/*!
 * Bootstrap Reboot v5.3.8 (https://getbootstrap.com/)
 * Copyright 2011-2025 The Bootstrap Authors
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 */:root,[data-bs-theme=light]{--bs-blue:#0d6efd;--bs-indigo:#6610f2;--bs-purple:#6f42c1;--bs-pink:#d63384;--bs-red:#dc3545;--bs-orange:#fd7e14;--bs-yellow:#ffc107;--bs-green:#198754;--bs-teal:#20c997;--bs-cyan:#0dcaf0;--bs-black:#000;--bs-white:#fff;--bs-gray:#6c757d;--bs-gray-dark:#343a40;--bs-gray-100:#f8f9fa;--bs-gray-200:#e9ecef;--bs-gray-300:#dee2e6;--bs-gray-400:#ced4da;--bs-gray-500:#adb5bd;--bs-gray-600:#6c757d;--bs-gray-700:#495057;--bs-gray-800:#343a40;--bs-gray-900:#212529;--bs-primary:#0d6efd;--bs-secondary:#6c757d;--bs-success:#198754;--bs-info:#0dcaf0;--bs-warning:#ffc107;--bs-danger:#dc3545;--bs-light:#f8f9fa;--bs-dark:#212529;--bs-primary-rgb:13,110,253;--bs-secondary-rgb:108,117,125;--bs-success-rgb:25,135,84;--bs-info-rgb:13,202,240;--bs-warning-rgb:255,193,7;--bs-danger-rgb:220,53,69;--bs-light-rgb:248,249,250;--bs-dark-rgb:33,37,41;--bs-primary-text-emphasis:#052c65;--bs-secondary-text-emphasis:#2b2f32;--bs-success-text-emphasis:#0a3622;--bs-info-text-emphasis:#055160;--bs-warning-text-emphasis:#664d03;--bs-danger-text-emphasis:#58151c;--bs-light-text-emphasis:#495057;--bs-dark-text-emphasis:#495057;--bs-primary-bg-subtle:#cfe2ff;--bs-secondary-bg-subtle:#e2e3e5;--bs-success-bg-subtle:#d1e7dd;--bs-info-bg-subtle:#cff4fc;--bs-warning-bg-subtle:#fff3cd;--bs-danger-bg-subtle:#f8d7da;--bs-light-bg-subtle:#fcfcfd;--bs-dark-bg-subtle:#ced4da;--bs-primary-border-subtle:#9ec5fe;--bs-secondary-border-subtle:#c4c8cb;--bs-success-border-subtle:#a3cfbb;--bs-info-border-subtle:#9eeaf9;--bs-warning-border-subtle:#ffe69c;--bs-danger-border-subtle:#f1aeb5;--bs-light-border-subtle:#e9ecef;--bs-dark-border-subtle:#adb5bd;--bs-white-rgb:255,255,255;--bs-black-rgb:0,0,0;--bs-font-sans-serif:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue","Noto Sans","Liberation Sans",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";--bs-font-monospace:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--bs-gradient:linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));--bs-body-font-family:var(--bs-font-sans-serif);--bs-body-font-size:1rem;--bs-body-font-weight:400;--bs-body-line-height:1.5;--bs-body-color:#212529;--bs-body-color-rgb:33,37,41;--bs-body-bg:#fff;--bs-body-bg-rgb:255,255,255;--bs-emphasis-color:#000;--bs-emphasis-color-rgb:0,0,0;--bs-secondary-color:rgba(33, 37, 41, 0.75);--bs-secondary-color-rgb:33,37,41;--bs-secondary-bg:#e9ecef;--bs-secondary-bg-rgb:233,236,239;--bs-tertiary-color:rgba(33, 37, 41, 0.5);--bs-tertiary-color-rgb:33,37,41;--bs-tertiary-bg:#f8f9fa;--bs-tertiary-bg-rgb:248,249,250;--bs-heading-color:inherit;--bs-link-color:#0d6efd;--bs-link-color-rgb:13,110,253;--bs-link-decoration:underline;--bs-link-hover-color:#0a58ca;--bs-link-hover-color-rgb:10,88,202;--bs-code-color:#d63384;--bs-highlight-color:#212529;--bs-highlight-bg:#fff3cd;--bs-border-width:1px;--bs-border-style:solid;--bs-border-color:#dee2e6;--bs-border-color-translucent:rgba(0, 0, 0, 0.175);--bs-border-radius:0.375rem;--bs-border-radius-sm:0.25rem;--bs-border-radius-lg:0.5rem;--bs-border-radius-xl:1rem;--bs-border-radius-xxl:2rem;--bs-border-radius-2xl:var(--bs-border-radius-xxl);--bs-border-radius-pill:50rem;--bs-box-shadow:0 0.5rem 1rem rgba(0, 0, 0, 0.15);--bs-box-shadow-sm:0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);--bs-box-shadow-lg:0 1rem 3rem rgba(0, 0, 0, 0.175);--bs-box-shadow-inset:inset 0 1px 2px rgba(0, 0, 0, 0.075);--bs-focus-ring-width:0.25rem;--bs-focus-ring-opacity:0.25;--bs-focus-ring-color:rgba(13, 110, 253, 0.25);--bs-form-valid-color:#198754;--bs-form-valid-border-color:#198754;--bs-form-invalid-color:#dc3545;--bs-form-invalid-border-color:#dc3545}[data-bs-theme=dark]{color-scheme:dark;--bs-body-color:#dee2e6;--bs-body-color-rgb:222,226,230;--bs-body-bg:#212529;--bs-body-bg-rgb:33,37,41;--bs-emphasis-color:#fff;--bs-emphasis-color-rgb:255,255,255;--bs-secondary-color:rgba(222, 