/* Values taken from the "Feedback form" design mockup (DArT design tokens). */
:root {
  --primary-green: #81c44c;
  --secondary-green: #a4cf60;
  --dark-accent-green: #228848;
  --light-accent-green: #e2efd8;
  --light-accent-green-20: #f9fbf7;
  --charcoal: #3d3935;
  --charcoal-50: #9d9c99;
  --charcoal-20: #d8d8d7;
  --white: #ffffff;
  --kd-navy: #1b2e5c;
  --kd-blue-20: #d2e8f4;
  --kd-red-20: #f8dcda;

  --radius-block: 10px;
  --radius-general: 12px;
  --radius-full: 999px;
  --font-sans: "Atkinson Hyperlegible", sans-serif;

  /* Fluid spacing: scales between phone and desktop values */
  --gutter: clamp(16px, 4vw, 24px);
  --card-pad: clamp(16px, 4vw, 32px);
  --section-gap: clamp(28px, 5vw, 40px);
  --content-max: 880px;
}

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--light-accent-green-20);
  font-family: var(--font-sans);
  color: var(--charcoal);
  overflow-wrap: anywhere;
}
a { color: var(--dark-accent-green); }
a:hover { color: var(--kd-navy); }
input, select, textarea, button { font-family: inherit; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--dark-accent-green);
  outline-offset: 2px;
}
[hidden] { display: none !important; }

.page { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
.container { width: 100%; max-width: var(--content-max); margin: 0 auto; }

/* Banner */
.confidential-banner {
  background: var(--charcoal);
  color: var(--white);
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px 12px;
  flex-wrap: wrap;
  text-align: center;
  font-size: clamp(14px, 1vw + 10px, 16px);
  line-height: 1.4;
}
.confidential-banner strong { letter-spacing: 0.02em; }

/* Header */
.site-header { background: var(--white); border-bottom: 1px solid var(--charcoal-20); }
.header-inner {
  padding: clamp(14px, 3vw, 20px) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 8px 16px; flex-wrap: wrap; }
/* Official DArT primary logo (aspect ~5:1). Scales down a little on phones. */
.brand-logo { display: block; height: clamp(32px, 3vw + 20px, 40px); width: auto; flex: none; }
.brand-divider { width: 1px; align-self: stretch; min-height: 28px; background: var(--charcoal-20); }
.brand-name { font-size: clamp(18px, 1vw + 14px, 20px); font-weight: 700; }
.header-links { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: 14px; font-weight: 700; }
.header-links a { text-decoration: none; padding: 6px 0; }
.header-links a:hover, .header-links a:focus-visible { text-decoration: underline; }

/* Main */
.main {
  flex: 1;
  padding: clamp(28px, 6vw, 48px) var(--gutter) clamp(40px, 8vw, 64px);
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
}
.intro { display: flex; flex-direction: column; gap: 12px; }
h1 { margin: 0; font-size: clamp(32px, 4vw + 16px, 48px); line-height: 1; font-weight: 700; color: var(--dark-accent-green); }
.divider { width: 96px; height: 10px; border-radius: var(--radius-full); background: var(--primary-green); }
.lede { margin: 8px 0 0; font-size: clamp(17px, 0.75vw + 14px, 20px); line-height: 1.4; max-width: 640px; }

/* Success */
.success {
  background: var(--light-accent-green);
  border-radius: var(--radius-general);
  padding: var(--card-pad);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}
.success h2 { margin: 0; font-size: clamp(22px, 2vw + 14px, 28px); font-weight: 700; color: var(--dark-accent-green); outline: none; }
.success p { margin: 0; font-size: 16px; line-height: 1.5; }

/* Form layout */
.form { display: flex; flex-direction: column; gap: var(--section-gap); }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset.plain { display: flex; flex-direction: column; gap: 16px; }
fieldset.plain legend { font-size: clamp(20px, 1vw + 16px, 24px); font-weight: 700; padding: 0; margin-bottom: 16px; }
fieldset.card {
  padding: var(--card-pad);
  background: var(--white);
  border-radius: var(--radius-general);
  border: 1px solid var(--charcoal-20);
  display: flex;
  flex-direction: column;
  gap: 24px;
}
fieldset.card legend { font-size: clamp(20px, 1vw + 16px, 24px); font-weight: 700; padding: 0 8px; }

