/* ==========================================================================
   CloudPath Academy — Main Stylesheet
   Original W3Schools-inspired learning layout with our own teal-green brand.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --cp-primary: #0D7F68;
  --cp-primary-hover: #0A6A57;
  --cp-primary-bright: #17A47E;
  --cp-primary-light: #E3F4EF;
  --cp-primary-tint: #F0FAF6;
  --cp-accent: #E8A33D;
  --cp-accent-light: #FDF3E3;
  --cp-danger: #C64B52;
  --cp-danger-light: #FBEBEC;
  --cp-warn: #B07818;
  --cp-warn-light: #FCF4E4;
  --cp-info: #2E7D8C;
  --cp-info-light: #E8F4F6;

  --cp-bg: #FFFFFF;
  --cp-surface: #F2F6F4;
  --cp-surface-2: #E9EFEA;
  --cp-sidebar-bg: #F0F4F2;
  --cp-dark: #152420;
  --cp-dark-2: #1D302B;
  --cp-border: #DCE5E0;
  --cp-border-strong: #C3D2CB;

  --cp-text: #1C2B26;
  --cp-text-muted: #5C6B65;
  --cp-text-faint: #8CA09A;

  --cp-code-bg: #10201B;
  --cp-code-border: #1C3129;
  --cp-code-text: #D7E7E0;

  --font-sans: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", "Fira Code", Consolas, "Courier New", monospace;

  --radius: 8px;
  --radius-sm: 6px;
  --shadow-1: 0 1px 3px rgba(21, 36, 32, 0.08);
  --shadow-2: 0 4px 14px rgba(21, 36, 32, 0.12);
  --shadow-3: 0 10px 30px rgba(21, 36, 32, 0.18);

  --header-h: 58px;
  --catbar-h: 42px;
  --sidebar-w: 288px;
  --toc-w: 216px;

  --focus-ring: 0 0 0 3px rgba(13, 127, 104, 0.35);
}

[data-theme="dark"] {
  --cp-primary: #17A47E;
  --cp-primary-hover: #1FB98F;
  --cp-primary-light: #143529;
  --cp-primary-tint: #122B23;
  --cp-accent: #E8A33D;
  --cp-accent-light: #3A2E17;
  --cp-danger: #E0686F;
  --cp-danger-light: #3A2224;
  --cp-warn: #D9A441;
  --cp-warn-light: #362B14;
  --cp-info: #56AEBB;
  --cp-info-light: #16333A;

  --cp-bg: #0F1714;
  --cp-surface: #16211D;
  --cp-surface-2: #1C2924;
  --cp-sidebar-bg: #131C18;
  --cp-dark: #0C1411;
  --cp-dark-2: #131F1A;
  --cp-border: #273831;
  --cp-border-strong: #34473F;

  --cp-text: #E4EDE9;
  --cp-text-muted: #9FB0AA;
  --cp-text-faint: #6E827C;

  --cp-code-bg: #0C1713;
  --cp-code-border: #1E332B;

  --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-3: 0 10px 30px rgba(0, 0, 0, 0.55);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--cp-text);
  background: var(--cp-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }
.ic { width: 20px; height: 20px; flex: none; }

a { color: var(--cp-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 4px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 2000;
  background: var(--cp-primary); color: #fff; padding: 10px 18px; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--radius-sm);
  font: 600 15px/1.2 var(--font-sans); cursor: pointer; text-decoration: none !important;
  border: 1px solid transparent; transition: background .15s, color .15s, border-color .15s, transform .1s;
  min-height: 40px;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--cp-primary); color: #fff; }
.btn-primary:hover { background: var(--cp-primary-hover); }
.btn-outline { background: transparent; color: var(--cp-text); border-color: var(--cp-border-strong); }
.btn-outline:hover { background: var(--cp-surface); border-color: var(--cp-primary); color: var(--cp-primary); }
.btn-ghost { background: transparent; color: var(--cp-primary); }
.btn-ghost:hover { background: var(--cp-primary-light); }
.btn-accent { background: var(--cp-accent); color: #231803; }
.btn-accent:hover { filter: brightness(0.95); }
.btn-sm { padding: 7px 14px; font-size: 13.5px; min-height: 34px; }
.btn-lg { padding: 13px 30px; font-size: 16.5px; min-height: 48px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: transparent; border: none; cursor: pointer; color: var(--cp-text);
}
.icon-btn:hover { background: var(--cp-surface-2); }

/* ---------- Header ---------- */
.top-header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--cp-bg);
  border-bottom: 1px solid var(--cp-border);
  box-shadow: var(--shadow-1);
}
.header-inner {
  max-width: 1660px; margin: 0 auto; height: var(--header-h);
  display: flex; align-items: center; gap: 14px; padding: 0 18px;
}
.brand { display: flex; align-items: center; gap: 9px; color: var(--cp-text); text-decoration: none !important; }
.brand-mark { width: 30px; height: 30px; color: var(--cp-primary); }
.brand-name { font-size: 19px; font-weight: 800; letter-spacing: -0.3px; white-space: nowrap; }
.brand-name em { font-style: normal; color: var(--cp-primary); }

.header-nav { display: flex; gap: 2px; margin-left: 6px; }
.header-nav a {
  padding: 8px 12px; border-radius: var(--radius-sm); color: var(--cp-text);
  font-weight: 600; font-size: 14.5px; white-space: nowrap;
}
.header-nav a:hover { background: var(--cp-primary-light); color: var(--cp-primary); text-decoration: none; }