226, 230, 0.75);--bs-secondary-color-rgb:222,226,230;--bs-secondary-bg:#343a40;--bs-secondary-bg-rgb:52,58,64;--bs-tertiary-color:rgba(222, 226, 230, 0.5);--bs-tertiary-color-rgb:222,226,230;--bs-tertiary-bg:#2b3035;--bs-tertiary-bg-rgb:43,48,53;--bs-primary-text-emphasis:#6ea8fe;--bs-secondary-text-emphasis:#a7acb1;--bs-success-text-emphasis:#75b798;--bs-info-text-emphasis:#6edff6;--bs-warning-text-emphasis:#ffda6a;--bs-danger-text-emphasis:#ea868f;--bs-light-text-emphasis:#f8f9fa;--bs-dark-text-emphasis:#dee2e6;--bs-primary-bg-subtle:#031633;--bs-secondary-bg-subtle:#161719;--bs-success-bg-subtle:#051b11;--bs-info-bg-subtle:#032830;--bs-warning-bg-subtle:#332701;--bs-danger-bg-subtle:#2c0b0e;--bs-light-bg-subtle:#343a40;--bs-dark-bg-subtle:#1a1d20;--bs-primary-border-subtle:#084298;--bs-secondary-border-subtle:#41464b;--bs-success-border-subtle:#0f5132;--bs-info-border-subtle:#087990;--bs-warning-border-subtle:#997404;--bs-danger-border-subtle:#842029;--bs-light-border-subtle:#495057;--bs-dark-border-subtle:#343a40;--bs-heading-color:inherit;--bs-link-color:#6ea8fe;--bs-link-hover-color:#8bb9fe;--bs-link-color-rgb:110,168,254;--bs-link-hover-color-rgb:139,185,254;--bs-code-color:#e685b5;--bs-highlight-color:#dee2e6;--bs-highlight-bg:#664d03;--bs-border-color:#495057;--bs-border-color-translucent:rgba(255, 255, 255, 0.15);--bs-form-valid-color:#75b798;--bs-form-valid-border-color:#75b798;--bs-form-invalid-color:#ea868f;--bs-form-invalid-border-color:#ea868f}*,::after,::before{box-sizing:border-box}@media (prefers-reduced-motion:no-preference){:root{scroll-behavior:smooth}}body{margin:0;font-family:var(--bs-body-font-family);font-size:var(--bs-body-font-size);font-weight:var(--bs-body-font-weight);line-height:var(--bs-body-line-height);color:var(--bs-body-color);text-align:var(--bs-body-text-align);background-color:var(--bs-body-bg);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}hr{margin:1rem 0;color:inherit;border:0;border-top:var(--bs-border-width) solid;opacity:.25}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem;font-weight:500;line-height:1.2;color:var(--bs-heading-color)}h1{font-size:calc(1.375rem + 1.5vw)}@media (min-width:1200px){h1{font-size:2.5rem}}h2{font-size:calc(1.325rem + .9vw)}@media (min-width:1200px){h2{font-size:2rem}}h3{font-size:calc(1.3rem + .6vw)}@media (min-width:1200px){h3{font-size:1.75rem}}h4{font-size:calc(1.275rem + .3vw)}@media (min-width:1200px){h4{font-size:1.5rem}}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-top:0;margin-bottom:1rem}abbr[title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none}address{margin-bottom:1rem;font-style:normal;line-height:inherit}ol,ul{padding-left:2rem}dl,ol,ul{margin-top:0;margin-bottom:1rem}ol ol,ol ul,ul ol,ul ul{margin-bottom:0}dt{font-weight:700}dd{margin-bottom:.5rem;margin-left:0}blockquote{margin:0 0 1rem}b,strong{font-weight:bolder}small{font-size:.875em}mark{padding:.1875em;color:var(--bs-highlight-color);background-color:var(--bs-highlight-bg)}sub,sup{position:relative;font-size:.75em;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:rgba(var(--bs-link-color-rgb),var(--bs-link-opacity,1));text-decoration:underline}a:hover{--bs-link-color-rgb:var(--bs-link-hover-color-rgb)}a:not([href]):not([class]),a:not([href]):not([class]):hover{color:inherit;text-decoration:none}code,kbd,pre,samp{font-family:var(--bs-font-monospace);font-size:1em}pre{display:block;margin-top:0;margin-bottom:1rem;overflow:auto;font-size:.875em}pre code{font-size:inherit;color:inherit;word-break:normal}code{font-size:.875em;color:var(--bs-code-color);word-wrap:break-word}a>code{color:inherit}kbd{padding:.1875rem .375rem;font-size:.875em;color:var(--bs-body-bg);background-color:var(--bs-body-color);border-radius:.25rem}kbd