/* Shared styles for the home, Math and Reading pages. Each game keeps its own inline styles. */
:root {
  --sky: #DDF1FA; --sky-2: #F3FAFE; --card: #FFFFFF; --ink: #1F2A44; --soft-ink: #4A5878;
  --line: #CFE3EE; --sun: #FFC93C; --sun-ink: #6B4A00;
  --grape: #6C4AB6; --grape-bg: #EFE8FF; --grape-ink: #FFFFFF;
  --leaf: #1E7A43; --leaf-bg: #DDF5E6; --sea: #1D6FA5; --sea-bg: #DCEFFC;
  --coral: #B34A0E; --coral-bg: #FFE9D9; --berry: #C13560; --berry-bg: #FCE3EA;
  --shadow: 0 10px 30px rgba(31, 42, 68, .10), 0 2px 6px rgba(31, 42, 68, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sky: #14213A; --sky-2: #1A2946; --card: #1E2E4D; --ink: #F1F5FF; --soft-ink: #B8C4E0;
    --line: #2E4268; --sun: #FFC93C; --sun-ink: #FFE7A8;
    --grape: #A98BF0; --grape-bg: #2C2550; --grape-ink: #14213A;
    --leaf: #5FD68E; --leaf-bg: #173D2A; --sea: #6CC0F5; --sea-bg: #1B3552;
    --coral: #FFA266; --coral-bg: #3D2E22; --berry: #FF7FA0; --berry-bg: #4A1F2C;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --sky: #14213A; --sky-2: #1A2946; --card: #1E2E4D; --ink: #F1F5FF; --soft-ink: #B8C4E0;
  --line: #2E4268; --sun: #FFC93C; --sun-ink: #FFE7A8;
  --grape: #A98BF0; --grape-bg: #2C2550; --grape-ink: #14213A;
  --leaf: #5FD68E; --leaf-bg: #173D2A; --sea: #6CC0F5; --sea-bg: #1B3552;
  --coral: #FFA266; --coral-bg: #3D2E22; --berry: #FF7FA0; --berry-bg: #4A1F2C;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh;
  background: radial-gradient(1200px 600px at 10% -10%, var(--sky-2), transparent 60%), var(--sky);
  color: var(--ink);
  font-family: "Andika", "Century Gothic", "Trebuchet MS", system-ui, sans-serif;
  line-height: 1.45;
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
  overflow-x: hidden;
}
h1, h2, h3, .brand { font-family: "Fredoka", "Andika", "Trebuchet MS", system-ui, sans-serif; font-weight: 600; letter-spacing: .2px; }
a { color: inherit; }
:focus-visible { outline: 4px solid var(--grape); outline-offset: 3px; border-radius: 12px; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* Top bar */
.topbar { padding: 14px 0; }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-size: 1.15rem; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; flex: none;
  background: var(--grape); color: var(--grape-ink); font-size: 1.3rem; font-weight: 700;
}
.back {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none; font-weight: 700;
  background: var(--card); border: 2px solid var(--line); border-radius: 999px; padding: 8px 16px;
  min-height: 44px;
}
.back:hover { border-color: var(--grape); }

/* Home hero */
.hero { text-align: center; padding: clamp(24px, 6vw, 64px) 0 clamp(20px, 4vw, 40px); position: relative; isolation: isolate; }
.hello {
  display: inline-block; background: var(--sun); color: #3A2A00; font-weight: 700;
  border-radius: 999px; padding: 6px 16px; font-size: .95rem; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(2rem, 7vw, 3.6rem); line-height: 1.1; margin: 0 auto 14px; max-width: 16ch; }
.hero h1 .accent { color: var(--grape); }
.hero p { font-size: clamp(1.05rem, 2.6vw, 1.3rem); color: var(--soft-ink); margin: 0 auto; max-width: 38ch; }

.doodles { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: -1; }
.doodles span { position: absolute; font-size: clamp(1.6rem, 4vw, 2.6rem); opacity: .55; font-family: "Fredoka", system-ui, sans-serif; font-weight: 700; }
.doodles .d1 { top: 8%; left: 4%; color: var(--coral); }
.doodles .d2 { top: 58%; left: 9%; color: var(--sea); }
.doodles .d3 { top: 14%; right: 6%; color: var(--leaf); }
.doodles .d4 { top: 64%; right: 10%; color: var(--grape); }
.doodles .d5 { top: 2%; left: 46%; color: var(--sun); }
.hero > :not(.doodles) { position: relative; }

