/* ============================================================
   DegreeFlow — /explore
   Extends styles.css (tokens, nav, buttons, glass, orbs, grain).

   1. Spacing scale + page shell
   2. Scenario tabs
   3. Configuration panel + dropdowns + logo slots
   4. Map layout & side rail
   5. Timeline (years → semesters)
   6. Course cards
   7. Connections
   8. Detail panel / what-changed / progress
   9. Comparison views (major, minor, university)
  10. Tutorial
  11. Interactions (drag, toast)
  12. Responsive
   ============================================================ */

/* ---------- 1. Spacing scale + page shell ---------- */
.explore-page{
  --sp-xs:8px;
  --sp-sm:14px;
  --sp-md:22px;
  --sp-lg:30px;
  --sp-xl:44px;
  --rail:330px;
}
.explore-head{padding:128px 0 0}
.ex-title{font-size:clamp(34px,4.6vw,56px);font-weight:800;letter-spacing:-.035em;line-height:1.08;padding-bottom:.06em}
.grad-word{
  background:linear-gradient(98deg,#4DA3FF 4%,#7E8DFF 46%,#B8A8FF 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.ex-sub{margin-top:var(--sp-sm);color:var(--muted);font-size:17px;max-width:52ch}
.ex-state{
  margin-top:var(--sp-sm);display:inline-flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:#98A2B8;
}
.ex-state b{color:var(--text);font-weight:600}
.ex-state .sep{width:3px;height:3px;border-radius:50%;background:#3A4462}
.ex-state .mod{
  padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;color:#C6BCFF;
  background:rgba(155,140,255,.12);border:1px solid rgba(155,140,255,.3);
}

.btn.is-active{box-shadow:0 12px 34px -12px rgba(123,124,255,1),inset 0 1px 0 rgba(255,255,255,.3),0 0 0 1px rgba(155,140,255,.45)}
.work{padding:var(--sp-md) 0 110px}

/* ---------- 2. Scenario tabs ---------- */
.tabs-section{padding:var(--sp-lg) 0 0}
.tabs-scroll{overflow-x:auto;overflow-y:hidden;scrollbar-width:none;padding:4px 0 2px}
.tabs-scroll::-webkit-scrollbar{display:none}
.tabs{
  position:relative;display:inline-flex;gap:2px;padding:6px;border-radius:999px;
  background:rgba(14,19,32,.66);backdrop-filter:blur(20px) saturate(150%);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  box-shadow:0 22px 50px -32px rgba(0,0,0,1);border:1px solid transparent;
}
.tabs::after{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(110deg,rgba(91,124,255,.6),rgba(155,140,255,.24) 48%,rgba(37,45,64,.7));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.tab-pill{
  position:absolute;top:6px;bottom:6px;left:0;width:0;border-radius:999px;
  background:linear-gradient(115deg,#5B7CFF,#7D7FFF 46%,#9B8CFF);
  box-shadow:0 10px 30px -10px rgba(123,124,255,.95),inset 0 1px 0 rgba(255,255,255,.28);
  transform:translateX(0);
  transition:transform .66s cubic-bezier(.32,1.22,.42,1),width .66s cubic-bezier(.32,1.22,.42,1);
  will-change:transform,width;
}
.tab{
  position:relative;z-index:1;border:0;background:none;cursor:pointer;
  padding:12px 24px;border-radius:999px;white-space:nowrap;
  font-family:inherit;font-size:15px;font-weight:600;letter-spacing:-.01em;
  color:var(--muted);transition:color .35s ease;
}
.tab:hover{color:#C3CBDE}
.tab[aria-selected="true"]{color:#fff}

/* ---------- 3. Configuration panel ---------- */
.config-bar{display:none}
.config-bar.is-on{display:flex;justify-content:flex-end;margin-top:var(--sp-lg)}
.config-bar.is-on + .config{margin-top:10px}

