/* Optimum Courses — matches the site's ink / red / paper palette */
.otc-courses,.otc-grid,.otc-single,.otc-access,.otc-modal,.otc-resend,.otc-empty,.otc-archive{
  --otc-ink:#0B1324;--otc-navy:#16233F;--otc-paper:#F7F5F0;--otc-line:#E5E1D8;--otc-text:#3B4456;--otc-muted:#6B7280;
  --otc-red:#C8102E;--otc-red-dark:#A00C24;--otc-gold:#C9A24B;--otc-ok:#127a4a;
  --otc-serif:'DM Serif Display',Georgia,'Times New Roman',serif;--otc-sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-family:var(--otc-sans);color:var(--otc-text);box-sizing:border-box}
.otc-courses *,.otc-grid *,.otc-single *,.otc-access *,.otc-modal *,.otc-resend *{box-sizing:border-box}

/* Buttons */
.otc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px/1 var(--otc-sans);padding:14px 20px;border-radius:10px;border:1px solid transparent;cursor:pointer;text-decoration:none!important;transition:background .2s,color .2s,border-color .2s,transform .2s;white-space:nowrap}
.otc-btn--primary{background:var(--otc-red);color:#fff!important}
.otc-btn--primary:hover{background:var(--otc-red-dark)}
.otc-btn--dark{background:var(--otc-ink);color:#fff!important}
.otc-btn--dark:hover{background:var(--otc-red)}
.otc-btn--outline{background:transparent;color:var(--otc-ink)!important;border-color:var(--otc-line)}
.otc-btn--outline:hover{border-color:var(--otc-ink)}
.otc-btn--muted{background:var(--otc-paper);color:var(--otc-muted);cursor:not-allowed}
.otc-btn--block{width:100%}
.otc-btn[disabled]{opacity:.75}
.otc-btn:focus-visible{outline:3px solid rgba(200,16,46,.35);outline-offset:2px}

/* Layout: columns come from --otc-cols-d / -t / -m (set per list) */
.otc-courses{--otc-gap:24px;--otc-cols:var(--otc-cols-d,3);width:100%;position:relative}
@media (max-width:1024px){.otc-courses{--otc-cols:var(--otc-cols-t,2)}}
@media (max-width:767px){.otc-courses{--otc-cols:var(--otc-cols-m,1);--otc-gap:16px}}
.otc-grid{display:grid;grid-template-columns:repeat(var(--otc-cols),minmax(0,1fr));gap:var(--otc-gap)}

/* Slider */
.otc-slider{padding-bottom:4px}
.otc-track{display:flex;gap:var(--otc-gap);overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:6px 2px 24px;margin:-6px -2px 0;outline:none}
.otc-track::-webkit-scrollbar{display:none}
.otc-slide{flex:0 0 calc((100% - (var(--otc-cols) - 1) * var(--otc-gap)) / var(--otc-cols));scroll-snap-align:start;display:flex;min-width:0}
.otc-slide>.otc-card{width:100%}
@media (max-width:767px){.otc-slide{flex-basis:calc((100% - 36px - (var(--otc-cols) - 1) * var(--otc-gap)) / var(--otc-cols))}}
.otc-nav{position:absolute;top:calc(50% - 34px);z-index:3;width:46px;height:46px;border-radius:50%;border:1px solid var(--otc-line);background:#fff;color:var(--otc-ink);display:grid;place-items:center;cursor:pointer;box-shadow:0 12px 28px -14px rgba(11,19,36,.35);transition:background .2s,color .2s,opacity .2s}
.otc-nav:hover{background:var(--otc-ink);color:#fff}
.otc-nav[disabled]{opacity:0;pointer-events:none}
.otc-nav--prev{left:-18px}.otc-nav--next{right:-18px}
.otc-slider.is-static .otc-nav,.otc-slider.is-static .otc-dots{display:none}
.otc-dots{display:flex;justify-content:center;gap:8px;margin-top:4px}
.otc-dots button{width:9px;height:9px;padding:0;border:0;border-radius:999px;background:var(--otc-line);cursor:pointer;transition:width .25s,background .25s}
.otc-dots button[aria-current="true"]{width:26px;background:var(--otc-red)}
@media (max-width:1240px){.otc-nav--prev{left:6px}.otc-nav--next{right:6px}}
@media (max-width:767px){.otc-nav{display:none}}