.choices { display: grid; grid-template-columns: 1fr; gap: 18px; margin: 8px auto 40px; max-width: 860px; }
@media (min-width: 640px) { .choices { grid-template-columns: 1fr 1fr; gap: 24px; } }
.big-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center;
  text-decoration: none; background: var(--card); border-radius: 32px; padding: clamp(24px, 5vw, 40px) 20px;
  border: 4px solid transparent; box-shadow: var(--shadow); min-height: 220px;
  transition: transform .15s ease, border-color .15s ease;
}
.big-btn:hover { transform: translateY(-4px); }
.big-btn .icon {
  width: clamp(84px, 18vw, 110px); aspect-ratio: 1; border-radius: 28px; display: grid; place-items: center;
  font-size: clamp(2.6rem, 8vw, 3.4rem);
}
.big-btn .label { font-family: "Fredoka", "Andika", system-ui, sans-serif; font-weight: 600; font-size: clamp(1.6rem, 5vw, 2.1rem); }
.big-btn .sub { color: var(--soft-ink); font-size: 1.05rem; }
.big-btn.reading .icon { background: var(--coral-bg); }
.big-btn.reading:hover, .big-btn.reading:focus-visible { border-color: var(--coral); }
.big-btn.math .icon { background: var(--sea-bg); }
.big-btn.math:hover, .big-btn.math:focus-visible { border-color: var(--sea); }

.footer { text-align: center; color: var(--soft-ink); font-size: .9rem; padding: 24px 16px 32px; }

/* Game list pages */
.page-head { padding: clamp(12px, 3vw, 28px) 0 8px; }
.page-head h1 { font-size: clamp(1.9rem, 6vw, 3rem); margin: 0 0 6px; }
.page-head p { color: var(--soft-ink); font-size: clamp(1.05rem, 2.4vw, 1.2rem); margin: 0; max-width: 60ch; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.filters button {
  font: inherit; font-weight: 700; font-size: 1rem; cursor: pointer; min-height: 44px;
  background: var(--card); color: var(--ink); border: 2px solid var(--line); border-radius: 999px; padding: 8px 16px;
}
.filters button[aria-pressed="true"] { background: var(--grape); color: var(--grape-ink); border-color: var(--grape); }

.level { margin: 26px 0 8px; }
.level-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; margin-bottom: 12px; }
.level-head h2 { font-size: clamp(1.35rem, 4vw, 1.8rem); margin: 0; }
.level-head .grade { font-weight: 700; color: var(--soft-ink); }
.level-tag {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; font-weight: 700;
  font-family: "Fredoka", system-ui, sans-serif; align-self: center;
}
.lv1 .level-tag { background: var(--leaf-bg); color: var(--leaf); }
.lv2 .level-tag { background: var(--sea-bg); color: var(--sea); }
.lv3 .level-tag { background: var(--grape-bg); color: var(--grape); }
.lv4 .level-tag { background: var(--coral-bg); color: var(--coral); }

.games { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 600px) { .games { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .games { grid-template-columns: repeat(3, 1fr); } }
.game {
  display: flex; flex-direction: column; gap: 8px; height: 100%; text-decoration: none;
  background: var(--card); border-radius: 22px; padding: 18px; border: 3px solid transparent; box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
a.game:hover, a.game:focus-visible { border-color: var(--grape); transform: translateY(-2px); }
.game .top { display: flex; align-items: center; gap: 12px; }
.game .emoji { width: 52px; height: 52px; flex: none; border-radius: 16px; display: grid; place-items: center; font-size: 1.8rem; background: var(--sky); }
.game h3 { font-size: 1.25rem; margin: 0; line-height: 1.2; }
.game p { margin: 0; color: var(--soft-ink); }
.meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 4px; }
.chip { font-size: .85rem; font-weight: 700; border-radius: 999px; padding: 3px 10px; background: var(--sky); color: var(--ink); }
.chip.skill { background: var(--grape-bg); color: var(--grape); }
.chip.stars { color: #3A2A00; background: var(--sun); }
.game.soon { opacity: .8; border-style: dashed; border-color: var(--line); box-shadow: none; }
.soon-note {
  background: var(--card); border-radius: 22px; padding: 18px 20px; margin: 18px 0 0; box-shadow: var(--shadow);
  border-left: 8px solid var(--sun);
}
.hidden { display: none !important; }

/* Reading page: one box per skill, with its games underneath */
.skill-group { margin: 28px 0 8px; }
.skill-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 14px;
  background: var(--card); border-radius: 26px; padding: 16px 20px; box-shadow: var(--shadow); border-left: 10px solid var(--sea);
}
.skill-head > div { flex: 1 1 240px; }
.skill-head h2 { font-size: clamp(1.4rem, 4vw, 1.9rem); margin: 0 0 2px; }
.skill-head p { margin: 0; color: var(--soft-ink); }
.skill-head .grade { font-weight: 700; color: var(--soft-ink); }
.skill-icon { width: 64px; height: 64px; flex: none; border-radius: 20px; display: grid; place-items: center; font-size: 2.2rem; }
.sk-letters .skill-head { border-left-color: var(--leaf); }
.sk-letters .skill-icon { background: var(--leaf-bg); }
.sk-ladders .skill-head { border-left-color: var(--sea); }
.sk-ladders .skill-icon { background: var(--sea-bg); }
.sk-fluency .skill-head { border-left-color: var(--berry); }
.sk-fluency .skill-icon { background: var(--berry-bg); }

@media (prefers-reduced-motion: reduce) {
  .big-btn, .game { transition: none; }
  .big-btn:hover, a.game:hover { transform: none; }
}