.config{
  position:relative;z-index:50;margin-top:var(--sp-lg);padding:18px;border-radius:var(--radius-l);
  background:linear-gradient(165deg,rgba(23,29,45,.74),rgba(13,18,30,.8));
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid transparent;
  display:flex;flex-wrap:wrap;gap:var(--sp-sm);align-items:flex-end;justify-content:space-between;
}
.config::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(150deg,rgba(91,124,255,.5),rgba(155,140,255,.22) 45%,rgba(37,45,64,.6));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.config-fields{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:var(--sp-sm);flex:1 1 460px;min-width:0;
  transition:opacity .3s ease,transform .3s var(--ease);
}
.config-fields.is-swapping{opacity:0;transform:translateY(8px)}
.config-actions{display:flex;gap:10px;align-items:center;flex:0 0 auto}

.field{display:grid;gap:6px;min-width:0}
.field-label{font-size:12px;color:var(--muted);font-weight:600;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.select{position:relative}
.select-btn{
  width:100%;min-width:0;overflow:hidden;display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:12px;cursor:pointer;min-height:46px;
  background:rgba(9,13,23,.72);border:1px solid var(--border);
  color:var(--text);font-family:inherit;font-size:14.5px;font-weight:600;text-align:left;
  transition:border-color .3s ease,background .3s ease;
}
.select-btn:hover{border-color:#36415c;background:rgba(13,18,31,.9)}
.select.is-open .select-btn{border-color:rgba(123,124,255,.7);box-shadow:0 0 0 3px rgba(91,124,255,.12)}
.select-value{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.select-chevron{width:9px;height:9px;border-right:1.6px solid var(--muted);border-bottom:1.6px solid var(--muted);
  transform:rotate(45deg) translate(-2px,-2px);transition:transform .35s var(--ease);flex:0 0 auto}
.select.is-open .select-chevron{transform:rotate(225deg) translate(-3px,-3px)}
.select-menu{
  position:absolute;top:calc(100% + 7px);left:0;right:0;z-index:60;
  padding:6px;border-radius:13px;list-style:none;margin:0;max-height:300px;overflow:auto;
  background:var(--glass-strong);border:1px solid rgba(60,74,110,.9);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 30px 60px -30px rgba(0,0,0,1);
  opacity:0;visibility:hidden;transform:translateY(-6px) scale(.98);transform-origin:top;
  transition:opacity .24s ease,transform .3s var(--ease),visibility .24s;
}
.select.is-open .select-menu{opacity:1;visibility:visible;transform:none}
.select-option{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;
  font-size:14px;color:#C3CBDE;cursor:pointer;transition:background .2s ease,color .2s ease}
.select-option span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.select-option:hover{background:rgba(91,124,255,.16);color:var(--text)}
.select-option[aria-selected="true"]{color:var(--text);background:rgba(91,124,255,.1)}

/* university logo slots — intentionally empty, see explore.html header comment */
.uni-logo{
  flex:0 0 auto;display:grid;place-items:center;overflow:hidden;
  width:34px;height:34px;border-radius:9px;
  background:rgba(255,255,255,.03);border:1px solid rgba(47,57,80,.9);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.uni-logo img{max-width:76%;max-height:76%;object-fit:contain;display:block}
.uni-logo.lg{width:56px;height:56px;border-radius:14px}
.uni-logo.xl{width:68px;height:68px;border-radius:16px}

/* ---------- 4. Map layout & rail ---------- */
.view{position:relative;z-index:1;margin-top:var(--sp-lg)}
.view.is-leaving{opacity:0;transform:translateY(10px);transition:opacity .24s ease,transform .24s ease}
.view.is-entering{animation:view-in .55s var(--ease) both}
@keyframes view-in{from{opacity:0;transform:translateY(14px)}}

.map-layout{display:grid;grid-template-columns:minmax(0,1fr) var(--rail);gap:var(--sp-md);align-items:start}
.rail{position:sticky;top:96px;display:grid;gap:12px}

.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:var(--sp-sm)}
.section-title h2{font-size:clamp(20px,2.3vw,26px);letter-spacing:-.025em}
.section-title p{color:var(--muted);font-size:14px;margin-top:6px;max-width:62ch}
.tip-btn{
  border:1px solid var(--border);background:rgba(255,255,255,.03);color:var(--muted);
  font-family:inherit;font-size:12.5px;font-weight:600;padding:7px 12px;border-radius:999px;cursor:pointer;
  transition:color .25s ease,border-color .25s ease;flex:0 0 auto;
}
.tip-btn:hover{color:var(--text);border-color:#36415c}

