/* DC-Lab Redesign — Block 2 COURSES (architectural draft assembly, blueprint line-draw) */

.courses{position:relative;padding:clamp(80px,10vw,140px) 0 clamp(70px,8vw,120px);
  background:var(--paper);overflow:hidden}
/* faint CAD millimetre grid (continuity with hero blueprint) */
.courses__grid-bg{position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(14,23,38,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,23,38,.045) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(120% 80% at 50% 18%,#000 30%,transparent 78%);
          mask-image:radial-gradient(120% 80% at 50% 18%,#000 30%,transparent 78%)}

/* ---------- header ---------- */
.courses__head{position:relative;max-width:760px;margin-bottom:clamp(40px,5vw,64px)}
.courses__head .eyebrow{display:inline-block;margin-bottom:18px}
.courses h2{font-size:clamp(2.1rem,5.4vw,4rem);color:var(--ink);line-height:1.0}
.courses h2 .hl{position:relative;color:var(--teal-deep);white-space:nowrap}
.courses h2 .hl::after{content:"";position:absolute;left:0;right:0;bottom:.06em;height:.16em;
  background:linear-gradient(90deg,var(--teal),var(--magenta));border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .9s .25s cubic-bezier(.22,1,.36,1)}
.courses h2.is-in .hl::after{transform:scaleX(1)}
.courses__lead{margin:18px 0 0;color:var(--ink-soft);font-size:clamp(1rem,1.5vw,1.18rem);max-width:600px}

/* ---------- tabs (ink-underline slider) ---------- */
.courses__tabs{position:relative;display:inline-flex;gap:6px;margin-top:30px;
  padding:5px;border-radius:999px;background:#fff;box-shadow:var(--shadow)}
.ctab{position:relative;z-index:2;border:0;background:transparent;cursor:pointer;
  font-family:var(--ff-text);font-weight:700;font-size:.92rem;letter-spacing:.01em;
  color:var(--ink-soft);padding:.7em 1.4em;border-radius:999px;transition:color .35s}
.ctab.is-active{color:#fff}
.ctab__ink{position:absolute;z-index:1;top:5px;bottom:5px;border-radius:999px;
  background:linear-gradient(120deg,var(--teal),var(--teal-deep));
  box-shadow:0 8px 22px -8px rgba(10,142,132,.7);
  transition:left .45s cubic-bezier(.5,1.4,.4,1),width .45s cubic-bezier(.5,1.4,.4,1)}

/* ---------- grid ---------- */
.courses__grid{display:grid;gap:clamp(16px,2vw,24px);
  grid-template-columns:repeat(3,1fr)}
.courses__grid[hidden]{display:none}

/* ---------- card ---------- */
.ccard{--c:var(--teal);position:relative;display:flex;flex-direction:column;
  min-height:268px;padding:26px 26px 24px;border-radius:var(--r);
  background:linear-gradient(180deg,#fff, #fbfcfe);
  border:1px solid var(--line);box-shadow:0 10px 30px -18px rgba(14,23,38,.25);
  overflow:hidden;transform-style:preserve-3d;
  transition:transform .5s cubic-bezier(.22,1,.36,1),box-shadow .5s,border-color .5s}
.ccard--magenta{--c:var(--magenta)} .ccard--blue{--c:var(--blue)}
.ccard--gold{--c:var(--gold)} .ccard--green{--c:var(--green)} .ccard--teal{--c:var(--teal)}

/* blueprint border line-draw (SVG rect, dash offset) */
.ccard__draw{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:3;
  border-radius:var(--r)}
.ccard__draw rect{fill:none;stroke:var(--c);stroke-width:.7;vector-effect:non-scaling-stroke;
  stroke-dasharray:400;stroke-dashoffset:400;opacity:.0;
  transition:stroke-dashoffset 1.1s cubic-bezier(.6,0,.2,1),opacity .4s}
.ccard.is-in .ccard__draw rect{stroke-dashoffset:0;opacity:.55}

/* accent corner glow + left tab */
.ccard::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:3px;
  background:var(--c);box-shadow:0 0 16px -2px var(--c);opacity:.0;transform:scaleY(.2);
  transform-origin:top;transition:opacity .5s .2s,transform .6s .2s cubic-bezier(.22,1,.36,1)}
.ccard.is-in::before{opacity:.9;transform:scaleY(1)}
.ccard::after{content:"";position:absolute;right:-40%;top:-60%;width:75%;height:120%;
  background:radial-gradient(circle,var(--c),transparent 62%);opacity:0;filter:blur(20px);
  transition:opacity .5s;pointer-events:none}

