/* ===== Craft Knowledge portal theme ===== */
:root {
    --ck-teal: #1f5f73;
    --ck-teal-dark: #164a5a;
    --ck-teal-soft: #e3f0f3;
    --ck-gold: #e0a419;
    --ck-gold-dark: #9a6c05;
    --ck-gold-soft: #fdf0d2;
    --ck-navy: #0f2a3d;
    --ck-text: #24384a;
    --ck-muted: #5a6876;
    --ck-line: #e3edf1;
    --ck-bg: #f6fafb;
    --ck-white: #ffffff;
    --ck-green: #1f7a4d;
    --ck-green-soft: #e1f3e9;
    --ck-red: #b23b2e;
    --ck-radius: 18px;
}

html, body {
    font-family: 'Poppins', Arial, sans-serif;
    color: var(--ck-text);
    background: var(--ck-bg);
    margin: 0;
}

a { color: var(--ck-teal); }
a:hover { color: var(--ck-navy); }
h1, h2, h3, h4 { color: var(--ck-navy); font-weight: 700; }
h1:focus { outline: none; }

.ck-wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---------- Top bar ---------- */
.ck-top { background: var(--ck-white); border-bottom: 1px solid var(--ck-line); position: sticky; top: 0; z-index: 20; }
.ck-top-inner { display: flex; align-items: center; gap: 28px; min-height: 76px; flex-wrap: wrap; }
.ck-logo img { height: 48px; width: auto; display: block; }
.ck-nav { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.ck-nav-link { color: var(--ck-muted); text-decoration: none; font-size: 15px; font-weight: 500; padding: 10px 14px; border-radius: 999px; }
.ck-nav-link:hover { color: var(--ck-teal); background: var(--ck-teal-soft); }
.ck-nav-link.active { color: var(--ck-teal); background: var(--ck-teal-soft); font-weight: 600; }
.ck-user { display: flex; align-items: center; gap: 12px; }
.ck-user form { margin: 0; }
.ck-user-name { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ck-navy); font-size: 14px; }
.ck-avatar { width: 36px; height: 36px; border-radius: 999px; background: var(--ck-teal); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.ck-user-email { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.ck-main { padding: 40px 0 72px; min-height: calc(100vh - 160px); }
.ck-foot { border-top: 1px solid var(--ck-line); background: var(--ck-white); }
.ck-foot-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 22px 24px; font-size: 14px; color: var(--ck-muted); }

/* ---------- Buttons ---------- */
.ck-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: inherit; font-weight: 600; font-size: 15px;
    padding: 12px 22px; border-radius: 999px; border: 1px solid transparent; cursor: pointer; text-decoration: none; transition: all .15s ease; line-height: 1.2; min-height: 44px; }
.ck-btn-sm { font-size: 14px; padding: 9px 16px; min-height: 40px; }
.ck-btn-xs { font-size: 13px; padding: 6px 12px; min-height: 32px; }
.ck-btn-gold { background: var(--ck-gold); color: var(--ck-navy); }
.ck-btn-gold:hover { background: #eab230; color: var(--ck-navy); }
.ck-btn-teal { background: var(--ck-teal); color: #fff; }
.ck-btn-teal:hover { background: var(--ck-teal-dark); color: #fff; }
.ck-btn-ghost { background: transparent; color: var(--ck-teal); border-color: #c9dde3; }
.ck-btn-ghost:hover { background: var(--ck-teal-soft); color: var(--ck-teal); }
.ck-btn-danger { background: transparent; color: var(--ck-red); border-color: #efc9c4; }
.ck-btn-danger:hover { background: #fbeceb; color: var(--ck-red); }
.ck-btn:disabled { opacity: .55; cursor: not-allowed; }

/* ---------- Page heading ---------- */
.ck-page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 28px; }
.ck-page-head h1 { font-size: 32px; margin: 0 0 6px; }
.ck-page-head p { margin: 0; color: var(--ck-muted); }
.ck-kicker { color: var(--ck-teal); font-size: 12px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase; margin: 0 0 8px; }
.ck-crumb { font-size: 14px; color: var(--ck-muted); margin-bottom: 12px; }
.ck-crumb a { text-decoration: none; font-weight: 600; }
.ck-section-title { font-size: 20px; margin: 0 0 16px; }
.ck-muted { color: var(--ck-muted); }
.ck-small { font-size: 13px; }

