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p{font-size:12px}.toast{left:50%;bottom:17px;font-size:12px;text-align:center}footer{padding:20px 19px;font-size:9px;gap:15px}footer>span{display:none}footer button{font-size:10px}}
@media(max-width:470px){.hero h1{font-size:42px;letter-spacing:-1.6px}.hero{padding:28px 23px}.hero p{font-size:13px}.hero .button-row{display:block}.hero .hero-link{display:inline-block;margin-top:18px}.hero .eyebrow{font-size:7px;letter-spacing:1px}.stats-row>div{padding-left:7px;gap:7px}.stats-row b{font-size:23px}.stats-row b small{font-size:10px}.stats-row span{font-size:9px}.stats-row svg{width:17px}.right-rail{grid-template-columns:1fr}.quiet-note{grid-column:auto}.review-promo,.warm-card{padding:25px}.review-promo h2{font-size:34px}.review-promo .button{font-size:12px}.review-promo>p{font-size:13px}.warm-card h3{font-size:28px}.warm-card p{font-size:13px}.warm-card .text-link{font-size:12px}.principle-grid{grid-template-columns:1fr;gap:18px}.principle-grid>div{display:grid;grid-template-columns:45px 1fr;column-gap:12px;border-bottom:1px solid var(--line,#e0e9d5);padding-bottom:16px}.principle-grid>div:last-child{border:0}.principle-grid b{grid-row:1/3;font-size:30px}.principle-grid span{font-size:12px}.principle-grid p{margin-top:5px;font-size:11px}.route-intro{grid-template-columns:1fr;gap:17px}.route-intro>div{border:0!important;padding-left:8px}.route-intro span{font-size:11px}.route-intro b{font-size:13px}.module-facts{display:block}.module-facts>div{font-size:12px}.module-facts>div:nth-last-child(2){border-bottom:1px solid var(--line)}.learning-steps{flex-wrap:wrap;gap:8px 15px}.learning-steps>span{font-size:10px}.lesson-meta{font-size:10px}.toolbar{display:block}.toolbar>label{max-width:none!important;margin-bottom:16px}.toolbar>span{display:block;font-size:12px}.form-grid{grid-template-columns:1fr;gap:0}.form-footer .button{font-size:11px}.page-heading h1{font-size:31px}.task-row>.task-estimate{display:none}.lesson-heading h1{font-size:30px}.prose h2{font-size:24px}.prose p{font-size:16px}.flashcard h2{font-size:23px}.session-header{align-items:flex-start;gap:10px}.session-header>span{text-align:right;max-width:150px}.coverage-list summary small{width:100%;margin-left:28px}.coverage-list summary{gap:10px}.archive-sprint>div{flex-basis:100%}.archive-sprint>strong{font-size:24px}.source-grid a{overflow-wrap:anywhere}.panel{padding:22px 18px}.sprint-metrics{gap:18px 10px}.sprint-metrics b{font-size:22px}.sprint-metrics span{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.sidebar,.topbar,.lesson-toc,footer,.lesson-end,.notes-section,.back-link,.icon-btn,.lesson-assessment,.recall-section,.toast,.learning-steps,.next-lesson{display:none!important}.workspace{margin:0}main{padding:0}body,main{background:var(--paper,#fff)}.lesson-layout{display:block;max-width:none}.prose p{font-size:12pt;color:var(--ink,#222)}.prose h2{font-size:18pt}.code-block{background:#f4f4f4;border-color:#ddd;break-inside:avoid}.code-block code{color:#222}.code-block button{display:none}.callout,.related{break-inside:avoid}.lesson-heading h1{font-size:28pt}.lesson-sources a{font-size:10pt}}
/* Native file inputs stay accessible without covering neighbouring controls. */
.file-label{position:relative;overflow:hidden}
.file-label input[type=file]{position:absolute;left:0;top:0;width:1px!important;height:1px!important;padding:0!important;margin:0!important;border:0;clip-path:inset(50%);opacity:0}

