focus-within {
  border-color: var(--md-sys-color-primary);
}

#feedback-form .question-answered {
  border-color: color-mix(in srgb, var(--md-sys-color-success) 55%, var(--md-sys-color-outline-variant));
}

#feedback-form .question-error {
  border-color: var(--md-sys-color-error);
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

#feedback-form .question-error .required,
#feedback-form .question-error .field-error {
  color: var(--md-sys-color-on-error-container);
}

#feedback-form .question-text {
  position: relative;
  display: block;
  min-height: 1.9rem;
  margin: 0 0 0.85rem;
  padding-left: 2.65rem;
  font-size: 1rem;
  font-weight: 500;
  line-height: calc(1.45rem * var(--md-lang-height));
}

#feedback-form .question-text::before {
  counter-increment: question;
  content: counter(question);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-size: 0.875rem;
  font-weight: 700;
}

#feedback-form .question-answered .question-text::before {
  content: "\2713";
  background: var(--md-sys-color-success);
  color: var(--md-sys-color-on-success);
}

/* Answer options as full-width choice cards: the options are whole sentences,
   so they read better as a list than as small pills. */
#feedback-form .question > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  padding-left: 0;
}

@media (min-width: 640px) {
  #feedback-form .question > div {
    padding-left: 2.65rem;
  }

  /* Yes / No sit side by side. */
  #feedback-form .question > div:has(> div:nth-child(2):last-child) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

#feedback-form .question > div > div > label:has(input[type="radio"]) {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.8rem;
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-size: 1rem;
  cursor: pointer;
  transition:
    border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

#feedback-form .question > div > div > label:has(input[type="radio"])::before {
  content: "";
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-surface-container-lowest);
  transition:
    border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

@media (hover: hover) {
  #feedback-form .question > div > div > label:has(input[type="radio"]):hover {
    border-color: var(--md-sys-color-primary);
    background: color-mix(in srgb, var(--md-sys-color-primary) 6%, var(--md-sys-color-surface));
  }
}

#feedback-form .question > div > div > label:has(input[type="radio"]:checked) {
  border-color: var(--md-sys-color-primary);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

#feedback-form .question > div > div > label:has(input[type="radio"]:checked)::before {
  border-color: var(--md-sys-color-primary);
  background: var(--md-sys-color-primary);
  box-shadow: inset 0 0 0 3.5px var(--md-sys-color-primary-container);
}

#feedback-form .question > div > div > label:has(input[type="radio"]:focus-visible) {
  outline: 3px solid color-mix(in srgb, var(--md-sys-color-primary) 55%, transparent);
  outline-offset: 2px;
}

/* Text answers. */
#feedback-form .question textarea,
#feedback-form .question input[type="text"] {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font: inherit;
}

@media (min-width: 640px) {
  #feedback-form .question textarea,
  #feedback-form .question input[type="text"] {
    width: calc(100% - 2.65rem);
    margin-left: 2.65rem;
  }
}

#feedback-form .question textarea:focus,
#feedback-form .question input[type="text"]:focus {
  border-color: var(--md-sys-color-primary);
  outline: 3px solid color-mix(in srgb, var(--md-sys-color-primary) 30%, transparent);
  outline-offset: 0;
}

.submit-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin: 1.5rem 0 0.5rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-low);
}

.submit-bar p {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

@media (max-width: 600px) {
  .submit-bar {
    flex-direction: column;
    align-items: stretch;
  }
}

/* --- Thank-you page --------------------------------------------------------- */
.thanks-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 1.75rem;
  padding: 2rem 1.5rem 1.75rem;
  text-align: center;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background:
    radial-gradient(420px 220px at 50% 0, var(--polish-warm), transparent 70%),
    linear-gradient(
      160deg,
      var(--md-sys-color-success-container),
      color-mix(in srgb, var(--md-sys-color-success-container) 45%, var(--md-sys-color-surface))
    );
  color: var(--md-sys-color-on-success-container);
}

.thanks-hero h1 {
  margin: 0.5rem 0 0.35rem;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  color: var(--md-sys-color-on-success-container);
}

.thanks-lede {
  margin: 0 auto 0.5rem;
  max-width: 28rem;
  font-size: 1.125rem;
  color: var(--md-sys-color-on-success-container);
}

