:root{--bg:#fbfbfd;--fg:#15151c;--mut:#5b5b6b;--line:#e3e3ea;--acc:#1a56c4;--acc2:#e8efff;--ok:#137333;--card:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#121218;--fg:#ececf1;--mut:#a3a3b3;--line:#2b2b38;--acc:#7aa7ff;--acc2:#1c2640;--ok:#5bbb7b;--card:#1a1a23}}
:root[data-theme="dark"]{--bg:#121218;--fg:#ececf1;--mut:#a3a3b3;--line:#2b2b38;--acc:#7aa7ff;--acc2:#1c2640;--ok:#5bbb7b;--card:#1a1a23}
*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,Segoe UI,Arial;margin:0}
main{max-width:980px;margin:0 auto;padding:28px 16px 60px}a{color:var(--acc)}
h1{font-size:28px;margin:0}h2{font-size:21px;margin:36px 0 10px}h3{font-size:17px;margin:0 0 6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 16px}
.box{background:var(--acc2);border-radius:12px;padding:18px}.btn{display:inline-block;padding:9px 16px;border-radius:8px;background:var(--acc);color:#fff;text-decoration:none;font-weight:600}
button{padding:9px 16px;border:0;border-radius:8px;background:var(--acc);color:#fff;font-weight:600;font-size:16px;cursor:pointer}
footer{color:var(--mut);font-size:13px;margin-top:48px;border-top:1px solid var(--line);padding-top:14px}

/* ===================================================================== */
/* Sleep, Decoded additions                                              */
/* ===================================================================== */

/* ---- extra tokens: warning/danger, tip, ok tint (+ dark variants) ---- */
:root{--warn:#b3261e;--warn-bg:#fdecea;--tip:#fff7dc;--tip-line:#d9a400;--ok-bg:#e6f4ea;--btn-fg:#fff;--shadow:0 6px 24px rgba(20,20,40,.14)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--warn:#ff8a80;--warn-bg:#3a1c1c;--tip:#2c2716;--tip-line:#b8902a;--ok-bg:#15301f;--btn-fg:#0d1020;--shadow:0 6px 24px rgba(0,0,0,.5)}}
:root[data-theme="dark"]{--warn:#ff8a80;--warn-bg:#3a1c1c;--tip:#2c2716;--tip-line:#b8902a;--ok-bg:#15301f;--btn-fg:#0d1020;--shadow:0 6px 24px rgba(0,0,0,.5)}

html{-webkit-text-size-adjust:100%}
body{overflow-wrap:break-word}
img,svg,video{max-width:100%;height:auto}
[hidden]{display:none!important}
.btn,button{min-height:44px;color:var(--btn-fg);line-height:1.35}
.btn{color:var(--btn-fg)}
button:disabled{opacity:.45;cursor:not-allowed}
:focus-visible{outline:3px solid var(--acc);outline-offset:2px;border-radius:4px}
a:focus-visible,button:focus-visible{box-shadow:0 0 0 5px var(--acc2)}
input,select,textarea{font:inherit;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:9px 10px;min-height:44px;max-width:100%}
textarea{width:100%;resize:vertical}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--acc);outline-offset:1px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.sd-muted{color:var(--mut)}.sd-small{font-size:14px}
table{border-collapse:collapse}

/* ---- reading layout ---- */
article{max-width:68ch}
article p,article li{max-width:68ch}
article ul,article ol{padding-left:1.4em}