/* Local profile selection */
button.profile{width:calc(100% + 40px);background:transparent;color:inherit;border:0;border-top:1px solid #324333;text-align:left;cursor:pointer;font-family:inherit}
button.profile>svg{margin-left:auto;flex-shrink:0}
button.profile:hover{background:#293a30}
.profile-switch{display:flex;align-items:center;gap:8px;border:1px solid var(--border,var(--line,#dce1d6));background:var(--paper,#fff);border-radius:24px;padding:5px 9px 5px 5px;cursor:pointer;color:var(--ink,#243c2d);font:inherit;font-size:13px}
.profile-switch .avatar{width:27px;height:27px;background:#d5efb2;color:#243c2d}
.profile-switch:hover{border-color:var(--strong-line,#719252)}
.profile-gate .sidebar,.profile-gate .topbar,.profile-gate footer{display:none}
.profile-gate .workspace{margin-left:0}
.profile-gate #main{min-height:100vh;display:grid;place-items:center;padding:28px}
.profile-welcome{width:min(100%,640px);padding:42px;background:var(--paper,#fff);border:1px solid var(--line,#e0e5da);border-radius:24px;box-shadow:0 20px 80px #203c2810}
.welcome-brand{display:flex;align-items:center;gap:5px;font-size:25px;color:var(--ink,#243c2d);margin-bottom:46px;text-decoration:none}
.welcome-brand svg{margin-right:7px}
.profile-welcome h1,.profile-picker h1{font-size:clamp(28px,4vw,38px);letter-spacing:-1px;margin:12px 0 14px;line-height:1.2}
.profile-welcome>p,.profile-picker>p{color:var(--muted,#64725f);line-height:1.7}
.profile-choices{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:28px 0}
.profile-choice{display:flex;flex-direction:column;align-items:flex-start;padding:25px;border:1px solid var(--line,#dce3d4);border-radius:16px;background:var(--surface-soft,#fafcf7);cursor:pointer;text-align:left;font:inherit;color:var(--ink,#203a28);transition:background .15s,border-color .15s}
.profile-choice:hover,.profile-choice.selected{background:var(--surface-accent,#edf6e4);border-color:var(--strong-line,#87a36a)}
.profile-portrait{display:grid;place-items:center;width:62px;height:62px;border-radius:20px;background:var(--surface-accent,#d7ecbc);font-size:28px;font-weight:700;margin-bottom:20px}
.profile-portrait.haki{background:var(--warm,#f0e5cd);color:var(--warning-ink,#655339)}
.profile-choice strong{font-size:25px;margin-bottom:10px}
.profile-choice>span:last-child{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted,#63715d)}
.profile-help{font-size:12px!important;line-height:1.7!important;color:var(--muted,#6d7868)!important}
.profile-picker{padding:12px 5px}
@media(max-width:720px){.header-actions{gap:9px}.profile-switch{gap:5px}.profile-switch>svg{display:none}.profile-welcome{padding:28px 22px}.profile-gate #main{padding:18px}.profile-choice{padding:20px 15px}.profile-choices{gap:10px}.welcome-brand{margin-bottom:32px}.profile-choice>span:last-child{font-size:10px}}


/* Home-server persistence status does not replace an active editor. */
#sync-notice:not(:empty){padding:14px 40px 0}#sync-notice .notice{margin:0;flex-wrap:wrap}#sync-notice .notice p{flex:1;min-width:180px}@media(max-width:720px){#sync-notice:not(:empty){padding:12px 18px 0}}
/* Small, optional steps keep the existing reading layout usable on phones. */