/* Cards */
.otc-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--otc-line);border-radius:16px;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.otc-card:hover{transform:translateY(-4px);box-shadow:0 24px 48px -20px rgba(11,19,36,.18);border-color:#D6D1C5}
.otc-card__media{position:relative;display:block;aspect-ratio:16/9;background:var(--otc-ink);overflow:hidden}
.otc-card__media img{width:100%;height:100%;object-fit:cover;display:block}
.otc-card__ph{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:22px;color:#fff;
  background:radial-gradient(420px 220px at 90% -10%,rgba(201,162,75,.28),transparent 60%),radial-gradient(380px 260px at -10% 120%,rgba(200,16,46,.35),transparent 60%),var(--otc-ink)}
.otc-card__ph em{font:400 30px/1.05 var(--otc-serif);font-style:italic;color:#fff}
.otc-card__ph small{margin-top:8px;font:600 12px/1 var(--otc-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--otc-gold)}
.otc-badge{position:absolute;top:14px;left:14px;background:var(--otc-red);color:#fff;font:600 12px/1 var(--otc-sans);padding:7px 10px;border-radius:999px}
.otc-badge--inline{position:static;display:inline-block;margin-bottom:12px}
.otc-card__body{padding:22px 22px 0;flex:1}
.otc-card__meta{margin:0 0 8px;font:600 12px/1.3 var(--otc-sans);letter-spacing:.12em;text-transform:uppercase;color:var(--otc-red)}
.otc-card__title{margin:0 0 10px;font:600 20px/1.3 var(--otc-sans);letter-spacing:-.01em}
.otc-card__title a{color:var(--otc-ink)!important;text-decoration:none!important}
.otc-card__title a:hover{color:var(--otc-red)!important}
.otc-card__excerpt{margin:0 0 14px;font-size:15px;line-height:1.6;color:var(--otc-muted)}
.otc-card__facts{margin:14px 0 0;font-size:13.5px;color:var(--otc-muted)}
.otc-card__foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px 22px;margin-top:18px;border-top:1px solid var(--otc-line)}
.otc-actions{display:flex;gap:8px}

/* Ticks */
.otc-ticks{list-style:none;margin:0;padding:0}
.otc-ticks li{position:relative;padding:4px 0 4px 26px;font-size:14.5px;line-height:1.5;color:var(--otc-text)}
.otc-ticks li:before{content:"";position:absolute;left:3px;top:10px;width:11px;height:6px;border-left:2px solid var(--otc-red);border-bottom:2px solid var(--otc-red);transform:rotate(-45deg)}
.otc-ticks--lg li{font-size:16px;padding:7px 0 7px 28px}
.otc-ticks--lg li:before{top:14px}

/* Price */
.otc-price{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px}
.otc-price strong{font:400 28px/1 var(--otc-serif);color:var(--otc-ink)}
.otc-price s{color:var(--otc-muted);font-size:15px}
.otc-off{font:600 12px/1 var(--otc-sans);color:var(--otc-ok);background:#e6f4ec;padding:5px 8px;border-radius:999px}

/* Empty state */
.otc-empty{background:#fff;border:1px dashed var(--otc-line);border-radius:16px;padding:32px;text-align:center}
.otc-empty p{margin:0 0 16px;color:var(--otc-text)}