/* ---- navigation ---- */
nav.top{display:flex;flex-wrap:wrap;align-items:center;gap:4px 14px;padding:4px 0 10px;border-bottom:1px solid var(--line);margin-bottom:16px}
nav.top a{display:inline-flex;align-items:center;min-height:44px;padding:0 4px;text-decoration:none;font-weight:600}
nav.top a[aria-current]{color:var(--fg);text-decoration:underline;text-underline-offset:4px}
.crumbs{font-size:14px;color:var(--mut);margin:0 0 10px;display:flex;flex-wrap:wrap;gap:0 6px;padding:0;list-style:none}
.crumbs li{display:inline-flex;align-items:center;min-height:44px}.crumbs a{display:inline-flex;align-items:center;min-height:44px;color:var(--mut)}
.crumbs li+li::before,.crumbs a+a::before{content:"/";margin-right:6px;color:var(--line)}
.pager{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:40px}
.pager a{flex:1 1 220px;display:flex;flex-direction:column;justify-content:center;min-height:56px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);text-decoration:none}
.pager a small,.pager .pager-label{color:var(--mut);font-size:13px}
.pager a[rel="next"],.pager .next{text-align:right;margin-left:auto}
.unit-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--mut);font-size:14px;margin:8px 0 18px}
.chip{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.02em;text-transform:uppercase;padding:2px 9px;border-radius:999px;background:var(--acc2);color:var(--acc);white-space:nowrap}
.chip-soon{background:var(--line);color:var(--mut)}
.chip-ok{background:var(--ok-bg);color:var(--ok)}

/* ---- sticky slim course progress bar ---- */
#course-progress{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
#course-progress .cp-link{display:flex;align-items:center;min-height:44px;max-width:980px;margin:0 auto;padding:0 16px;color:var(--mut);text-decoration:none;font-size:13px}
#course-progress .cp-text{display:flex;flex-wrap:wrap;gap:0 14px}
#course-progress .cp-text b{color:var(--fg)}
#course-progress .cp-streak{color:var(--fg)}
#course-progress .cp-track{height:4px;background:var(--line)}
#course-progress .cp-fill{display:block;height:100%;background:var(--acc);transition:width .4s ease}
.sd-notice{margin:0;padding:8px 16px;background:var(--warn-bg);color:var(--fg);font-size:14px;text-align:center}
#streak:empty{display:none}

/* ---- content boxes emitted by the build ---- */
.callout{position:relative;margin:22px 0;padding:14px 16px;border-radius:10px;border:1px solid var(--line);border-left-width:5px;background:var(--card)}
.callout>:first-child{margin-top:0}.callout>:last-child{margin-bottom:0}
.callout .callout-title,.callout>h2,.callout>h3,.callout>h4{font-size:16px;font-weight:700;margin:0 0 6px}
.callout::before{display:block;font-weight:700;font-size:13px;letter-spacing:.03em;text-transform:uppercase;margin-bottom:4px}
.callout.callout:has(>.callout-title,>h2,>h3,>h4)::before{content:none}
.callout.good-to-know{background:var(--tip);border-color:var(--tip-line)}
.callout.good-to-know::before{content:"💡 Good to know";content:"💡 Good to know"/"Good to know"}
.callout.good-to-know:has(>.callout-title,>h2,>h3,>h4){padding-left:48px}
.callout.good-to-know:has(>.callout-title,>h2,>h3,>h4)::after{content:"💡";content:"💡"/"";position:absolute;left:14px;top:13px;font-size:20px}
.callout.try-tonight{background:var(--ok-bg);border-color:var(--ok)}
.callout.try-tonight::before{content:"Try tonight";color:var(--ok)}
.callout.try-tonight ol{counter-reset:step;list-style:none;padding-left:0;margin:8px 0 0}
.callout.try-tonight ol>li{counter-increment:step;position:relative;padding-left:42px;margin:8px 0;min-height:30px}
.callout.try-tonight ol>li::before{content:counter(step);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--ok);color:var(--card);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px}
.callout.see-doctor{border:2px solid var(--warn);border-left-width:6px;background:var(--warn-bg)}
.callout.see-doctor::before{content:"When to see a doctor";color:var(--warn)}
.callout.see-doctor .callout-title,.callout.see-doctor>h2,.callout.see-doctor>h3,.callout.see-doctor>h4{color:var(--warn);font-weight:800}
.callout.see-doctor strong{color:var(--warn)}
.callout.disclaimer{background:transparent;border-left-color:var(--mut);color:var(--mut);font-size:14px}
.callout.disclaimer .callout-title,.callout.disclaimer>h3,.callout.disclaimer>h4{color:var(--fg);font-size:15px}
.callout.diagram{border:2px dashed var(--mut);border-left-width:2px;background:transparent}
.callout.diagram::before{content:"Diagram for illustration";color:var(--mut)}
.callout.diagram:has(>.diagram-label)::before{content:none}
.callout.diagram .diagram-label{display:block;font-weight:700;font-size:13px;letter-spacing:.03em;text-transform:uppercase;color:var(--mut);margin-bottom:4px}
.callout.diagram:has(>.callout-title,>h3,>h4)::before{content:"Diagram for illustration";display:block}
.callout.diagram:has(>.diagram-label)::before{content:none}
.callout.diagram svg{display:block;margin:10px auto}
.callout.guess{background:var(--acc2);border-color:var(--acc)}
.callout.guess::before{content:"Guess first";color:var(--acc)}
.callout.guess details{margin-top:8px}
.callout details>summary,.myth-fact details>summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600;color:var(--acc)}