/* ---------- 5. Timeline ---------- */
.timeline{position:relative;display:grid;gap:var(--sp-md)}
.year-row{display:grid;grid-template-columns:96px minmax(0,1fr);gap:var(--sp-sm);position:relative}
.year-rail{display:grid;grid-template-rows:auto 1fr auto;gap:8px;justify-items:start;padding-top:2px}
.year-num{font-size:14px;font-weight:700;letter-spacing:-.02em}
.year-line{width:1px;justify-self:start;margin-left:5px;min-height:40px;height:100%;
  background:linear-gradient(180deg,rgba(91,124,255,.55),rgba(155,140,255,.25),transparent)}
.year-cr{font-size:11.5px;color:#6C768E}
.year-row.is-now .year-num{color:#C6BCFF}
.year-row.is-now .year-line{background:linear-gradient(180deg,rgba(155,140,255,.9),rgba(77,163,255,.4),transparent)}

.sem-cols{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-sm)}
.sem-col{display:grid;gap:8px;align-content:start}
.sem-head{display:flex;align-items:baseline;gap:8px;padding-left:2px}
.sem-name{font-size:12.5px;font-weight:700;color:#AAB4CC}
.sem-term{font-size:11.5px;color:#6C768E}
.sem-cards{display:grid;gap:8px;min-height:74px;border-radius:14px;padding:3px;
  transition:background .3s ease,box-shadow .3s ease}
.sem-cards.is-drop{background:rgba(91,124,255,.07);box-shadow:inset 0 0 0 1px rgba(91,124,255,.45)}
.sem-cards.is-drop-bad{background:rgba(255,107,155,.05);box-shadow:inset 0 0 0 1px rgba(255,107,155,.3)}

.branch-head{grid-column:1 / -1;display:flex;align-items:center;gap:9px;margin-top:4px;
  font-size:12px;font-weight:700;color:#B0A6FF}
.branch-head::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,rgba(155,140,255,.35),transparent)}

/* ---------- 6. Course cards ---------- */
.course{
  position:relative;padding:12px 13px 13px;border-radius:13px;cursor:pointer;z-index:1;
  min-height:126px;display:flex;flex-direction:column;
  background:linear-gradient(165deg,rgba(23,29,45,.82),rgba(13,18,30,.88));
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid transparent;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),opacity .35s ease,filter .35s ease;
}
.course:not(.no-drag){cursor:grab}
.course.anim-in{opacity:0;transform:translateY(10px);
  animation:course-in .55s var(--ease) forwards;animation-delay:calc(var(--d,0) * 32ms)}
@keyframes course-in{to{opacity:1;transform:none}}
.course::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(150deg,rgba(91,124,255,.34),rgba(155,140,255,.14) 50%,rgba(37,45,64,.7));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;transition:background .4s ease;pointer-events:none;
}
.course:hover{transform:translateY(-2px);box-shadow:0 18px 36px -24px rgba(0,0,0,1)}
.course:hover::before{background:linear-gradient(150deg,rgba(123,150,255,.9),rgba(178,160,255,.5) 50%,rgba(77,163,255,.28))}

.c-status{display:flex;align-items:center;gap:8px;font-size:10px;font-weight:700;letter-spacing:.07em;color:var(--muted)}
.c-icon{
  flex:0 0 auto;width:17px;height:17px;border-radius:5px;display:grid;place-items:center;
  font-size:9.5px;line-height:1;background:rgba(255,255,255,.05);
}
.c-code{font-size:14.5px;font-weight:700;letter-spacing:-.01em;margin-top:11px}
.c-name{font-size:12.5px;color:#AAB4CC;margin-top:3px;line-height:1.35;
  min-height:2.7em;display:-webkit-box;display:-webkit-box;line-clamp:2;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.c-cr{font-size:11.5px;color:#6C768E;margin-top:auto;padding-top:9px}

