:root{
  --ink:#14211f;--muted:#61716d;--paper:#edf3f1;--card:#fff;
  --line:#d8e3df;--line-strong:#c4d4ce;--teal:#087f72;--teal-dark:#075f58;
  --teal-soft:#e4f4ef;--amber:#f2a33a;--danger:#b9473d;
  --shadow:0 16px 42px rgba(25,56,51,.08);--shadow-sm:0 5px 18px rgba(25,56,51,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;min-width:320px;background:
  radial-gradient(circle at 8% 0%,rgba(8,127,114,.07),transparent 30rem),var(--paper);
  color:var(--ink);font:16px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
button,input,select{font:inherit}
button{-webkit-tap-highlight-color:transparent}
button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(8,127,114,.2);outline-offset:2px}

.topbar{
  min-height:72px;padding:11px max(20px,calc((100vw - 1180px)/2));
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:rgba(255,255,255,.9);border-bottom:1px solid rgba(196,212,206,.85);
  position:sticky;top:0;z-index:30;backdrop-filter:blur(14px);
}
.brand{display:flex;gap:11px;align-items:center;flex:0 0 auto}
.brand div{display:grid;line-height:1.15}
.brand strong{font-size:1rem;letter-spacing:-.01em}
.brand small{color:var(--muted);margin-top:4px;font-size:.73rem}
.mark{
  width:40px;height:40px;border-radius:12px;background:linear-gradient(145deg,var(--teal),var(--teal-dark));
  color:#fff;display:grid;place-items:center;font-weight:850;box-shadow:0 8px 18px rgba(8,127,114,.23);
}
.top-actions,.result-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
main{max-width:1180px;margin:auto;padding:34px 24px 72px}

.intro{
  display:flex;justify-content:space-between;align-items:end;gap:32px;
  margin:0 0 24px;padding:0 2px;
}
.intro>div:first-child{max-width:690px}
.eyebrow{font-size:.72rem;letter-spacing:.14em;font-weight:850;color:var(--teal);margin:0 0 7px}
.intro h1{
  font-size:clamp(2.05rem,4.4vw,3.5rem);line-height:1.03;letter-spacing:-.05em;
  margin:0 0 10px;max-width:680px;
}
.intro p:not(.eyebrow){margin:0;color:var(--muted);max-width:650px;font-size:.98rem}
.status{
  display:flex;align-items:center;gap:11px;background:rgba(255,255,255,.86);
  border:1px solid var(--line);padding:12px 15px;border-radius:14px;min-width:228px;box-shadow:var(--shadow-sm);
}
.status>span{width:9px;height:9px;border-radius:50%;background:#18a98f;box-shadow:0 0 0 5px rgba(24,169,143,.12)}
.status div{display:grid;line-height:1.25}.status strong{font-size:.86rem}.status small{color:var(--muted);font-size:.74rem;margin-top:3px}

.workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}
.panel,.summary,.results{border-radius:20px;box-shadow:var(--shadow)}
.panel,.results{background:var(--card);border:1px solid var(--line)}
.controls{padding:0;overflow:hidden}
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0;padding:10px;
  background:#f7faf9;border-bottom:1px solid var(--line);
}
.step{
  min-height:48px;border:0;background:transparent;color:var(--muted);padding:8px 10px;
  border-radius:11px;font-weight:750;cursor:pointer;transition:.16s ease;
}
.step:hover{background:#edf5f2;color:var(--teal-dark)}
.step span{
  display:inline-grid;place-items:center;width:25px;height:25px;border-radius:50%;
  background:#e5ece9;margin-right:6px;font-size:.8rem;
}
.step.active{background:var(--teal-soft);color:var(--teal-dark)}
.step.active span{background:var(--teal);color:#fff;box-shadow:0 4px 9px rgba(8,127,114,.18)}
.step-pane{display:none;min-height:410px;padding:28px}
.step-pane.active{display:block}
.step-pane h2,.results h2,.modal h2{margin:0;font-size:1.38rem;letter-spacing:-.025em}
.step-pane>p,.pane-head p{margin:5px 0 0;color:var(--muted);font-size:.87rem}
.pane-head{display:flex;justify-content:space-between;align-items:start;gap:16px;margin-bottom:18px}