/* ---------- Cards / grid ---------- */
.ck-card { background: var(--ck-white); border: 1px solid var(--ck-line); border-radius: var(--ck-radius); padding: 24px; }
.ck-card + .ck-card { margin-top: 20px; }
.ck-grid { display: grid; gap: 20px; }
.ck-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ck-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ck-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ck-split { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 24px; align-items: start; }
@media (max-width: 991px) {
    .ck-grid-3, .ck-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ck-split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
    .ck-grid-2, .ck-grid-3, .ck-grid-4 { grid-template-columns: minmax(0, 1fr); }
    .ck-user-email { display: none; }
}

.ck-stat { background: var(--ck-white); border: 1px solid var(--ck-line); border-radius: var(--ck-radius); padding: 22px; }
.ck-stat-num { font-size: 32px; font-weight: 700; color: var(--ck-navy); line-height: 1.1; }
.ck-stat-label { font-size: 14px; color: var(--ck-muted); margin-top: 4px; }
.ck-stat-teal { background: var(--ck-teal); border-color: var(--ck-teal); }
.ck-stat-teal .ck-stat-num, .ck-stat-teal .ck-stat-label { color: #fff; }
.ck-stat-gold { background: var(--ck-gold-soft); border-color: #f3dfae; }

/* Course cards */
.ck-course { display: flex; flex-direction: column; gap: 12px; border-radius: 22px; padding: 26px; border: 1px solid var(--ck-line); background: var(--ck-white); text-decoration: none; color: var(--ck-text); transition: all .2s ease; }
.ck-course:hover { transform: translateY(-3px); box-shadow: 0 18px 36px -24px rgba(15, 42, 61, .45); color: var(--ck-text); }
.ck-course h3 { font-size: 21px; margin: 0; }
.ck-course p { margin: 0; color: var(--ck-muted); font-size: 15px; line-height: 1.6; }
.ck-course-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 10px; padding-top: 8px; }
.ck-accent-light { background: #f3f8f9; }
.ck-accent-teal { background: var(--ck-teal-soft); }
.ck-accent-gold { background: var(--ck-gold-soft); }

/* Badges / chips */
.ck-badge { display: inline-flex; align-items: center; font-size: 12px; font-weight: 700; padding: 5px 11px; border-radius: 999px; letter-spacing: .3px; white-space: nowrap; }
.ck-badge-teal { background: var(--ck-teal-soft); color: var(--ck-teal); }
.ck-badge-gold { background: var(--ck-gold-soft); color: var(--ck-gold-dark); }
.ck-badge-green { background: var(--ck-green-soft); color: var(--ck-green); }
.ck-badge-grey { background: #eef1f3; color: var(--ck-muted); }
.ck-badge-white { background: #fff; color: var(--ck-teal); }
.ck-chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* Progress */
.ck-progress { height: 8px; border-radius: 999px; background: #e6eef1; overflow: hidden; }
.ck-progress > span { display: block; height: 100%; background: var(--ck-gold); border-radius: 999px; }
.ck-progress-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--ck-muted); margin-top: 6px; }

/* Lists / tables */
.ck-list { list-style: none; margin: 0; padding: 0; }
.ck-list > li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--ck-line); }
.ck-list > li:last-child { border-bottom: 0; }
.ck-grow { flex: 1; min-width: 0; }
.ck-table-wrap { overflow-x: auto; }
.ck-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.ck-table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .8px; color: var(--ck-muted); font-weight: 700; padding: 10px 12px; border-bottom: 1px solid var(--ck-line); }
.ck-table td { padding: 14px 12px; border-bottom: 1px solid var(--ck-line); vertical-align: middle; }
.ck-table tr:last-child td { border-bottom: 0; }

/* Course outline */
.ck-module { border: 1px solid var(--ck-line); border-radius: 16px; background: var(--ck-white); overflow: hidden; }
.ck-module + .ck-module { margin-top: 12px; }
.ck-module-head { display: flex; gap: 14px; align-items: flex-start; padding: 18px 20px; }
.ck-module-num { color: #c48a0a; font-weight: 700; font-size: 16px; min-width: 26px; }
.ck-module-head h3 { font-size: 16px; margin: 0 0 4px; }
.ck-module-head p { margin: 0; font-size: 14px; color: var(--ck-muted); }
.ck-lessons { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ck-line); }
.ck-lessons li a, .ck-lessons li > span { display: flex; align-items: center; gap: 12px; padding: 12px 20px; text-decoration: none; color: var(--ck-text); font-size: 14px; }
.ck-lessons li a:hover { background: var(--ck-bg); }
.ck-lessons li.current a { background: var(--ck-teal-soft); font-weight: 600; }
.ck-check { width: 22px; height: 22px; border-radius: 999px; border: 2px solid #c9dde3; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; color: #fff; }
.ck-check.done { background: var(--ck-green); border-color: var(--ck-green); }