.c-check{
  position:absolute;top:11px;right:11px;width:25px;height:25px;border-radius:50%;cursor:pointer;padding:0;
  display:grid;place-items:center;font-size:11px;line-height:1;font-family:inherit;
  background:rgba(9,13,23,.72);border:1.5px solid #33405C;color:transparent;
  transition:transform .3s var(--ease),border-color .3s ease,color .3s ease,background .3s ease;
}
.c-check:hover{transform:scale(1.12);border-color:var(--electric);color:rgba(245,247,255,.55)}
.c-check:disabled{cursor:not-allowed;opacity:.45}
.c-check:disabled:hover{transform:none;border-color:#33405C;color:transparent}

/* completed */
.course.st-done{background:linear-gradient(165deg,rgba(19,27,46,.84),rgba(11,16,28,.88))}
.course.st-done::before{background:linear-gradient(150deg,rgba(77,163,255,.6),rgba(91,124,255,.24) 55%,rgba(37,45,64,.6))}
.course.st-done .c-status{color:#7FC0FF}
.course.st-done .c-icon{background:rgba(77,163,255,.18);color:#8FC8FF}
.course.st-done .c-code{color:#DCE6FA}
.course.st-done .c-name{color:#8B96AE}
.course.st-done .c-check{border-color:rgba(77,163,255,.8);background:rgba(77,163,255,.2);color:#DCEBFF}

/* in progress */
.course.st-active::before{background:linear-gradient(150deg,rgba(155,140,255,.95),rgba(255,143,192,.42) 60%,rgba(37,45,64,.6))}
.course.st-active{box-shadow:0 0 34px -18px rgba(155,140,255,.9)}
.course.st-active .c-status{color:#C6BCFF}
.course.st-active .c-icon{background:rgba(155,140,255,.2);color:#C6BCFF;animation:dot-pulse 2.8s ease-in-out infinite}
@keyframes dot-pulse{50%{box-shadow:0 0 0 5px rgba(155,140,255,.14)}}

/* available */
.course.st-open .c-status{color:#8FE3BC}
.course.st-open .c-icon{background:rgba(94,230,168,.16);color:#8FE3BC}

/* locked */
.course.st-locked{background:linear-gradient(165deg,rgba(16,21,34,.66),rgba(10,14,24,.76));cursor:pointer}
.course.st-locked::before{background:linear-gradient(150deg,rgba(46,56,80,.6),rgba(37,45,64,.45))}
.course.st-locked .c-status{color:#8A93A9}
.course.st-locked .c-icon{background:rgba(255,178,120,.12);color:#E8B489;animation:lock-glow 3.6s ease-in-out infinite}
@keyframes lock-glow{50%{box-shadow:0 0 0 4px rgba(255,178,120,.09)}}
.course.st-locked .c-code{color:#818AA0}
.course.st-locked .c-name{color:#626B82}

/* electives and minor branch */
.course.kind-elective::before{background:repeating-linear-gradient(118deg,rgba(94,230,168,.3) 0 9px,rgba(37,45,64,.5) 9px 18px)}
.course.kind-minor::before{background:linear-gradient(150deg,rgba(155,140,255,.75),rgba(255,143,192,.32) 55%,rgba(37,45,64,.6))}
.course.kind-minor .c-status{color:#C6BCFF}
.course.kind-minor .c-icon{background:rgba(155,140,255,.18);color:#C6BCFF}

/* minor branch grouping — makes ownership unmistakable */
.minor-group{
  position:relative;display:grid;gap:8px;margin-top:12px;padding:10px 10px 11px;
  border-radius:15px;border:1px dashed rgba(155,140,255,.4);background:rgba(155,140,255,.05);
}
.minor-group-label{
  display:flex;align-items:center;gap:8px;font-size:10px;font-weight:700;
  letter-spacing:.07em;color:#B8ACFF;
}
.minor-group-label::before{content:"";width:6px;height:6px;border-radius:50%;
  background:#9B8CFF;box-shadow:0 0 9px rgba(155,140,255,.9)}