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* Search */
.search-box { position: relative; width: 300px; }
.search-box .search-icon {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  color: var(--cp-text-faint); width: 17px; height: 17px; pointer-events: none;
}
#search-input {
  width: 100%; padding: 8px 62px 8px 34px; border-radius: 999px;
  border: 1px solid var(--cp-border-strong); background: var(--cp-bg); color: var(--cp-text);
  font: 400 14px var(--font-sans); transition: border-color .15s, box-shadow .15s;
}
#search-input:focus { outline: none; border-color: var(--cp-primary); box-shadow: var(--focus-ring); }
.search-kbd {
  position: absolute; right: 9px; top: 50%; transform: translateY(-50%);
  font: 600 10.5px var(--font-mono); color: var(--cp-text-faint);
  border: 1px solid var(--cp-border); border-radius: 4px; padding: 2px 5px; background: var(--cp-surface);
  pointer-events: none;
}
.search-dropdown {
  position: absolute; top: calc(100% + 8px); left: 0; right: 0; z-index: 1200;
  background: var(--cp-bg); border: 1px solid var(--cp-border); border-radius: var(--radius);
  box-shadow: var(--shadow-3); max-height: 430px; overflow-y: auto; padding: 6px;
}
.sd-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 11px;
  border-radius: var(--radius-sm); cursor: pointer; text-decoration: none !important; color: var(--cp-text);
}
.sd-item:hover, .sd-item.active { background: var(--cp-primary-light); }
.sd-item .sd-title { font-weight: 600; font-size: 14px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sd-item .sd-title mark { background: var(--cp-accent-light); color: inherit; border-radius: 2px; padding: 0 1px; }
.sd-item .sd-module { font-size: 11.5px; color: var(--cp-primary); font-weight: 700; white-space: nowrap; }
.sd-empty { padding: 16px; text-align: center; color: var(--cp-text-muted); font-size: 14px; }
.sd-footer { padding: 8px 11px; font-size: 12.5px; color: var(--cp-text-faint); border-top: 1px solid var(--cp-border); margin-top: 4px; }

/* Theme toggle */
#theme-toggle .ic-moon { display: none; }
[data-theme="dark"] #theme-toggle .ic-sun { display: none; }
[data-theme="dark"] #theme-toggle .ic-moon { display: block; }

.menu-toggle { display: none; }

/* ---------- Category bar (dark strip) ---------- */
.category-bar {
  background: var(--cp-dark);
  display: flex; align-items: center; gap: 2px;
  height: var(--catbar-h); padding: 0 12px;
  overflow-x: auto; scrollbar-width: none; position: sticky; top: var(--header-h); z-index: 990;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.category-bar::-webkit-scrollbar { display: none; }
.cat-chip {
  color: #D3E0DA; font: 600 13px/1 var(--font-sans); letter-spacing: 0.4px; text-transform: uppercase;
  padding: 7px 13px; border-radius: 999px; white-space: nowrap; text-decoration: none !important;
  display: inline-flex; align-items: center; gap: 6px; transition: background .12s, color .12s;
}
.cat-chip:hover { background: rgba(255,255,255,0.10); color: #fff; }
.cat-chip.active { background: var(--cp-primary); color: #fff; }

/* ---------- Layout ---------- */
.layout {
  flex: 1;
  display: flex; align-items: flex-start;
  max-width: 1660px; width: 100%; margin: 0 auto;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-w); flex: none;
  position: sticky; top: calc(var(--header-h) + var(--catbar-h));
  height: calc(100vh - var(--header-h) - var(--catbar-h));
  display: flex; flex-direction: column;
  background: var(--cp-sidebar-bg); border-right: 1px solid var(--cp-border);
}
.sidebar-scroll { flex: 1; overflow-y: auto; padding: 14px 10px 20px; }
.sidebar-scroll::-webkit-scrollbar { width: 8px; }
.sidebar-scroll::-webkit-scrollbar-thumb { background: var(--cp-border-strong); border-radius: 4px; }

.sidebar-header-link {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  width: 100%; padding: 8px 10px; margin: 2px 0 6px;
  background: transparent; border: none; border-radius: var(--radius-sm);
  font: 700 11.5px/1.3 var(--font-sans); text-transform: uppercase; letter-spacing: 0.9px;
  color: var(--cp-text-faint); cursor: default; text-align: left;
}
.sb-module {
  display: flex; align-items: center; gap: 9px; width: 100%;
  padding: 7.5px 9px; border: none; border-radius: var(--radius-sm);
  background: transparent; cursor: pointer; text-align: left;
  font: 600 14px/1.3 var(--font-sans); color: var(--cp-text);
}
.sb-module:hover { background: var(--cp-surface-2); }
.sb-module.active { background: var(--cp-bg); box-shadow: var(--shadow-1); color: var(--cp-primary); }
.sb-module .sb-mod-icon { width: 17px; height: 17px; color: var(--cp-primary); flex: none; }
.sb-module .sb-mod-title { flex: 1; min-width: 0; }
.sb-module .sb-mod-count { font: 600 10.5px var(--font-mono); color: var(--cp-text-faint); }
.sb-module .sb-chevron { width: 14px; height: 14px; color: var(--cp-text-faint); transition: transform .18s; flex: none; }
.sb-module.open .sb-chevron { transform: rotate(180deg); }

.sb-lessons { display: none; padding: 2px 0 6px 12px; }
.sb-lessons.open { display: block; }
.sb-lesson {
  display: flex; align-items: center; gap: 7px;
  padding: 5.5px 10px; border-left: 3px solid transparent;
  font: 400 13.5px/1.35 var(--font-sans); color: var(--cp-text-muted);
  text-decoration: none !important; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.sb-lesson:hover { background: var(--cp-surface-2); color: var(--cp-text); }
.sb-lesson.active {
  background: var(--cp-bg); border-left-color: var(--cp-primary);
  color: var(--cp-primary); font-weight: 700; box-shadow: var(--shadow-1);
}
.sb-lesson .sb-done { width: 13px; height: 13px; color: var(--cp-primary); flex: none; visibility: hidden; }
.sb-lesson.done .sb-done { visibility: visible; }
.sb-lesson .sb-lesson-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }

.sidebar-progress {
  border-top: 1px solid var(--cp-border); padding: 12px 16px; background: var(--cp-surface);
}
.sp-row { display: flex; justify-content: space-between; font-size: 12px; font-weight: 700; color: var(--cp-text-muted); margin-bottom: 6px; }
.sp-track { height: 7px; background: var(--cp-border); border-radius: 99px; overflow: hidden; }
.sp-fill { height: 100%; background: var(--cp-primary); border-radius: 99px; width: 0; transition: width .4s; }

.sidebar-overlay {
  position: fixed; inset: 0; z-index: 1090; background: rgba(10, 20, 17, 0.55);
  backdrop-filter: blur(2px);
}

/* ---------- Main content ---------- */
.main-content {
  flex: 1; min-width: 0; max-width: 940px;
  margin: 0 auto; padding: 26px 34px 60px;
}

/* Breadcrumb */
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; font-size: 13px; color: var(--cp-text-faint); margin-bottom: 14px; }
.breadcrumb a { color: var(--cp-text-muted); font-weight: 600; }
.breadcrumb a:hover { color: var(--cp-primary); }
.breadcrumb .bc-sep { opacity: 0.6; }
.breadcrumb .bc-current { color: var(--cp-text); font-weight: 600; max-width: 380px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Lesson header */
.lesson-header { margin-bottom: 22px; }
.lesson-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.meta-chip {
  display: inline-flex; align-items: center; gap: 5px;
  font: 600 12px/1 var(--font-sans); padding: 5px 11px; border-radius: 999px;
  background: var(--cp-surface); color: var(--cp-text-muted); border: 1px solid var(--cp-border);
}
.meta-chip .ic { width: 13px; height: 13px; }
.meta-chip.level-beginner { background: var(--cp-primary-light); color: var(--cp-primary); border-color: transparent; }
.meta-chip.level-intermediate { background: var(--cp-accent-light); color: var(--cp-warn); border-color: transparent; }
.meta-chip.level-advanced { background: var(--cp-danger-light); color: var(--cp-danger); border-color: transparent; }

.lesson-title { font-size: clamp(1.7rem, 3.4vw, 2.35rem); font-weight: 800; letter-spacing: -0.5px; margin: 0 0 6px; line-height: 1.2; }
.lesson-subtitle { color: var(--cp-text-muted); font-size: 16px; margin: 0; max-width: 720px; }

/* Lesson body typography */
.lesson-body h2 {
  font-size: 1.45rem; font-weight: 800; letter-spacing: -0.3px;
  margin: 38px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--cp-border);
  scroll-margin-top: 90px;
}
.lesson-body h3 { font-size: 1.14rem; font-weight: 700; margin: 26px 0 10px; scroll-margin-top: 90px; }
.lesson-body h4 { font-size: 1rem; font-weight: 700; margin: 20px 0 8px; }
.lesson-body p { margin: 0 0 14px; }
.lesson-body ul, .lesson-body ol { margin: 0 0 14px; padding-left: 24px; }
.lesson-body li { margin-bottom: 7px; }
.lesson-body strong { font-weight: 700; }
.lesson-body code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: var(--cp-primary-light); color: var(--cp-primary);
  padding: 2px 6px; border-radius: 4px; white-space: nowrap;
}
[data-theme="dark"] .lesson-body code { color: var(--cp-primary-bright); }
.lesson-body hr { border: none; border-top: 1px solid var(--cp-border); margin: 28px 0; }

/* Objectives / prereqs boxes */
.objectives-box, .prereq-box {
  border: 1px solid var(--cp-border); border-radius: var(--radius);
  padding: 16px 18px 6px; margin: 18px 0; background: var(--cp-bg);
}
.objectives-box { border-left: 4px solid var(--cp-primary); }
.prereq-box { border-left: 4px solid var(--cp-accent); background: var(--cp-accent-light); }
.box-title {
  display: flex; align-items: center; gap: 8px;
  font: 700 12.5px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.8px;
  color: var(--cp-text-muted); margin-bottom: 10px;
}
.box-title .ic { width: 15px; height: 15px; }
.objectives-box .box-title { color: var(--cp-primary); }

/* Callouts */
.callout {
  display: flex; gap: 12px; align-items: flex-start;
  border-radius: var(--radius); padding: 14px 16px; margin: 18px 0;
  border: 1px solid transparent; font-size: 14.5px;
}
.callout .ic { width: 19px; height: 19px; margin-top: 2px; flex: none; }
.callout-title { font-weight: 800; margin-bottom: 4px; font-size: 14.5px; }
.callout p:last-child, .callout ul:last-child, .callout ol:last-child { margin-bottom: 0; }
.callout p { margin: 0 0 8px; }
.callout ul, .callout ol { margin: 0 0 8px; padding-left: 20px; }
.callout code { background: rgba(255,255,255,0.72); }
[data-theme="dark"] .callout code { background: rgba(0,0,0,0.3); }

.callout.tip { background: var(--cp-primary-tint); border-color: rgba(13,127,104,0.28); }
.callout.tip .ic, .callout.tip .callout-title { color: var(--cp-primary); }
.callout.info { background: var(--cp-info-light); border-color: rgba(46,125,140,0.3); }
.callout.info .ic, .callout.info .callout-title { color: var(--cp-info); }
.callout.warn { background: var(--cp-warn-light); border-color: rgba(176,120,24,0.32); }
.callout.warn .ic, .callout.warn .callout-title { color: var(--cp-warn); }
.callout.danger { background: var(--cp-danger-light); border-color: rgba(198,75,82,0.32); }
.callout.danger .ic, .callout.danger .callout-title { color: var(--cp-danger); }
.callout.success { background: var(--cp-primary-tint); border-color: rgba(13,127,104,0.28); }
.callout.success .ic, .callout.success .callout-title { color: var(--cp-primary); }
.callout.note { background: var(--cp-surface); border-color: var(--cp-border); }
.callout.note .ic, .callout.note .callout-title { color: var(--cp-text-muted); }