.thanks-note {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0.5rem 0 0;
  padding: 0.3rem 0.9rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: color-mix(in srgb, var(--md-sys-color-surface) 70%, transparent);
  color: var(--md-sys-color-on-surface);
  font-size: 0.875rem;
}

.thanks-check {
  width: 108px;
  margin: 0 auto;
}

.thanks-check svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.thanks-ring {
  fill: var(--md-sys-color-success);
  stroke: none;
}

.thanks-tick {
  fill: none;
  stroke: var(--md-sys-color-on-success);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.spark { fill: var(--md-sys-color-tertiary); }
.spark-b { fill: var(--md-sys-color-primary); }
.spark-c { fill: var(--md-sys-color-tertiary); opacity: 0.7; }
.spark-d { fill: var(--md-sys-color-success); }

@keyframes thanks-pop {
  0% { transform: scale(0.6); opacity: 0; }
  60% { transform: scale(1.08); opacity: 1; }
  100% { transform: scale(1); }
}

@keyframes thanks-draw {
  from { stroke-dashoffset: 70; }
  to { stroke-dashoffset: 0; }
}

@keyframes thanks-spark {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(1); }
}

@media (prefers-reduced-motion: no-preference) {
  .thanks-ring {
    transform-box: fill-box;
    transform-origin: center;
    animation: thanks-pop 0.55s var(--md-sys-motion-easing-emphasized-decelerate) both;
  }

  .thanks-tick {
    stroke-dasharray: 70;
    animation: thanks-draw 0.5s 0.35s var(--md-sys-motion-easing-standard) both;
  }

  .spark {
    transform-box: fill-box;
    transform-origin: center;
    animation: thanks-spark 0.5s 0.6s var(--md-sys-motion-easing-emphasized-decelerate) both;
  }

  .spark-b { animation-delay: 0.7s; }
  .spark-c { animation-delay: 0.8s; }
  .spark-d { animation-delay: 0.9s; }
}

.thanks-actions {
  text-align: center;
}

/* --- Finishing touches -------------------------------------------------------------------------- */
/* Typography: balanced headings, tidy paragraphs, tabular figures where numbers line up. */
h1,
h2,
h3 {
  text-wrap: balance;
}

p,
li,
dd {
  text-wrap: pretty;
}

h1 {
  letter-spacing: -0.012em;
}

body {
  font-optical-sizing: auto;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

html {
  scroll-padding-top: calc(var(--header-h, 3.9rem) + 1rem);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

::selection {
  background: color-mix(in srgb, var(--md-sys-color-primary) 28%, transparent);
}

/* A slim, quiet scrollbar everywhere it can be styled. */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--md-sys-color-outline-variant) transparent;
}

/* Buttons show they are working once a form is submitted (the script disables
   the button; this draws the spinner). */
button[type="submit"][aria-busy="true"] {
  position: relative;
  cursor: progress;
}

button[type="submit"][aria-busy="true"]::after {
  content: "";
  display: inline-block;
  width: 0.95em;
  height: 0.95em;
  margin-left: 0.6rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  vertical-align: -0.12em;
}

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

@media (prefers-reduced-motion: no-preference) {
  button[type="submit"][aria-busy="true"]::after {
    animation: polish-spin 0.7s linear infinite;
  }
}

/* Empty states read as a place to look at, not a stray line of text. */
.empty-state {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--md-sys-color-on-surface-variant);
}

.empty-state .icon {
  display: inline-grid;
  place-items: center;
  box-sizing: content-box;
  width: 22px;
  height: 22px;
  padding: 0.55rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

/* Slow, soft drift on the decorative circles of the hero art. */
@keyframes polish-drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@media (prefers-reduced-motion: no-preference) {
  .landing-art .art-warm,
  .landing-art .art-accent {
    animation: polish-drift 6s ease-in-out infinite;
  }

  .landing-art .art-accent {
    animation-delay: -3s;
  }
}

/* Links in running text get a calmer underline. */
.container p a,
.app-content p a,
.notice a {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.container p a:hover,
.app-content p a:hover {
  text-decoration-thickness: 2px;
}