/* Shared foundation and site chrome, loaded by base.html on every route. */
:root {
  color-scheme: dark;
  --bg: #0D1117;
  --surface: #131A22;
  --card: #181F28;
  --card-hover: #202937;
  --border: #2A3442;
  --text: #F5F7FA;
  --text-secondary: #A4B0BE;
  --text-muted: #6D7785;
  --primary: #34D399;
  --primary-hover: #2EC48E;
  --primary-soft: rgba(52, 211, 153, .15);
  --ink: var(--text);
  --muted: var(--text-secondary);
  --line: var(--border);
  --panel: var(--surface);
  --panel-2: var(--card);
  --lime: var(--primary);
  --lime-dark: var(--primary);
  --page-width: 1180px;
  --page-gutter: 40px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  font-size: var(--type-root);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 72% -10%, rgba(52, 211, 153, .11), transparent 32rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

a { color: inherit; }
h1, h2, h3, p { margin-top: 0; }

.eyebrow,
.hero-tag {
  color: var(--lime);
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.card-label {
  display: block;
  color: var(--lime);
  font: 500 var(--type-label)/1.4 var(--font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

footer {
  padding: 28px 20px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  text-align: center;
  font-family: var(--font-mono);
}
.site-nav {
  position: relative;
  z-index: 50;
  width: min(var(--page-width), calc(100% - var(--page-gutter)));
  min-height: 76px;
  padding-top: 8px;
  margin: 0 auto;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-nav::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100vw;
  height: 2px;
  background: linear-gradient(90deg, transparent 3%, rgba(52,211,153,.16) 24%, rgba(52,211,153,.72) 50%, rgba(52,211,153,.16) 76%, transparent 97%);
  box-shadow: 0 1px 12px rgba(52,211,153,.12);
  transform: translateX(-50%);
  pointer-events: none;
}

.site-nav .nav-brand { min-width: 0; display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; text-decoration: none; }
.site-nav .brand-mark { width: 48px; height: 48px; display: block; flex: 0 0 auto; }
.site-nav .brand-mark img { display: block; width: 100%; height: 100%; }
.site-nav-links {
  min-width: 0;
  margin-left: auto;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  overflow: visible;
  white-space: nowrap;
}
.site-nav-links a, .site-nav-links button {
  min-height: 44px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
}
.site-nav-links .site-nav-help,
.site-nav-links .site-nav-contact {
  width: 44px;
  padding: 0;
}
.site-nav-links .site-nav-help {
  font-size: var(--type-icon);
  font-weight: 800;
}
.site-nav-links .site-nav-contact svg { display: block; width: 18px; height: 18px; }
.nav-label-short { display:none; }
.site-nav-links a:hover, .site-nav-links a:focus-visible, .site-nav-links button:hover, .site-nav-links button:focus-visible {
  outline: 0;
  border-color: var(--lime, #34D399);
  background: color-mix(in srgb, var(--lime, #34D399) 10%, transparent);
  color: var(--ink);
}
.site-nav-links .site-nav-active {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--lime, #34D399);
  text-decoration-thickness: 2px;
  text-underline-offset: 7px;
}
.site-nav-links .site-nav-primary {
  border-color: transparent;
  background: transparent;
  color: var(--lime, #34D399);
  box-shadow: none;
  font-weight: 800;
}
.site-nav-links .site-nav-primary:hover, .site-nav-links .site-nav-primary:focus-visible {
  border-color: var(--lime, #34D399);
  background: color-mix(in srgb, var(--lime, #34D399) 10%, transparent);
  color: var(--lime, #34D399);
  box-shadow: 0 0 0 1px rgba(52,211,153,.12);
}
.site-nav-links .site-nav-shop {
  border-color: transparent;
  color: var(--ink);
}
.site-nav-links .site-nav-shop:hover, .site-nav-links .site-nav-shop:focus-visible {
  border-color: var(--lime, #34D399);
}
.contact-dialog { width: min(430px, calc(100% - 24px)); max-width: calc(100vw - 24px); padding: 0; border: 1px solid var(--line, #2A3442); border-radius: 18px; background: var(--panel, #131A22); color: var(--ink); box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.contact-dialog::backdrop { background: rgba(3,8,10,.72); backdrop-filter: blur(4px); }
.contact-dialog-body { padding: clamp(20px, 5vw, 28px); }
.contact-dialog-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.contact-dialog h2 { margin: 0 0 8px; font-size: var(--type-dialog-title); }
.contact-dialog p { margin: 0; color: var(--muted); font-size: var(--type-body); line-height: 1.65; }
.contact-email { display: block; margin-top: 22px; padding: 14px 16px; overflow-wrap: anywhere; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2, #181F28); color: var(--ink); font: 500 var(--type-button) var(--font-mono); text-decoration: none; }
.contact-email:hover { border-color: var(--lime, #34D399); }
.dialog-close { width: 36px; height: 36px; flex: 0 0 auto; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2, #181F28); color: var(--ink); cursor: pointer; font-size: var(--type-icon); }

.button {
  min-height: 44px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
}

.button svg { width: 17px; }
.button.primary { border-color: var(--lime); background: var(--lime); color: #07110C; }
.button:disabled { cursor: not-allowed; opacity: .42; }