/* Lesson player */
.ck-player { position: relative; padding-top: 56.25%; border-radius: 16px; overflow: hidden; background: #0f2a3d; }
.ck-player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.ck-empty-player { border-radius: 16px; background: var(--ck-teal-soft); color: var(--ck-teal); padding: 48px 24px; text-align: center; font-weight: 600; }
.ck-notes { white-space: pre-line; line-height: 1.75; color: var(--ck-text); }

/* Lesson HTML content */
.ck-lesson-html { line-height: 1.75; color: var(--ck-text); font-size: 16px; overflow-wrap: anywhere; }
.ck-lesson-html > :first-child { margin-top: 0; }
.ck-lesson-html > :last-child { margin-bottom: 0; }
.ck-lesson-html h1, .ck-lesson-html h2, .ck-lesson-html h3, .ck-lesson-html h4 { line-height: 1.3; margin: 1.6em 0 .5em; color: var(--ck-text); }
.ck-lesson-html h2 { font-size: 22px; } .ck-lesson-html h3 { font-size: 18px; } .ck-lesson-html h4 { font-size: 16px; }
.ck-lesson-html p, .ck-lesson-html ul, .ck-lesson-html ol, .ck-lesson-html blockquote, .ck-lesson-html table, .ck-lesson-html pre { margin: 0 0 1em; }
.ck-lesson-html ul, .ck-lesson-html ol { padding-left: 1.4em; }
.ck-lesson-html li { margin: .25em 0; }
.ck-lesson-html a { color: var(--ck-teal); text-decoration: underline; }
.ck-lesson-html img, .ck-lesson-html video { max-width: 100%; height: auto; border-radius: 12px; }
.ck-lesson-html iframe { width: 100%; min-height: 420px; border: 1px solid var(--ck-line); border-radius: 12px; }
.ck-lesson-html blockquote { border-left: 4px solid var(--ck-gold); background: var(--ck-gold-soft); padding: 12px 16px; border-radius: 0 12px 12px 0; }
.ck-lesson-html code { font-family: Consolas, "Courier New", monospace; font-size: .9em; background: var(--ck-teal-soft); padding: 2px 6px; border-radius: 6px; }
.ck-lesson-html pre { background: #0f2a3d; color: #e6f1f4; padding: 16px 18px; border-radius: 12px; overflow-x: auto; line-height: 1.55; }
.ck-lesson-html pre code { background: none; padding: 0; color: inherit; font-size: 14px; }
.ck-lesson-html table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.ck-lesson-html th, .ck-lesson-html td { border: 1px solid var(--ck-line); padding: 8px 12px; text-align: left; vertical-align: top; }
.ck-lesson-html th { background: var(--ck-teal-soft); }
.ck-lesson-html hr { border: 0; border-top: 1px solid var(--ck-line); margin: 1.6em 0; }
.ck-field textarea.ck-html-editor { font-family: Consolas, "Courier New", monospace; font-size: 13.5px; line-height: 1.5; min-height: 320px; }

/* Hero (landing) */
.ck-hero { background: var(--ck-white); border: 1px solid var(--ck-line); border-radius: 28px; padding: 56px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.ck-hero h1 { font-size: 44px; line-height: 1.12; margin: 0 0 16px; }
.ck-hero p { font-size: 17px; line-height: 1.7; color: var(--ck-muted); margin: 0 0 28px; }
.ck-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.ck-hero-panel { background: var(--ck-teal); color: #fff; border-radius: 22px; padding: 28px; }
.ck-hero-panel h3 { color: #fff; font-size: 18px; margin: 0 0 14px; }
.ck-hero-panel li { padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.15); font-size: 15px; }
.ck-hero-panel li:last-child { border-bottom: 0; }
@media (max-width: 860px) { .ck-hero { grid-template-columns: 1fr; padding: 32px; } .ck-hero h1 { font-size: 34px; } }

/* Forms */
.ck-form-row { display: grid; gap: 14px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 640px) { .ck-form-row { grid-template-columns: minmax(0, 1fr); } }
.ck-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.ck-field label { font-size: 13px; font-weight: 600; color: var(--ck-navy); }
.ck-input, .ck-field input, .ck-field select, .ck-field textarea {
    font-family: inherit; font-size: 15px; padding: 10px 14px; border: 1px solid #cfdde2; border-radius: 12px; background: #fff; color: var(--ck-text); width: 100%; box-sizing: border-box; }
.ck-field textarea { min-height: 110px; resize: vertical; }
.ck-input:focus, .ck-field input:focus, .ck-field select:focus, .ck-field textarea:focus { outline: none; border-color: var(--ck-teal); box-shadow: 0 0 0 3px rgba(31, 95, 115, .15); }
.ck-toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 18px; }
.ck-toolbar .ck-input { max-width: 320px; }
.ck-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.ck-alert { border-radius: 14px; padding: 14px 18px; margin-bottom: 20px; font-size: 15px; }
.ck-alert-ok { background: var(--ck-green-soft); color: var(--ck-green); }
.ck-alert-info { background: var(--ck-teal-soft); color: var(--ck-teal); }
.ck-alert-warn { background: var(--ck-gold-soft); color: var(--ck-gold-dark); }
.ck-empty { text-align: center; padding: 36px 20px; color: var(--ck-muted); }