.start-choice{margin:24px 0;display:flex;align-items:center;justify-content:space-between;gap:24px}.start-choice p{max-width:620px}.learning-entry{margin:24px 0}.learning-entry li,.answer-guide li{margin:10px 0;line-height:1.65}.term-guide{margin:20px 0}.term-guide summary,.deeper-section summary,.guided-exercise summary,.answer-guide summary{cursor:pointer;font-weight:650;line-height:1.55;padding:12px 0}.term-guide dl{margin:12px 0}.term-guide dt{font-weight:700;margin-top:16px}.term-guide dd{margin:5px 0 0;line-height:1.65;color:var(--muted,var(--muted,#7d8c9e))}.deeper-section{border-top:1px solid var(--border,var(--line,#dbe2e8));margin:18px 0}.deeper-section .prose{padding:8px 0}.guided-exercise{margin:28px 0}.guided-exercise details{border-top:1px solid var(--border,var(--line,#dbe2e8))}.guided-exercise p,.learning-entry p{line-height:1.75}.guided-exercise pre,.expected-output pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.7}.guided-exercise pre{padding:16px;background:var(--surface-soft,#f3f5f7);border-radius:10px;color:var(--ink,#213547)}.expected-output{padding:18px 22px;border-left:3px solid var(--strong-line,#429c76);background:var(--surface-soft,#f1f8f3);margin:0 0 24px;border-radius:0 10px 10px 0}.expected-output pre{margin:10px 0;color:var(--ink,#213547)}.answer-guide{margin:16px 0}.start-choice .button-row{flex-shrink:0;flex-wrap:wrap}.deeper-section[open]>summary{color:var(--accent,var(--accent,#398568))}
@media(max-width:900px){.start-choice{align-items:flex-start;flex-direction:column}.start-choice .button-row{width:100%}.start-choice .button{white-space:normal}.guided-exercise pre{font-size:12px}}
/* Learning ranks: original medals, saved-progress comparison, no runtime assets. */
.sidebar{overflow-y:auto}
.rank-medal{object-fit:contain;flex-shrink:0;display:block;filter:drop-shadow(0 6px 12px #0002)}
.side-rank{display:flex;align-items:center;gap:10px;text-decoration:none;color:#edf4db;padding:12px 0 18px;border-bottom:1px solid #40513e;margin-bottom:18px}.side-rank>span{display:flex;flex-direction:column;gap:3px}.side-rank small{font-size:8px;letter-spacing:1px;color:#b7c4ab}.side-rank b{font-size:14px}.side-rank>strong{margin-left:auto;font-size:12px;text-align:right;white-space:nowrap}.side-rank>strong small{display:block;margin-top:3px}.side-rank .rank-stars{font-size:10px;gap:1px}
.rank-stars{display:inline-flex;gap:4px;color:#69705c;font-size:15px;line-height:1.3;white-space:nowrap}.rank-stars .filled{color:#e7bc5c;text-shadow:0 1px 3px #0004}
.rank-hero{position:relative;display:flex;align-items:center;gap:36px;padding:34px 42px;background:radial-gradient(ellipse at 15% 20%,#466251 0,transparent 58%),#192f29;color:#fff;border:1px solid #435b47;border-radius:20px;margin:24px 0 32px;overflow:hidden}.rank-emblem{flex-shrink:0;display:flex;align-items:center;flex-direction:column;gap:8px}.rank-hero-body{min-width:0;flex:1}.rank-hero .kicker{color:#c5d4b6;font-size:10px}.rank-heading{display:flex;align-items:baseline;gap:20px;justify-content:space-between;margin:7px 0}.rank-heading h2{font-size:40px;letter-spacing:-1px;margin:0;line-height:1.2;color:#fff}.rank-heading>b{font-size:25px;white-space:nowrap;font-variant-numeric:tabular-nums}.rank-heading>b small{font-size:12px;color:#d2dfc8}.rank-hero-body>p{color:#e0e7d7;font-size:14px;line-height:1.7;margin:12px 0 20px}.rank-track{height:9px;background:#ffffff24;border-radius:20px;overflow:hidden;min-width:70px}.rank-track>i{display:block;height:100%;border-radius:inherit;transition:width .55s ease;min-width:0}.rank-caption{display:flex;justify-content:space-between;font-size:10px;color:#c7d2c1;margin-top:8px}.rank-evidence{display:flex;gap:20px;flex-wrap:wrap;margin-top:24px;font-size:11px;color:#c4d3bc}.rank-evidence b{color:#fff;font-size:15px;margin-right:4px}.rank-hero.compact{gap:26px;padding:24px 30px}.rank-hero.compact .rank-heading h2{font-size:30px}.rank-hero .text-link{color:#d9f4a6;display:inline-block;margin-top:18px;font-size:12px}.rank-hero.compact .rank-hero-body>p{margin:8px 0 13px}
