/* ══════════════════════════════════════════════════════════════════════════
   FGTechHub Learning Platform — design tokens + shared components
   /learn/* — the public LMS for external learners (templates/learn_*.html).

   Deliberately its own system, not a copy of the internal MMS admin theme
   (static/css/mms-enterprise.css) or the existing single-page marketing
   site (templates/website_home.html) — this is the first surface built to
   the "industrial instrumentation, not generic SaaS" direction: a
   restrained graphite/navy structure, one precise accent, no gradients,
   no floating decorative shapes, no pill-everything. Inter + Space
   Grotesk are kept from the marketing page for brand continuity; the
   palette and component language are new.
   ══════════════════════════════════════════════════════════════════════════ */

:root{
  /* Structural surfaces — deep graphite/navy, darkest at the page edge */
  --ink-950:#0A0E13;
  --ink-900:#11161E;
  --ink-800:#1A212B;
  --ink-700:#262F3B;
  --ink-600:#3A4552;
  --ink-500:#5C6774;

  /* Text on dark */
  --text-hi:#F2F5F8;
  --text-md:#C3CBD4;
  --text-lo:#8A95A3;

  /* One accent — a muted instrument amber, used sparingly (not a gradient,
     not the primary color of the page — a precise highlight) */
  --accent:#D98A3D;
  --accent-ink:#1A1206;
  --accent-dim:rgba(217,138,61,.14);

  /* Semantic */
  --success:#2FB673;
  --success-dim:rgba(47,182,115,.14);
  --danger:#E25C5C;
  --danger-dim:rgba(226,92,92,.14);
  --focus:#5BAEE8;

  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);

  /* Typography */
  --font-display:'Space Grotesk',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-mono:'JetBrains Mono',monospace;

  /* Spacing scale */
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;

  /* Shape */
  --radius-sm:6px; --radius-md:10px; --radius-lg:16px;
  --shadow-card:0 1px 2px rgba(0,0,0,.3), 0 12px 28px rgba(0,0,0,.35);

  /* Motion */
  --ease:cubic-bezier(.4,0,.2,1);
  --dur:180ms;

  --container:1120px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.learn{
  margin:0;
  font-family:var(--font-body);
  background:var(--ink-950);
  color:var(--text-hi);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
.learn a{color:inherit;text-decoration:none}
.learn img{max-width:100%;display:block}
.learn ::selection{background:var(--accent-dim);color:var(--text-hi)}

/* Respect reduced-motion: every transition in this file collapses to none */
@media (prefers-reduced-motion: reduce){
  .learn *{transition:none !important;animation:none !important}
}

/* Focus — always visible, never suppressed */
.learn a:focus-visible,
.learn button:focus-visible,
.learn input:focus-visible,
.learn textarea:focus-visible,
.learn select:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:2px;
  border-radius:var(--radius-sm);
}

/* ── Layout shell ─────────────────────────────────────────────────────── */
.learn-shell{min-height:100vh;display:flex;flex-direction:column}
.learn-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--sp-5)}
@media (max-width:640px){ .learn-container{padding:0 var(--sp-4)} }

/* ── Header ───────────────────────────────────────────────────────────── */
.learn-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,14,19,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.learn-header-inner{
  max-width:var(--container);margin:0 auto;padding:var(--sp-2) var(--sp-5);
  min-height:64px;display:flex;align-items:center;gap:var(--sp-6);
  flex-wrap:wrap;row-gap:var(--sp-2);
}
.learn-brand{display:flex;align-items:center;gap:var(--sp-3);flex-shrink:0}
.learn-brand img{height:30px;width:30px;border-radius:6px;object-fit:contain;background:#fff;padding:3px}
.learn-brand-text{font-family:var(--font-display);font-weight:700;font-size:15px;line-height:1.15}
.learn-brand-text small{display:block;font-family:var(--font-mono);font-weight:500;font-size:10px;
  color:var(--text-lo);letter-spacing:.06em;text-transform:uppercase;margin-top:1px}
.learn-nav{display:flex;align-items:center;gap:var(--sp-5);margin-left:auto;flex-wrap:wrap;row-gap:var(--sp-2)}
.learn-nav a{font-size:13.5px;font-weight:500;color:var(--text-md);transition:color var(--dur) var(--ease)}
.learn-nav a:hover{color:var(--text-hi)}
.learn-nav-user{display:flex;align-items:center;gap:var(--sp-3);flex-wrap:wrap;row-gap:var(--sp-2)}
.learn-nav-user .who{font-size:12.5px;color:var(--text-lo)}
/* Below ~480px even "Courses · Dashboard · My Account · email · Log out"
   wrapped onto one row each still crowds a phone screen — the account
   email is the one purely-decorative piece (My Account already states
   who's signed in via its own page), so it's the one dropped rather than
   wrapped further. */
@media (max-width:480px){
  .learn-nav-user .who{display:none}
}