.course.is-dim{opacity:.24;filter:saturate(.45)}
.course.is-lit::before{background:linear-gradient(150deg,rgba(123,150,255,.95),rgba(178,160,255,.6) 50%,rgba(77,163,255,.35))}
.course.is-lit{box-shadow:0 20px 40px -24px rgba(91,124,255,.9)}
.course.is-selected{box-shadow:0 0 0 1px rgba(155,140,255,.7),0 22px 44px -22px rgba(123,124,255,.95)}
.course.is-selected::before{background:linear-gradient(150deg,rgba(155,140,255,1),rgba(255,143,192,.5) 60%,rgba(77,163,255,.4))}

.course.diff-new{animation:new-in .7s var(--ease) both}
@keyframes new-in{from{opacity:0;transform:translateY(8px) scale(.96)}
  60%{box-shadow:0 0 0 6px rgba(94,230,168,.14)}}
.course.is-removing{opacity:0;transform:translateY(-6px) scale(.95);
  transition:opacity .34s ease,transform .34s var(--ease)}
.course.flash-done{animation:flash-done .9s var(--ease)}
@keyframes flash-done{0%{box-shadow:0 0 0 0 rgba(77,163,255,.5)}
  40%{box-shadow:0 0 0 10px rgba(77,163,255,0);transform:translateY(-3px) scale(1.02)}
  100%{box-shadow:0 0 0 0 rgba(77,163,255,0)}}

/* ---------- 7. Connections ---------- */
.edges-svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:visible}
.ln{fill:none;stroke:#222B42;stroke-width:1.4;transition:stroke .35s ease,opacity .35s ease,stroke-width .35s ease}
.ln.s-done{stroke:rgba(77,163,255,.34)}
.ln.s-active{stroke:rgba(155,140,255,.45)}
.ln.s-minor{stroke:rgba(155,140,255,.5);stroke-dasharray:5 6}
.ln.is-lit{stroke:url(#exGrad);stroke-width:2.2;opacity:1}
.ln.is-dim{opacity:.12}
.ln.draw{stroke-dasharray:var(--len);stroke-dashoffset:var(--len);
  animation:ln-draw .85s var(--ease) forwards;animation-delay:calc(var(--d,0) * 26ms)}
@keyframes ln-draw{to{stroke-dashoffset:0}}

/* ---------- 8. Rail panels ---------- */
.panel-card{
  position:relative;padding:16px;border-radius:var(--radius-l);
  background:linear-gradient(160deg,rgba(23,29,45,.9),rgba(14,19,32,.9));
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid transparent;
}
.panel-card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(140deg,rgba(91,124,255,.6),rgba(155,140,255,.26) 46%,rgba(37,45,64,.6));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.panel-label{font-size:11px;font-weight:700;letter-spacing:.07em;color:var(--muted)}

.pp-figure{display:flex;align-items:baseline;gap:7px;margin-top:8px}
.pp-figure strong{font-size:28px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.pp-figure span{font-size:13px;color:var(--muted)}
.pp-bar{height:6px;border-radius:99px;background:#1B2233;margin-top:10px;overflow:hidden;display:flex}
.pp-bar i{display:block;height:100%;border-radius:99px;
  background:linear-gradient(90deg,#4DA3FF,#9B8CFF);box-shadow:0 0 18px rgba(91,124,255,.5);
  transition:width .9s var(--ease)}
.pp-foot{display:flex;align-items:center;gap:8px;margin-top:11px;font-size:12.5px;color:var(--muted)}
.pp-dot{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 10px rgba(94,230,168,.8)}

