/* ==========================================================================
   Chalkbox design system
   Shared tokens + components for chalkbox.cc and every *.chalkbox.cc tool.
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Caveat:wght@500;700&family=Nunito:wght@400;600;700;800&display=swap");

:root {
  /* Chalkboard */
  --board: #24392f;
  --board-2: #2c463a;
  --board-line: rgba(244, 241, 232, 0.08);
  --wood: #9a6338;
  --wood-dark: #6b4222;
  --wood-light: #c08552;

  /* Chalk colors */
  --chalk: #f4f1e8;
  --chalk-dim: rgba(244, 241, 232, 0.72);
  --chalk-yellow: #ffd970;
  --chalk-pink: #ff9db5;
  --chalk-blue: #8fd0ff;
  --chalk-mint: #92e8b8;
  --chalk-orange: #ffb37a;

  /* Paper surfaces */
  --bg: #f7f1e3;
  --paper: #fffcf4;
  --paper-line: #d9e6f2;
  --margin-line: #f2a7a7;
  --ink: #26303a;
  --ink-soft: #5b6672;
  --border: #e6dcc6;
  --tape: rgba(255, 233, 160, 0.78);

  /* Accents (on paper) */
  --accent: #2f8f6a;
  --accent-ink: #ffffff;
  --accent-2: #e2725b;
  --accent-3: #3f7cc7;
  --accent-4: #e0a526;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 0 rgba(0, 0, 0, .04), 0 10px 24px -12px rgba(60, 40, 10, .35);
  --shadow-lift: 0 2px 0 rgba(0, 0, 0, .04), 0 22px 40px -18px rgba(60, 40, 10, .45);

  --font-chalk: "Caveat", "Comic Sans MS", cursive;
  --font-body: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #18221d;
    --paper: #222e28;
    --paper-line: rgba(143, 208, 255, .12);
    --margin-line: rgba(255, 157, 181, .25);
    --ink: #eef0ea;
    --ink-soft: #a9b5ae;
    --border: #34443b;
    --tape: rgba(255, 217, 112, .35);
    --accent: #5cc79a;
    --accent-ink: #10201a;
    --shadow: 0 10px 24px -12px rgba(0, 0, 0, .6);
    --shadow-lift: 0 22px 40px -18px rgba(0, 0, 0, .75);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #18221d;
  --paper: #222e28;
  --paper-line: rgba(143, 208, 255, .12);
  --margin-line: rgba(255, 157, 181, .25);
  --ink: #eef0ea;
  --ink-soft: #a9b5ae;
  --border: #34443b;
  --tape: rgba(255, 217, 112, .35);
  --accent: #5cc79a;
  --accent-ink: #10201a;
  --shadow: 0 10px 24px -12px rgba(0, 0, 0, .6);
  --shadow-lift: 0 22px 40px -18px rgba(0, 0, 0, .75);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--chalk-yellow); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

.chalk-text {
  font-family: var(--font-chalk);
  font-weight: 700;
  letter-spacing: .5px;
  filter: url(#chalk-rough);
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--wood-dark);
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.03) 0 2px, transparent 2px 9px),
    linear-gradient(180deg, var(--wood) 0%, var(--wood-dark) 100%);
  box-shadow: 0 3px 0 rgba(0,0,0,.18);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--chalk); }
.brand-mark { width: 36px; height: 36px; flex: none; }
.brand-name { font-family: var(--font-chalk); font-weight: 700; font-size: 30px; line-height: 1; }
.brand-name span { color: var(--chalk-yellow); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--chalk); text-decoration: none; font-weight: 700; font-size: 15px;
  padding: 7px 12px; border-radius: 999px;
}
.nav a:hover { background: rgba(255,255,255,.12); }
.theme-toggle {
  border: 0; background: rgba(255,255,255,.12); color: var(--chalk);
  width: 38px; height: 38px; border-radius: 50%; cursor: pointer; display: grid; place-items: center;
}
.theme-toggle:hover { background: rgba(255,255,255,.22); }
@media (max-width: 640px) {
  .nav a.hide-sm { display: none; }
  .brand-name { font-size: 26px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 800 16px/1 var(--font-body);
  padding: 13px 20px; border-radius: 999px; border: 2px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 4px 0 color-mix(in srgb, var(--accent) 60%, black); }
.btn-chalk { background: var(--chalk-yellow); color: #3a2c05; box-shadow: 0 4px 0 #b8952f; }
.btn-ghost { border-color: currentColor; background: transparent; color: inherit; }
.btn svg { width: 18px; height: 18px; }

/* ---------- Chalkboard surface ---------- */
.chalkboard {
  position: relative;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255,255,255,.06), transparent 60%),
    radial-gradient(ellipse at 80% 90%, rgba(0,0,0,.18), transparent 55%),
    var(--board);
  color: var(--chalk);
  border: 14px solid var(--wood);
  border-image: linear-gradient(135deg, var(--wood-light), var(--wood) 40%, var(--wood-dark)) 1;
  box-shadow: inset 0 0 60px rgba(0,0,0,.35), 0 18px 40px -20px rgba(0,0,0,.6);
}
/* faint eraser smudges */
.chalkboard::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 180px 40px at 20% 70%, rgba(255,255,255,.035), transparent 70%),
    radial-gradient(ellipse 240px 50px at 75% 30%, rgba(255,255,255,.03), transparent 70%),
    radial-gradient(ellipse 140px 30px at 60% 85%, rgba(255,255,255,.03), transparent 70%);
}

/* ---------- Index card (paper) ---------- */
.card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.card.ruled {
  background-image:
    linear-gradient(90deg, transparent 38px, var(--margin-line) 38px 40px, transparent 40px),
    repeating-linear-gradient(180deg, transparent 0 31px, var(--paper-line) 31px 32px);
  background-color: var(--paper);
}
.tape {
  position: absolute; top: -12px; left: 50%; width: 92px; height: 26px;
  background: var(--tape); transform: translateX(-50%) rotate(-3deg);
  box-shadow: 0 1px 2px rgba(0,0,0,.08);
  clip-path: polygon(2% 0, 98% 4%, 100% 50%, 97% 100%, 3% 96%, 0 50%);
}

/* ---------- Tags / chips ---------- */
.tag {
  display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: .3px;
  padding: 3px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--tag, var(--accent)) 16%, transparent);
  color: color-mix(in srgb, var(--tag, var(--accent)) 75%, var(--ink));
}

/* ---------- Section headings ---------- */
.section { padding: 72px 0; }
.eyebrow { font-weight: 800; text-transform: uppercase; letter-spacing: 1.6px; font-size: 13px; color: var(--accent-2); margin: 0 0 6px; }
.section-title { font-family: var(--font-chalk); font-weight: 700; font-size: clamp(38px, 5vw, 54px); line-height: 1.05; margin: 0 0 12px; }
.section-lead { color: var(--ink-soft); max-width: 60ch; margin: 0; font-size: 18px; }
.squiggle { display: block; width: 160px; height: 14px; margin: 4px 0 14px; color: var(--accent-4); }

/* ---------- Footer ---------- */
.footer {
  background: var(--board); color: var(--chalk-dim);
  border-top: 10px solid var(--wood);
  padding: 40px 0 32px; font-size: 15px;
}
.footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
.footer a { color: var(--chalk); }
.footer .brand-name { font-size: 26px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}