/* Single course */
.otc-single{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:start;margin:8px 0 40px}
.otc-single__img img{width:100%;height:auto;border-radius:16px;display:block;margin-bottom:24px}
.otc-single__desc{font-size:17px;line-height:1.75}
.otc-box{margin-top:28px;background:var(--otc-paper);border:1px solid var(--otc-line);border-radius:16px;padding:26px}
.otc-box h3{margin:0 0 12px;font:400 26px/1.2 var(--otc-serif);color:var(--otc-ink)}
.otc-buybox{position:sticky;top:110px;background:#fff;border:1px solid var(--otc-line);border-radius:18px;padding:26px;box-shadow:0 24px 48px -28px rgba(11,19,36,.25)}
.otc-buybox .otc-price strong{font-size:38px}
.otc-facts{display:grid;grid-template-columns:auto 1fr;gap:10px 16px;margin:20px 0 22px;padding:18px 0;border-top:1px solid var(--otc-line);border-bottom:1px solid var(--otc-line);font-size:14.5px}
.otc-facts dt{color:var(--otc-muted);margin:0}
.otc-facts dd{margin:0;color:var(--otc-ink);font-weight:600;text-align:right}
.otc-secure{margin:12px 0 0;font-size:13px;color:var(--otc-muted);text-align:center}
.otc-help{margin:16px 0 0;text-align:center;font-size:14px}
.otc-help a{color:var(--otc-ink);font-weight:600}

/* Access page */
.otc-access{margin:8px 0 40px}
.otc-access__content{font-size:17px;line-height:1.75}
.otc-access__content iframe{max-width:100%;border-radius:12px}
.otc-alert{display:flex;flex-direction:column;gap:4px;padding:18px 20px;border-radius:14px;margin:0 0 24px;font-size:15px}
.otc-alert--ok{background:#e6f4ec;color:#0d5a37;border:1px solid #bfe3cf}
.otc-alert--ok strong{font-size:18px}
.otc-alert--bad{background:#fdecee;color:#8a0b20;border:1px solid #f5c2ca}

/* Resend box */
.otc-resend{max-width:640px;margin:32px auto 0;background:var(--otc-paper);border:1px solid var(--otc-line);border-radius:16px;padding:24px}
.otc-resend h4{margin:0 0 6px;font:600 17px/1.3 var(--otc-sans);color:var(--otc-ink)}
.otc-resend p{margin:0 0 14px;font-size:14.5px;color:var(--otc-muted)}
.otc-resend__row{display:flex;gap:10px;flex-wrap:wrap}
.otc-resend__row input{flex:1 1 220px;min-width:0}
.otc-resend__msg{margin:12px 0 0!important;color:var(--otc-ink)!important}

/* Inputs */
.otc-form input,.otc-resend input{width:100%;font:400 16px/1.3 var(--otc-sans);padding:13px 14px;border:1px solid var(--otc-line);border-radius:10px;background:#fff;color:var(--otc-ink)}
.otc-form input:focus,.otc-resend input:focus{outline:none;border-color:var(--otc-ink);box-shadow:0 0 0 3px rgba(11,19,36,.08)}

/* Modal */
.otc-modal{position:fixed;inset:0;z-index:100000;display:flex;align-items:center;justify-content:center;padding:16px}
.otc-modal[hidden]{display:none}
.otc-modal__overlay{position:absolute;inset:0;background:rgba(11,19,36,.6);backdrop-filter:blur(3px)}
.otc-modal__box{position:relative;width:100%;max-width:440px;max-height:calc(100vh - 32px);overflow:auto;background:#fff;border-radius:18px;padding:28px;box-shadow:0 40px 80px -20px rgba(0,0,0,.45);animation:otcIn .25s ease}
@keyframes otcIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.otc-modal__x{position:absolute;top:12px;right:12px;width:36px;height:36px;border:0;border-radius:50%;background:var(--otc-paper);color:var(--otc-ink);font-size:22px;line-height:1;cursor:pointer}
.otc-modal__eyebrow{margin:0 0 6px;font:600 12px/1 var(--otc-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--otc-red)}
.otc-modal__title{margin:0 40px 6px 0;font:400 26px/1.15 var(--otc-serif);color:var(--otc-ink)}
.otc-modal__price{margin:0 0 18px;font:600 18px/1 var(--otc-sans);color:var(--otc-ink)}
.otc-form{display:grid;gap:14px}
.otc-form label{display:grid;gap:6px;font:600 14px/1.3 var(--otc-sans);color:var(--otc-ink)}
.otc-form label small{font-weight:400;color:var(--otc-muted)}
.otc-form__err{margin:0;min-height:0;color:var(--otc-red);font-size:14px}
.otc-form__err:empty{display:none}
.otc-hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.otc-modal__wait{text-align:center;padding:24px 0}
.otc-modal__wait[hidden]{display:none}
.otc-spinner{display:inline-block;width:34px;height:34px;border:3px solid var(--otc-line);border-top-color:var(--otc-red);border-radius:50%;animation:otcSpin .8s linear infinite}
@keyframes otcSpin{to{transform:rotate(360deg)}}
body.otc-lock{overflow:hidden}