.rank-ladder{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:22px 0 32px}.rank-tier{display:flex;align-items:center;text-align:center;flex-direction:column;border:1px solid var(--line,#e0e5da);background:var(--paper,#fff);border-radius:16px;padding:19px 10px;gap:8px}.rank-tier.current{border:2px solid var(--strong-line,#6b9255);background:var(--surface-soft,#f0f7e9);box-shadow:0 6px 22px #66884d1c}.rank-tier>span{font-size:12px;color:var(--muted,#626f5a)}.rank-tier>small{font-size:10px;color:var(--muted,#65795c)}.rank-tier.locked .rank-medal{filter:grayscale(.65);opacity:.65}.rank-tier.locked>small{color:var(--muted,#74816c)}
.ranks-board{margin:30px 0}.leaderboard{width:100%;border-collapse:collapse;min-width:590px;font-size:14px}.leaderboard th{text-align:left;font-size:11px;font-weight:600;color:var(--muted,#62735c);border-bottom:1px solid var(--line,#dfe7d7);padding:14px 13px}.leaderboard td{padding:18px 13px;border-bottom:1px solid var(--line,#e3e9dd)}.leaderboard td>small{font-size:11px;color:var(--muted,#6b7b63)}.rank-place{font-size:22px;font-weight:700;width:50px}.leader-person{display:flex;gap:13px;align-items:center}.leader-person>span{display:flex;flex-direction:column;gap:4px}.leader-person b{font-size:16px}.leader-person b>small{font-size:9px;font-weight:500;border-radius:12px;background:var(--surface-accent,#dfeecf);color:var(--accent,#3d6230);padding:3px 6px}.leader-person>span>span:not(.rank-stars){font-size:11px;color:var(--muted,#607456)}.leader-person .rank-stars{font-size:10px;gap:1px}.leaderboard .rank-track{height:5px;background:#e6eddf;margin-top:10px;max-width:145px}.leaderboard .leader-you td{background:var(--surface-soft,#f5f9ef)}.leaderboard .leader-you td:first-child{border-radius:12px 0 0 12px}.leaderboard .leader-you td:last-child{border-radius:0 12px 12px 0}.ranks-board>.small{margin-top:15px}.xp-rules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:24px 0}.xp-rules b{font-size:23px;color:var(--accent,#4f773e)}.xp-rules h3{font-size:15px;margin:12px 0}.xp-rules p,.rank-rules details p{font-size:13px;line-height:1.8;color:var(--muted,#5e7057)}.rank-rules summary{cursor:pointer;padding:15px 0;font-weight:600}.rank-rules details{border-top:1px solid var(--line,#e0e7d8);margin-top:20px}
@media(max-width:900px){.rank-hero{gap:22px;padding:28px}.rank-heading h2{font-size:34px}.rank-heading>b{font-size:20px}.rank-evidence{gap:12px}.rank-ladder{gap:10px}.xp-rules{gap:16px}.xp-rules b{font-size:20px}}
@media(max-width:600px){.rank-hero,.rank-hero.compact{gap:14px;padding:23px 18px;align-items:flex-start}.rank-emblem .rank-medal{width:82px;height:90px}.rank-emblem .rank-stars{font-size:11px;gap:1px}.rank-heading{align-items:flex-start;flex-direction:column;gap:8px}.rank-heading h2,.rank-hero.compact .rank-heading h2{font-size:27px}.rank-heading>b{font-size:21px}.rank-hero .kicker{font-size:8px}.rank-hero-body>p{font-size:11px;margin:11px 0 14px}.rank-caption{font-size:9px}.rank-evidence{flex-direction:column;gap:7px;margin-top:18px}.rank-ladder{grid-template-columns:repeat(2,minmax(0,1fr))}.rank-tier{padding:17px 8px}.xp-rules{grid-template-columns:1fr;gap:18px}.xp-rules>div+div{padding-top:18px;border-top:1px solid var(--line,#e1e8d9)}.xp-rules h3{margin:8px 0}.ranks-board .section-head{align-items:flex-start;gap:12px;flex-wrap:wrap}.ranks-board .button{font-size:11px;padding:10px 13px}.rank-hero .text-link{font-size:11px}}