kbd{padding:0;font-size:1em}figure{margin:0 0 1rem}img,svg{vertical-align:middle}table{caption-side:bottom;border-collapse:collapse}caption{padding-top:.5rem;padding-bottom:.5rem;color:var(--bs-secondary-color);text-align:left}th{text-align:inherit;text-align:-webkit-match-parent}tbody,td,tfoot,th,thead,tr{border-color:inherit;border-style:solid;border-width:0}label{display:inline-block}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}select:disabled{opacity:1}[list]:not([type=date]):not([type=datetime-local]):not([type=month]):not([type=week]):not([type=time])::-webkit-calendar-picker-indicator{display:none!important}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}::-moz-focus-inner{padding:0;border-style:none}textarea{resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{float:left;width:100%;padding:0;margin-bottom:.5rem;line-height:inherit;font-size:calc(1.275rem + .3vw)}@media (min-width:1200px){legend{font-size:1.5rem}}legend+*{clear:left}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-fields-wrapper,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-text,::-webkit-datetime-edit-year-field{padding:0}::-webkit-inner-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-cancel-button{cursor:pointer;filter:grayscale(1)}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-color-swatch-wrapper{padding:0}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}::file-selector-button{font:inherit;-webkit-appearance:button}output{display:inline-block}iframe{border:0}summary{display:list-item;cursor:pointer}progress{vertical-align:baseline}[hidden]{display:none!important}

/*!
 * Bootstrap Grid v5.3.8 (https://getbootstrap.com/)
 * Copyright 2011-2025 The Bootstrap Authors
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 */.container,.container-fluid,.container-lg,.container-md,.container-sm,.container-xl,.container-xxl{--bs-gutter-x:1.5rem;--bs-gutter-y:0;width:100%;padding-right:calc(var(--bs-gutter-x) * .5);padding-left:calc(var(--bs-gutter-x) * .5);margin-right:auto;margin-left:auto}@media (min-width:576px){.container,.container-sm{max-width:540px}}@media (min-width:768px){.container,.container-md,.container-sm{max-width:720px}}@media (min-width:992px){.container,.container-lg,.container-md,.container-sm{max-width:960px}}@media (min-width:1200px){.container,.container-lg,.container-md,.container-sm,.container-xl{max-width:1140px}}@media (min-width:1400px){.container,.container-lg,.container-md,.container-sm,.container-xl,.container-xxl{max-width:1320px}}:root{--bs-breakpoint-xs:0;--bs-breakpoint-sm:576px;--bs-breakpoint-md:768px;--bs-breakpoint-lg:992px;--bs-breakpoint-xl:1200px;--bs-breakpoint-xxl:1400px}
/* Cours Anglais. Bootstrap Reboot and containers are prepended by the optional build. */

/* 1. Design tokens */
:root {
  color-scheme: light;
  --ink: #142e3c;
  --muted: #52656b;
  --teal: #006b61;
  --teal-hover: #004e48;
  --mint: #e7f3ec;
  --paper: #fbfaf6;
  --white: #ffffff;
  --line: #d7dfda;
  --sand: #f5e6c4;
  --sun: #edc46d;
  --blue: #dcebf0;
  --focus: #965216;
  --radius: 1.15rem;
  --shadow: 0 1rem 3rem #183f3210;
  --space: clamp(3.5rem, 7vw, 6.5rem);
}

/* 2. Base, readable type, keyboard focus */
* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 1.0625rem/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; overflow-wrap: break-word; }
img, svg { max-width: 100%; }
img { height: auto; }
a { color: var(--teal); text-underline-offset: .22em; text-decoration-thickness: .08em; }
a:hover { color: var(--teal-hover); }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; }
button, input, select, textarea { font: inherit; }
[hidden] { display: none !important; }
.container { --bs-gutter-x: 2rem; max-width: 1232px; }
.skip-link { position: absolute; z-index: 100; top: -6rem; left: 1rem; padding: .75rem 1.2rem; background: var(--white); border: 2px solid var(--teal); border-radius: .5rem; }