/* Identity pages (Bootstrap forms) */
.btn-primary { background: var(--ck-teal); border-color: var(--ck-teal); border-radius: 999px; font-weight: 600; padding: 10px 22px; }
.btn-primary:hover, .btn-primary:focus { background: var(--ck-teal-dark); border-color: var(--ck-teal-dark); }
.form-control { border-radius: 12px; }
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus { box-shadow: 0 0 0 .2rem rgba(31, 95, 115, .2); }

.valid.modified:not([type=checkbox]) { outline: 1px solid #26b050; }
.invalid { outline: 1px solid #e50000; }
.validation-message { color: #b23b2e; font-size: 13px; }

.blazor-error-boundary { background: #b32121; padding: 1rem 1rem 1rem 1.5rem; color: white; }
.blazor-error-boundary::after { content: "An error has occurred." }
.darker-border-checkbox.form-check-input { border-color: #929292; }
.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder { color: var(--bs-secondary-color); text-align: end; }
.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder { text-align: start; }

/* Lesson navigator (collapsible course outline on the lesson page) */
.ck-split.ck-learn { grid-template-columns: minmax(260px, 1fr) minmax(0, 2.4fr); }
.ck-learn > .ck-outline { order: -1; }
.ck-split.ck-learn.ck-nav-hidden { grid-template-columns: 52px minmax(0, 1fr); }
.ck-outline { display: block; position: sticky; top: 92px; max-height: calc(100vh - 108px); overflow-y: auto; scrollbar-width: thin; }
.ck-nav-card { padding: 18px 20px; }
.ck-nav-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.ck-nav-top h3 { font-size: 16px; margin: 0; line-height: 1.35; }
.ck-iconbtn { font-family: inherit; flex-shrink: 0; width: 32px; height: 32px; border: 1px solid var(--ck-line); border-radius: 10px; background: var(--ck-white); color: var(--ck-muted); font-size: 16px; line-height: 1; cursor: pointer; }
.ck-iconbtn:hover { color: var(--ck-teal); border-color: var(--ck-teal); }
.ck-nav-tools { display: flex; gap: 16px; margin-top: 12px; }
.ck-linkbtn { background: none; border: 0; padding: 0; font: inherit; font-size: 13px; font-weight: 600; color: var(--ck-teal); cursor: pointer; }
.ck-linkbtn:hover { text-decoration: underline; }
.ck-nav-module { margin-top: 10px; }
.ck-nav-module.has-current { border-color: #b9d6de; }
.ck-nav-head { width: 100%; display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: none; border: 0; font: inherit; color: var(--ck-text); text-align: left; cursor: pointer; }
.ck-nav-head:hover { background: var(--ck-bg); }
.ck-nav-head .ck-module-num { font-size: 13px; min-width: 20px; }
.ck-nav-title { font-size: 14px; font-weight: 600; line-height: 1.35; }
.ck-nav-chev { display: inline-block; width: 10px; color: var(--ck-muted); font-size: 12px; transition: transform .15s ease; }
.ck-nav-module.open .ck-nav-chev { transform: rotate(90deg); }
.ck-nav-count { font-size: 12px; color: var(--ck-muted); white-space: nowrap; }
.ck-nav-count.complete { color: var(--ck-green); font-weight: 600; }
.ck-nav-module .ck-lessons li a { padding: 9px 14px 9px 36px; gap: 10px; }
.ck-nav-module .ck-check { width: 18px; height: 18px; font-size: 10px; }
.ck-nav-min { font-size: 11.5px; color: var(--ck-muted); white-space: nowrap; }
.ck-nav-show { position: sticky; top: 92px; width: 52px; padding: 14px 0; display: flex; flex-direction: column; align-items: center; gap: 10px; border: 1px solid var(--ck-line); border-radius: 14px; background: var(--ck-white); color: var(--ck-teal); font: inherit; cursor: pointer; }
.ck-nav-show:hover { border-color: var(--ck-teal); }
.ck-nav-icon { font-size: 18px; line-height: 1; }
.ck-nav-show-label { writing-mode: vertical-rl; font-size: 13px; font-weight: 600; letter-spacing: .5px; }
/* (mobile drawer behaviour for the outline is in the "Responsive" section at the end) */