.myth-fact{margin:18px 0;border:1px solid var(--line);border-radius:12px;background:var(--card);overflow:hidden}
.myth-fact .myth,.myth-fact .fact{padding:14px 16px}
.myth-fact .myth{background:var(--warn-bg)}
.myth-fact .myth::before{content:"Myth: ";font-weight:800;color:var(--warn)}
.myth-fact .myth:has(>strong:first-child)::before{content:none}
.myth-fact .fact{background:var(--ok-bg);border-top:1px solid var(--line)}
.myth-fact .fact::before{content:"Fact: ";font-weight:800;color:var(--ok)}
.myth-fact .fact:has(>strong:first-child)::before{content:none}
.myth-fact .myth>:last-child,.myth-fact .fact>:last-child{margin-bottom:0}
.myth-fact .source{display:block;color:var(--mut);font-size:13px;margin-top:6px}
.myth-fact .sd-reveal{margin:12px 16px}
.myth-fact.is-revealed .fact{animation:sd-fade .35s ease}
@keyframes sd-fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

.case-study{margin:22px 0;padding:16px 18px;border-radius:12px;background:var(--card);border:1px solid var(--line);border-top:4px solid var(--acc)}
.case-study::before{content:"Case study";display:block;font-weight:700;font-size:13px;letter-spacing:.03em;text-transform:uppercase;color:var(--acc);margin-bottom:4px}
.case-study.case-study:has(>.callout-title,>h2,>h3,>h4)::before{content:none}
.case-study blockquote{margin:10px 0;padding-left:12px;border-left:3px solid var(--line);color:var(--mut)}

.glossary dl{margin:0}
.glossary dt{font-weight:700;margin-top:14px}
.glossary dd{margin:2px 0 0;color:var(--fg)}
@media (min-width:720px){.glossary dl{display:grid;grid-template-columns:minmax(140px,220px) 1fr;gap:10px 18px}.glossary dt{margin:0}.glossary dd{margin:0}}

/* ===================================================================== */
/* widgets                                                               */
/* ===================================================================== */
.sd-widget{margin:24px 0}
.sd-error{margin:12px 0;padding:10px 14px;border-radius:8px;border:1px solid var(--warn);background:var(--warn-bg);color:var(--fg);font-size:14px}
.sd-error-inline{color:var(--warn);font-weight:600;margin:8px 0}
.sd-error-inline:empty{display:none}
.sd-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:12px 0}
.sd-btn-2,button.sd-btn-2{background:transparent;color:var(--acc);border:2px solid var(--acc)}
.sd-danger,button.sd-danger{color:var(--warn);border-color:var(--warn)}
.sd-bar{height:10px;border-radius:99px;background:var(--line);overflow:hidden;margin:6px 0}
.sd-bar-fill{display:block;height:100%;background:var(--acc);border-radius:99px;transition:width .4s ease}
.is-complete .sd-bar-fill{background:var(--ok)}
.sd-big{font-size:19px;margin:8px 0}
.sd-status{color:var(--mut);font-size:14px}
.sd-note{font-size:14px;color:var(--mut);border-left:3px solid var(--line);padding:4px 0 4px 12px;margin:12px 0}
.sd-source{font-size:13px;color:var(--mut)}

