/* Fluo — site style. Same brand as the videos: Seyès paper, ink outlines, sticker cards, highlighter. */
@font-face { font-family: 'Fredoka'; src: url('fonts/Fredoka.ttf') format('truetype'); font-weight: 300 700; font-display: swap; }
@font-face { font-family: 'Nunito'; src: url('fonts/Nunito.ttf') format('truetype'); font-weight: 200 1000; font-display: swap; }

:root {
  --paper: #FFF6E5; --ink: #1B1B2F; --tomato: #FF5A36; --cobalt: #2D5BFF; --sun: #FFC93C; --mint: #19C39C;
  --fluo: rgba(255, 226, 64, .75); --line: rgba(120, 128, 220, .13); --line-fine: rgba(120, 128, 220, .05); --margin: rgba(255, 90, 54, .30);
  --radius: 16px; --shadow: 3px 3px 0 var(--ink); --border: 2px solid var(--ink); --text: #2B2B3F;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--text); font: 400 18px/1.7 'Nunito', system-ui, sans-serif;
  background-color: var(--paper);
  background-image:
    linear-gradient(90deg, transparent 38px, var(--margin) 38px, var(--margin) 40px, transparent 40px),
    linear-gradient(var(--line) 2px, transparent 2px),
    linear-gradient(90deg, var(--line) 2px, transparent 2px),
    linear-gradient(var(--line-fine) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px, 8px 8px;
  background-attachment: fixed;
}
a { color: var(--cobalt); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px 48px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0 6px; }
.logo { font: 700 34px/1 'Fredoka', sans-serif; color: var(--ink); text-decoration: none; position: relative; padding: 0 6px; }
.logo::before { content: ''; position: absolute; inset: 22% -4px 18% -4px; background: var(--fluo); transform: rotate(-2deg); z-index: -1; border-radius: 3px; }
.logo { isolation: isolate; }
.chip { display: inline-block; font: 700 12.5px/1 'Nunito'; letter-spacing: .06em; text-transform: uppercase; padding: 7px 12px; border: 2px solid var(--ink); border-radius: 99px; background: #fff; box-shadow: 2px 2px 0 var(--ink); }
.chip.cobalt { background: var(--cobalt); color: #fff; } .chip.tomato { background: var(--tomato); color: #fff; } .chip.sun { background: var(--sun); }

/* type */
h1, h2, h3 { font-family: 'Fredoka', sans-serif; font-weight: 600; line-height: 1.2; margin: 0 0 .5em; color: var(--ink); }
b, strong { font-weight: 700; }
h1 { font-size: clamp(32px, 8vw, 50px); margin-top: .5em; }
h2 { font-size: clamp(24px, 5.5vw, 32px); margin-top: 1.4em; }
h3 { font-size: 22px; }
p { margin: 0 0 1em; }
.hl { background: linear-gradient(175deg, transparent 12%, var(--fluo) 12%, var(--fluo) 88%, transparent 88%); padding: 0 .18em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.num { color: var(--tomato); font-weight: 700; }
.lead { font-size: 19.5px; line-height: 1.65; }

/* cards */
.card { background: #fff; border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin: 18px 0; }
.card.sun { background: #FFF3C4; } .card.tilt { transform: rotate(-.6deg); }
.note { position: relative; background: #fff; border: var(--border); border-radius: 14px; box-shadow: 4px 4px 0 var(--ink); padding: 34px 20px 18px; margin: 34px 0 22px; }
.note::before, .note::after { content: ''; position: absolute; top: -12px; width: 90px; height: 26px; background: rgba(255, 201, 60, .75); }
.note::before { left: 18px; transform: rotate(-8deg); } .note::after { right: 18px; transform: rotate(8deg); }
.note .chip { position: absolute; top: -18px; left: 50%; transform: translateX(-50%) rotate(1deg); }
.note .big { font: 600 clamp(24px, 6vw, 32px)/1.3 'Fredoka'; color: var(--ink); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 17px/1 'Fredoka'; padding: 13px 20px; border: var(--border); border-radius: 99px; background: var(--tomato); color: #fff; box-shadow: 3px 3px 0 var(--ink); text-decoration: none; cursor: pointer; transition: transform .08s, box-shadow .08s; }
.btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--ink); }
.btn.cobalt { background: var(--cobalt); } .btn.ghost { background: #fff; color: var(--ink); } .btn.mint { background: var(--mint); color: var(--ink); }
.btn:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 3px; }

/* lesson list (home) */
.lessons { display: grid; gap: 16px; padding: 0; list-style: none; }
.lessons a { display: grid; grid-template-columns: 56px 1fr; gap: 14px; align-items: start; color: var(--ink); text-decoration: none; }
.lessons .n { width: 52px; height: 52px; display: grid; place-items: center; font: 600 24px 'Fredoka'; border: var(--border); border-radius: 50%; background: var(--sun); box-shadow: 2px 2px 0 var(--ink); }
.lessons li:nth-child(2) .n { background: var(--mint); } .lessons li:nth-child(3) .n { background: var(--cobalt); color: #fff; } .lessons li:nth-child(4) .n { background: var(--tomato); color: #fff; }
.lessons h3 { margin: 0; } .lessons p { margin: 2px 0 0; font-size: 16px; opacity: .75; line-height: 1.5; }

/* lesson nav */
.steps { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 0; }
.steps a { width: 38px; height: 38px; display: grid; place-items: center; font: 600 17px 'Fredoka'; border: 2px solid var(--ink); border-radius: 50%; background: #fff; color: var(--ink); text-decoration: none; }
.steps a[aria-current] { background: var(--ink); color: #fff; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; flex-wrap: wrap; }