/* Module quizzes */
.ck-alert-err { background: #fbe9e7; color: var(--ck-red); }
.ck-text-danger { color: var(--ck-red) !important; }
.ck-quiz { margin-top: 20px; }
.ck-quiz-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.ck-quiz-head h2 { font-size: 20px; margin: 0 0 4px; }
.ck-quiz-best { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }
.ck-quiz-q { border: 1px solid var(--ck-line); border-radius: 14px; padding: 16px 18px; margin: 0 0 14px; }
.ck-quiz-q legend, .ck-quiz-legend { font-weight: 600; font-size: 15.5px; line-height: 1.5; padding: 0 4px; margin-bottom: 10px; display: flex; gap: 10px; align-items: flex-start; }
.ck-quiz-legend { padding: 0; }
.ck-quiz-num { flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 999px; background: var(--ck-teal-soft); color: var(--ck-teal); font-size: 13px; font-weight: 700; }
.ck-quiz-opt { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border: 1px solid var(--ck-line); border-radius: 12px; margin-top: 8px; cursor: pointer; font-size: 15px; background: var(--ck-white); }
.ck-quiz-opt:hover { border-color: var(--ck-teal); }
.ck-quiz-opt.picked { border-color: var(--ck-teal); background: var(--ck-teal-soft); }
.ck-quiz-opt input { accent-color: var(--ck-teal); width: 18px; height: 18px; margin: 0; flex-shrink: 0; }
.ck-quiz-opt.review { cursor: default; }
.ck-quiz-opt.review:hover { border-color: var(--ck-line); }
.ck-quiz-opt.correct { border-color: var(--ck-green); background: var(--ck-green-soft); }
.ck-quiz-opt.chosen { border-color: var(--ck-red); background: #fbe9e7; }
.ck-quiz-dot { width: 18px; text-align: center; font-weight: 700; flex-shrink: 0; }
.ck-quiz-opt.correct .ck-quiz-dot { color: var(--ck-green); }
.ck-quiz-opt.chosen .ck-quiz-dot { color: var(--ck-red); }
.ck-quiz-q.reviewed.right { border-color: #b7dfc8; }
.ck-quiz-q.reviewed.wrong { border-color: #f0c2bb; }
.ck-quiz-mark { margin-left: auto; font-size: 12.5px; font-weight: 600; white-space: nowrap; }
.ck-quiz-q.right .ck-quiz-mark { color: var(--ck-green); }
.ck-quiz-q.wrong .ck-quiz-mark { color: var(--ck-red); }
.ck-quiz-explain { margin: 10px 0 0; font-size: 14px; color: var(--ck-muted); line-height: 1.6; }
.ck-quiz-actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 6px; }
.ck-quiz-score { display: flex; align-items: center; gap: 18px; padding: 16px 20px; border-radius: 14px; margin-bottom: 18px; }
.ck-quiz-score.pass { background: var(--ck-green-soft); color: var(--ck-green); }
.ck-quiz-score.fail { background: var(--ck-gold-soft); color: var(--ck-gold-dark); }
.ck-quiz-pct { font-size: 34px; font-weight: 700; line-height: 1; }
.ck-qa-card { margin-top: 12px; }
.ck-qa-top { display: flex; gap: 12px; align-items: flex-start; }
.ck-qa-opts { margin: 10px 0 0 38px; padding-left: 18px; font-size: 14.5px; line-height: 1.7; }
.ck-qa-opts li.correct { color: var(--ck-green); font-weight: 600; }
.ck-qa-editing { border-color: var(--ck-teal); }
.ck-qa-optrow { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.ck-qa-optrow input[type=radio] { accent-color: var(--ck-teal); width: 18px; height: 18px; margin: 0; flex-shrink: 0; }
.ck-qa-letter { width: 18px; font-weight: 700; color: var(--ck-muted); flex-shrink: 0; }
.ck-quiz-admin { margin-top: 8px; }
.ck-nav-quiz { font-size: 10.5px; font-weight: 700; color: var(--ck-gold-dark); background: var(--ck-gold-soft); border-radius: 999px; padding: 2px 7px; white-space: nowrap; }
.ck-lessons li a.ck-quiz-link { display: inline-flex; padding: 6px 14px; color: #fff; font-size: 13px; font-weight: 600; }
.ck-lessons li a.ck-quiz-link:hover { background: var(--ck-teal-dark); }