/* quiz + scenario */
.sd-quiz,.sd-scenario,.sd-order,.sd-flashcards,.sd-selfcheck,.sd-calculator,.sd-diary{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.sd-q-count{margin:0 0 4px;font-size:13px;color:var(--mut);font-weight:600;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.sd-q-text{font-size:18px;font-weight:600;margin:0 0 12px}
.sd-q-text:focus{outline:none}
.sd-options{display:grid;gap:10px}
.sd-opt{display:flex;flex-wrap:wrap;align-items:center;gap:10px;width:100%;text-align:left;background:var(--card);color:var(--fg);border:2px solid var(--line);font-weight:500;padding:10px 12px}
.sd-opt:hover:not(:disabled){border-color:var(--acc)}
.sd-opt:disabled{opacity:1;cursor:default}
.sd-opt-key{flex:0 0 28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--acc2);color:var(--acc);font-weight:700;font-size:14px}
.sd-opt-text{flex:1 1 180px}
.sd-opt.is-right,.sd-opt.is-best{border-color:var(--ok);background:var(--ok-bg)}
.sd-opt.is-right .sd-opt-key,.sd-opt.is-best .sd-opt-key{background:var(--ok);color:var(--card)}
.sd-opt.is-wrong{border-color:var(--warn);background:var(--warn-bg)}
.sd-opt.is-wrong .sd-opt-key{background:var(--warn);color:var(--card)}
.sd-opt.is-picked{box-shadow:0 0 0 2px var(--acc) inset}
.sd-tag{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;padding:1px 8px;border-radius:99px;background:var(--card);border:1px solid currentColor}
.sd-feedback{margin:12px 0}
.sd-feedback:empty{display:none}
.sd-feedback.is-ok,.sd-feedback.is-no{padding:10px 14px;border-radius:8px}
.sd-feedback.is-ok{background:var(--ok-bg);border-left:4px solid var(--ok)}
.sd-feedback.is-no{background:var(--warn-bg);border-left:4px solid var(--warn)}
.sd-feedback p{margin:4px 0}
.sd-score{font-size:22px;font-weight:700;margin:4px 0}
.sd-score:focus{outline:none}
.sd-pass{color:var(--ok);font-weight:700}.sd-fail{color:var(--warn);font-weight:700}
.sd-missed{padding-left:1.3em}
.sd-missed li{margin:12px 0;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sd-missed p{margin:3px 0}
.sd-scenario{display:grid;gap:14px}
.sd-scn-item{background:var(--bg)}
.sd-scn-text{margin:0 0 6px}
.sd-scn-ask{font-weight:700;margin:6px 0 10px}

/* order */
.sd-order-prompt{font-weight:600;margin:0 0 4px}
.sd-order-list{list-style:none;padding:0;margin:10px 0;display:grid;gap:8px}
.sd-order-item{display:flex;align-items:center;gap:6px;padding:4px;border:2px solid var(--line);border-radius:10px;background:var(--bg);touch-action:pan-y}
.sd-order-item.is-dragging{border-color:var(--acc);box-shadow:var(--shadow);opacity:.95}
.sd-order-item.is-right{border-color:var(--ok);background:var(--ok-bg)}
.sd-order-item.is-wrong{border-color:var(--warn);background:var(--warn-bg)}
.sd-handle{flex:0 0 36px;min-height:44px;display:flex;align-items:center;justify-content:center;cursor:grab;touch-action:none;user-select:none;color:var(--mut);font-size:20px}
.is-dragging .sd-handle{cursor:grabbing}
.sd-order-num{flex:0 0 24px;font-weight:700;color:var(--mut);text-align:center}
.sd-order-body{flex:1 1 auto;min-width:0;display:flex;flex-direction:column}
.sd-order-mark{font-size:13px;font-weight:700}
.sd-order-mark:empty{display:none}
.is-right .sd-order-mark{color:var(--ok)}.is-wrong .sd-order-mark{color:var(--warn)}
.sd-order-btns{display:flex;gap:4px;flex:0 0 auto}
.sd-mv{width:44px;padding:0;font-size:18px;background:var(--card);color:var(--acc);border:1px solid var(--line)}