/* course detail */
.detail{min-height:150px}
.detail-empty{color:#6C768E;font-size:13px;margin-top:10px;line-height:1.5}
.detail-code{font-size:17px;font-weight:700;letter-spacing:-.02em;margin-top:9px}
.detail-name{font-size:13.5px;color:#AAB4CC;margin-top:2px}
.detail-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}
.meta-chip{font-size:11px;font-weight:600;padding:4px 9px;border-radius:999px;
  background:rgba(255,255,255,.04);border:1px solid var(--border);color:#AAB4CC}
.meta-chip.st-done{color:#7FC0FF;border-color:rgba(77,163,255,.3);background:rgba(77,163,255,.1)}
.meta-chip.st-active{color:#C6BCFF;border-color:rgba(155,140,255,.32);background:rgba(155,140,255,.1)}
.meta-chip.st-open{color:#8FE3BC;border-color:rgba(94,230,168,.3);background:rgba(94,230,168,.08)}
.detail-block{margin-top:14px;padding-top:13px;border-top:1px solid rgba(37,45,64,.9)}
.detail-block h4{font-size:11px;font-weight:700;letter-spacing:.07em;color:var(--muted);margin:0 0 8px}
.detail-list{display:grid;gap:5px;list-style:none;margin:0;padding:0}
.detail-list li{font-size:12.5px;color:#C3CBDE;display:flex;gap:8px;align-items:flex-start;cursor:pointer;
  padding:4px 6px;border-radius:8px;transition:background .2s ease}
.detail-list li:hover{background:rgba(91,124,255,.12)}
.detail-list li i{font-style:normal;color:#5F7FA8;flex:0 0 auto}
.detail-list li.met i{color:#4DA3FF}
.unlock-count{
  display:inline-flex;align-items:center;gap:8px;margin-top:12px;padding:7px 12px;border-radius:999px;
  font-size:12.5px;font-weight:700;color:#CBD6FF;
  background:linear-gradient(100deg,rgba(91,124,255,.2),rgba(155,140,255,.14));
  border:1px solid rgba(123,124,255,.4);
}
.detail-check{margin-top:13px;width:100%;justify-content:center}

/* what changed */
.changed{animation:view-in .55s var(--ease) both}
.changed::before{background:linear-gradient(140deg,rgba(94,230,168,.6),rgba(155,140,255,.3) 50%,rgba(37,45,64,.6))}
.changed-rows{display:grid;gap:7px;margin-top:11px}
.changed-row{display:flex;align-items:center;gap:9px;font-size:13px;color:#C3CBDE}
.changed-row b{font-variant-numeric:tabular-nums;font-weight:700;min-width:22px}
.changed-row.add b{color:#8FE3BC}
.changed-row.rem b{color:#FF9EC8}
.changed-row.same b{color:#7FC0FF}
.changed-foot{margin-top:13px;padding-top:12px;border-top:1px solid rgba(37,45,64,.9);
  display:grid;gap:6px;font-size:12.5px;color:var(--muted)}
.changed-foot strong{color:var(--text)}
.changed-close{margin-top:12px;width:100%;justify-content:center}

/* ---------- 9. Comparison views ---------- */
.futures{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-sm);align-items:start}
.future{
  position:relative;padding:18px;border-radius:var(--radius-l);
  background:linear-gradient(165deg,rgba(23,29,45,.7),rgba(13,18,30,.8));
  backdrop-filter:blur(16px);border:1px solid transparent;
}
.future::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(150deg,rgba(91,124,255,.45),rgba(37,45,64,.6));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.future.is-new::before{background:linear-gradient(150deg,rgba(155,140,255,.9),rgba(255,143,192,.4) 55%,rgba(37,45,64,.6))}
.future-head{display:flex;align-items:center;gap:12px}
.future-role{font-size:11px;font-weight:700;letter-spacing:.07em;color:var(--muted)}
.future-name{font-size:19px;font-weight:700;letter-spacing:-.025em;margin-top:3px}
.future-sub{font-size:12.5px;color:#6C768E;margin-top:2px}
.mini-list{display:grid;gap:5px;margin-top:15px;max-height:330px;overflow:auto;padding-right:4px}
.mini-year{font-size:11px;font-weight:700;letter-spacing:.06em;color:#6C768E;margin-top:9px}
.mini-row{display:flex;align-items:center;gap:9px;padding:7px 10px;border-radius:10px;
  background:rgba(9,13,23,.5);border:1px solid rgba(37,45,64,.8);font-size:12.5px}
.mini-row .mc{font-weight:700;color:#C3CBDE;flex:0 0 auto}
.mini-row .mn{color:#8992A8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mini-row .mk{margin-left:auto;font-size:13px;flex:0 0 auto}
.mini-row.k-keep{border-color:rgba(77,163,255,.3)}
.mini-row.k-keep .mk{color:#4DA3FF}
.mini-row.k-new{border-color:rgba(94,230,168,.32)}
.mini-row.k-new .mk{color:#5EE6A8}
.mini-row.k-drop{opacity:.5}
.mini-row.k-drop .mk{color:#FF8FC0}
.mini-row.k-change .mk{color:#9B8CFF}