/* ── Buttons ──────────────────────────────────────────────────────────── */
.learn-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);
  font-family:var(--font-body);font-size:13.5px;font-weight:600;
  padding:10px 20px;border-radius:var(--radius-sm);border:1px solid transparent;
  cursor:pointer;transition:background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  line-height:1.2;
}
.learn-btn:active{transform:translateY(1px)}
.learn-btn-primary{background:var(--accent);color:var(--accent-ink)}
.learn-btn-primary:hover{background:#E59A50}
.learn-btn-secondary{background:transparent;color:var(--text-hi);border-color:var(--line-strong)}
.learn-btn-secondary:hover{border-color:var(--text-lo)}
.learn-btn-block{width:100%}

/* ── Forms ────────────────────────────────────────────────────────────── */
.learn-field{margin-bottom:var(--sp-4)}
.learn-field label{
  display:block;font-size:12px;font-weight:600;color:var(--text-md);
  margin-bottom:var(--sp-2);letter-spacing:.01em;
}
.learn-field input,.learn-field textarea{
  width:100%;background:var(--ink-900);border:1px solid var(--line-strong);
  border-radius:var(--radius-sm);padding:11px 13px;font-size:14px;
  color:var(--text-hi);font-family:var(--font-body);
  transition:border-color var(--dur) var(--ease);
}
.learn-field input::placeholder,.learn-field textarea::placeholder{color:var(--text-lo)}
.learn-field input:focus,.learn-field textarea:focus{border-color:var(--accent);outline:none}
.learn-field .hint{font-size:11.5px;color:var(--text-lo);margin-top:var(--sp-2)}
.learn-field-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4)}
@media (max-width:560px){ .learn-field-row{grid-template-columns:1fr} }

/* ── Auth card ────────────────────────────────────────────────────────── */
.learn-auth-wrap{
  flex:1;display:flex;align-items:center;justify-content:center;
  padding:var(--sp-8) var(--sp-4);
}
.learn-auth-card{
  width:100%;max-width:420px;background:var(--ink-900);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:var(--sp-6);box-shadow:var(--shadow-card);
}
.learn-auth-card h1{
  font-family:var(--font-display);font-size:22px;font-weight:700;
  margin:0 0 var(--sp-1);letter-spacing:-.01em;
}
.learn-auth-card .sub{font-size:13.5px;color:var(--text-lo);margin:0 0 var(--sp-6)}
.learn-auth-foot{
  margin-top:var(--sp-5);padding-top:var(--sp-5);border-top:1px solid var(--line);
  font-size:13px;color:var(--text-lo);text-align:center;
}
.learn-auth-foot a{color:var(--accent);font-weight:600}
.learn-auth-foot a:hover{text-decoration:underline}

/* ── Flash messages ───────────────────────────────────────────────────── */
.learn-flashes{max-width:var(--container);margin:var(--sp-4) auto 0;padding:0 var(--sp-5)}
.learn-flash{
  display:flex;gap:var(--sp-3);align-items:flex-start;
  border-radius:var(--radius-sm);border:1px solid var(--line-strong);
  padding:12px 14px;font-size:13.5px;margin-bottom:var(--sp-3);
}
.learn-flash.success{background:var(--success-dim);border-color:rgba(47,182,115,.4);color:#8FE0B8}
.learn-flash.danger{background:var(--danger-dim);border-color:rgba(226,92,92,.4);color:#F3A9A9}
.learn-flash.warning{background:var(--accent-dim);border-color:rgba(217,138,61,.4);color:#F0C293}