/* Code blocks */
.code-block { margin: 18px 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-1); border: 1px solid var(--cp-code-border); }
.code-head {
  display: flex; align-items: center; gap: 10px;
  background: #172A22; color: #A9C6BB; padding: 8px 12px; font-size: 12.5px;
}
.code-lang { font: 700 10.5px/1 var(--font-mono); text-transform: uppercase; letter-spacing: 0.8px; color: #6FCFA9; }
.code-filename { font: 600 12.5px var(--font-mono); color: #CDE6DA; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.code-head .copy-btn { margin-left: auto; }
.copy-btn {
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,0.08); color: #D7E7E0; border: 1px solid rgba(255,255,255,0.14);
  font: 600 11.5px/1 var(--font-sans); padding: 5px 10px; border-radius: 5px; cursor: pointer;
  transition: background .12s; white-space: nowrap;
}
.copy-btn:hover { background: rgba(255,255,255,0.16); }
.copy-btn .ic { width: 12px; height: 12px; }
.copy-btn.copied { background: #1D7A5A; border-color: #26916B; color: #fff; }

.code-block pre {
  margin: 0; padding: 14px 16px; overflow-x: auto; background: var(--cp-code-bg);
  font: 400 13.5px/1.62 var(--font-mono); color: var(--cp-code-text);
  tab-size: 2;
}
.code-block pre::-webkit-scrollbar { height: 8px; }
.code-block pre::-webkit-scrollbar-thumb { background: #2A463B; border-radius: 4px; }

.code-output { border-top: 1px dashed var(--cp-code-border); background: #0B1511; }
.code-output-label {
  padding: 6px 16px 0; font: 700 10px/1.6 var(--font-mono); text-transform: uppercase;
  letter-spacing: 1px; color: #6E8B80;
}
.code-output pre { padding: 6px 16px 13px; color: #A9C6BB; background: transparent; }

/* Terminal-ish inline code in text */
.term-inline {
  background: var(--cp-code-bg); color: var(--cp-code-text); border-radius: 6px;
  padding: 12px 14px; overflow-x: auto; font: 400 13px/1.6 var(--font-mono); margin: 14px 0;
}
.term-inline .t-prompt { color: #6FCFA9; font-weight: 700; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--cp-border); border-radius: var(--radius); }
table.cp-table { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--cp-bg); }
table.cp-table caption { caption-side: bottom; padding: 9px 14px; font-size: 12.5px; color: var(--cp-text-faint); text-align: left; }
table.cp-table th {
  background: var(--cp-surface); text-align: left; padding: 10px 14px;
  font-weight: 700; font-size: 13px; border-bottom: 2px solid var(--cp-border-strong); white-space: nowrap;
}
table.cp-table td { padding: 10px 14px; border-bottom: 1px solid var(--cp-border); vertical-align: top; }
table.cp-table tr:last-child td { border-bottom: none; }
table.cp-table tr:nth-child(even) td { background: var(--cp-surface); }
[data-theme="dark"] table.cp-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }
table.cp-table code { white-space: nowrap; }

/* Key terms */
.keyterms { margin: 18px 0; border: 1px solid var(--cp-border); border-radius: var(--radius); overflow: hidden; }
.keyterm-row { display: grid; grid-template-columns: 210px 1fr; border-bottom: 1px solid var(--cp-border); }
.keyterm-row:last-child { border-bottom: none; }
.keyterm-row dt { background: var(--cp-surface); padding: 10px 14px; font-weight: 700; font-size: 13.5px; }
.keyterm-row dd { margin: 0; padding: 10px 14px; font-size: 14px; }

/* Common errors table */
.errors-box { margin: 18px 0; }
.errors-box .table-wrap { border-color: rgba(198,75,82,0.35); }
.errors-box th { background: var(--cp-danger-light); color: var(--cp-danger); }
.err-code { font-family: var(--font-mono); font-size: 12.5px; color: var(--cp-danger); font-weight: 600; }

/* Diagrams */
.diagram { margin: 22px 0; background: var(--cp-bg); border: 1px solid var(--cp-border); border-radius: var(--radius); padding: 18px 16px 12px; }
.diagram-title { font: 700 12.5px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.8px; color: var(--cp-text-muted); margin-bottom: 12px; display: flex; align-items: center; gap: 7px; }
.diagram-title .ic { width: 15px; height: 15px; color: var(--cp-primary); }
.diagram svg { width: 100%; height: auto; display: block; }
.diagram-caption { font-size: 12.5px; color: var(--cp-text-faint); text-align: center; margin-top: 10px; }

/* Quiz */
.quiz { margin: 26px 0; border: 1px solid var(--cp-border-strong); border-radius: var(--radius); overflow: hidden; background: var(--cp-bg); }
.quiz-head {
  display: flex; align-items: center; gap: 9px;
  background: var(--cp-dark-2); color: #EAF3EF; padding: 11px 16px;
  font: 700 13.5px/1 var(--font-sans); letter-spacing: 0.3px;
}
.quiz-head .ic { width: 17px; height: 17px; color: var(--cp-accent); }
.quiz-head .quiz-score-badge { margin-left: auto; font: 700 12px var(--font-mono); background: rgba(255,255,255,0.12); padding: 4px 10px; border-radius: 999px; }
.quiz-body { padding: 18px 18px 20px; }
.quiz-q { padding: 14px 0 4px; border-bottom: 1px dashed var(--cp-border); }
.quiz-q:last-of-type { border-bottom: none; }
.quiz-q-text { font-weight: 700; margin: 0 0 12px; font-size: 15px; }
.quiz-q.no { color: var(--cp-primary); margin-right: 4px; }
.quiz-options { display: grid; gap: 8px; }
.quiz-opt {
  text-align: left; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--cp-border-strong); background: var(--cp-bg);
  font: 400 14px/1.45 var(--font-sans); color: var(--cp-text); cursor: pointer;
  display: flex; gap: 9px; align-items: flex-start; transition: border-color .12s, background .12s;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--cp-primary); background: var(--cp-primary-tint); }
.quiz-opt:disabled { cursor: default; opacity: 0.88; }
.quiz-opt .opt-letter { font-weight: 800; color: var(--cp-text-faint); flex: none; }
.quiz-opt.correct { border-color: var(--cp-primary); background: var(--cp-primary-light); }
.quiz-opt.correct .opt-letter { color: var(--cp-primary); }
.quiz-opt.wrong { border-color: var(--cp-danger); background: var(--cp-danger-light); }
.quiz-opt.wrong .opt-letter { color: var(--cp-danger); }
.quiz-opt.dimmed { opacity: 0.45; }
.quiz-explain {
  margin: 12px 0 6px; padding: 11px 14px; border-radius: var(--radius-sm);
  background: var(--cp-info-light); border-left: 3px solid var(--cp-info);
  font-size: 13.8px; color: var(--cp-text);
}
.quiz-explain .qe-label { font-weight: 800; color: var(--cp-info); display: block; margin-bottom: 3px; }
.quiz-footer { display: flex; align-items: center; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.quiz-result { font-weight: 800; font-size: 15px; color: var(--cp-primary); }
.quiz-result.bad { color: var(--cp-danger); }