.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:var(--sp-sm);font-size:12.5px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{font-style:normal;font-size:13px}

.impact{display:grid;gap:11px;margin-top:var(--sp-md)}
.impact-row{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:12px;align-items:center;font-size:13px}
.impact-row span{color:#AAB4CC}
.impact-track{height:9px;border-radius:99px;background:#141A28;overflow:hidden}
.impact-fill{display:block;height:100%;border-radius:99px;width:0;transition:width 1s var(--ease)}
.impact-fill.f-done{background:linear-gradient(90deg,#3E6ACF,#4DA3FF)}
.impact-fill.f-keep{background:linear-gradient(90deg,#4DA3FF,#7E8DFF)}
.impact-fill.f-new{background:linear-gradient(90deg,#5EE6A8,#4DA3FF)}
.impact-val{font-size:12.5px;color:#6C768E;font-variant-numeric:tabular-nums}

.stat-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-md)}
.stat{
  flex:1 1 170px;padding:14px 16px;border-radius:16px;
  background:rgba(19,25,40,.62);border:1px solid rgba(37,45,64,.95);
}
.stat b{display:block;font-size:22px;font-weight:800;letter-spacing:-.03em}
.stat span{font-size:12.5px;color:var(--muted)}
.stat.s-new b{color:#8FE3BC}
.stat.s-warn b{color:#FF9EC8}
.stat.s-keep b{color:#7FC0FF}

.action-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:var(--sp-md)}
.action-note{font-size:12.5px;color:#6C768E}

.notice{
  display:flex;gap:11px;align-items:flex-start;margin-top:var(--sp-md);
  padding:13px 15px;border-radius:14px;font-size:13px;color:#C3CBDE;
  background:rgba(255,168,120,.06);border:1px solid rgba(255,168,120,.26);
}
.notice b{color:#FFC69B;font-weight:700}
.disclaimer{margin-top:var(--sp-sm);font-size:12px;color:#6C768E}

/* ---------- 10. Tutorial ---------- */
.tutorial{
  position:absolute;z-index:20;width:236px;padding:14px 15px 13px;border-radius:15px;
  background:rgba(18,24,40,.94);border:1px solid rgba(123,124,255,.45);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 30px 60px -28px rgba(0,0,0,1),0 0 40px -22px rgba(123,124,255,.95);
  opacity:0;transform:translateY(8px);transition:opacity .45s ease,transform .45s var(--ease);
}
.tutorial.is-on{opacity:1;transform:none}
.tutorial.is-out{opacity:0;transform:translateY(-6px) scale(.97)}
.tutorial::after{
  content:"";position:absolute;width:10px;height:10px;rotate:45deg;
  background:rgba(18,24,40,.94);border:1px solid rgba(123,124,255,.45);
}
.tutorial[data-side="right"]::after{left:-6px;top:24px;border-right:0;border-top:0}
.tutorial[data-side="left"]::after{right:-6px;top:24px;border-left:0;border-bottom:0}
.tutorial[data-side="top"]::after{bottom:-6px;left:26px;border-left:0;border-top:0}
.tutorial[data-side="bottom"]::after{top:-6px;left:26px;border-right:0;border-bottom:0}
.tut-step{font-size:10.5px;font-weight:700;letter-spacing:.08em;color:#8E9BC4}
.tut-title{font-size:13.5px;font-weight:700;margin-top:6px}
.tut-text{font-size:12.5px;color:#98A2B8;margin-top:4px;line-height:1.45}
.tut-close{
  position:absolute;top:9px;right:9px;width:22px;height:22px;border-radius:7px;cursor:pointer;
  background:rgba(255,255,255,.05);border:1px solid rgba(60,74,110,.8);color:#98A2B8;
  display:grid;place-items:center;font-size:13px;line-height:1;padding:0;font-family:inherit;
  transition:color .25s ease,background .25s ease;
}
.tut-close:hover{color:var(--text);background:rgba(255,255,255,.1)}
.tut-dots{display:flex;gap:5px;margin-top:11px}
.tut-dots i{width:14px;height:3px;border-radius:99px;background:rgba(255,255,255,.14)}
.tut-dots i.on{background:linear-gradient(90deg,#4DA3FF,#9B8CFF)}