.skip-link:focus { top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
h1, h2, h3 { color: var(--ink); text-wrap: balance; }
h1 { font: 400 clamp(2.6rem, 5.7vw, 5rem)/1.07 Georgia, "Times New Roman", serif; letter-spacing: -.055em; }
h2 { font: 400 clamp(2rem, 3.4vw, 3rem)/1.15 Georgia, "Times New Roman", serif; letter-spacing: -.035em; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); line-height: 1.35; letter-spacing: -.025em; }
p { margin-bottom: 1.15rem; }
.muted { color: var(--muted); }
.eyebrow { display: block; color: var(--teal); font-size: .76rem; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 1.1rem; }
.lead { font-size: clamp(1.1rem, 1.8vw, 1.24rem); color: var(--muted); line-height: 1.75; max-width: 49ch; }
.icon { width: 1.2rem; height: 1.2rem; flex-shrink: 0; vertical-align: -.15em; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .7rem; min-height: 48px; padding: .85rem 1.35rem; color: #fff; background: var(--teal); border: 1px solid var(--teal); border-radius: .45rem; font-size: .95rem; font-weight: 650; line-height: 1.4; text-decoration: none; }
.button:hover { color: #fff; background: var(--teal-hover); border-color: var(--teal-hover); }
.text-link { display: inline-flex; align-items: center; gap: .65rem; min-height: 44px; font-size: .94rem; font-weight: 650; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.4rem; }
.pill { display: inline-flex; align-items: center; padding: .25rem .65rem; border-radius: .35rem; background: var(--mint); color: var(--teal); font-size: .74rem; font-weight: 750; letter-spacing: .04em; line-height: 1.6; }

/* 3. Native details/summary navigation: usable before JavaScript loads. */
.utility-bar { background: var(--ink); color: #f2f4ed; font-size: .75rem; letter-spacing: .025em; }
.utility-bar .container { display: flex; gap: 1rem; justify-content: space-between; padding-block: .46rem; }
.utility-bar p { margin: 0; }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 90px; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); text-decoration: none; flex-shrink: 0; }
.brand:hover { color: var(--ink); }
.brand-mark { display: grid; place-items: center; width: 40px; height: 40px; border-radius: .55rem .55rem .55rem .12rem; background: var(--teal); color: #fff; font: italic 1.3rem Georgia, serif; }
.brand-copy { display: flex; flex-direction: column; }
.brand-name { font-size: 1.15rem; font-weight: 750; letter-spacing: -.035em; line-height: 1.2; }
.brand-subtitle { margin-top: .2rem; color: var(--muted); font-size: .63rem; font-weight: 550; letter-spacing: .025em; }
.desktop-nav { display: none; }
.nav-list { display: flex; align-items: center; gap: 1.7rem; list-style: none; margin: 0; padding: 0; }
.nav-list a { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); font-size: .87rem; font-weight: 550; text-decoration: none; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--teal); text-decoration: underline; }
.header-tools { display: flex; align-items: center; gap: .7rem; }
.language-link { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: .4rem .65rem; border: 1px solid var(--line); border-radius: .4rem; font-size: .8rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.language-link:hover { color: var(--teal); border-color: var(--teal); }
.mobile-menu summary { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: .4rem; cursor: pointer; list-style: none; }
.mobile-menu summary::-webkit-details-marker { display: none; }
.mobile-menu[open] summary { background: var(--mint); border-color: var(--teal); }
.mobile-menu-panel { position: absolute; z-index: 20; left: 1rem; right: 1rem; top: calc(100% - .2rem); padding: 1rem; background: var(--white); border: 1px solid var(--line); border-radius: .7rem; box-shadow: var(--shadow); }
.mobile-menu-panel .nav-list { display: grid; gap: .25rem; }
.mobile-menu-panel .nav-list a { display: block; padding: .6rem .7rem; }