@media(prefers-reduced-motion:reduce){.rank-track>i{transition:none}}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}

.leader-mini-evidence{display:none}
@media(max-width:600px){.leaderboard{min-width:0;table-layout:auto;font-size:12px}.leaderboard th,.leaderboard td{padding:13px 5px}.leaderboard th{font-size:9px}.leaderboard th:nth-child(4),.leaderboard th:nth-child(5),.leaderboard td:nth-child(4),.leaderboard td:nth-child(5){display:none}.leaderboard .rank-place{width:25px;font-size:17px}.leader-person{gap:6px}.leader-person>.rank-medal{width:34px;height:38px}.leader-person b{font-size:13px}.leader-person b>small{font-size:8px;padding:2px 4px}.leader-person .rank-stars{font-size:9px}.leader-mini-evidence{display:block;font-size:9px;line-height:1.6;color:var(--muted,#607456)}.leaderboard td:nth-child(3)>b{font-size:12px;white-space:nowrap}.leaderboard .rank-track{min-width:55px;max-width:85px}.rank-ladder .rank-tier b{font-size:14px}}

/* Dark palette shares layout and semantic colours with the original light theme. */
:root{color-scheme:light}
:root[data-theme="dark"]{color-scheme:dark;--canvas:#131e19;--paper:#1b2923;--ink:#e4ecdf;--muted:#b0c0ad;--line:#354b3c;--green:#b9d995;--warm:#332e24;--surface-soft:#22342a;--surface-accent:#2c412d;--accent:#b9d995;--warning-ink:#e0bd83;--warm-line:#665339;--strong-line:#718d61;--border:#354b3c}
:root[data-theme="dark"] .bar{background:#354b3c}
:root[data-theme="dark"] .leaderboard .rank-track{background:#354b3c}
:root[data-theme="dark"] .term-guide dd{color:var(--muted)}
:root[data-theme="dark"] .guided-exercise pre,:root[data-theme="dark"] .expected-output pre{color:var(--ink)}
.theme-toggle{font-size:21px;line-height:1}
.theme-sun{display:none}
[data-theme="dark"] .theme-sun{display:inline}
[data-theme="dark"] .theme-moon{display:none}
.theme-options{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0 26px}
.theme-options [aria-pressed="true"]{background:var(--surface-accent,#eaf2df);border-color:var(--strong-line,#6d8a50);color:var(--ink)}
.appearance-settings p,.password-settings p{font-size:12px;color:var(--muted);line-height:1.8}
.password-settings{border-top:1px solid var(--line);margin-top:26px;padding-top:2px}
.password-settings .form-grid{gap:16px}
.password-settings form{margin-top:20px}
.password-settings .form-error{color:var(--warning-ink,#98522f)}
.password-settings .form-success{color:var(--accent,#476d32)}
.password-settings #password-result:empty{display:none}
.welcome-theme{display:flex;justify-content:flex-end;margin-bottom:12px}
@media(max-width:720px){.header-actions{gap:7px}.breadcrumbs{min-width:0}.breadcrumbs>b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-actions .profile-switch{font-size:11px}.password-settings .form-grid{grid-template-columns:1fr;gap:0}}
@media print{.theme-toggle{display:none}}

:root[data-theme="dark"] .topbar{background:var(--paper)}
:root[data-theme="dark"] .hero-slash{color:#374f35}