.hint { margin: 0; font-size: 14px; }
/* min(…, 100%) stops a column ever being wider than a narrow phone screen */
.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: 20px; }
.field-grid.three { grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr)); }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label, .label { font-size: 16px; font-weight: 700; }

input[type="text"], input[type="email"], select, textarea {
  min-height: 44px;
  padding: 10px 14px;
  border-radius: var(--radius-general);
  border: 1px solid var(--charcoal-50);
  font-size: 16px;
  color: var(--charcoal);
  background: var(--white);
  width: 100%;
}
textarea { line-height: 1.4; resize: vertical; }
input[aria-invalid="true"], select[aria-invalid="true"], textarea[aria-invalid="true"] {
  border-color: #db4f48;
  border-width: 2px;
}

/* 1. App cards */
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: 16px; }
.app-card {
  --selected-border: var(--dark-accent-green);
  --selected-ground: var(--light-accent-green);
  --badge: var(--primary-green);
  --badge-ink: var(--charcoal);
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 88px;
  padding: 16px clamp(14px, 3vw, 20px);
  border-radius: var(--radius-general);
  cursor: pointer;
  color: var(--charcoal);
  border: 2px solid var(--charcoal-20);
  background: var(--white);
}
.app-card[data-app="kdsmart"] {
  --selected-border: var(--kd-navy);
  --selected-ground: var(--kd-blue-20);
  --badge: var(--kd-navy);
  --badge-ink: var(--white);
}
.app-card[aria-pressed="true"] { border-color: var(--selected-border); background: var(--selected-ground); }
.app-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-general);
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--badge);
  color: var(--badge-ink);
  font-weight: 700;
  font-size: 18px;
}
.app-text { display: flex; flex-direction: column; gap: 4px; text-align: left; }
.app-name { font-size: clamp(18px, 1vw + 14px, 20px); font-weight: 700; }
.app-blurb { font-size: 14px; }

/* 2. Platform pills */
.pill-row { display: flex; gap: 12px; flex-wrap: wrap; }
.pill {
  min-height: 44px;
  min-width: 120px;
  padding: 10px 24px;
  border-radius: var(--radius-full);
  border: 2px solid var(--charcoal);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  background: var(--white);
  color: var(--charcoal);
}
.pill[aria-pressed="true"] { background: var(--charcoal); color: var(--white); }

/* Rating chips: one row of 10 where it fits, two rows of 5 on small screens */
.rating-row {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 8px;
  max-width: 560px;
}
.chip {
  min-width: 44px;
  height: 48px;
  border-radius: var(--radius-general);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  color: var(--charcoal);
  border: 2px solid var(--charcoal-50);
  background: var(--white);
}
.chip[aria-pressed="true"] { background: var(--primary-green); border-color: var(--dark-accent-green); }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Errors + submit */
.alert {
  margin: 0;
  padding: 12px 16px;
  border-radius: var(--radius-block);
  background: var(--kd-red-20);
  color: var(--charcoal);
  font-size: 16px;
  font-weight: 700;
}
.submit-row { display: flex; align-items: center; gap: 12px 16px; flex-wrap: wrap; }
.btn-primary {
  min-height: 48px;
  padding: 12px 32px;
  border-radius: var(--radius-general);
  border: 0;
  background: var(--primary-green);
  color: var(--charcoal);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary:hover { background: var(--secondary-green); }
.btn-primary:disabled { opacity: 0.6; cursor: wait; }
.btn-secondary {
  min-height: 44px;
  padding: 12px 24px;
  border-radius: var(--radius-general);
  border: 2px solid var(--dark-accent-green);
  background: var(--white);
  color: var(--charcoal);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

/* Footer */
.site-footer { border-top: 1px solid var(--charcoal-20); background: var(--white); }
.footer-inner {
  padding: 20px var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  line-height: 16px;
}

/* --- Responsive --- */

/* Phones and small tablets */
@media (max-width: 700px) {
  .rating-row { grid-template-columns: repeat(5, 1fr); max-width: 320px; }
}

/* Phones */
@media (max-width: 480px) {
  .header-links { gap: 4px 16px; }
  .brand-divider { display: none; }
  .pill { flex: 1 1 0; min-width: 0; }
  .btn-primary, .btn-secondary { width: 100%; }
  .submit-row { flex-direction: column; align-items: stretch; text-align: center; }
  .footer-inner { flex-direction: column; }
}

/* Large desktops and widescreens: widen the column a little, keep line lengths readable */
@media (min-width: 1440px) {
  :root { --content-max: 1000px; }
}
@media (min-width: 1920px) {
  :root { --content-max: 1120px; }
}