/* 4. Homepage. The illustration is native text and CSS, with no image download. */
/* Clip decorative transforms inside this section, without masking page overflow elsewhere. */
.hero { overflow: clip; padding-block: clamp(3.2rem, 6vw, 5rem) clamp(3rem, 6vw, 5rem); }
.hero-grid { display: grid; align-items: center; gap: 3rem; }
.hero h1 { max-width: 12ch; margin: 0 0 1.6rem; }
.hero h1 em { font-weight: inherit; color: var(--teal); }
.hero .lead { margin-bottom: 1.7rem; }
.hero-footnote { display: flex; align-items: center; gap: .6rem; color: var(--muted); font-size: .79rem; margin: 1.25rem 0 0; }
.hero-footnote .icon { color: var(--teal); }
.hero-art { position: relative; padding: 1.3rem .1rem 1.5rem; max-width: 520px; width: 100%; margin-inline: auto; }
.hero-art::before { content: ""; position: absolute; inset: -4% -1% 4% 6%; background: var(--mint); border-radius: 49% 42% 44% 33%; transform: rotate(-7deg); }
.hero-art::after { content: ""; position: absolute; width: 78px; height: 78px; top: -3%; right: 1%; border: 1px solid var(--teal); border-radius: 50%; opacity: .3; }
.notebook { position: relative; z-index: 1; margin-inline: .7rem; background: var(--white); border: 1px solid var(--line); border-radius: .9rem; box-shadow: 0 18px 50px #183f3216; transform: rotate(-2deg); }
.notebook-top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.4rem; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .72rem; }
.notebook-page { padding: 1.8rem 1.5rem 1.5rem; background-image: linear-gradient(var(--line) 1px, transparent 1px); background-size: 100% 2.6rem; background-position-y: 1.9rem; }
.notebook-label { display: table; margin: 0 0 1.1rem; padding: 0 .3rem; color: var(--teal); background: var(--white); font-size: .8rem; font-weight: 650; }
.notebook-phrase { display: table; margin: 0 0 .6rem; background: var(--white); padding: .1rem .3rem; font: clamp(2rem, 5vw, 3.1rem)/1.3 Georgia, serif; color: var(--ink); }
.notebook-translation { display: table; margin: 0 0 1.65rem; padding: .1rem .3rem; color: var(--muted); background: var(--white); font-size: .92rem; }
.notebook-note { display: inline-block; padding: .65rem .9rem; background: var(--sand); color: var(--ink); font-size: .82rem; line-height: 1.5; transform: rotate(1deg); border-radius: .12rem; }
.word-pair { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: .65rem; width: calc(100% - 1.3rem); max-width: 360px; padding: 1rem 1.1rem; margin: -1rem 0 0 auto; background: var(--white); border: 1px solid var(--line); border-radius: .6rem; box-shadow: var(--shadow); transform: rotate(3deg); }
.word-pair span { display: block; font-size: .96rem; font-weight: 650; }
.word-pair small { display: block; margin-bottom: .2rem; font-size: .65rem; color: var(--muted); text-transform: uppercase; letter-spacing: .07em; }
.pair-divider { height: 2.4rem; width: 1px; background: var(--line); flex-shrink: 0; }
.benefits-strip { border-block: 1px solid var(--line); padding-block: 1.3rem; }
.benefits { display: grid; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.benefits li { display: flex; align-items: center; gap: .8rem; font-size: .84rem; color: var(--muted); }
.benefits .icon { color: var(--teal); }
.section { padding-block: var(--space); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem 2rem; flex-wrap: wrap; margin-bottom: 2rem; }
.section-heading h2 { margin: 0; max-width: 22ch; }
.section-heading .eyebrow { margin-bottom: .7rem; }
.section-heading p { margin: .8rem 0 0; max-width: 48ch; color: var(--muted); font-size: .96rem; }
.path-grid, .lesson-grid { display: grid; gap: 1.6rem; }
.path-card { position: relative; display: block; color: var(--ink); background: var(--white); border: 1px solid var(--line); padding: 1.65rem; border-radius: var(--radius); text-decoration: none; }
.path-card:hover { color: var(--ink); border-color: var(--teal); }