/* =====================================================================
   Reading tools (lesson pages): toolbar, text size, themes, reading mode
   ===================================================================== */
.ck-lesson-title { font-size: 30px; line-height: 1.25; margin: 0 0 14px; }
.ck-readtools { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 16px; }
.ck-tool { font-family: inherit; display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 36px; min-width: 36px; padding: 6px 12px;
    border: 1px solid var(--ck-line); border-radius: 999px; background: var(--ck-white); color: var(--ck-text); font-size: 13.5px; font-weight: 600; cursor: pointer; line-height: 1; }
.ck-tool:hover { border-color: var(--ck-teal); color: var(--ck-teal); }
.ck-tool:disabled { opacity: .4; cursor: default; }
.ck-tool:disabled:hover { border-color: var(--ck-line); color: var(--ck-text); }
.ck-tool:focus-visible, .ck-menu-btn:focus-visible, .ck-iconbtn:focus-visible { outline: 3px solid rgba(31, 95, 115, .35); outline-offset: 2px; }
.ck-tool[aria-pressed="true"] { background: var(--ck-teal); border-color: var(--ck-teal); color: #fff; }
.ck-tool-big { font-size: 16px; }
.ck-tool-group { display: inline-flex; gap: 4px; padding: 3px; border: 1px solid var(--ck-line); border-radius: 999px; background: var(--ck-white); }
.ck-tool-group .ck-tool { border: 0; min-height: 30px; min-width: 32px; padding: 4px 9px; }
.ck-swatch { width: 30px; min-width: 30px; padding: 0 !important; border-radius: 999px !important; }
.ck-swatch::after { content: ""; width: 18px; height: 18px; border-radius: 999px; border: 1px solid rgba(0,0,0,.2); }
.ck-swatch-light::after { background: #ffffff; }
.ck-swatch-sepia::after { background: #f4ecd8; }
.ck-swatch-dark::after  { background: #15252f; }
.ck-swatch[aria-pressed="true"] { background: transparent; box-shadow: inset 0 0 0 2px var(--ck-teal); }
.ck-tool-outline { display: none; }

/* Text size (lesson text and quiz) */
:root { --ck-read-fs: 16px; }
html.ck-fs-0 { --ck-read-fs: 14.5px; }
html.ck-fs-1 { --ck-read-fs: 16px; }
html.ck-fs-2 { --ck-read-fs: 18px; }
html.ck-fs-3 { --ck-read-fs: 20px; }
html.ck-fs-4 { --ck-read-fs: 22px; }
.ck-lesson-html { font-size: var(--ck-read-fs); }
.ck-lesson-html h2 { font-size: 1.375em; } .ck-lesson-html h3 { font-size: 1.125em; } .ck-lesson-html h4 { font-size: 1em; }
.ck-lesson-html pre code { font-size: .875em; }
.ck-quiz-opt, .ck-quiz-q legend, .ck-quiz-legend { font-size: calc(var(--ck-read-fs) - 1px); }
.ck-quiz-explain { font-size: calc(var(--ck-read-fs) - 2px); }

/* Reading progress bar */
.ck-readbar { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 40; pointer-events: none; }
.ck-readbar > span { display: block; height: 100%; width: 0; background: var(--ck-gold); transition: width .12s linear; }

/* Themes (lesson pages only) */
html.ck-theme-sepia:has(.ck-learn) {
    --ck-bg: #f4ecd8; --ck-white: #fbf6e9; --ck-text: #3b2f22; --ck-navy: #2c2218; --ck-muted: #6e5d48;
    --ck-line: #e4d6b8; --ck-teal-soft: #efe3c4; --ck-gold-soft: #f6e6bd;
}
html.ck-theme-dark:has(.ck-learn) {
    color-scheme: dark;
    --ck-bg: #0e1a21; --ck-white: #15252f; --ck-text: #d5e1e7; --ck-navy: #eef5f8; --ck-muted: #9fb2bc;
    --ck-line: #26414f; --ck-teal: #6cc0d6; --ck-teal-dark: #8fd2e3; --ck-teal-soft: #1a3742;
    --ck-gold-soft: #3a2f12; --ck-gold-dark: #f1c45a; --ck-green: #63c995; --ck-green-soft: #153326; --ck-red: #f08b7f;
}
html.ck-theme-dark:has(.ck-learn) body, html.ck-theme-sepia:has(.ck-learn) body { background: var(--ck-bg); color: var(--ck-text); }
html.ck-theme-dark:has(.ck-learn) .ck-logo img { background: #fff; border-radius: 10px; padding: 3px 6px; }
html.ck-theme-dark:has(.ck-learn) .ck-btn-teal, html.ck-theme-dark:has(.ck-learn) .ck-tool[aria-pressed="true"]:not(.ck-swatch) { background: #2a7b91; border-color: #2a7b91; color: #fff; }
html.ck-theme-dark:has(.ck-learn) .ck-lesson-html pre { background: #08131a; border: 1px solid var(--ck-line); }
html.ck-theme-dark:has(.ck-learn) .ck-lesson-html code { color: #cfe9f1; }
html.ck-theme-dark:has(.ck-learn) .ck-lesson-html blockquote { color: var(--ck-text); }
html.ck-theme-dark:has(.ck-learn) .ck-quiz-opt.chosen, html.ck-theme-dark:has(.ck-learn) .ck-alert-err { background: #3b1c19; }
html.ck-theme-dark:has(.ck-learn) .ck-badge-grey { background: #22323c; color: var(--ck-muted); }
html.ck-theme-dark:has(.ck-learn) .ck-progress { background: #22323c; }

