/* ==========================================================================
   NETPATH — Independent CCNA Learning Platform
   Shared stylesheet for all pages
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ---------- Tokens ---------- */
:root{
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --ink:#101820;
  --accent:#18A558;
  --accent-dark:#0F7B4D;
  --blue:#2563EB;
  --text:#17202A;
  --text-muted:#667085;
  --border:#D9E0E5;
  --warning:#F59E0B;
  --error:#DC4444;
  --success:#16A34A;

  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, monospace;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 12px;

  --container: 1200px;
  --gap: 24px;

  --shadow-sm: 0 1px 2px rgba(16,24,32,0.06);
  --shadow: 0 4px 16px rgba(16,24,32,0.08);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-ui);
  font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.15;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:1rem;color:inherit;}
svg{display:block;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:4px;}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--tight{padding:56px 0;}
.section--dark{background:var(--ink);color:#EAF0EE;}
.section--photo-dark{
  background:
    linear-gradient(rgba(16,24,32,.93), rgba(16,24,32,.96)),
}
.section--surface{background:var(--surface);}
.section--border-top{border-top:1px solid var(--border);}
.section-head{max-width:640px;margin-bottom:48px;}
.section-head--wide{max-width:760px;}
.section-title{font-size:clamp(1.7rem,2.4vw,2.35rem);color:var(--ink);}
.section--dark .section-title{color:#fff;}
.section-sub{margin-top:12px;color:var(--text-muted);font-size:1.05rem;}
.section--dark .section-sub{color:#A9B4B0;}
.mono{font-family:var(--font-mono);}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap);}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}

.eyebrow{font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent-dark);display:inline-flex;align-items:center;gap:8px;}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 3px rgba(24,165,88,.18);}
.section--dark .eyebrow{color:#5FE3A6;}
.section--dark .eyebrow::before{background:#5FE3A6;box-shadow:0 0 0 3px rgba(95,227,166,.18);}

/* ---------- Backgrounds ---------- */
.bg-grid{
  background-image:
    linear-gradient(to right, rgba(16,24,32,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16,24,32,.05) 1px, transparent 1px);
  background-size:40px 40px;
}
.bg-grid--dark{
  background-image:
    linear-gradient(to right, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:40px 40px;
}
.bg-dots{
  background-image: radial-gradient(rgba(16,24,32,.14) 1px, transparent 1px);
  background-size:18px 18px;
}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:var(--radius-sm);font-weight:600;font-size:.94rem;
  border:1px solid transparent;transition:transform .15s ease, background .15s ease, border-color .15s ease;
  white-space:nowrap;}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn--primary{background:var(--ink);color:#fff;}
.btn--primary:hover{background:var(--accent-dark);}
.btn--secondary{background:transparent;color:var(--ink);border-color:var(--border);}
.btn--secondary:hover{border-color:var(--ink);}
.section--dark .btn--secondary{color:#fff;border-color:rgba(255,255,255,.28);}
.section--dark .btn--secondary:hover{border-color:#fff;}
.btn--accent{background:var(--accent);color:#fff;}
.btn--accent:hover{background:var(--accent-dark);}
.btn--ghost{background:transparent;color:var(--text-muted);padding:10px 6px;}
.btn--ghost:hover{color:var(--ink);}
.btn--sm{padding:9px 16px;font-size:.85rem;}
.btn--block{width:100%;}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}

/* ---------- Badges / pills ---------- */
.badge{display:inline-flex;align-items:center;font-family:var(--font-mono);font-size:.68rem;
  font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:4px 9px;
  border-radius:5px;border:1px solid var(--border);color:var(--text-muted);background:var(--surface);}
.badge--beginner{color:var(--accent-dark);border-color:rgba(24,165,88,.35);background:rgba(24,165,88,.07);}
.badge--intermediate{color:#92650B;border-color:rgba(245,158,11,.4);background:rgba(245,158,11,.09);}
.badge--advanced{color:#B23A3A;border-color:rgba(220,68,68,.35);background:rgba(220,68,68,.08);}
.badge--blue{color:var(--blue);border-color:rgba(37,99,235,.35);background:rgba(37,99,235,.07);}

.status-pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);
  font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--success);}
.status-pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--success);
  box-shadow:0 0 0 3px rgba(22,163,74,.18);}
.status-pill--down{color:var(--error);}
.status-pill--down::before{background:var(--error);box-shadow:0 0 0 3px rgba(220,68,68,.18);}

/* ---------- Navigation ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(245,247,248,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);}
.nav__inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;
  max-width:var(--container);margin:0 auto;}
.nav__brand{display:flex;align-items:center;gap:10px;}
.nav__mark{width:34px;height:34px;border-radius:8px;background:var(--ink);display:flex;align-items:center;
  justify-content:center;flex-shrink:0;}
.nav__mark svg{width:18px;height:18px;}
.nav__brand-text{display:flex;flex-direction:column;line-height:1.1;}
.nav__brand-name{font-weight:800;font-size:1.05rem;letter-spacing:-0.01em;color:var(--ink);}
.nav__brand-tag{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.08em;color:var(--text-muted);}
.nav__links{display:flex;align-items:center;gap:32px;}
.nav__link{position:relative;font-size:.92rem;font-weight:500;color:var(--text);padding:6px 0;}
.nav__link::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;background:var(--accent);
  transition:right .2s ease;}
.nav__link:hover::after,.nav__link.is-active::after{right:0;}
.nav__link.is-active{color:var(--ink);font-weight:600;}
.nav__actions{display:flex;align-items:center;gap:18px;}
.nav__progress{font-size:.85rem;font-weight:500;color:var(--text-muted);display:flex;align-items:center;gap:6px;}
.nav__toggle{display:none;background:none;border:1px solid var(--border);border-radius:7px;padding:8px;}
.nav__toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px 0;border-radius:2px;}
.nav__mobile{display:none;flex-direction:column;padding:8px 24px 20px;border-top:1px solid var(--border);gap:2px;}
.nav__mobile a{padding:12px 4px;font-size:.98rem;border-bottom:1px solid var(--border);}
.nav__mobile a:last-child{border-bottom:none;}
.nav.is-open .nav__mobile{display:flex;}

@media (max-width:900px){
  .nav__links{display:none;}
  .nav__toggle{display:block;}
  .nav__actions .nav__progress{display:none;}
}

/* ---------- Hero ---------- */
.hero{padding:64px 0 0;}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero__title{font-size:clamp(2.3rem,4.6vw,3.4rem);color:var(--ink);margin:18px 0 20px;}
.hero__lead{font-size:1.08rem;color:var(--text-muted);max-width:46ch;margin-bottom:32px;}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;}
.hero__visual{position:relative;border:1px solid var(--border);border-radius:var(--radius-lg);
  background:var(--surface);padding:18px;box-shadow:var(--shadow);}
.hero__visual-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;
  font-family:var(--font-mono);font-size:.68rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;}

/* Status strip */
.status-strip{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--surface);
  margin-top:56px;}
.status-strip__inner{max-width:var(--container);margin:0 auto;padding:0 24px;display:grid;
  grid-template-columns:repeat(4,1fr);}
.status-strip__item{padding:20px 24px;border-left:1px solid var(--border);}
.status-strip__item:first-child{border-left:none;}
.status-strip__value{font-family:var(--font-mono);font-weight:700;font-size:1.05rem;color:var(--ink);}
.status-strip__label{font-family:var(--font-mono);font-size:.66rem;color:var(--text-muted);letter-spacing:.06em;
  text-transform:uppercase;margin-top:3px;}
@media (max-width:760px){
  .status-strip__inner{grid-template-columns:repeat(2,1fr);}
  .status-strip__item:nth-child(3){border-left:none;}
}

/* Topology SVG shared */
.topology text{font-family:var(--font-mono);}
.topology .node-label{font-size:9px;fill:var(--text-muted);}
.topology .link-label{font-size:8px;fill:#98A2AC;}
.topology .link-line{stroke:var(--border);stroke-width:1.5;fill:none;}
.topology .link-line--active{stroke:var(--accent);stroke-width:1.5;}
.topology .node-box{fill:var(--surface);stroke:var(--border);stroke-width:1.3;}
.topology .node-box.node-active{stroke:var(--accent);}
.topology .node-icon{fill:none;stroke:var(--ink);stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;}
.topology .pulse{animation:pulseDot 2.6s ease-in-out infinite;}
.topology .packet{animation:travel 3.2s linear infinite;}
@keyframes pulseDot{0%,100%{opacity:1;}50%{opacity:.35;}}
@keyframes travel{
  0%{offset-distance:0%;opacity:0;}
  6%{opacity:1;}
  94%{opacity:1;}
  100%{offset-distance:100%;opacity:0;}
}
.packet-path{offset-rotate:0deg;}

/* ---------- Learning path ---------- */
.path{position:relative;}
.path__track{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative;}
.path__track::before{content:"";position:absolute;top:19px;left:5%;right:5%;height:2px;
  background:repeating-linear-gradient(to right, var(--border) 0 6px, transparent 6px 11px);}
.path__stage{position:relative;padding:0 14px 0 0;}
.path__stage-num{width:38px;height:38px;border-radius:50%;background:var(--surface);border:1.5px solid var(--ink);
  color:var(--ink);font-family:var(--font-mono);font-weight:700;font-size:.85rem;display:flex;align-items:center;
  justify-content:center;position:relative;z-index:1;margin-bottom:18px;}
.path__stage.is-complete .path__stage-num{background:var(--ink);color:#fff;}
.path__stage-title{font-weight:700;font-size:1.02rem;color:var(--ink);margin-bottom:6px;}
.path__stage-desc{font-size:.88rem;color:var(--text-muted);margin-bottom:14px;min-height:56px;}
.path__stage-meta{display:flex;align-items:center;justify-content:space-between;font-family:var(--font-mono);
  font-size:.7rem;color:var(--text-muted);border-top:1px solid var(--border);padding-top:10px;}
.path__stage-check{color:var(--accent-dark);}
@media (max-width:980px){
  .path__track{grid-template-columns:1fr;gap:28px;}
  .path__track::before{display:none;}
}

/* ---------- Editorial blocks (Learn/Configure/Test) ---------- */
.editorial{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;}
.editorial__block{background:var(--surface);padding:36px 32px;}
.editorial__num{font-family:var(--font-mono);color:var(--text-muted);font-size:.8rem;margin-bottom:22px;}
.editorial__figure{height:132px;margin-bottom:24px;border:1px solid var(--border);border-radius:var(--radius);
  background:var(--bg);display:flex;align-items:center;justify-content:center;overflow:hidden;}
.editorial__title{font-size:1.2rem;color:var(--ink);margin-bottom:10px;}
.editorial__text{color:var(--text-muted);font-size:.94rem;}
@media (max-width:900px){.editorial{grid-template-columns:1fr;}}

/* ---------- Network visualization (interactive) ---------- */
.netviz{display:grid;grid-template-columns:1.3fr .9fr;gap:32px;align-items:start;}
.netviz__stage{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);padding:20px;}
.netviz__node{cursor:pointer;}
.netviz__node .node-box{transition:stroke .15s ease;}
.netviz__node:hover .node-box, .netviz__node.is-active .node-box{stroke:var(--accent);stroke-width:1.8;}
.netviz__link{cursor:pointer;}
.netviz__link:hover .link-line, .netviz__link.is-active .link-line{stroke:var(--blue);stroke-width:2;}
.netviz__panel{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--ink);color:#EAF0EE;
  padding:24px;min-height:260px;}
.netviz__panel-title{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;
  color:#7FE8B6;margin-bottom:16px;}
.netviz__panel-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.1);
  font-size:.88rem;}
.netviz__panel-row:last-child{border-bottom:none;}
.netviz__panel-row span:first-child{color:#9AA6A2;}
.netviz__panel-row span:last-child{font-family:var(--font-mono);color:#fff;}
.netviz__hint{color:#8A9490;font-size:.82rem;margin-top:16px;}
@media (max-width:900px){.netviz{grid-template-columns:1fr;}}

/* ---------- Cards (generic) ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;}

/* ---------- Content library ---------- */
.library-toolbar{display:flex;flex-direction:column;gap:18px;margin-bottom:40px;}
.search-field{position:relative;max-width:480px;}
.search-field input{width:100%;padding:13px 16px 13px 42px;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface);font-size:.95rem;}
.search-field input:focus{border-color:var(--ink);}
.search-field svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-muted);}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;}
.filter-chip{padding:8px 15px;border:1px solid var(--border);border-radius:100px;font-size:.84rem;font-weight:500;
  color:var(--text-muted);background:var(--surface);transition:all .15s ease;}
.filter-chip:hover{border-color:var(--ink);color:var(--ink);}
.filter-chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink);}

.topic-index{border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);}
.topic-row{display:grid;grid-template-columns:56px 1fr 200px;gap:24px;padding:28px;border-bottom:1px solid var(--border);
  align-items:start;transition:background .15s ease;}
.topic-row:last-child{border-bottom:none;}
.topic-row:hover{background:#FBFCFC;}
.topic-row__num{font-family:var(--font-mono);font-size:1.1rem;color:var(--text-muted);font-weight:600;}
.topic-row__cat{margin-bottom:8px;}
.topic-row__title{font-size:1.2rem;color:var(--ink);margin-bottom:12px;}
.topic-row__list{display:flex;flex-wrap:wrap;gap:8px;}
.topic-row__tag{font-size:.78rem;color:var(--text-muted);background:var(--bg);border:1px solid var(--border);
  padding:4px 10px;border-radius:5px;}
.topic-row__meta{display:flex;flex-direction:column;gap:10px;font-family:var(--font-mono);font-size:.76rem;
  color:var(--text-muted);align-items:flex-start;}
.topic-row__meta strong{color:var(--ink);font-weight:700;}
.progress-bar{width:100%;height:5px;border-radius:100px;background:var(--border);overflow:hidden;}
.progress-bar__fill{height:100%;background:var(--accent);border-radius:100px;}
@media (max-width:760px){
  .topic-row{grid-template-columns:1fr;gap:14px;}
  .topic-row__meta{flex-direction:row;flex-wrap:wrap;gap:16px;}
}

/* ---------- Content detail (article) ---------- */
.article-layout{display:grid;grid-template-columns:1fr 220px;gap:56px;align-items:start;}
.article__meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px;}
.article__title{font-size:clamp(1.7rem,3vw,2.3rem);color:var(--ink);margin-bottom:36px;}
.article__content{max-width:70ch;}
.article__content h2{font-size:1.4rem;color:var(--ink);margin:40px 0 14px;}
.article__content h3{font-size:1.12rem;color:var(--ink);margin:28px 0 10px;}
.article__content p{color:var(--text);margin-bottom:16px;font-size:1rem;}
.article__content ul{margin:0 0 16px;padding-left:0;}
.article__content ul li{position:relative;padding-left:22px;margin-bottom:9px;color:var(--text);}
.article__content ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--accent);
  border-radius:1px;}

.callout{border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--radius-sm);
  padding:18px 20px;margin:24px 0;background:#F5FBF7;}
.callout__label{font-family:var(--font-mono);font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent-dark);margin-bottom:6px;}
.callout p{color:var(--text);font-size:.94rem;margin:0;}
.callout--warn{border-left-color:var(--warning);background:#FFFAF0;}
.callout--warn .callout__label{color:#92650B;}

.terminal{background:#0C1116;border-radius:var(--radius);overflow:hidden;margin:24px 0;border:1px solid #1E2731;}
.terminal__bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#141C23;border-bottom:1px solid #1E2731;}
.terminal__dot{width:9px;height:9px;border-radius:50%;background:#3A4650;}
.terminal__title{margin-left:8px;font-family:var(--font-mono);font-size:.72rem;color:#7A8894;}
.terminal__body{padding:18px 20px;font-family:var(--font-mono);font-size:.86rem;line-height:1.85;overflow-x:auto;white-space:pre-wrap;}
.terminal__body .c-prompt{color:#5FE3A6;}
.terminal__body .c-cmd{color:#EAF0EE;}
.terminal__body .c-comment{color:#5C6B77;}
.terminal__body .c-out{color:#9AA6B2;}
.terminal__cursor{display:inline-block;width:7px;height:14px;background:#5FE3A6;vertical-align:middle;
  animation:blink 1.1s step-end infinite;}
@keyframes blink{50%{opacity:0;}}

.quiz-inline{border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin:28px 0;background:var(--bg);}
.quiz-inline__label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text-muted);margin-bottom:10px;}
.quiz-inline__q{font-weight:600;color:var(--ink);margin-bottom:14px;}
.quiz-inline__opts{display:flex;flex-direction:column;gap:8px;}
.qopt{display:flex;align-items:center;gap:10px;padding:11px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface);font-size:.9rem;}
.qopt:hover{border-color:var(--ink);}
.qopt.is-correct{border-color:var(--success);background:#F1FAF3;}
.qopt.is-wrong{border-color:var(--error);background:#FDF3F3;}
.qopt__key{font-family:var(--font-mono);font-weight:700;color:var(--text-muted);}

.toc{position:sticky;top:96px;border-left:1px solid var(--border);padding-left:20px;}
.toc__label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text-muted);margin-bottom:14px;}
.toc__link{display:block;padding:7px 0;font-size:.88rem;color:var(--text-muted);border-left:2px solid transparent;
  margin-left:-21px;padding-left:19px;}
.toc__link:hover{color:var(--ink);}
.toc__link.is-active{color:var(--ink);font-weight:600;border-left-color:var(--accent);}
@media (max-width:900px){.article-layout{grid-template-columns:1fr;}.toc{display:none;}}

/* ---------- Lab dashboard ---------- */
.lab-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.lab-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;
  display:flex;flex-direction:column;gap:16px;transition:border-color .15s ease, transform .15s ease;}
.lab-card:hover{border-color:var(--ink);transform:translateY(-2px);}
.lab-card__top{display:flex;justify-content:space-between;align-items:flex-start;}
.lab-card__id{font-family:var(--font-mono);font-size:.72rem;color:var(--text-muted);letter-spacing:.06em;}
.lab-card__title{font-size:1.15rem;color:var(--ink);margin-top:4px;}
.lab-card__mini{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);height:88px;
  display:flex;align-items:center;justify-content:center;}
.lab-card__objective{color:var(--text-muted);font-size:.88rem;}
.lab-card__meta{display:flex;gap:16px;font-family:var(--font-mono);font-size:.74rem;color:var(--text-muted);
  border-top:1px solid var(--border);padding-top:14px;}
.lab-card__meta b{color:var(--ink);}
.lab-card__footer{display:flex;justify-content:space-between;align-items:center;}
@media (max-width:760px){.lab-grid{grid-template-columns:1fr;}}

/* ---------- Lab workspace ---------- */
.lab-workspace{display:grid;grid-template-columns:280px 1fr 340px;gap:1px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;}
.lab-panel{background:var(--surface);padding:22px;}
.lab-panel--topology{background:var(--bg);display:flex;flex-direction:column;}
.lab-panel--terminal{background:#0C1116;padding:0;}
.lab-panel__label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.07em;text-transform:uppercase;
  color:var(--text-muted);margin-bottom:18px;}
.lab-panel--terminal .lab-panel__label{padding:16px 20px 0;color:#7A8894;}
.instruction-list li{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--border);font-size:.9rem;}
.instruction-list li:last-child{border-bottom:none;}
.instruction-list__num{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--border);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.7rem;color:var(--text-muted);}
.instruction-list li.is-done .instruction-list__num{background:var(--accent);border-color:var(--accent);color:#fff;}
.instruction-list li.is-done span.step-text{color:var(--text-muted);text-decoration:line-through;}
.workspace-topo-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:12px 0;}
.workspace-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.lab-terminal-body{padding:18px 20px;font-family:var(--font-mono);font-size:.82rem;line-height:1.8;color:#EAF0EE;
  height:280px;overflow-y:auto;white-space:pre-wrap;}
.lab-terminal-input{display:flex;align-items:center;gap:8px;border-top:1px solid #1E2731;padding:14px 20px;}
.lab-terminal-input input{flex:1;background:transparent;border:none;color:#EAF0EE;font-family:var(--font-mono);
  font-size:.82rem;}
.lab-terminal-input input::placeholder{color:#526069;}
.lab-terminal-input .c-prompt{font-family:var(--font-mono);color:#5FE3A6;font-size:.82rem;}
.lab-check{margin:18px 22px 22px;grid-column:1/-1;}
@media (max-width:1080px){
  .lab-workspace{grid-template-columns:1fr;}
}

/* ---------- Practice test landing ---------- */
.exam-config{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--ink);color:#fff;
  padding:40px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:28px;}
.exam-config__stats{display:flex;gap:44px;flex-wrap:wrap;}
.exam-config__stat-value{font-family:var(--font-mono);font-size:1.6rem;font-weight:700;}
.exam-config__stat-label{font-family:var(--font-mono);font-size:.68rem;color:#8FA098;letter-spacing:.06em;
  text-transform:uppercase;margin-top:4px;}

.mode-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:32px;}
.mode-card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;background:var(--surface);
  display:flex;flex-direction:column;gap:14px;transition:border-color .15s ease;}
.mode-card:hover{border-color:var(--ink);}
.mode-card__title{font-size:1.05rem;color:var(--ink);}
.mode-card__meta{font-family:var(--font-mono);font-size:.76rem;color:var(--text-muted);display:flex;gap:14px;}
.mode-card__desc{font-size:.86rem;color:var(--text-muted);flex:1;}
@media (max-width:980px){.mode-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:600px){.mode-grid{grid-template-columns:1fr;}}

/* ---------- Question interface ---------- */
.quiz-shell{display:grid;grid-template-columns:1fr 260px;gap:32px;align-items:start;}
.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;font-family:var(--font-mono);
  font-size:.82rem;color:var(--text-muted);}
.quiz-header__timer{font-weight:700;color:var(--ink);}
.quiz-progress{width:100%;height:5px;background:var(--border);border-radius:100px;margin-bottom:36px;overflow:hidden;}
.quiz-progress__fill{height:100%;background:var(--accent);border-radius:100px;transition:width .3s ease;}
.quiz-question{font-size:1.3rem;color:var(--ink);margin-bottom:28px;line-height:1.4;}
.quiz-options{display:flex;flex-direction:column;gap:12px;margin-bottom:32px;}
.quiz-option{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--border);
  border-radius:var(--radius-sm);background:var(--surface);text-align:left;width:100%;transition:all .12s ease;}
.quiz-option:hover{border-color:var(--ink);}
.quiz-option.is-selected{border-color:var(--blue);background:#EFF4FE;}
.quiz-option__key{font-family:var(--font-mono);font-weight:700;color:var(--text-muted);width:20px;flex-shrink:0;}
.quiz-option.is-selected .quiz-option__key{color:var(--blue);}
.quiz-option__cmd{font-family:var(--font-mono);font-size:.92rem;}
.quiz-controls{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;}
.quiz-controls__group{display:flex;gap:10px;}

.quiz-nav{border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;background:var(--surface);
  position:sticky;top:96px;}
.quiz-nav__label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text-muted);margin-bottom:14px;}
.quiz-nav__grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:18px;}
.quiz-nav__item{aspect-ratio:1;border:1px solid var(--border);border-radius:6px;display:flex;align-items:center;
  justify-content:center;font-family:var(--font-mono);font-size:.78rem;color:var(--text-muted);background:var(--bg);}
.quiz-nav__item.is-current{border-color:var(--ink);color:var(--ink);font-weight:700;background:var(--surface);}
.quiz-nav__item.is-answered{background:rgba(24,165,88,.1);border-color:rgba(24,165,88,.35);color:var(--accent-dark);}
.quiz-nav__item.is-marked{background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.45);color:#92650B;}
.quiz-nav__legend{display:flex;flex-direction:column;gap:8px;font-size:.78rem;color:var(--text-muted);}
.quiz-nav__legend span{display:flex;align-items:center;gap:8px;}
.legend-dot{width:9px;height:9px;border-radius:3px;background:var(--bg);border:1px solid var(--border);}
.legend-dot--answered{background:rgba(24,165,88,.25);border-color:rgba(24,165,88,.5);}
.legend-dot--marked{background:rgba(245,158,11,.25);border-color:rgba(245,158,11,.5);}
@media (max-width:900px){.quiz-shell{grid-template-columns:1fr;}.quiz-nav{position:static;}}

/* ---------- Results dashboard ---------- */
.results-hero{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:center;padding:44px;
  border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);}
.results-score{text-align:center;border-right:1px solid var(--border);padding-right:40px;}
.results-score__value{font-family:var(--font-mono);font-size:3.4rem;font-weight:700;color:var(--ink);}
.results-score__of{color:var(--text-muted);font-family:var(--font-mono);font-size:.9rem;}
.results-score__msg{font-size:1.2rem;font-weight:700;color:var(--ink);margin-bottom:10px;}
.results-stats{display:flex;gap:40px;flex-wrap:wrap;}
.results-stat__value{font-family:var(--font-mono);font-size:1.5rem;font-weight:700;color:var(--ink);}
.results-stat__label{font-family:var(--font-mono);font-size:.7rem;color:var(--text-muted);letter-spacing:.06em;
  text-transform:uppercase;margin-top:4px;}

.results-breakdown{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);
  padding:32px;margin-top:24px;}
.breakdown-row{display:grid;grid-template-columns:200px 1fr 56px;gap:18px;align-items:center;padding:14px 0;
  border-bottom:1px solid var(--border);}
.breakdown-row:last-child{border-bottom:none;}
.breakdown-row__label{font-size:.9rem;color:var(--ink);}
.breakdown-row__value{font-family:var(--font-mono);font-size:.85rem;color:var(--text-muted);text-align:right;}
@media (max-width:760px){
  .results-hero{grid-template-columns:1fr;}
  .results-score{border-right:none;border-bottom:1px solid var(--border);padding-right:0;padding-bottom:28px;}
  .breakdown-row{grid-template-columns:1fr;gap:8px;}
  .breakdown-row__value{text-align:left;}
}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start;}
.form-field{margin-bottom:20px;}
.form-field label{display:block;font-size:.82rem;font-weight:600;color:var(--ink);margin-bottom:8px;}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:13px 14px;border:1px solid var(--border);
  border-radius:var(--radius-sm);background:var(--surface);}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--ink);}
.form-field textarea{resize:vertical;min-height:130px;}
.contact-panel{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);position:relative;
  min-height:420px;background:var(--ink);}
.contact-panel__photo{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;opacity:.34;}
.contact-panel__overlay{position:relative;height:100%;padding:32px;display:flex;flex-direction:column;
  justify-content:space-between;color:#fff;}
.contact-panel__msg{font-family:var(--font-mono);font-size:.85rem;color:#7FE8B6;display:flex;align-items:center;gap:8px;}
.contact-info{display:flex;flex-direction:column;gap:10px;font-size:.92rem;}
.contact-info a{color:#fff;}
.contact-info a:hover{color:#7FE8B6;}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr;}}

/* ---------- Footer ---------- */
.footer{
  background:
    linear-gradient(rgba(16,24,32,.95), rgba(16,24,32,.97)),
    url('https://www.wemplatehub.com/wp-content/uploads/2026/08/Cabling.png') center/cover no-repeat;
  color:#C7D0CD;padding:64px 0 0;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.1);}
.footer__brand-name{font-weight:800;font-size:1.15rem;color:#fff;}
.footer__brand-tag{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.08em;color:#7FE8B6;margin:6px 0 16px;}
.footer__desc{font-size:.88rem;color:#8FA098;max-width:34ch;}
.footer__col-title{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.07em;text-transform:uppercase;
  color:#6E7E76;margin-bottom:18px;}
.footer__col a{display:block;font-size:.9rem;color:#C7D0CD;padding:6px 0;}
.footer__col a:hover{color:#fff;}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding:22px 0;flex-wrap:wrap;gap:10px;}
.footer__copy{font-size:.82rem;color:#6E7E76;}
.footer__status{font-family:var(--font-mono);font-size:.72rem;color:#5FE3A6;display:flex;align-items:center;gap:7px;}
.footer__status::before{content:"";width:6px;height:6px;border-radius:50%;background:#5FE3A6;
  box-shadow:0 0 0 3px rgba(95,227,166,.18);}
@media (max-width:900px){
  .footer__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .footer__grid{grid-template-columns:1fr;}
}

/* ---------- Responsive: global ---------- */
@media (max-width:980px){
  .hero__grid{grid-template-columns:1fr;gap:40px;}
  .editorial{grid-template-columns:1fr;}
  .grid-2, .grid-3{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .section{padding:60px 0;}
  .lab-workspace{grid-template-columns:1fr;}
}