:root{
  --gold:#ecb537; --gold-d:#d39f24; --gold-l:#f7d478;
  --teal:#173740; --teal-2:#1e4650; --ink:#0f1520; --blue:#1289e4;
  --paper:#ffffff; --cream:#faf8f3; --mist:#f1f0ea; --line:#e7e5dd;
  --text:#232b2f; --muted:#71797f;
  --radius:18px; --radius-sm:12px;
  --shadow:0 14px 40px rgba(15,21,32,.10); --shadow-lg:0 30px 70px rgba(15,21,32,.22);
  --serif:"Iowan Old Style",Palatino,"Palatino Linotype","Book Antiqua",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--text);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
h1,h2,h3{font-family:var(--serif);line-height:1.12;color:var(--ink);margin:.2em 0 .4em;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem)}
.muted{color:var(--muted)}
.accent{color:var(--gold-d)}
.inline{display:inline}
.kicker{text-transform:uppercase;letter-spacing:.16em;font-size:.78rem;font-weight:700;color:var(--gold-d);margin:0 0 .4em}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;border:0;cursor:pointer;
  font:inherit;font-weight:650;padding:.72em 1.4em;border-radius:999px;
  transition:transform .12s var(--ease),box-shadow .25s,background .2s,color .2s;text-align:center}
.btn:active{transform:translateY(1px)}
.btn-gold{background:var(--gold);color:var(--ink);box-shadow:0 8px 22px rgba(236,181,55,.35)}
.btn-gold:hover{background:var(--gold-d);transform:translateY(-2px);box-shadow:0 12px 30px rgba(236,181,55,.45)}
.btn-outline{background:transparent;border:2px solid var(--teal);color:var(--teal)}
.btn-outline:hover{background:var(--teal);color:#fff}
.btn-ghost{background:transparent;color:var(--muted);padding:.45em .8em}
.btn-ghost:hover{color:var(--ink)}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn-ghost-light:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
.btn-lg{padding:.92em 1.8em;font-size:1.05rem}
.btn-block{width:100%}

/* Header / footer */
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:14px clamp(16px,5vw,52px);border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.82);backdrop-filter:blur(12px) saturate(1.2)}
.brand img{height:34px;width:auto}
.site-nav{display:flex;align-items:center;gap:22px}
.site-nav a:not(.btn){color:var(--ink);font-weight:550;position:relative}
.site-nav a:not(.btn):hover{color:var(--gold-d)}
.nav-user{color:var(--muted);font-size:.92rem}
.site-footer{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
  padding:34px clamp(16px,5vw,52px);background:var(--ink);color:#c7cfd4;margin-top:0}
.site-footer strong{color:#fff}

/* Landing: dark sections use light text */
body.landing{background:var(--paper)}

/* Hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(120% 120% at 85% -10%, #24525d 0%, var(--teal) 42%, var(--ink) 100%);color:#eaf1f3}
.hero-glow{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(40% 50% at 78% 30%, rgba(236,181,55,.20), transparent 70%)}
.hero-inner{position:relative;max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;
  gap:clamp(24px,4vw,60px);align-items:center;padding:clamp(40px,6vw,90px) clamp(16px,5vw,52px)}
.hero h1{color:#fff}
.hero .accent{color:var(--gold-l)}
.eyebrow{display:inline-flex;align-items:center;gap:.55em;text-transform:uppercase;letter-spacing:.14em;
  font-size:.78rem;font-weight:700;color:var(--gold-l);margin:0 0 1rem;
  background:rgba(236,181,55,.10);border:1px solid rgba(236,181,55,.28);padding:.5em 1em;border-radius:999px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(236,181,55,.25)}
.hero .lead{font-size:1.18rem;color:#cbd8dc;max-width:48ch;margin:1rem 0 0}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-trust{display:flex;align-items:center;gap:22px;margin-top:38px;flex-wrap:wrap}
.hero-trust strong{display:block;font-family:var(--serif);font-size:1.5rem;color:var(--gold-l);line-height:1}
.hero-trust span{font-size:.82rem;color:#a9b8bd}
.hero-trust .sep{width:1px;height:34px;background:rgba(255,255,255,.16)}
.hero-media{display:flex;justify-content:center}
.hero-photo{position:relative;width:min(360px,80vw)}
.hero-photo::before{content:"";position:absolute;inset:-18px -18px 22px 22px;border-radius:26px;
  background:linear-gradient(150deg,var(--gold),transparent 60%);opacity:.9;filter:blur(2px)}
.hero-photo img{position:relative;width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top center;
  border-radius:22px;box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.12)}

/* Sections */
.section{padding:clamp(48px,6vw,90px) clamp(16px,5vw,52px);max-width:1120px;margin:0 auto}
.section-head{max-width:60ch;margin-bottom:6px}
.section-lead{color:#4a555b;font-size:1.1rem;max-width:60ch}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:34px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:transform .18s var(--ease),box-shadow .25s;position:relative;overflow:hidden}
.card::after{content:"";position:absolute;left:0;top:0;height:3px;width:100%;
  background:linear-gradient(90deg,var(--gold),transparent);opacity:0;transition:opacity .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.card:hover::after{opacity:1}
.card-k{display:inline-grid;place-items:center;width:52px;height:52px;border-radius:14px;
  background:linear-gradient(150deg,var(--teal),var(--ink));color:var(--gold-l);
  font-family:var(--serif);font-size:1.7rem;font-weight:700;margin-bottom:14px;box-shadow:var(--shadow)}
.card h3{margin:.1em 0 .3em}