/* Reading mode: only the lesson, in a comfortable column */
.ck-reading-exit { display: none; }
html.ck-reading:has(.ck-learn) .ck-top,
html.ck-reading:has(.ck-learn) .ck-foot,
html.ck-reading:has(.ck-learn) .ck-crumb,
html.ck-reading:has(.ck-learn) .ck-outline,
html.ck-reading:has(.ck-learn) .ck-drawer-backdrop,
html.ck-reading:has(.ck-learn) .ck-tool-outline { display: none !important; }
html.ck-reading:has(.ck-learn) .ck-main { padding-top: 28px; }
html.ck-reading:has(.ck-learn) .ck-split.ck-learn { grid-template-columns: minmax(0, 1fr); max-width: 760px; margin: 0 auto; }
html.ck-reading:has(.ck-learn) .ck-lesson-card { background: transparent; border: 0; padding: 0; }
html.ck-reading:has(.ck-learn) .ck-lesson-html { line-height: 1.85; }
html.ck-reading:has(.ck-learn) .ck-lesson-title { font-size: 34px; }
html.ck-reading:has(.ck-learn) .ck-reading-exit { display: inline-flex; position: fixed; right: 20px; bottom: 20px; z-index: 45; align-items: center; gap: 6px;
    font-family: inherit; font-size: 13.5px; font-weight: 600; padding: 10px 16px; border-radius: 999px; border: 1px solid var(--ck-line);
    background: var(--ck-white); color: var(--ck-text); box-shadow: 0 10px 30px -12px rgba(15, 42, 61, .45); cursor: pointer; }
html.ck-reading:has(.ck-learn) .ck-reading-exit:hover { border-color: var(--ck-teal); color: var(--ck-teal); }

@media print {
    .ck-top, .ck-foot, .ck-outline, .ck-readtools, .ck-readbar, .ck-reading-exit, .ck-lesson-nav, .ck-drawer-backdrop { display: none !important; }
    .ck-split.ck-learn { grid-template-columns: 1fr !important; }
    .ck-lesson-card { border: 0; padding: 0; }
    .ck-lesson-html details { display: block; }
}

/* =====================================================================
   Responsive
   ===================================================================== */
img, video { max-width: 100%; height: auto; }
.ck-menu-btn { display: none; }
.ck-drawer-head, .ck-drawer-backdrop { display: none; }

/* Tablets and phones: course outline becomes a slide-in drawer */
@media (max-width: 991px) {
    .ck-split.ck-learn, .ck-split.ck-learn.ck-nav-hidden { grid-template-columns: minmax(0, 1fr); }
    .ck-tool-outline { display: inline-flex; }
    .ck-outline { position: fixed; top: 0; left: 0; bottom: 0; width: min(88vw, 380px); max-height: none; z-index: 60;
        overflow-y: auto; background: var(--ck-bg); padding: 14px; box-sizing: border-box; box-shadow: 0 0 40px rgba(15, 42, 61, .35);
        transform: translateX(-105%); transition: transform .22s ease, visibility .22s; visibility: hidden; }
    html.ck-drawer-open .ck-outline { transform: none; visibility: visible; }
    html.ck-drawer-open, html.ck-drawer-open body { overflow: hidden; }
    .ck-drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 4px 4px 12px; color: var(--ck-navy); }
    .ck-drawer-backdrop { position: fixed; inset: 0; z-index: 55; background: rgba(15, 42, 61, .45); }
    html.ck-drawer-open .ck-drawer-backdrop { display: block; }
    .ck-nav-card .ck-nav-top .ck-iconbtn { display: none; }   /* desktop "hide outline" button */
    .ck-nav-show { position: static; width: 100%; flex-direction: row; justify-content: center; padding: 12px 16px; }
    .ck-nav-show-label { writing-mode: horizontal-tb; }
    .ck-nav-module .ck-lessons li a { padding-top: 11px; padding-bottom: 11px; }   /* bigger tap targets */
}