/* flashcards */
.sd-fc-counts{font-weight:600;margin:0 0 10px}
.sd-fc-card{display:block;width:100%;padding:0;background:transparent;color:var(--fg);border:0;perspective:1000px;text-align:center;font-weight:500;cursor:pointer}
.sd-fc-inner{display:grid;transition:transform .5s ease;transform-style:preserve-3d}
.sd-fc-card.is-flipped .sd-fc-inner{transform:rotateY(180deg)}
.sd-fc-face{grid-area:1/1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:190px;padding:22px 18px;border-radius:14px;border:2px solid var(--line);background:var(--bg);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.sd-fc-back{transform:rotateY(180deg);background:var(--acc2);border-color:var(--acc)}
.sd-fc-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--mut)}
.sd-fc-text{font-size:19px;line-height:1.45}
.sd-fc-card:focus-visible{outline-offset:4px}
.sd-fc-done{font-size:18px;font-weight:600}
.sd-fc-done:focus{outline:none}

/* self-check */
.sd-sc-item{border:1px solid var(--line);border-radius:10px;margin:0 0 12px;padding:10px 12px 6px;background:var(--bg)}
.sd-sc-item legend{font-weight:600;padding:0 4px}
.sd-choice{display:flex;align-items:center;gap:10px;min-height:44px;padding:4px 6px;border-radius:8px;cursor:pointer}
.sd-choice:hover{background:var(--acc2)}
.sd-choice input{width:22px;height:22px;min-height:0;margin:0;flex:0 0 auto;accent-color:var(--acc)}
.sd-sc-result{margin-top:16px}
.sd-sc-result:empty{display:none}
.sd-sc-result:focus{outline:none}
.sd-table-wrap{overflow-x:auto;max-width:100%}
.sd-compare{width:100%;font-size:14px;margin:8px 0}
.sd-compare caption{text-align:left;color:var(--mut);padding-bottom:6px}
.sd-compare th,.sd-compare td{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
.sd-compare td{white-space:nowrap}
.sd-compare .sd-total th,.sd-compare .sd-total td{font-weight:700}

/* calculator + forms */
.sd-form{display:grid;gap:12px;margin-bottom:12px}
.sd-field{display:flex;flex-direction:column;gap:4px;min-width:0}
.sd-field label{font-weight:600;font-size:14px}
.sd-field input,.sd-field select{width:100%}
.sd-form button{justify-self:start}
@media (min-width:640px){.sd-form{grid-template-columns:repeat(3,1fr);align-items:end}.sd-form button{grid-column:1/-1}}
.sd-out{margin:10px 0}
.sd-out:empty{display:none}
.sd-out .sd-big strong{font-size:24px;color:var(--acc)}
.sd-disclaimer{font-size:14px;color:var(--mut);border-top:1px solid var(--line);padding-top:10px}
.sd-sources ul{margin:0;padding-left:1.2em;color:var(--mut)}
.sd-sources p{margin:6px 0 2px;color:var(--mut)}

/* diary */
.sd-privacy{background:var(--acc2);border-radius:8px;padding:10px 12px;margin:0 0 10px;font-size:14px}
.sd-toolbar{margin:0 0 14px}
.sd-days{display:grid;gap:10px}
.sd-day{padding:0;background:var(--bg)}
.sd-day>summary{cursor:pointer;min-height:48px;display:flex;flex-wrap:wrap;align-items:center;gap:0 6px;padding:8px 14px;list-style-position:inside}
.sd-day-sum{color:var(--mut);font-size:14px}
.sd-day[open]>summary{border-bottom:1px solid var(--line)}
.sd-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(135px,1fr));gap:12px;padding:14px}
.sd-f-notes,.sd-f-caffeine{grid-column:1/-1}
.sd-f-rested,.sd-f-screens,.sd-f-awakeMin{grid-column:span 2}
@media (max-width:330px){.sd-f-rested,.sd-f-screens,.sd-f-awakeMin{grid-column:1/-1}}
.sd-inline{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.sd-inline input[type=time]{flex:1 1 140px;width:auto}
.sd-check{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 6px;font-weight:500;cursor:pointer}
.sd-check input{width:22px;height:22px;min-height:0;margin:0}
.sd-day-calc{margin:0;padding:0 14px 14px;font-size:14px;font-weight:600;color:var(--acc)}
.sd-summary{margin-top:16px}
.sd-summary h3{margin-top:14px}
.sd-stats{margin:0;display:grid;gap:6px}
.sd-stats>div{display:flex;flex-wrap:wrap;gap:0 10px;border-bottom:1px solid var(--line);padding:4px 0}
.sd-stats dt{color:var(--mut);flex:1 1 200px}
.sd-stats dd{margin:0;font-weight:600;flex:1 1 200px}
.sd-chart-wrap{max-width:420px}
.sd-chart{width:100%;height:auto;display:block}
.sd-chart-bar{fill:var(--acc)}
.sd-chart-axis{stroke:var(--mut);stroke-width:1}
.sd-chart-guide{stroke:var(--ok);stroke-width:1;stroke-dasharray:4 3}
.sd-chart-lbl{fill:var(--mut);font-size:11px;font-family:system-ui,Segoe UI,Arial}
.sd-chart-val{fill:var(--fg);font-size:11px;font-weight:700;font-family:system-ui,Segoe UI,Arial}
.sd-hints li{margin:6px 0}