.path-number { display: inline-block; margin-bottom: 1.6rem; color: var(--teal); font-size: .75rem; font-weight: 700; }
.path-card h3 { margin-bottom: .7rem; padding-right: 1.4rem; }
.path-card p { margin-bottom: 1.4rem; color: var(--muted); font-size: .92rem; }
.path-card .icon { position: absolute; top: 1.65rem; right: 1.5rem; }
.path-caption { color: var(--teal); font-size: .76rem; font-weight: 700; }
.lessons-section { background: var(--white); border-block: 1px solid var(--line); }
.lesson-card { min-width: 0; }
.lesson-cover { display: flex; align-items: center; justify-content: center; height: 205px; position: relative; overflow: hidden; border-radius: .8rem; background: var(--mint); color: var(--ink); }
.lesson-cover--grammar { background: var(--blue); }
.lesson-cover--travel { background: var(--sand); }
.cover-label { position: absolute; left: 1rem; top: .9rem; color: var(--ink); font-size: .65rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.cover-sheet { display: flex; flex-direction: column; gap: .6rem; padding: 1.3rem 1.6rem; min-width: 180px; background: #fff; border: 1px solid #142e3c1a; border-radius: .35rem; box-shadow: 0 8px 20px #142e3c0e; transform: rotate(-5deg); color: #142e3c; }
.cover-sheet span { font: 1.65rem/1.2 Georgia, serif; }
.cover-sheet small { font-size: .7rem; color: #52656b; }
.lesson-cover--grammar .cover-sheet { transform: rotate(4deg); }
.lesson-cover--travel .cover-sheet { transform: rotate(-3deg); }
.card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin: 1.15rem 0 .65rem; color: var(--muted); font-size: .75rem; }
.lesson-card h3 { font-size: 1.25rem; margin-bottom: .65rem; }
.lesson-card h3 a { color: var(--ink); text-decoration: none; }
.lesson-card h3 a:hover { color: var(--teal); text-decoration: underline; }
.card-description { color: var(--muted); font-size: .9rem; margin-bottom: .75rem; }
.approach-grid { display: grid; gap: 2.5rem; align-items: center; }
.approach-copy h2 { max-width: 20ch; margin-bottom: 1.3rem; }
.approach-copy p { color: var(--muted); max-width: 48ch; }
.method-list { list-style: none; padding: 0; margin: 1.4rem 0 0; }
.method-list li { display: flex; gap: 1rem; padding-block: .9rem; border-top: 1px solid var(--line); }
.method-list strong { display: block; font-size: .94rem; }
.method-list p { margin: .2rem 0 0; color: var(--muted); font-size: .88rem; }
.step-number { display: grid; place-items: center; align-self: flex-start; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 50%; color: var(--teal); font-size: .73rem; flex-shrink: 0; }
.teacher-note { padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--mint); }
.note-heading { font: 400 clamp(1.8rem, 3vw, 2.6rem)/1.2 Georgia, serif; letter-spacing: -.035em; margin-bottom: 1.4rem; }
.teacher-note > p { color: var(--muted); font-size: .94rem; }
.teacher-signature { display: flex; gap: .8rem; align-items: center; }
.initials { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--teal); color: #fff; font: 1.1rem Georgia, serif; flex-shrink: 0; }
.teacher-signature strong, .teacher-signature span { display: block; }
.teacher-signature strong { font-size: .88rem; }
.teacher-signature span { color: var(--muted); font-size: .76rem; }
.question-band { background: var(--ink); color: #f4f6ef; border-radius: var(--radius); padding: clamp(1.6rem, 4vw, 2.5rem); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem 2rem; }
.question-band h2 { color: inherit; margin: 0 0 .7rem; font-size: clamp(1.8rem, 3vw, 2.5rem); }
.question-band p { color: #ccd9d5; margin: 0; max-width: 48ch; font-size: .92rem; }
.question-band .button { background: var(--sun); color: #142e3c; border-color: var(--sun); }
.question-band .button:hover { background: #f6d799; border-color: #f6d799; }

/* 5. Content library and lesson template */
.breadcrumbs { padding-block: 1.3rem; font-size: .78rem; color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: .3rem .55rem; list-style: none; padding: 0; margin: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: .55rem; }