/* Exercises */
.exercise {
  margin: 26px 0; border: 1.5px dashed var(--cp-border-strong); border-radius: var(--radius);
  background: var(--cp-surface); padding: 18px 20px;
}
.exercise-head { display: flex; align-items: center; gap: 9px; margin-bottom: 10px; }
.exercise-head .ic { width: 18px; height: 18px; color: var(--cp-accent); }
.exercise-head h3 { margin: 0; font-size: 16px; font-weight: 800; }
.exercise ul, .exercise ol { padding-left: 22px; margin-bottom: 14px; }
.exercise-solution { margin-top: 14px; border-top: 1px dashed var(--cp-border-strong); padding-top: 14px; }
.sol-label { font: 800 12px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.8px; color: var(--cp-primary); margin-bottom: 10px; }
.btn-solution { margin-top: 4px; }

/* Labs */
.lab {
  margin: 26px 0; border: 1px solid var(--cp-border-strong); border-radius: var(--radius);
  overflow: hidden; background: var(--cp-bg);
}
.lab-head { display: flex; align-items: center; gap: 10px; background: var(--cp-primary); color: #fff; padding: 12px 16px; }
.lab-head .ic { width: 18px; height: 18px; }
.lab-head h3 { margin: 0; font-size: 15.5px; font-weight: 800; color: #fff; }
.lab-meta { margin-left: auto; font: 700 11.5px var(--font-mono); background: rgba(255,255,255,0.18); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.lab-body { padding: 16px 18px; }
.lab-step { display: flex; gap: 12px; margin-bottom: 18px; }
.lab-step:last-child { margin-bottom: 4px; }
.lab-step-no {
  width: 26px; height: 26px; flex: none; border-radius: 999px; margin-top: 1px;
  background: var(--cp-primary-light); color: var(--cp-primary);
  display: flex; align-items: center; justify-content: center; font: 800 12.5px var(--font-mono);
}

/* Summary & references */
.summary-box {
  margin: 26px 0; background: var(--cp-primary-tint); border: 1px solid rgba(13,127,104,0.25);
  border-radius: var(--radius); padding: 18px 20px 8px;
}
.summary-box .box-title { color: var(--cp-primary); }
.summary-box ul { padding-left: 22px; }

.references { margin: 26px 0; border-top: 1px solid var(--cp-border); padding-top: 16px; }
.references h3 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--cp-text-faint); }
.references ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
.references a { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.references .ic { width: 12px; height: 12px; opacity: 0.6; }

/* Next-links */
.next-links { margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.next-link-chip {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px;
  background: var(--cp-surface); border: 1px solid var(--cp-border); border-radius: 999px;
  font-size: 13.5px; font-weight: 600; color: var(--cp-text); text-decoration: none !important;
}
.next-link-chip:hover { border-color: var(--cp-primary); color: var(--cp-primary); }

/* Prev / Next navigation */
.lesson-nav { display: flex; justify-content: space-between; gap: 14px; margin-top: 36px; }
.lesson-nav-btn {
  display: flex; flex-direction: column; gap: 3px; padding: 13px 20px; min-width: 150px;
  border-radius: var(--radius); text-decoration: none !important; border: 1px solid var(--cp-border-strong);
  background: var(--cp-bg); transition: background .15s, border-color .15s;
}
.lesson-nav-btn:hover { border-color: var(--cp-primary); }
.lesson-nav-btn .ln-label { font: 700 11px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 1px; color: var(--cp-text-faint); display: flex; align-items: center; gap: 5px; }
.lesson-nav-btn .ln-title { font-weight: 700; font-size: 14.5px; color: var(--cp-text); }
.lesson-nav-btn.next { background: var(--cp-primary); border-color: var(--cp-primary); text-align: right; margin-left: auto; }
.lesson-nav-btn.next:hover { background: var(--cp-primary-hover); }
.lesson-nav-btn.next .ln-label { color: rgba(255,255,255,0.75); justify-content: flex-end; }
.lesson-nav-btn.next .ln-title { color: #fff; }

/* Complete toggle */
.complete-row { display: flex; align-items: center; gap: 14px; margin-top: 26px; padding: 16px 18px; background: var(--cp-surface); border-radius: var(--radius); flex-wrap: wrap; }
.complete-row .cr-text { flex: 1; min-width: 200px; font-size: 14.5px; }
.complete-row .cr-text strong { display: block; }
.complete-row .cr-text span { color: var(--cp-text-muted); font-size: 13px; }