/* ---------- 11. Interactions ---------- */
.course.is-dragging{
  position:fixed;z-index:60;width:var(--dw);cursor:grabbing;pointer-events:none;
  rotate:-1.2deg;scale:1.03;opacity:1;animation:none;transition:none;
  box-shadow:0 40px 70px -28px rgba(0,0,0,1),0 0 48px -18px rgba(123,124,255,.95);
}
.drop-ghost{border-radius:13px;border:1px dashed rgba(91,124,255,.5);background:rgba(91,124,255,.06)}
.course.snap-back{animation:snap-shake .45s ease}
@keyframes snap-shake{25%{translate:-5px 0}50%{translate:5px 0}75%{translate:-3px 0}}

.toast{
  position:fixed;left:50%;bottom:26px;translate:-50% 14px;z-index:80;
  padding:12px 18px;border-radius:13px;font-size:13.5px;font-weight:600;
  background:var(--glass-strong);border:1px solid rgba(91,124,255,.42);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 28px 54px -28px rgba(0,0,0,1);
  opacity:0;pointer-events:none;transition:opacity .3s ease,translate .4s var(--ease);
}
.toast.is-on{opacity:1;translate:-50% 0}

/* ---------- 12. Responsive ---------- */
@media (max-width:1200px){
  .explore-page{--rail:290px}
}
@media (max-width:1040px){
  .map-layout{grid-template-columns:1fr}
  .rail{position:static;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}
  .tutorial{display:none}
}
@media (max-width:860px){
  .futures{grid-template-columns:1fr}
  .impact-row{grid-template-columns:120px minmax(0,1fr) auto}
}
@media (max-width:760px){
  .explore-head{padding:110px 0 0}
  .work{padding:var(--sp-sm) 0 90px}
  .tab{padding:11px 17px;font-size:14px}
  .config{padding:15px}
  .config-actions{width:100%}
  .config-actions .btn{flex:1;justify-content:center}
  .year-row{grid-template-columns:1fr;gap:10px}
  .year-rail{grid-template-rows:auto;grid-auto-flow:column;align-items:center;gap:10px;justify-items:center}
  .year-line{width:100%;height:1px;min-height:0;margin:0;
    background:linear-gradient(90deg,rgba(91,124,255,.55),transparent)}
  .sem-cols{grid-template-columns:1fr}
  .impact-row{grid-template-columns:1fr;gap:6px}
  .impact-val{justify-self:start}
}

/* ============================================================
   13. Comparison box — bars, stats and actions in one panel
   ============================================================ */
.compare-box{
  position:relative;margin-top:var(--sp-md);padding:22px;border-radius:var(--radius-l);
  background:linear-gradient(165deg,rgba(23,29,45,.72),rgba(13,18,30,.82));
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid transparent;
}
.compare-box::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(150deg,rgba(91,124,255,.5),rgba(155,140,255,.24) 45%,rgba(37,45,64,.6));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.compare-box > .legend{margin-top:0}
.compare-box > .impact{margin-top:var(--sp-md)}
.compare-box > .stat-row{margin-top:var(--sp-md)}
.compare-box > .notice{margin-top:var(--sp-md)}
.compare-box > .action-row{
  margin-top:var(--sp-md);padding-top:var(--sp-md);
  border-top:1px solid rgba(37,45,64,.9);
}
.compare-box > .disclaimer{margin-top:12px}
.impact-track{min-width:0}

/* the map always gets clear air beneath the comparison panel */
.map-layout{margin-top:var(--sp-xl)}
.view > .section-title:first-child{margin-bottom:var(--sp-md)}