/* Archive page */
.otc-archive{max-width:1200px;margin:0 auto;padding:64px 24px 80px}
.otc-archive__head{max-width:720px;margin-bottom:40px}
.otc-eyebrow{margin:0 0 14px;font:600 12.5px/1 var(--otc-sans);letter-spacing:.16em;text-transform:uppercase;color:var(--otc-red)}
.otc-archive__title{margin:0 0 14px;font:400 clamp(34px,4.2vw,52px)/1.08 var(--otc-serif);color:var(--otc-ink)}
.otc-archive__title em{font-style:italic;color:var(--otc-gold)}
.otc-archive__lead{margin:0;font-size:18px;line-height:1.7}

@media (max-width:900px){
  .otc-single{grid-template-columns:1fr;gap:24px}
  .otc-buybox{position:static;order:-1}
}
@media (max-width:480px){
  .otc-card__foot{flex-direction:column;align-items:stretch}
  .otc-actions .otc-btn{flex:1}
  .otc-modal{align-items:flex-end;padding:0}
  .otc-modal__box{max-width:none;border-radius:18px 18px 0 0;max-height:92vh}
}
@media (prefers-reduced-motion:reduce){.otc-card,.otc-modal__box{transition:none;animation:none}}

/* Card: files line */
.otc-card__files{margin:8px 0 0;font-size:13.5px;font-weight:600;color:var(--otc-ink)}
.otc-card__files:before{content:"📄 "}

/* Detail sections */
.otc-sections{display:grid;gap:16px;margin-top:28px}
.otc-sections .otc-box{margin-top:0}
.otc-sec{background:#fff}

/* Downloads */
.otc-downloads{margin-top:28px}
.otc-downloads__note{margin:-6px 0 14px;color:var(--otc-muted);font-size:14.5px}
.otc-files{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.otc-file{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--otc-line);border-radius:12px;padding:12px 14px}
.otc-file__icon{flex:none;width:44px;height:44px;border-radius:10px;display:grid;place-items:center;background:#fdecee;color:var(--otc-red);font:700 11px/1 var(--otc-sans);letter-spacing:.04em}
.otc-file__text{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.otc-file__text strong{color:var(--otc-ink);font-size:15px;overflow-wrap:anywhere}
.otc-file__text small{color:var(--otc-muted);font-size:12.5px}
.otc-file__lock{flex:none;color:var(--otc-muted)}
.otc-btn--sm{padding:10px 14px;font-size:14px}
.otc-access .otc-downloads{margin:0 0 28px}
.screen-reader-text{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}

/* Narrow cards (e.g. 2 per row on mobile, 5–6 per row on desktop) */
.otc-card{container-type:inline-size}
@container (max-width:330px){
  .otc-card__foot{flex-direction:column;align-items:stretch}
  .otc-actions{flex-direction:column}
  .otc-actions .otc-btn{width:100%}
}
@container (max-width:230px){
  .otc-card__body{padding:16px 14px 0}
  .otc-card__foot{padding:14px}
  .otc-card__title{font-size:16px}
  .otc-card__excerpt,.otc-ticks,.otc-card__facts{display:none}
  .otc-price strong{font-size:22px}
  .otc-card__ph{padding:14px}.otc-card__ph em{font-size:22px}
  .otc-btn{padding:12px 10px;font-size:14px}
}
.otc-file__actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.otc-card__files--book:before{content:"📘 "}
@media (max-width:560px){
  .otc-file{flex-wrap:wrap}
  .otc-file__actions{width:100%;justify-content:stretch}
  .otc-file__actions .otc-btn{flex:1}
}