/* slides */
.sd-deck{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;margin:24px 0}
.sd-deck-view{touch-action:pan-y}
.sd-deck .slide{min-height:260px;padding:16px 8px;display:flex;flex-direction:column;justify-content:center}
.sd-deck .slide:focus{outline:none}
.sd-deck .slide:focus-visible{outline:3px solid var(--acc);outline-offset:-3px;border-radius:8px}
.sd-deck .slide>:first-child{margin-top:0}
.sd-deck .slide h2,.sd-deck .slide h3{margin-top:0}
.sd-deck-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;border-top:1px solid var(--line);padding-top:10px}
.sd-deck-count{flex:1 1 auto;text-align:center;font-weight:700;color:var(--mut);min-width:60px}
.sd-fs-btn{order:5}
.sd-deck-dots{display:none;flex-wrap:wrap;justify-content:center;gap:0;margin-top:6px}
@media (min-width:600px){.sd-deck-dots{display:flex}}
.sd-dot{width:32px;min-height:32px;padding:0;background:transparent;display:inline-flex;align-items:center;justify-content:center}
.sd-dot::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--line);border:1px solid var(--mut)}
.sd-dot[aria-current]::before{background:var(--acc);border-color:var(--acc)}
.sd-deck:fullscreen{background:var(--bg);padding:24px;display:flex;flex-direction:column;border:0;border-radius:0;overflow:auto}
.sd-deck:fullscreen .sd-deck-view{flex:1;display:flex;align-items:center;justify-content:center}
.sd-deck:fullscreen .slide{font-size:clamp(18px,2.4vw,30px);max-width:1100px;width:100%}
.sd-deck.sd-deck-fs{position:fixed;inset:0;z-index:1000;margin:0;border-radius:0;border:0;display:flex;flex-direction:column;overflow:auto;background:var(--bg);padding:16px}
.sd-deck.sd-deck-fs .sd-deck-view{flex:1;display:flex;align-items:center}
.sd-deck.sd-deck-fs .slide{font-size:20px;width:100%}
html.sd-noscroll,html.sd-noscroll body{overflow:hidden}

/* progress map */
.sd-pm-head{margin-bottom:16px}
.sd-pm-head .sd-big{margin-top:0}
.sd-continue{margin-top:8px}
.sd-pm-grid{display:grid;gap:14px}
@media (min-width:760px){.sd-pm-grid{grid-template-columns:1fr 1fr}}
.sd-pm-module h3{font-size:18px;margin:2px 0 4px}
.sd-pm-module h3 a{text-decoration:none}
.sd-pm-module.is-locked{opacity:.65;background:var(--bg)}
.sd-pm-module.is-complete{border-color:var(--ok)}
.sd-pm-units{list-style:none;padding:0;margin:10px 0 0}
.sd-pm-units li{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;padding:4px 0;border-top:1px solid var(--line);min-height:44px}
.sd-pm-units .sd-tick{flex:0 0 24px;height:24px;border-radius:50%;border:2px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.sd-pm-units li.is-done .sd-tick{background:var(--ok);border-color:var(--ok);color:var(--card)}
.sd-pm-title{flex:1 1 160px;min-width:0}
a.sd-pm-title{display:inline-flex;align-items:center;min-height:40px}
.sd-pm-meta{display:inline-flex;gap:8px;align-items:center}