.page-intro { padding-block: 2rem 3rem; }
.page-intro h1 { max-width: 19ch; margin-bottom: 1.4rem; font-size: clamp(2.7rem, 5.5vw, 4.4rem); }
.page-intro .lead { max-width: 60ch; }
.library-nav { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.8rem; }
.library-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: .45rem .9rem; background: var(--white); border: 1px solid var(--line); border-radius: 2rem; font-size: .8rem; font-weight: 600; text-decoration: none; }
.library-nav a:hover { border-color: var(--teal); background: var(--mint); }
.library-group { scroll-margin-top: 1.2rem; padding-block: 2rem 2.5rem; border-top: 1px solid var(--line); }
.library-group h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
.library-row { display: grid; gap: 1.6rem; align-items: center; margin-top: 1.5rem; }
.library-row .lesson-cover { height: 220px; }
.library-row h3 { font-size: clamp(1.4rem, 2.4vw, 1.8rem); margin-top: .8rem; }
.library-row p, .library-level-note { color: var(--muted); font-size: .95rem; }
.library-level-note { max-width: 75ch; padding-bottom: 1.5rem; }
.article-header { padding-block: 1.4rem 2.2rem; border-bottom: 1px solid var(--line); }
.article-header h1 { max-width: 22ch; margin: 1rem 0 1.5rem; font-size: clamp(2.5rem, 5vw, 4rem); }
.article-header .lead { max-width: 64ch; }
.article-meta { display: flex; flex-wrap: wrap; gap: .4rem 1.3rem; color: var(--muted); font-size: .8rem; margin-top: 1.5rem; }
.article-layout { display: grid; gap: 2rem; padding-block: 2.2rem 3rem; }
.article-aside { padding: 1.4rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--white); align-self: start; }
.article-aside h2 { font-family: inherit; font-size: .85rem; font-weight: 700; letter-spacing: 0; margin-bottom: .9rem; }
.article-aside ol { margin: 0; padding-left: 1.1rem; }
.article-aside li { margin-bottom: .6rem; font-size: .82rem; }
.article-aside a { display: inline-block; padding-block: .2rem; }
.article-body { min-width: 0; max-width: 74ch; }
.article-body section { scroll-margin-top: 1.5rem; margin-bottom: 2.5rem; }
.article-body h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); margin-bottom: 1.2rem; }
.article-body h3 { margin-block: 1.7rem .8rem; font-size: 1.25rem; }
.article-body li { margin-bottom: .5rem; }
.article-body p, .article-body li { font-size: 1rem; }
.article-body table { width: 100%; border-collapse: collapse; margin-block: 1.5rem; font-size: .92rem; }
.table-wrap { max-width: 100%; overflow-x: auto; }
.article-body caption { padding: .8rem 0; caption-side: top; color: var(--muted); text-align: left; font-size: .85rem; }
.article-body th, .article-body td { text-align: left; vertical-align: top; padding: .8rem .65rem; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.article-body thead th { background: var(--mint); color: var(--ink); }
.article-body tbody th { font-weight: 600; }
.article-body .note, .takeaway { padding: 1.2rem 1.3rem; border-left: 3px solid var(--teal); border-radius: 0 .55rem .55rem 0; background: var(--mint); }
.article-body .note p:last-child, .takeaway p:last-child { margin-bottom: 0; }
.exercise { padding: clamp(1.1rem, 3vw, 1.8rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.answer-disclosure { margin-top: 1.5rem; border-top: 1px solid var(--line); padding-top: .7rem; }
.answer-disclosure summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .65rem; min-height: 44px; color: var(--teal); font-weight: 650; cursor: pointer; }
.answer-disclosure summary::after { content: "+"; font-size: 1.5rem; line-height: 1; }
.answer-disclosure[open] summary::after { content: "−"; }
.answer-disclosure summary::-webkit-details-marker { display: none; }
.answer-content { margin-top: 1rem; }
/* Reserve 30px label + 250px creative + borders. No ad code is loaded in Phase 1.