/* Phones and small tablets: collapsible header menu */
@media (max-width: 760px) {
    .ck-top-inner { gap: 10px 12px; min-height: 64px; }
    .ck-logo img { height: 40px; }
    .ck-menu-btn { display: inline-flex; align-items: center; justify-content: center; margin-left: auto; width: 44px; height: 44px;
        border: 1px solid var(--ck-line); border-radius: 12px; background: var(--ck-white); color: var(--ck-navy); font-size: 20px; cursor: pointer; }
    .ck-nav, .ck-user { display: none; }
    html.ck-menu-open .ck-nav { display: flex; flex-direction: column; flex-basis: 100%; gap: 2px; padding: 6px 0; }
    html.ck-menu-open .ck-user { display: flex; flex-basis: 100%; justify-content: space-between; flex-wrap: wrap; padding: 10px 0 14px; border-top: 1px solid var(--ck-line); }
    .ck-nav-link { padding: 12px 14px; border-radius: 12px; }
    .ck-user-email { display: inline; }
}

/* Phones */
@media (max-width: 640px) {
    .ck-wrap { padding: 0 16px; }
    .ck-main { padding: 22px 0 48px; }
    .ck-card { padding: 18px; border-radius: 14px; }
    .ck-page-head { margin-bottom: 20px; align-items: flex-start; }
    .ck-page-head h1 { font-size: 26px; }
    .ck-lesson-title { font-size: 24px; }
    html.ck-reading:has(.ck-learn) .ck-lesson-title { font-size: 26px; }
    html.ck-reading:has(.ck-learn) .ck-main { padding-top: 16px; }
    .ck-stat-num { font-size: 26px; }
    .ck-hero { padding: 24px; border-radius: 20px; }
    .ck-hero h1 { font-size: 28px; }
    .ck-course { padding: 20px; }

    /* Lists with action buttons (admin): let the buttons drop below the title */
    .ck-list > li { flex-wrap: wrap; gap: 10px; }
    .ck-list > li > .ck-grow { flex-basis: 100%; }
    .ck-list > li > span > .ck-input { flex-basis: 100%; }
    .ck-toolbar .ck-input { max-width: none; }

    /* iOS zooms into inputs smaller than 16px */
    .ck-input, .ck-field input, .ck-field select, .ck-field textarea, .form-control { font-size: 16px; }

    /* Lesson content */
    .ck-lesson-html pre { padding: 12px 14px; margin-left: -4px; margin-right: -4px; }
    .ck-lesson-html th, .ck-lesson-html td { padding: 7px 9px; }
    .ck-lesson-html table { font-size: .9em; }
    .ck-lesson-html iframe { min-height: 260px; }
    .ck-lesson-html ul, .ck-lesson-html ol { padding-left: 1.2em; }
    .ck-readtools { gap: 6px; }
    .ck-tool-label { display: none; }   /* icon-only reading button on phones */
    .ck-lesson-nav { gap: 10px; }
    .ck-lesson-nav > div { flex: 1 1 100%; }
    .ck-lesson-nav .ck-btn { flex: 1 1 auto; }
    html.ck-reading:has(.ck-learn) .ck-reading-exit { right: 12px; bottom: 12px; }

    /* Quizzes */
    .ck-quiz-q { padding: 14px; }
    .ck-quiz-actions { flex-wrap: wrap; }
    .ck-quiz-best { align-items: flex-start; }
    .ck-qa-opts { margin-left: 0; }
    .ck-quiz-score { gap: 12px; flex-wrap: wrap; }
}
@media (max-width: 640px) { .ck-lesson-nav > div:empty { display: none; } }
@media (max-width: 640px) {
    /* Admin course editor: module headers and lesson rows wrap their buttons */
    .ck-module-head { flex-wrap: wrap; padding: 16px; gap: 10px; }
    .ck-module-head > .ck-grow { flex: 1 1 calc(100% - 50px); }
    .ck-module-head > .ck-actions { flex-basis: 100%; }
    .ck-lessons li > span { flex-wrap: wrap; padding: 12px 16px; gap: 8px 10px; }
    .ck-lessons li > span > .ck-grow { flex: 1 1 calc(100% - 120px); }
    .ck-lessons li > span > .ck-input { flex-basis: 100%; }
    .ck-lessons li > .ck-form-row, .ck-lessons li > div { padding-left: 16px; padding-right: 16px; }
    .ck-table { font-size: 13.5px; }
    .ck-table td, .ck-table th { padding: 10px 8px; }
}