/* badges */
.sd-badges{list-style:none;padding:0;margin:0;display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.sd-badge{display:flex;gap:12px;align-items:flex-start}
.sd-badge-emoji{font-size:34px;line-height:1}
.sd-badge-body{display:flex;flex-direction:column;gap:2px}
.sd-badge-state{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--ok)}
.sd-badge.is-earned{border-color:var(--ok)}
.sd-badge.is-locked{background:var(--bg)}
.sd-badge.is-locked .sd-badge-emoji{filter:grayscale(1);opacity:.4}
.sd-badge.is-locked .sd-badge-state{color:var(--mut)}
.sd-badge.is-locked strong{color:var(--mut)}

/* mark as read */
button[data-complete]{margin-top:28px}
button[data-complete].is-done{background:var(--ok-bg);color:var(--ok);border:2px solid var(--ok)}

/* toasts */
.sd-toasts{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:2000;display:grid;gap:8px;width:min(420px,calc(100% - 32px))}
.sd-toast{display:flex;align-items:center;gap:10px;padding:10px 8px 10px 14px;border-radius:12px;background:var(--fg);color:var(--bg);box-shadow:var(--shadow);font-weight:600;animation:sd-pop .45s cubic-bezier(.2,1.4,.4,1)}
.sd-toast>span:nth-child(2){flex:1}
.sd-toast-emoji{font-size:24px}
.sd-toast-x{background:transparent;color:inherit;min-height:44px;width:44px;padding:0;font-size:22px}
.sd-toast.is-out{opacity:0;transition:opacity .4s}
@keyframes sd-pop{from{opacity:0;transform:translateY(16px) scale(.9)}to{opacity:1;transform:none}}

/* ---- reduced motion ---- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .sd-fc-card.is-flipped .sd-fc-inner{transform:none}
  .sd-fc-face{backface-visibility:visible;-webkit-backface-visibility:visible}
  .sd-fc-back{transform:none}
  .sd-fc-card:not(.is-flipped) .sd-fc-back,.sd-fc-card.is-flipped .sd-fc-front{visibility:hidden}
}

/* ---- print (diary, sleep plan, any page) ---- */
@media print{
  :root{--bg:#fff;--fg:#000;--mut:#444;--line:#bbb;--card:#fff;--acc:#000;--acc2:#f2f2f2;--tip:#fff;--ok-bg:#fff;--warn-bg:#fff}
  body{background:#fff;color:#000;font-size:11pt}
  main{max-width:none;padding:0}
  nav,nav.top,.crumbs,.pager,#course-progress,.sd-notice,.sd-toasts,footer,button,.btn,.sd-toolbar,.sd-deck-dots,.no-print,[data-reset],[data-export]{display:none!important}
  a{color:#000;text-decoration:none}
  article{max-width:none}
  .card,.callout,.sd-diary,.sd-day,.myth-fact,.case-study,.sd-summary,.print-plan,.plan{break-inside:avoid;page-break-inside:avoid;box-shadow:none}
  .sd-diary,.sd-quiz,.sd-calculator,.sd-selfcheck{border:0;padding:0}
  .sd-day>summary{list-style:none;border-bottom:1px solid #999}
  .sd-day>summary::-webkit-details-marker{display:none}
  .sd-grid{grid-template-columns:repeat(4,1fr);gap:6px;padding:8px}
  .sd-f-rested,.sd-f-screens,.sd-f-awakeMin{grid-column:span 1}
  input,select,textarea{border:0;border-bottom:1px solid #999;border-radius:0;min-height:0;padding:2px 0;background:#fff;color:#000;appearance:none;-webkit-appearance:none}
  .sd-field label{font-size:9pt}
  .sd-chart-bar{fill:#555}
  .myth-fact .fact[hidden]{display:block!important}
  .sd-deck .slide[hidden]{display:block!important;break-inside:avoid;border-bottom:1px solid #bbb}
}