/* ---------- TOC panel ---------- */
.toc-panel { width: var(--toc-w); flex: none; position: sticky; top: calc(var(--header-h) + var(--catbar-h)); height: calc(100vh - var(--header-h) - var(--catbar-h) - 20px); display: none; }
.toc-inner { position: sticky; top: 20px; max-height: calc(100vh - var(--header-h) - var(--catbar-h) - 40px); overflow-y: auto; padding: 10px 6px 20px 0; }
.toc-inner::-webkit-scrollbar { width: 6px; }
.toc-inner::-webkit-scrollbar-thumb { background: var(--cp-border-strong); border-radius: 3px; }
.toc-title { font: 700 11.5px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.9px; color: var(--cp-text-faint); margin: 8px 0 10px; padding-left: 12px; }
.toc-link {
  display: block; width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 5.5px 12px; border-left: 2.5px solid transparent;
  font: 400 13px/1.4 var(--font-sans); color: var(--cp-text-muted); border-radius: 0 4px 4px 0;
}
.toc-link:hover { color: var(--cp-primary); background: var(--cp-primary-tint); border-left-color: var(--cp-border-strong); }
.toc-link.active { color: var(--cp-primary); border-left-color: var(--cp-primary); font-weight: 700; background: var(--cp-primary-light); }

/* ---------- Home page ---------- */
.hero {
  background: linear-gradient(150deg, var(--cp-primary-tint) 0%, var(--cp-bg) 55%);
  border: 1px solid var(--cp-border); border-radius: 14px;
  padding: clamp(28px, 5vw, 54px); margin-bottom: 34px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -80px; top: -80px; width: 320px; height: 320px;
  background: radial-gradient(circle, var(--cp-primary-light) 0%, transparent 70%); border-radius: 50%; pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 7px; background: var(--cp-primary-light); color: var(--cp-primary);
  font: 700 12.5px/1 var(--font-sans); padding: 7px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero-badge .ic { width: 14px; height: 14px; }
.hero h1 { font-size: clamp(1.9rem, 4.6vw, 3.1rem); font-weight: 800; letter-spacing: -1px; line-height: 1.14; margin: 0 0 14px; max-width: 640px; }
.hero h1 em { font-style: normal; color: var(--cp-primary); }
.hero .hero-sub { font-size: clamp(15px, 1.8vw, 17.5px); color: var(--cp-text-muted); max-width: 600px; margin: 0 0 26px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: clamp(18px, 4vw, 44px); margin-top: 34px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat b { font-size: 1.65rem; font-weight: 800; color: var(--cp-primary); letter-spacing: -0.5px; }
.stat span { font-size: 12.5px; color: var(--cp-text-muted); font-weight: 600; }

.section { margin: 42px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.section-head h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.4px; margin: 0; }
.section-head .see-all { font-weight: 700; font-size: 13.5px; white-space: nowrap; }

/* Roadmap strip */
.roadmap-strip { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; }
.roadmap-step {
  flex: 1 1 180px; min-width: 170px; background: var(--cp-bg); border: 1px solid var(--cp-border);
  border-radius: var(--radius); padding: 16px; position: relative; margin: 0 18px 12px 0; text-decoration: none !important;
  transition: border-color .15s, box-shadow .15s;
}
.roadmap-step:hover { border-color: var(--cp-primary); box-shadow: var(--shadow-2); }
.roadmap-step::after {
  content: "→"; position: absolute; right: -16px; top: 50%; transform: translateY(-50%);
  color: var(--cp-text-faint); font-size: 17px; font-weight: 700;
}
.roadmap-step:last-child::after { display: none; }
.rs-no { font: 800 11px/1 var(--font-mono); color: var(--cp-primary); background: var(--cp-primary-light); padding: 4px 9px; border-radius: 999px; display: inline-block; margin-bottom: 9px; }
.roadmap-step h3 { margin: 0 0 4px; font-size: 15px; font-weight: 800; color: var(--cp-text); }
.roadmap-step p { margin: 0; font-size: 12.8px; color: var(--cp-text-muted); }

/* Module cards */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.module-card {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--cp-bg); border: 1px solid var(--cp-border); border-radius: var(--radius);
  padding: 18px; text-decoration: none !important; color: var(--cp-text);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.module-card:hover { border-color: var(--cp-primary); box-shadow: var(--shadow-2); transform: translateY(-2px); }
.mc-top { display: flex; align-items: center; gap: 11px; }
.mc-icon {
  width: 40px; height: 40px; border-radius: 10px; flex: none;
  background: var(--cp-primary-light); color: var(--cp-primary);
  display: flex; align-items: center; justify-content: center;
}
.mc-icon .ic { width: 21px; height: 21px; }
.mc-top h3 { margin: 0; font-size: 15.5px; font-weight: 800; line-height: 1.25; }
.mc-title-wrap { min-width: 0; }
.mc-desc { font-size: 13.3px; color: var(--cp-text-muted); margin: 0; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.mc-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.mc-lessons { font-size: 12px; color: var(--cp-text-faint); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.mc-lessons .ic { width: 12px; height: 12px; }
.mc-progress-track { height: 5px; background: var(--cp-surface-2); border-radius: 99px; overflow: hidden; }
.mc-progress-fill { height: 100%; background: var(--cp-primary); border-radius: 99px; }

.level-badge {
  font: 700 10.5px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.6px;
  padding: 4px 9px; border-radius: 999px; white-space: nowrap;
}
.level-badge.beginner { background: var(--cp-primary-light); color: var(--cp-primary); }
.level-badge.intermediate { background: var(--cp-accent-light); color: var(--cp-warn); }
.level-badge.advanced { background: var(--cp-danger-light); color: var(--cp-danger); }

/* Free banner */
.free-banner {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: var(--cp-dark-2); color: #EAF3EF; border-radius: var(--radius);
  padding: 24px 28px; margin: 42px 0;
}
.free-banner .fb-icon { width: 46px; height: 46px; border-radius: 12px; background: var(--cp-primary); display: flex; align-items: center; justify-content: center; flex: none; }
.free-banner .fb-icon .ic { width: 24px; height: 24px; color: #fff; }
.free-banner h3 { margin: 0 0 5px; font-size: 18px; font-weight: 800; color: #fff; }
.free-banner p { margin: 0; font-size: 14px; color: #B9CCC3; flex: 1; min-width: 240px; }