/* Shared Program Collection card component used by the home and collection pages. */
.program-grid {
  display: grid;
  gap: 14px;
}

.program-card {
  position: relative;
  padding: 28px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(145deg, #181F28, #131A22);
}

.program-card::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -75px;
  width: 210px;
  height: 210px;
  border: 34px solid rgba(44, 201, 154, .13);
  border-radius: 50%;
}

.program-card h3 {
  position: relative;
  margin: 0 0 10px;
  font-size: var(--type-card-title);
}

.program-card > p {
  position: relative;
  min-height: 58px;
  margin: 0;
  flex: 1;
  color: var(--muted);
  font-size: var(--type-body);
  line-height: 1.65;
}

.program-support {
  position: relative;
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.support-bubble {
  min-height: 30px;
  padding: 5px 10px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(52, 211, 153, .055);
  color: var(--muted);
  font: 700 var(--type-label)/1.35 var(--font-mono);
}

.support-language { border-color: rgba(52, 211, 153, .42); color: var(--lime); }

.program-card-actions {
  position: relative;
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.program-card-actions .button {
  min-height: 44px;
  padding: 0 17px;
  font-size: var(--type-button);
}

/* Palette-only polish shared by every page. */
body { background-color: var(--bg); color: var(--text); }
.button:not(.primary),
.step-navigation:not(.step-next),
.editor-action-button,
.dialog-close,
.icon-button {
  border-color: var(--border);
  color: var(--text);
}
.button:not(.primary):hover,
.step-navigation:not(.step-next):hover,
.editor-action-button:hover,
.dialog-close:hover,
.icon-button:hover {
  border-color: color-mix(in srgb, var(--primary) 48%, var(--border));
  background-color: rgba(52, 211, 153, .08);
}
.button.primary:hover,
.step-navigation.step-next:hover,
.notify-button:hover {
  background: var(--primary-hover);
}
.program-card,
.workflow-card,
.path-card,
.control-item,
.step-question {
  border-color: var(--border);
  background: var(--card);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}
.kit-card,
.panel,
.stats-card {
  border-color: var(--border);
  background: var(--card);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}
.program-card:hover,
.path-card:hover,
.control-item:hover {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
  background: var(--card-hover);
}
.support-bubble,
.hero-tag {
  border-color: var(--border);
  background: transparent;
  color: var(--text-secondary);
}
.support-bubble:hover,
.hero-tag:hover {
  background: rgba(52, 211, 153, .12);
}

/* MicroPy Kids is the canonical visual system for program pages. */
body[data-program] {
  --program-space-md: 16px;
  --program-space-lg: 24px;
  --program-shell-padding: 34px;
}
body[data-program] .shell {
  width: min(var(--page-width), calc(100% - var(--page-gutter)));
  margin: 0 auto 100px;
  border-color: var(--border);
  background: rgba(19, 26, 34, .82);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}
body[data-program="board-designer"] .shell,
body[data-program="countdown-pixel"] .shell {
  padding: 0;
}
body[data-program]:not([data-program="board-designer"]):not([data-program="countdown-pixel"]) .shell,
body[data-program] .shell > .workspace {
  padding: var(--program-shell-padding);
}
body[data-program] .topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}
body[data-program] .topbar h1,
body[data-program] .topbar h2 {
  margin: 7px 0 0;
  font-size: var(--type-section-title);
  line-height: 1.05;
  letter-spacing: -.055em;
}
body[data-program] .topbar .eyebrow {
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .13em;
  text-transform: uppercase;
}
body[data-program] .intro {
  max-width: 720px;
  margin: 0 0 28px;
  color: var(--text-secondary);
  line-height: 1.7;
}
body[data-program] .editor {
  width: 100%;
  margin: 0;
}
body[data-program] .config-grid {
  gap: var(--program-space-md);
  margin-bottom: var(--program-space-lg);
}
body[data-program] .panel {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}
body[data-program] .simulation-heading {
  margin: var(--program-space-lg) 0 var(--program-space-md);
}
body[data-program] .panel + .board-shell {
  margin-top: var(--program-space-lg);
}
body[data-program] .control-deck {
  margin-top: var(--program-space-md);
  gap: var(--program-space-md);
}
body[data-program] .panel,
body[data-program] .stats-card,
body[data-program] .learning-workspace,
body[data-program] .lesson-browser,
body[data-program] .editor-toolbar,
body[data-program] .guided-change {
  border-color: var(--border);
  background: var(--surface);
}
body[data-program] .representation {
  border-color: var(--border);
  background: var(--bg);
}
body[data-program] .representation[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  background: rgba(52, 211, 153, .1);
  color: var(--text);
}

@media (max-width: 760px) {
  :root { --page-gutter: 28px; }

  body[data-program] .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 650px) {
  .site-nav { min-height: 66px; padding: 9px 0 5px; gap: 8px; }
  .site-nav .brand-mark { width: 38px; height: 38px; }
  .site-nav-links { flex:1 1 auto; gap:2px; margin-right:-4px; overflow:visible; }
  .site-nav-links a, .site-nav-links button { min-height:44px; padding:0 7px; }
  .nav-label-full { display:none; }
  .nav-label-short { display:inline; }
  body[data-program] .shell {
    --program-shell-padding: 22px;
    margin-bottom: 64px;
  }
}