/* About split */
.section-split{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,64px);align-items:center}
.split-media{position:relative}
.split-media::before{content:"";position:absolute;inset:auto -16px -16px auto;width:60%;height:60%;
  border-radius:20px;background:linear-gradient(150deg,var(--gold),transparent 70%);opacity:.85;z-index:0}
.split-media img{position:relative;z-index:1;width:100%;aspect-ratio:4/5;object-fit:cover;object-position:top center;
  border-radius:20px;box-shadow:var(--shadow-lg)}
.split-text p{color:#414c52}

/* Quote band */
.quote-band{background:linear-gradient(160deg,var(--teal),var(--ink));color:#fff;
  padding:clamp(48px,7vw,96px) clamp(16px,5vw,52px)}
.quote-inner{max-width:900px;margin:0 auto;text-align:center;position:relative}
.q-mark{display:block;font-family:var(--serif);font-size:5rem;line-height:.6;color:var(--gold);opacity:.6}
.quote-band blockquote{font-family:var(--serif);font-size:clamp(1.5rem,3.4vw,2.4rem);
  line-height:1.3;margin:.2em auto .5em;max-width:20ch;color:#fff}
.quote-band cite{color:var(--gold-l);font-style:normal;letter-spacing:.1em;text-transform:uppercase;font-size:.82rem}

/* CTA band */
.cta-band{padding:clamp(40px,5vw,72px) clamp(16px,5vw,52px);background:var(--cream)}
.cta-inner{max-width:760px;margin:0 auto;text-align:center;background:var(--paper);
  border:1px solid var(--line);border-radius:24px;padding:clamp(30px,5vw,56px);box-shadow:var(--shadow)}
.cta-inner p{color:#4a555b;font-size:1.08rem;margin:.2em 0 1.4em}

/* Auth */
body.auth{background:radial-gradient(120% 120% at 80% -10%, #24525d, var(--teal) 45%, var(--ink) 100%);min-height:100vh}
.auth-wrap{min-height:calc(100vh - 150px);display:grid;place-items:center;padding:44px 16px}
.auth-card{background:#fff;border-radius:22px;box-shadow:var(--shadow-lg);padding:44px;width:100%;max-width:410px}
.auth-card.center{text-align:center}
.auth-logo{margin:0 auto 16px}
.auth-card h1{text-align:center;margin-top:0;font-size:1.8rem}
.auth-card>p.muted{text-align:center;margin-top:0}
.auth-card form{display:flex;flex-direction:column;gap:16px;margin-top:20px}
.auth-card label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:.9rem;color:var(--ink)}
.auth-card input{padding:.8em .95em;border:1.5px solid var(--line);border-radius:12px;font:inherit;transition:border .15s,box-shadow .15s}
.auth-card input:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 4px rgba(236,181,55,.22)}
.auth-foot{text-align:center;margin:20px 0 0}
.alert{background:#fdecea;border:1px solid #f5c2c0;color:#8a1c15;padding:.75em .95em;border-radius:12px;font-size:.92rem}

/* App / dashboard */
.app{max-width:1120px;margin:0 auto;padding:clamp(28px,4vw,52px) clamp(16px,5vw,52px)}
.app-head h1{margin-top:0}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:24px;margin-top:26px}
.course-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .16s var(--ease),box-shadow .25s;color:var(--text)}
.course-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.course-cover{height:150px;background:var(--teal) center/cover no-repeat;position:relative}
.course-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(15,21,32,.35))}
.course-body{padding:20px}
.course-body h3{margin:0 0 6px}
.progress{height:8px;background:var(--mist);border-radius:99px;overflow:hidden;margin-top:14px}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--gold-l))}
.progress-label{font-size:.82rem;color:var(--muted);margin:.4em 0 0}

/* Course layout */
.course-layout{display:grid;grid-template-columns:310px 1fr;min-height:70vh}
.course-side{background:var(--ink);color:#cdd6da;padding:28px 22px}
.course-side .back{color:var(--gold-l);font-weight:600}
.course-side h2{color:#fff;font-size:1.3rem}
.lesson-list{list-style:none;margin:16px 0 0;padding:0}
.lesson-list li a{display:grid;grid-template-columns:22px 1fr auto;gap:8px;align-items:center;
  color:#cdd6da;padding:11px 12px;border-radius:10px;font-size:.94rem;transition:background .15s}
.lesson-list li a:hover{background:rgba(255,255,255,.06)}
.lesson-list li.active a{background:rgba(236,181,55,.16);color:#fff}
.lesson-list li.done .tick{color:var(--gold)}
.lesson-list .tick{font-weight:700}
.course-main{padding:clamp(22px,3vw,48px)}
.lesson h1{margin-top:0}
.video{position:relative;padding-top:56.25%;border-radius:14px;overflow:hidden;margin:18px 0;background:#000}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.lesson-content{font-size:1.06rem;line-height:1.78}
.lesson-content h2{margin-top:1.4em}
.lesson-content ul{padding-left:1.2em}

@media (max-width:860px){
  .hero-inner,.section-split{grid-template-columns:1fr}
  .hero-media{order:-1;margin-bottom:10px}
  .hero-photo{width:min(300px,72vw)}
  .split-text{order:2}
  .course-layout{grid-template-columns:1fr}
  .site-nav{gap:14px}
  .site-nav a:not(.btn){display:none}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none!important}}