/* Feature grid */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.feature {
  display: flex; gap: 12px; background: var(--cp-surface); border-radius: var(--radius);
  padding: 16px; border: 1px solid var(--cp-border);
}
.feature .ic { width: 21px; height: 21px; color: var(--cp-primary); flex: none; margin-top: 2px; }
.feature h3 { margin: 0 0 4px; font-size: 14.5px; font-weight: 800; }
.feature p { margin: 0; font-size: 13px; color: var(--cp-text-muted); }

/* ---------- Module overview page ---------- */
.module-hero {
  display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap;
  background: var(--cp-primary-tint); border: 1px solid var(--cp-border); border-radius: 14px;
  padding: 26px 28px; margin-bottom: 26px;
}
.module-hero .mh-icon {
  width: 62px; height: 62px; border-radius: 16px; background: var(--cp-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; flex: none;
}
.module-hero .mh-icon .ic { width: 32px; height: 32px; }
.module-hero h1 { margin: 0 0 6px; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; letter-spacing: -0.5px; }
.module-hero p { margin: 0 0 12px; color: var(--cp-text-muted); max-width: 640px; }
.module-hero .lesson-meta { margin: 0; }

.lesson-list { display: grid; gap: 10px; }
.lesson-row {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px;
  background: var(--cp-bg); border: 1px solid var(--cp-border); border-radius: var(--radius);
  text-decoration: none !important; color: var(--cp-text); transition: border-color .14s, box-shadow .14s;
}
.lesson-row:hover { border-color: var(--cp-primary); box-shadow: var(--shadow-1); }
.lesson-row .lr-no {
  width: 34px; height: 34px; flex: none; border-radius: 9px; background: var(--cp-surface);
  display: flex; align-items: center; justify-content: center; font: 800 13px var(--font-mono); color: var(--cp-text-muted);
}
.lesson-row.visited .lr-no { background: var(--cp-primary-light); color: var(--cp-primary); }
.lesson-row .lr-main { flex: 1; min-width: 0; }
.lesson-row .lr-main h3 { margin: 0 0 3px; font-size: 15px; font-weight: 700; }
.lesson-row .lr-main p { margin: 0; font-size: 13px; color: var(--cp-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lesson-row .lr-side { display: flex; align-items: center; gap: 10px; flex: none; }
.lesson-row .lr-done { width: 17px; height: 17px; color: var(--cp-primary); }

/* ---------- Generic page hero (tutorials, glossary, etc.) ---------- */
.page-hero { margin-bottom: 26px; }
.page-hero h1 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); font-weight: 800; letter-spacing: -0.5px; margin: 0 0 8px; }
.page-hero p { color: var(--cp-text-muted); margin: 0; max-width: 700px; }

.track-block { margin: 30px 0; }
.track-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.track-badge {
  font: 800 11px/1 var(--font-mono); background: var(--cp-dark); color: #fff;
  padding: 6px 11px; border-radius: 6px; letter-spacing: 0.5px;
}
.track-head h2 { margin: 0; font-size: 1.3rem; font-weight: 800; }
.track-head .track-sub { color: var(--cp-text-faint); font-size: 13px; }

/* ---------- Search results page ---------- */
.search-results { display: grid; gap: 12px; }
.sr-item {
  display: block; padding: 15px 18px; background: var(--cp-bg); border: 1px solid var(--cp-border);
  border-radius: var(--radius); text-decoration: none !important; color: var(--cp-text);
}
.sr-item:hover { border-color: var(--cp-primary); }
.sr-item .sr-module { font: 700 11px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.7px; color: var(--cp-primary); margin-bottom: 5px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.sr-item h3 { margin: 0 0 4px; font-size: 15.5px; }
.sr-item h3 mark { background: var(--cp-accent-light); border-radius: 3px; padding: 0 2px; }
.sr-item p { margin: 0; font-size: 13.5px; color: var(--cp-text-muted); }

/* ---------- Glossary ---------- */
.glossary-controls { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; align-items: center; }
.glossary-search {
  flex: 1; min-width: 240px; padding: 10px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--cp-border-strong); background: var(--cp-bg); color: var(--cp-text);
  font: 400 14.5px var(--font-sans);
}
.glossary-search:focus { outline: none; border-color: var(--cp-primary); box-shadow: var(--focus-ring); }
.gcat-chips { display: flex; gap: 7px; flex-wrap: wrap; }
.gcat-chip {
  border: 1px solid var(--cp-border-strong); background: var(--cp-bg); color: var(--cp-text-muted);
  padding: 6px 13px; border-radius: 999px; font: 600 12.5px var(--font-sans); cursor: pointer;
}
.gcat-chip:hover { border-color: var(--cp-primary); color: var(--cp-primary); }
.gcat-chip.active { background: var(--cp-primary); border-color: var(--cp-primary); color: #fff; }
.glossary-group h3 {
  margin: 24px 0 10px; font: 800 13px/1 var(--font-mono); color: var(--cp-text-faint);
  border-bottom: 2px solid var(--cp-border); padding-bottom: 7px; letter-spacing: 1px;
}
.glossary-item { padding: 10px 4px; border-bottom: 1px dashed var(--cp-border); }
.glossary-item dt { font-weight: 800; font-size: 14.5px; color: var(--cp-primary); display: inline; }
.glossary-item .g-cat { font: 700 10px/1 var(--font-sans); text-transform: uppercase; background: var(--cp-surface-2); color: var(--cp-text-muted); padding: 3px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }
.glossary-item dd { margin: 3px 0 0; font-size: 14px; color: var(--cp-text-muted); }