.grid{display:grid;gap:17px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:20px}
.span-two{grid-column:1/-1}
label{display:grid;gap:7px;color:#40514d;font-size:.83rem;font-weight:750}
.field-label{display:block;color:#40514d;font-size:.83rem;font-weight:750;margin-bottom:8px}
input,select{
  width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--line-strong);
  border-radius:11px;background:#fff;color:var(--ink);outline:none;transition:.16s ease;
}
input:hover,select:hover{border-color:#aebfba}
input:focus,select:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(8,127,114,.09)}
.mode-switch{display:grid;grid-template-columns:1fr 1fr;background:#edf3f1;padding:4px;border-radius:12px;gap:3px}
.mode-switch label{position:relative}
.mode-switch input{position:absolute;opacity:0;pointer-events:none}
.mode-switch span{
  display:grid;place-items:center;min-height:40px;padding:9px 12px;border-radius:9px;
  text-align:center;cursor:pointer;color:var(--muted);font-size:.82rem;transition:.15s ease;
}
.mode-switch input:checked+span{background:#fff;color:var(--teal-dark);box-shadow:0 3px 11px rgba(20,55,50,.1)}

fieldset{border:0;padding:0;margin:20px 0 0}
legend{font-size:.83rem;font-weight:750;color:#40514d;margin-bottom:9px}
.checks{display:flex;gap:7px;flex-wrap:wrap}
.day-chip,.map-chip{position:relative;display:inline-block}
.day-chip input,.map-chip input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.day-chip span{
  display:block;min-width:55px;padding:9px 11px;border:1px solid var(--line);
  border-radius:10px;text-align:center;color:var(--muted);cursor:pointer;background:#fff;
}
.day-chip input:checked+span{background:var(--teal);color:#fff;border-color:var(--teal);box-shadow:0 5px 12px rgba(8,127,114,.16)}
.day-chip:focus-within span,.map-chip:focus-within span{outline:3px solid rgba(8,127,114,.18);outline-offset:2px}

.subject-strategy{padding:15px;background:#f4f8f6;border:1px solid var(--line);border-radius:14px;margin-bottom:14px}
.subject-strategy p{margin:8px 2px 0;color:var(--muted);font-size:.8rem}
.stack{display:grid;gap:11px;max-height:none;overflow:visible}
.item-card{border:1px solid var(--line);border-radius:14px;padding:15px;background:#fbfdfc;box-shadow:0 2px 0 rgba(25,56,51,.02)}
.item-row{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:11px;align-items:end}
.subject-row{grid-template-columns:minmax(155px,2fr) .9fr .9fr 64px .9fr 40px}
.teacher-row{grid-template-columns:minmax(155px,1fr) minmax(240px,2fr) 40px}
.color-input{height:44px;min-height:44px;padding:4px;cursor:pointer}
.week-field.hidden{display:none}
.week-tag{font-size:.72rem;color:var(--teal);font-weight:800;margin-top:2px}
.mapping{display:flex;gap:7px;flex-wrap:wrap;align-items:center;min-height:44px;margin-top:7px}
.map-chip{font-size:.78rem}
.map-chip span{display:block;border:1px solid var(--line);border-radius:999px;padding:7px 10px;cursor:pointer;color:var(--muted);background:#fff}
.map-chip input:checked+span{background:#dcf3ed;border-color:#91d3c4;color:#07675e;font-weight:750}

.primary,.secondary,.ghost{
  min-height:42px;border-radius:10px;padding:9px 14px;font-weight:750;cursor:pointer;transition:.15s ease;
}
.primary{border:1px solid var(--teal);background:var(--teal);color:#fff;box-shadow:0 5px 13px rgba(8,127,114,.15)}
.primary:hover{background:var(--teal-dark);border-color:var(--teal-dark);transform:translateY(-1px)}
.secondary,.ghost{border:1px solid var(--line-strong);background:#fff;color:var(--ink)}
.secondary:hover,.ghost:hover{border-color:#9eb5ae;background:#f9fbfa}
button:disabled{opacity:.4;cursor:not-allowed;transform:none!important}
.remove{border:0;background:#fff0ed;color:var(--danger);width:40px;height:42px;border-radius:10px;cursor:pointer;font-size:1.25rem}
.remove:hover{background:#fde2dd}
.actions{display:flex;justify-content:flex-end;gap:9px;border-top:1px solid var(--line);margin:0;padding:18px 28px;background:#fafcfb}
.hidden{display:none!important}

.summary{
  padding:23px;background:linear-gradient(155deg,#174d47,#123a37 72%);color:#fff;
  position:sticky;top:91px;border:1px solid rgba(255,255,255,.08);
}
.summary .eyebrow{color:#8cddd0}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:16px 0 19px;border-bottom:1px solid rgba(255,255,255,.14)}
.metrics div{display:grid}.metrics strong{font-size:1.55rem;letter-spacing:-.03em}.metrics span,.summary-block span{font-size:.7rem;color:#abc9c4}
.summary-block{display:flex;justify-content:space-between;align-items:start;gap:15px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.13)}
.summary-block strong{text-align:right;font-size:.84rem;max-width:160px}
.tip{margin-top:18px;padding:14px;border-radius:12px;background:rgba(255,255,255,.075);border:1px solid rgba(255,255,255,.06)}
.tip strong{font-size:.8rem}.tip p{font-size:.75rem;color:#bad0cc;margin:5px 0 0;line-height:1.5}