   Phase 3 must request only fitting formats; never clip a real ad into this box. */
.ad-slot { height: 282px; margin-block: 2.5rem; border: 1px dashed var(--line); border-radius: .6rem; background: var(--white); }
.ad-slot-label { display: block; height: 30px; line-height: 30px; text-align: center; font-size: .6rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); border-bottom: 1px dashed var(--line); }
.ad-slot-creative { display: grid; place-items: center; height: 250px; font-size: .75rem; color: var(--muted); }
.author-box { display: flex; align-items: flex-start; gap: 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.author-box h2 { font: 650 1rem/1.4 system-ui, sans-serif; letter-spacing: 0; margin-bottom: .4rem; }
.author-box p { color: var(--muted); font-size: .88rem; }
.related-lessons { padding-bottom: var(--space); }
.related-lessons h2 { margin-bottom: 2rem; }

/* 6. About, contact and policy scaffolds */
.prose { max-width: 74ch; padding-bottom: 3rem; }
.prose h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); margin-block: 2.5rem 1rem; }
.prose h3 { font-size: 1.2rem; }
.prose li { margin-bottom: .5rem; }
.about-layout { display: grid; gap: 2.5rem; padding-block: 1rem 4rem; }
.about-layout .prose { padding: 0; }
.contact-panel { padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); margin-bottom: 4rem; }
.email-address { display: inline-block; font-size: clamp(1rem, 3.6vw, 1.65rem); font-weight: 650; margin-block: 1rem; overflow-wrap: anywhere; }
.contact-choices { display: grid; gap: 1rem; margin-top: 2rem; }
.contact-choices h2 { font: 650 1rem/1.4 system-ui, sans-serif; letter-spacing: 0; margin-top: 0; }
.contact-choices p { font-size: .88rem; margin-bottom: 0; }
.review-notice { padding: 1rem 1.2rem; border: 1px solid #c5a76f; border-radius: .5rem; background: var(--sand); color: var(--ink); margin-bottom: 2rem; font-size: .92rem; }
.review-notice p { color: inherit; margin: 0; }
.root-landing { max-width: 720px; padding-block: 5rem; }

/* 7. Footer */
.site-footer { margin-top: 1rem; padding-top: 3rem; border-top: 1px solid var(--line); }
.footer-grid { display: grid; gap: 2rem; padding-bottom: 2.5rem; }
.footer-about p { max-width: 35ch; color: var(--muted); font-size: .85rem; margin: 1rem 0; }
.footer-title { font-size: .8rem; font-weight: 750; margin-bottom: 1rem; }
.footer-links { padding: 0; margin: 0; list-style: none; }
.footer-links li + li { margin-top: .25rem; }
.footer-links a { display: inline-flex; align-items: center; min-height: 36px; color: var(--muted); font-size: .83rem; text-decoration: none; }
.footer-links a:hover { color: var(--teal); text-decoration: underline; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 1.2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .72rem; }
.footer-bottom p { margin: 0; }

/* 8. Mobile-first layout changes */
@media (min-width: 576px) {
  .benefits, .path-grid, .contact-choices { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.5fr 1fr; }
  .library-row { grid-template-columns: .9fr 1.4fr; gap: 2rem; }
}
@media (min-width: 768px) {
  .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 2.5rem; }
  .hero-art { padding-block: 2.4rem; }
  .notebook-page { padding: 1.8rem 1.8rem 2.2rem; }
  .path-grid, .lesson-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .approach-grid, .about-layout { grid-template-columns: 1.1fr 1fr; gap: 4rem; }
  .article-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 3rem; }
  .article-aside { position: sticky; top: 1.5rem; }
  .footer-grid { grid-template-columns: 1.7fr 1fr 1fr; gap: 3rem; }
}
@media (min-width: 992px) {
  .desktop-nav { display: block; margin-left: auto; margin-right: 1.5rem; }
  .mobile-menu { display: none; }
  .hero-grid { gap: 5rem; }
  .benefits { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: 235px minmax(0, 1fr); gap: 4rem; }
  .article-header h1 { max-width: 25ch; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
@media (max-width: 575px) {
  .utility-bar .small-note { display: none; }
  .brand-subtitle { font-size: .59rem; }
  .brand-name { font-size: 1.06rem; }
  .brand-mark { width: 35px; height: 35px; }
  .header-inner { min-height: 78px; gap: .5rem; }
  .header-tools { gap: .45rem; }
  .hero-art { margin-top: .5rem; }
  .hero .actions .button { width: 100%; }
  .hero .actions .text-link { margin-inline: auto; }
  .lesson-grid { gap: 2.5rem; }
}

/* 9. Respect system preferences; light is the default. */
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --ink: #e8efe9; --muted: #b4c4bd; --teal: #98dbc8; --teal-hover: #b9edde; --mint: #203d36; --paper: #111f21; --white: #182c2e; --line: #38504c; --sand: #423b2b; --blue: #243b46; --focus: #f5c778; --shadow: 0 1rem 3rem #0003; }
  .button, .button:hover, .brand-mark, .initials { color: #102923; }
  .utility-bar, .question-band { background: #0b1718; }
  .notebook, .word-pair { box-shadow: 0 18px 50px #0002; }
  .review-notice { border-color: #8e794f; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  body { color: #111; background: #fff; font-size: 11pt; }
  .utility-bar, .site-header, .site-footer, .breadcrumbs, .article-aside, .ad-slot, .related-lessons, .skip-link { display: none !important; }
  .container { max-width: none; padding: 0; }
  .article-layout { display: block; padding-top: 1rem; }
  .article-body { max-width: none; }
  h1 { font-size: 28pt !important; }
  h2 { font-size: 19pt !important; }
  a { color: #111; }
}