/* ---------- Cheatsheets ---------- */
.cheat-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 20px; }
.cheat-tab {
  padding: 8px 15px; border-radius: 999px; border: 1px solid var(--cp-border-strong);
  background: var(--cp-bg); color: var(--cp-text-muted); font: 700 13px var(--font-sans); cursor: pointer;
}
.cheat-tab:hover { border-color: var(--cp-primary); color: var(--cp-primary); }
.cheat-tab.active { background: var(--cp-primary); border-color: var(--cp-primary); color: #fff; }
.cheat-group { margin: 20px 0; }
.cheat-group h3 { margin: 0 0 4px; font-size: 15.5px; font-weight: 800; }
.cheat-group > p { margin: 0 0 10px; color: var(--cp-text-muted); font-size: 13.5px; }

/* ---------- Progress page ---------- */
.progress-overview { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; margin-bottom: 26px; }
.po-card { background: var(--cp-bg); border: 1px solid var(--cp-border); border-radius: var(--radius); padding: 18px; }
.po-card .po-num { font-size: 2rem; font-weight: 800; color: var(--cp-primary); letter-spacing: -1px; }
.po-card .po-label { font-size: 13px; color: var(--cp-text-muted); font-weight: 600; }
.progress-module { margin: 16px 0; }
.progress-module .pm-head { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 6px; font-weight: 700; font-size: 14px; }
.progress-module .pm-head a { font-weight: 700; }
.pm-track { height: 8px; background: var(--cp-surface-2); border-radius: 99px; overflow: hidden; }
.pm-fill { height: 100%; background: var(--cp-primary); border-radius: 99px; transition: width .4s; }

/* ---------- Project cards ---------- */
.project-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.project-card {
  display: flex; flex-direction: column; gap: 10px;
  border: 1px solid var(--cp-border); border-radius: var(--radius); padding: 20px;
  background: var(--cp-bg); text-decoration: none !important; color: var(--cp-text);
  transition: border-color .15s, box-shadow .15s;
}
.project-card:hover { border-color: var(--cp-primary); box-shadow: var(--shadow-2); }
.project-card .pc-num { font: 800 12px var(--font-mono); color: var(--cp-accent); }
.project-card h3 { margin: 0; font-size: 16px; font-weight: 800; }
.project-card p { margin: 0; font-size: 13.5px; color: var(--cp-text-muted); flex: 1; }
.pc-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.pc-tag { font: 700 10.5px var(--font-sans); background: var(--cp-surface); border: 1px solid var(--cp-border); color: var(--cp-text-muted); padding: 3.5px 9px; border-radius: 999px; }

/* ---------- Interview Q&A ---------- */
.interview-q { margin: 18px 0; border: 1px solid var(--cp-border); border-radius: var(--radius); overflow: hidden; }
.interview-q .iq-head {
  width: 100%; display: flex; align-items: center; gap: 10px; text-align: left;
  background: var(--cp-surface); border: none; padding: 13px 16px; cursor: pointer;
  font: 700 14.5px/1.4 var(--font-sans); color: var(--cp-text);
}
.interview-q .iq-head:hover { background: var(--cp-surface-2); }
.interview-q .iq-head .ic { width: 15px; height: 15px; color: var(--cp-primary); transition: transform .18s; flex: none; }
.interview-q.open .iq-head .ic { transform: rotate(180deg); }
.interview-q .iq-body { display: none; padding: 4px 18px 16px; border-top: 1px solid var(--cp-border); }
.interview-q.open .iq-body { display: block; }
.iq-body .ans-label { font: 800 11px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.8px; color: var(--cp-primary); margin: 14px 0 6px; }

/* ---------- 404 / empty ---------- */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-state .ic-big { width: 64px; height: 64px; color: var(--cp-text-faint); margin-bottom: 16px; }
.empty-state h1 { font-size: 1.8rem; margin: 0 0 10px; }
.empty-state p { color: var(--cp-text-muted); margin: 0 0 22px; }

/* ---------- Toast ---------- */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 3000; display: flex; flex-direction: column; gap: 10px; }
.toast {
  display: flex; align-items: center; gap: 10px;
  background: var(--cp-dark); color: #EAF3EF; border-radius: var(--radius);
  padding: 12px 18px; font: 600 14px var(--font-sans); box-shadow: var(--shadow-3);
  animation: toast-in .25s ease;
}
.toast .ic { width: 16px; height: 16px; color: var(--cp-primary-bright); }
@keyframes toast-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Footer ---------- */
.site-footer { background: var(--cp-dark); color: #B9CCC3; margin-top: auto; }
.footer-inner {
  max-width: 1660px; margin: 0 auto; padding: 44px 26px 26px;
  display: grid; grid-template-columns: 1.4fr 2fr; gap: 40px;
}
.brand-footer { color: #fff; margin-bottom: 14px; }
.brand-footer .brand-mark { color: var(--cp-primary-bright); }
.footer-brand p { font-size: 13.5px; line-height: 1.7; margin: 0 0 12px; max-width: 420px; }
.footer-free { display: flex; align-items: center; gap: 7px; color: var(--cp-primary-bright); font-weight: 700; font-size: 13px; }
.footer-free .ic { width: 14px; height: 14px; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.footer-col h3 { color: #fff; font-size: 12.5px; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 14px; }
.footer-col a { display: block; color: #B9CCC3; font-size: 13.5px; padding: 4.5px 0; text-decoration: none; }
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  max-width: 1660px; margin: 0 auto; padding: 18px 26px 26px;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: 12.5px; color: #7E948C;
  padding-bottom: calc(18px + env(safe-area-inset-bottom, 0px));
}

/* ---------- Utilities ---------- */
.muted { color: var(--cp-text-muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.flex-gap { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
[hidden] { display: none !important; }
.cp-hide { display: none; }

/* Mobile-only sidebar drawer elements (hidden on desktop) */
.sidebar-drawer-head, .drawer-quick { display: none; }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}