/* widgets */
.widget { background: #fff; border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin: 22px 0; }
.widget .label { font: 700 12.5px/1.3 'Nunito'; letter-spacing: .08em; text-transform: uppercase; opacity: .6; margin-bottom: 12px; }
.widget output, .widget .out { font-family: 'Fredoka'; font-weight: 500; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.grid100 { display: grid; grid-template-columns: repeat(10, 1fr); gap: 4px; max-width: 420px; margin: 8px auto 14px; touch-action: none; }
.grid100 span { aspect-ratio: 1; border-radius: 5px; border: 1.5px solid rgba(27, 27, 47, .25); background: #FFF9EE; transition: background .12s, transform .12s; }
.grid100 span.on { background: var(--tomato); border-color: rgba(27,27,47,.6); transform: scale(1.04); }
.grid100.cobalt span.on { background: var(--cobalt); }
input[type=range] { width: 100%; accent-color: var(--tomato); height: 32px; }
input[type=number] { font: 500 21px 'Fredoka'; width: 120px; padding: 8px 10px; border: var(--border); border-radius: 12px; background: #FFF9EE; color: var(--ink); }
.eq { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; font: 500 clamp(20px, 5.5vw, 26px) 'Fredoka'; }
.eq .tag { padding: 5px 13px; border: var(--border); border-radius: 12px; box-shadow: 2px 2px 0 var(--ink); background: #fff; }
.eq .tag.t { background: var(--tomato); color: #fff; } .eq .tag.c { background: var(--cobalt); color: #fff; } .eq .tag.m { background: var(--mint); } .eq .tag.s { background: var(--sun); }
.small { font-size: 15px; opacity: .75; }
.steps-calc { font: 400 18px/1.7 'Nunito'; margin: 10px 0 0; padding-left: 0; list-style: none; }
.steps-calc li::before { content: '→ '; color: var(--tomato); font-weight: 900; }
.bar { position: relative; height: 46px; border: var(--border); border-radius: 12px; background: #FFF9EE; overflow: hidden; margin: 10px 0; }
.bar > i { position: absolute; top: 0; bottom: 0; left: 0; background: var(--cobalt); transition: width .25s; }
.bar > b { position: absolute; top: 0; bottom: 0; background: repeating-linear-gradient(45deg, var(--tomato) 0 8px, #ff7a5c 8px 16px); transition: left .25s, width .25s; }
.bar > em { position: absolute; inset: 0; display: grid; place-items: center; font: 500 19px 'Fredoka'; font-style: normal; color: var(--ink); text-shadow: 0 0 6px #fff, 0 0 2px #fff; }
.seg { display: inline-flex; border: var(--border); border-radius: 99px; overflow: hidden; box-shadow: 3px 3px 0 var(--ink); }
.seg button { font: 500 16px 'Fredoka'; border: 0; padding: 10px 16px; background: #fff; color: var(--ink); cursor: pointer; }
.seg button[aria-pressed=true] { background: var(--ink); color: #fff; }
.path { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; font: 500 clamp(20px, 5.5vw, 26px) 'Fredoka'; margin: 12px 0; }
.path .arrow { font-size: 15px; font-family: 'Nunito'; font-weight: 700; color: var(--cobalt); text-align: center; line-height: 1.1; }
.verdict { text-align: center; font: 500 20px 'Fredoka'; padding: 10px; border-radius: 12px; }
.verdict.bad { background: #FFE1D8; } .verdict.good { background: #D5F5EC; }
.presets { display: flex; gap: 8px; flex-wrap: wrap; }
.presets button { font: 500 15px 'Fredoka'; padding: 8px 12px; border: 2px solid var(--ink); border-radius: 99px; background: #fff; cursor: pointer; }

/* QCM */
.qcm { counter-reset: q; }
.q { background: #fff; border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin: 18px 0; }
.q h3 { font-size: 19px; font-weight: 500; line-height: 1.35; display: flex; gap: 10px; }
.q h3::before { counter-increment: q; content: counter(q); flex: none; width: 30px; height: 30px; display: grid; place-items: center; font-size: 15px; font-weight: 600; border-radius: 50%; background: var(--sun); border: 2px solid var(--ink); }
.opts { display: grid; gap: 10px; }
.opts button { text-align: left; font: 500 17px/1.4 'Nunito'; padding: 12px 14px; border: 2px solid var(--ink); border-radius: 12px; background: #FFF9EE; color: var(--ink); cursor: pointer; }
.opts button:disabled { cursor: default; }
.opts button.right { background: var(--mint); } .opts button.wrong { background: #FF9A82; text-decoration: line-through; }
.expl { display: none; margin-top: 12px; padding: 10px 12px; line-height: 1.55; border-left: 5px solid var(--cobalt); background: #EEF2FF; border-radius: 6px; font-size: 16px; }
.q.done .expl { display: block; }
.score { position: sticky; bottom: 12px; z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 10px; background: var(--ink); color: #fff; border-radius: 99px; padding: 10px 18px; font: 500 17px 'Fredoka'; box-shadow: 0 6px 20px rgba(0,0,0,.2); }
.result { text-align: center; }
.result .big { font: 600 52px/1 'Fredoka'; }

/* download */
.dl { display: flex; align-items: center; gap: 14px; }
.dl .icon { flex: none; width: 54px; height: 64px; border: var(--border); border-radius: 8px; background: #fff; display: grid; place-items: center; font: 700 13px 'Nunito'; box-shadow: 2px 2px 0 var(--ink); }

footer { margin-top: 40px; padding-top: 16px; border-top: 2px dashed rgba(27,27,47,.25); font-size: 15px; opacity: .85; }
footer a { color: var(--ink); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }