/* ==========================================================================
   VEP Learn — Design Tokens
   Palette matches ONE VEP portal brand blue (#1E3A8A) with an added
   amber "pass mark" accent for exam/certification energy.
   ========================================================================== */
:root{
  --navy-900:#0B1530;
  --navy-800:#111d3f;
  --blue-700:#1E3A8A;
  --blue-500:#2F5CE0;
  --amber-500:#F5A623;
  --amber-400:#FFC15C;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --ink-900:#0F172A;
  --ink-600:#48566E;
  --ink-400:#8592A8;
  --line:#E3E8F2;
  --success:#1F9D63;

  --font-display:'Sora', system-ui, sans-serif;
  --font-body:'Inter', system-ui, sans-serif;
  --font-mono:'JetBrains Mono', ui-monospace, monospace;

  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 8px 24px -12px rgba(15,23,42,.12);
  --shadow-lift:0 20px 45px -20px rgba(11,21,48,.35);
  --container:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink-900);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);margin:0 0 .5em;line-height:1.15;color:var(--ink-900)}
p{margin:0 0 1em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

.skip-link{
  position:absolute;left:-999px;top:0;background:var(--amber-500);color:var(--navy-900);
  padding:10px 16px;z-index:1000;font-weight:600;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0}

:focus-visible{outline:3px solid var(--amber-400);outline-offset:2px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-display);font-weight:600;font-size:.95rem;
  padding:13px 24px;border-radius:999px;border:2px solid transparent;
  cursor:pointer;transition:transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--amber-500);color:var(--navy-900);box-shadow:0 10px 24px -10px rgba(245,166,35,.6)}
.btn-primary:hover{background:var(--amber-400)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-outline{background:transparent;color:var(--blue-700);border-color:var(--blue-700)}
.btn-outline:hover{background:var(--blue-700);color:#fff}
.btn-block{width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,21,48,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{border-radius:8px}
.brand-name{font-family:var(--font-display);font-weight:700;font-size:1.15rem;color:#fff;letter-spacing:.01em}
.brand-accent{color:var(--amber-500)}

.main-nav ul{display:flex;align-items:center;gap:6px}
.main-nav > ul > li > a{
  color:rgba(255,255,255,.85);font-weight:500;font-size:.95rem;
  padding:10px 14px;border-radius:8px;display:flex;align-items:center;gap:4px;
  transition:background .15s ease, color .15s ease;
}
.main-nav > ul > li > a:hover{background:rgba(255,255,255,.08);color:#fff}
.caret{font-size:.7em}

.has-dropdown{position:relative}
.dropdown{
  position:absolute;top:calc(100% + 8px);left:0;min-width:220px;
  background:var(--surface);border-radius:var(--radius-m);box-shadow:var(--shadow-lift);
  padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .15s ease, transform .15s ease, visibility .15s ease;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown li a{
  display:block;padding:10px 12px;border-radius:8px;color:var(--ink-900);font-size:.92rem;font-weight:500;
}
.dropdown li a:hover{background:var(--bg);color:var(--blue-700)}

.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;background:none;border:none;cursor:pointer}
.nav-toggle span{width:22px;height:2px;background:#fff;border-radius:2px;transition:.2s}
.mobile-nav{display:none}

@media (max-width:860px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .mobile-nav{
    display:block;max-height:0;overflow:hidden;background:var(--navy-800);
    transition:max-height .25s ease;
  }
  .mobile-nav.open{max-height:420px}
  .mobile-nav ul{padding:8px 24px 18px;display:flex;flex-direction:column;gap:2px}
  .mobile-nav a{display:block;padding:12px 4px;color:rgba(255,255,255,.9);font-weight:500;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  background:radial-gradient(120% 140% at 15% 0%, var(--blue-700) 0%, var(--navy-900) 55%, var(--navy-900) 100%);
  color:#fff;padding:76px 0 90px;position:relative;overflow:hidden;
}
.hero-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.8rem;
  color:var(--amber-400);letter-spacing:.06em;text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--amber-500);box-shadow:0 0 0 4px rgba(245,166,35,.2)}
.hero h1{font-size:clamp(2.1rem,4vw,3.1rem);color:#fff;max-width:19ch}
.hero h1 em{font-style:normal;color:var(--amber-400)}
.hero-sub{font-size:1.08rem;color:rgba(255,255,255,.78);max-width:46ch;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap}
.hero-meta div{font-family:var(--font-mono)}
.hero-meta strong{display:block;font-size:1.4rem;color:#fff}
.hero-meta span{font-size:.8rem;color:rgba(255,255,255,.6)}

/* Signature element: mock terminal */
.terminal{
  background:#0D1526;border-radius:var(--radius-l);border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow-lift);overflow:hidden;
}
.terminal-bar{
  display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(255,255,255,.04);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.terminal-bar span{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.15)}
.terminal-bar span:nth-child(1){background:#FF5F57}
.terminal-bar span:nth-child(2){background:#FEBC2E}
.terminal-bar span:nth-child(3){background:#28C840}
.terminal-title{margin-left:8px;font-family:var(--font-mono);font-size:.78rem;color:rgba(255,255,255,.4)}
.terminal-body{
  padding:22px 20px 28px;font-family:var(--font-mono);font-size:.86rem;line-height:1.9;
  min-height:230px;color:#D7E1F5;
}
.terminal-body .line{white-space:pre-wrap;word-break:break-word}
.terminal-body .prompt{color:var(--amber-400)}
.terminal-body .out{color:#8FE6A8}
.terminal-body .muted{color:#6C7B9C}
.cursor{display:inline-block;width:7px;height:1em;background:var(--amber-400);vertical-align:text-bottom;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}

@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr}
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{max-width:640px;margin:0 auto 48px;text-align:center}
.section-head.left{margin:0 0 40px;text-align:left}
.kicker{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-700);font-weight:600;margin-bottom:10px;display:block}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.section-head p{color:var(--ink-600);font-size:1.02rem}
.bg-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* Course cards */
.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.course-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:28px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:14px;
  transition:transform .18s ease, box-shadow .18s ease;
}
.course-card.active:hover{transform:translateY(-4px);box-shadow:0 24px 48px -24px rgba(15,23,42,.22)}
.course-icon{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, var(--blue-700), var(--blue-500));color:#fff;font-family:var(--font-display);font-weight:700;
}
.course-card h3{font-size:1.2rem}
.course-card p{color:var(--ink-600);font-size:.94rem;margin-bottom:4px}
.course-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.tag{
  font-family:var(--font-mono);font-size:.72rem;padding:4px 10px;border-radius:999px;
  background:var(--bg);color:var(--ink-600);border:1px solid var(--line);
}
.course-card.disabled{opacity:.6}
.badge-soon{
  align-self:flex-start;font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;
  background:#EEF1F8;color:var(--ink-400);padding:5px 10px;border-radius:999px;
}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);padding:30px 26px;box-shadow:var(--shadow-card)}
.step-num{font-family:var(--font-mono);color:var(--amber-500);font-weight:600;font-size:.85rem;margin-bottom:10px;display:block}
.step h3{font-size:1.1rem}
.step p{color:var(--ink-600);font-size:.93rem;margin:0}
@media (max-width:860px){.steps{grid-template-columns:1fr}}

/* Feature trio (materials/exams/sim on homepage) */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{padding:26px;border-radius:var(--radius-m);border:1px solid var(--line);background:var(--bg)}
.feature h3{font-size:1.05rem;margin-bottom:8px}
.feature p{color:var(--ink-600);font-size:.92rem;margin:0}
@media (max-width:860px){.feature-grid{grid-template-columns:1fr}}

/* ==========================================================================
   Breadcrumb / course header
   ========================================================================== */
.breadcrumb{font-family:var(--font-mono);font-size:.82rem;color:var(--ink-400);padding:20px 0 0}
.breadcrumb a{color:var(--blue-700)}
.breadcrumb span{margin:0 6px}

.course-hero{
  background:linear-gradient(160deg, var(--navy-900), var(--blue-700) 120%);color:#fff;
  padding:48px 0 56px;margin-bottom:0;
}
.course-hero h1{color:#fff;font-size:clamp(1.9rem,3.5vw,2.6rem)}
.course-hero p{color:rgba(255,255,255,.8);max-width:60ch}
.course-hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 26px}
.course-hero-tags .tag{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2);color:#fff}

.subnav{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:72px;z-index:40}
.subnav ul{display:flex;gap:4px;max-width:var(--container);margin:0 auto;padding:0 24px;overflow-x:auto}
.subnav a{
  display:block;padding:16px 16px;font-weight:600;font-size:.92rem;color:var(--ink-600);
  border-bottom:3px solid transparent;white-space:nowrap;
}
.subnav a:hover{color:var(--blue-700)}
.subnav a.is-active{color:var(--blue-700);border-color:var(--amber-500)}

/* ==========================================================================
   Materials (accordion)
   ========================================================================== */
.module{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);margin-bottom:14px;overflow:hidden}
.module-toggle{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:none;cursor:pointer;text-align:left;font-family:var(--font-body);
}
.module-toggle-left{display:flex;align-items:center;gap:14px}
.module-index{font-family:var(--font-mono);color:var(--blue-700);font-weight:600;font-size:.85rem;background:#EEF2FF;padding:4px 9px;border-radius:6px}
.module-toggle h3{font-size:1.02rem;margin:0}
.module-toggle p{margin:2px 0 0;font-size:.82rem;color:var(--ink-400)}
.module-chevron{transition:transform .2s ease;color:var(--ink-400);flex:none}
.module.open .module-chevron{transform:rotate(180deg)}
.module-panel{max-height:0;overflow:hidden;transition:max-height .25s ease}
.module.open .module-panel{max-height:1400px}
.module-panel-inner{padding:0 22px 24px 68px;color:var(--ink-600);font-size:.95rem}
.module-panel-inner h4{font-family:var(--font-body);font-weight:600;color:var(--ink-900);margin:16px 0 6px;font-size:.95rem}
.module-panel-inner ul{margin:0 0 12px;padding-left:20px;list-style:disc}
.module-panel-inner li{margin-bottom:4px}
.module-panel-inner code{
  font-family:var(--font-mono);background:var(--bg);padding:2px 6px;border-radius:4px;font-size:.85em;
}

/* ==========================================================================
   Exam
   ========================================================================== */
.exam-shell{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);box-shadow:var(--shadow-card);overflow:hidden}
.exam-progress-track{height:6px;background:var(--line)}
.exam-progress-fill{height:100%;background:linear-gradient(90deg,var(--blue-700),var(--amber-500));width:0%;transition:width .3s ease}
.exam-body{padding:36px}
.exam-meta{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.8rem;color:var(--ink-400);margin-bottom:18px}
.exam-question{font-size:1.15rem;margin-bottom:22px}
.exam-options{display:flex;flex-direction:column;gap:10px;margin-bottom:28px}
.exam-option{
  display:flex;align-items:flex-start;gap:12px;padding:15px 16px;border:1.5px solid var(--line);
  border-radius:var(--radius-s);cursor:pointer;transition:.15s;background:var(--bg);
}
.exam-option:hover{border-color:var(--blue-500)}
.exam-option input{margin-top:3px}
.exam-option.correct{border-color:var(--success);background:#EAF9F0}
.exam-option.incorrect{border-color:#D33A3A;background:#FDECEC}
.exam-footer{display:flex;justify-content:space-between;align-items:center}
.exam-feedback{font-size:.9rem;margin-top:10px;font-weight:600}
.exam-feedback.correct{color:var(--success)}
.exam-feedback.incorrect{color:#D33A3A}
.exam-result{text-align:center;padding:20px 0}
.exam-result .score{font-family:var(--font-display);font-size:3.4rem;font-weight:800;color:var(--blue-700)}
.exam-result p{color:var(--ink-600)}

/* ==========================================================================
   Simulator
   ========================================================================== */
.sim-shell{
  background:#0D1526;border-radius:var(--radius-l);border:1px solid var(--line);box-shadow:var(--shadow-card);overflow:hidden;
}
.sim-output{
  height:420px;overflow-y:auto;padding:20px;font-family:var(--font-mono);font-size:.86rem;color:#D7E1F5;line-height:1.8;
}
.sim-output .out{color:#8FE6A8;white-space:pre-wrap}
.sim-output .err{color:#FF8A80}
.sim-output .cmdline{color:#fff}
.sim-output .cmdline .prompt{color:var(--amber-400);margin-right:6px}
.sim-inputrow{display:flex;align-items:center;gap:8px;padding:14px 20px;border-top:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.02)}
.sim-inputrow .prompt{font-family:var(--font-mono);color:var(--amber-400)}
.sim-inputrow input{
  flex:1;background:none;border:none;color:#fff;font-family:var(--font-mono);font-size:.9rem;outline:none;
}
.sim-hints{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.sim-hint{
  font-family:var(--font-mono);font-size:.78rem;background:var(--surface);border:1px solid var(--line);
  padding:7px 12px;border-radius:999px;cursor:pointer;color:var(--blue-700);
}
.sim-hint:hover{background:var(--bg)}

/* ==========================================================================
   CTA band + Footer
   ========================================================================== */
.cta-band{
  background:linear-gradient(120deg,var(--blue-700),var(--navy-900));color:#fff;border-radius:var(--radius-l);
  padding:52px 44px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;margin-bottom:6px;font-size:1.6rem}
.cta-band p{color:rgba(255,255,255,.78);margin:0}

.site-footer{background:var(--navy-900);color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px 48px;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;
}
.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{font-size:.86rem;color:rgba(255,255,255,.55);max-width:32ch}
.footer-col h3{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:14px;font-family:var(--font-mono);font-weight:500}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:.9rem;color:rgba(255,255,255,.65)}
.footer-col a:hover{color:var(--amber-400)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 24px;text-align:center;font-size:.82rem;color:rgba(255,255,255,.45);
}
@media (max-width:860px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;text-align:center}
}
@media (max-width:560px){
  .footer-inner{grid-template-columns:1fr}
  .exam-body{padding:24px}
}