.ccard__badge{align-self:flex-start;font-family:var(--ff-text);font-weight:700;font-size:.66rem;
  letter-spacing:.12em;text-transform:uppercase;color:#fff;background:var(--c);
  padding:.42em .8em;border-radius:999px;margin-bottom:14px;position:relative;z-index:2}
.ccard__badge--new{background:var(--blue)} .ccard__badge--sale{background:var(--magenta)}
.ccard__badge--adsk{background:var(--gold);color:#1a1300}

.ccard__top{display:flex;gap:14px;align-items:flex-start;position:relative;z-index:2}
.ccard__idx{font-family:var(--ff-display);font-weight:800;font-size:1.05rem;
  color:var(--c);opacity:.85;letter-spacing:0;line-height:1.4;min-width:1.8em}
.ccard__title{font-family:var(--ff-display);font-weight:700;font-size:clamp(1.18rem,1.7vw,1.42rem);
  color:var(--ink);line-height:1.06;letter-spacing:-.01em}
/* if no badge, lift title to top */
.ccard__top:first-child{margin-top:2px}

.ccard__meta{display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:18px;position:relative;z-index:2}
.ccard__dur{display:inline-flex;align-items:center;gap:.5em;font-weight:700;font-size:.84rem;
  color:var(--ink-soft)}
.ccard__dur i{width:7px;height:7px;border-radius:50%;background:var(--c);box-shadow:0 0 8px var(--c)}
.ccard__price{font-family:var(--ff-display);font-weight:700;font-size:1.12rem;color:var(--ink)}
.ccard__price b{font-family:var(--ff-text);font-weight:600;font-size:.72rem;color:var(--ink-soft)}

/* hidden selling line — slides up on hover from behind the meta row */
.ccard__sell{position:relative;z-index:2;margin:14px 0 0;font-size:.9rem;line-height:1.45;
  color:var(--ink-soft);max-height:0;opacity:0;transform:translateY(8px);
  transition:max-height .5s cubic-bezier(.22,1,.36,1),opacity .4s,transform .5s,margin .4s}
.ccard__cta{position:relative;z-index:2;display:inline-flex;align-items:center;gap:.5em;
  margin-top:16px;font-weight:700;font-size:.9rem;color:var(--c);
  max-height:0;opacity:0;overflow:hidden;transition:max-height .5s,opacity .4s,gap .35s}
.ccard__cta span{transition:transform .35s}

/* hover — lift, glow, reveal selling + cta */
.ccard:hover{transform:translateY(-8px);border-color:transparent;
  box-shadow:0 30px 60px -26px color-mix(in srgb,var(--c) 60%,rgba(14,23,38,.4))}
.ccard:hover::after{opacity:.13}
.ccard:hover .ccard__draw rect{opacity:.9;stroke-width:1.1}
.ccard:hover .ccard__sell{max-height:90px;opacity:1;transform:none}
.ccard:hover .ccard__cta{max-height:40px;opacity:1}
.ccard:hover .ccard__cta span{transform:translateX(5px)}

/* ---------- CTA card (last in professions) ---------- */
.ccard--cta{background:linear-gradient(135deg,var(--ink),#16223a);border:0;min-height:268px;
  display:flex;align-items:center;justify-content:center;text-align:center}
.ccard--cta .ccard__draw rect{stroke:var(--teal)}
.ccard__cta-inner{position:relative;z-index:2;padding:8px}
.ccard__cta-k{display:block;font-weight:700;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal)}
.ccard__cta-t{display:block;margin:10px 0 18px;font-family:var(--ff-display);font-weight:700;
  font-size:1.3rem;color:#fff;line-height:1.12}
.ccard__cta-go{display:inline-block;font-weight:700;font-size:.92rem;color:#fff;
  padding:.7em 1.3em;border-radius:999px;background:var(--teal);transition:transform .35s,background .3s}
.ccard--cta:hover{transform:translateY(-8px)}
.ccard--cta:hover .ccard__cta-go{background:var(--teal-deep);transform:scale(1.04)}

/* ---------- responsive ---------- */
@media (max-width:980px){.courses__grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){
  .courses__grid{grid-template-columns:1fr}
  .ccard{min-height:auto}
  /* on touch, always show selling line (no hover) */
  .ccard__sell{max-height:90px;opacity:1;transform:none;margin-top:12px}
  .ccard__cta{max-height:40px;opacity:1}
}