/* ── Dashboard ────────────────────────────────────────────────────────── */
.learn-page-head{padding:var(--sp-7) 0 var(--sp-5)}
.learn-page-head h1{font-family:var(--font-display);font-size:26px;font-weight:700;margin:0 0 var(--sp-1)}
.learn-page-head .sub{font-size:14px;color:var(--text-lo)}

.learn-verify-banner{
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  background:var(--accent-dim);border:1px solid rgba(217,138,61,.35);
  border-radius:var(--radius-md);padding:var(--sp-4) var(--sp-5);
  margin-bottom:var(--sp-6);flex-wrap:wrap;
}
.learn-verify-banner p{margin:0;font-size:13.5px;color:var(--text-hi)}

.learn-empty{
  text-align:left;padding:var(--sp-7) var(--sp-5);
  border:1px dashed var(--line-strong);border-radius:var(--radius-lg);
  color:var(--text-lo);
}
.learn-empty strong{display:block;color:var(--text-hi);font-size:15px;margin-bottom:var(--sp-2)}

.learn-course-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:var(--sp-5);
}
.learn-course-card{
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-md);
  overflow:hidden;transition:border-color var(--dur) var(--ease);
}
.learn-course-card:hover{border-color:var(--line-strong)}
.learn-course-card .thumb{aspect-ratio:16/9;background:var(--ink-800);position:relative}
.learn-course-card .thumb img{width:100%;height:100%;object-fit:cover}
.learn-course-body{padding:var(--sp-4)}
.learn-course-body h3{font-size:15px;font-weight:600;margin:0 0 var(--sp-2)}
.learn-course-meta{
  display:flex;gap:var(--sp-3);font-family:var(--font-mono);font-size:11px;
  color:var(--text-lo);text-transform:uppercase;letter-spacing:.05em;
}
.learn-progress-bar{height:4px;background:var(--ink-700);border-radius:2px;margin-top:var(--sp-3);overflow:hidden}
.learn-progress-bar span{display:block;height:100%;background:var(--accent)}

/* ── Lesson viewer ────────────────────────────────────────────────────── */
.learn-lesson-layout{display:grid;grid-template-columns:280px 1fr;gap:var(--sp-7);align-items:start}
@media (max-width:860px){ .learn-lesson-layout{grid-template-columns:1fr} }
.learn-lesson-nav{
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:var(--sp-4);position:sticky;top:80px;
}
.learn-lesson-nav .mod-title{font-size:11px;font-weight:700;text-transform:uppercase;
  letter-spacing:.05em;color:var(--text-lo);margin:var(--sp-4) 0 var(--sp-2)}
.learn-lesson-nav .mod-title:first-child{margin-top:0}
.learn-lesson-nav a{
  display:flex;align-items:center;gap:var(--sp-2);
  font-size:13px;padding:7px 8px;border-radius:var(--radius-sm);
  color:var(--text-md);
}
.learn-lesson-nav a.current{background:var(--accent-dim);color:var(--text-hi);font-weight:600}
.learn-lesson-nav a:hover{background:var(--ink-800)}
.learn-lesson-nav .done-mark{color:var(--success);flex-shrink:0}
.learn-lesson-content h1{font-family:var(--font-display);font-size:24px;margin:0 0 var(--sp-2)}
.learn-lesson-content .body{font-size:15px;line-height:1.75;color:var(--text-md);
  white-space:pre-line;margin:var(--sp-5) 0 var(--sp-7)}

/* ── Footer ───────────────────────────────────────────────────────────── */
.learn-footer{
  margin-top:auto;border-top:1px solid var(--line);
  padding:var(--sp-6) 0;font-size:12.5px;color:var(--text-lo);
}
.learn-footer-inner{
  max-width:var(--container);margin:0 auto;padding:0 var(--sp-5);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:var(--sp-3);
}