.results{margin-top:20px;padding:24px}
.results-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:18px}
.alert{padding:13px 15px;border-radius:11px;margin-bottom:9px;background:#fff5e7;color:#78501c;border:1px solid #efd099;font-size:.86rem}
.alert.error{background:#fff0ed;color:#873b34;border-color:#eebbb5}
.view-tabs{display:flex;gap:4px;margin:18px 0;padding:4px;background:#edf3f1;border-radius:11px;width:max-content;max-width:100%}
.view-tab{border:0;background:transparent;color:var(--muted);padding:9px 14px;border-radius:8px;font-weight:750;cursor:pointer}
.view-tab.active{background:#fff;color:var(--teal);box-shadow:0 2px 8px rgba(20,60,55,.09)}
.day-section{margin-top:22px}.day-section:first-child{margin-top:0}
.day-title{display:flex;align-items:baseline;gap:11px;margin:0 2px 9px}
.day-title h3{margin:0;font-size:.98rem}.day-title span{color:var(--muted);font-size:.76rem}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:13px;background:#fff;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:700px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:.84rem;white-space:nowrap}
th{background:#f4f8f6;color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.055em}
tbody tr:hover{background:#fbfdfc}tr:last-child td{border-bottom:0}
.badge{display:inline-block;background:#e1f2ee;color:#086b61;border-radius:999px;padding:4px 8px;font-weight:750;font-size:.72rem}
.subject-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px;border:1px solid rgba(0,0,0,.14)}
.compact-table{border:2px solid #252525}.compact-table th{background:#3d1462;color:#fff;text-align:center;font-size:.82rem;text-transform:none}
.compact-table td{border:1px solid #252525;text-align:center;font-size:.9rem}.compact-table tbody tr:hover{background:transparent}
.compact-table .compact-day{background:#f1f3f7;font-weight:750;min-width:138px}.compact-table .skill-cell{font-weight:750}
.teacher-note{display:block;font-size:.68rem;font-weight:500;opacity:.76;margin-top:2px}

.modal{width:min(560px,calc(100% - 28px));border:1px solid var(--line);border-radius:18px;padding:22px;color:var(--ink);box-shadow:0 28px 90px rgba(15,35,32,.3)}
.modal::backdrop{background:rgba(13,28,26,.58);backdrop-filter:blur(4px)}.modal form{margin:0}
.modal-head{display:flex;align-items:start;justify-content:space-between;gap:16px;margin-bottom:18px}
.icon-btn{border:0;background:#edf2f0;border-radius:9px;width:40px;height:40px;font-size:1.4rem;cursor:pointer}
.modal-note{font-size:.78rem;color:var(--muted);margin:10px 0 0}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}
.modal.fallback-open{position:fixed;inset:50% auto auto 50%;transform:translate(-50%,-50%);z-index:1000;max-height:85vh;overflow:auto}
.saved-list{display:grid;gap:9px;max-height:60vh;overflow:auto;padding-right:2px}
.saved-entry{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:13px;background:#fbfdfc}
.saved-entry strong,.saved-entry small{display:block}.saved-entry small{color:var(--muted);margin-top:3px;font-size:.75rem}.saved-actions{display:flex;gap:6px}
.saved-actions button{padding:7px 10px;min-height:38px}.empty-saved{text-align:center;padding:34px 12px;color:var(--muted);background:#f4f8f6;border-radius:12px}
.toast{position:fixed;right:22px;bottom:22px;background:#153f3b;color:#fff;padding:12px 16px;border-radius:11px;box-shadow:var(--shadow);opacity:0;transform:translateY(12px);pointer-events:none;transition:.2s;z-index:80}
.toast.show{opacity:1;transform:translateY(0)}
.site-footer{text-align:center;color:var(--muted);font-size:.8rem;padding:34px 0 0}.site-footer strong{color:var(--teal)}
.info-card{margin:15px 0 18px;border:1px solid #cfe4de;border-radius:13px;background:linear-gradient(135deg,#f3faf7,#f8fbfa);overflow:hidden}
.info-card summary{display:flex;align-items:center;gap:9px;padding:11px 13px;cursor:pointer;list-style:none;color:#31524c;font-size:.8rem;user-select:none}
.info-card summary::-webkit-details-marker{display:none}.info-icon{width:21px;height:21px;display:grid;place-items:center;border-radius:50%;background:var(--teal);color:#fff;font-weight:850;font-size:.72rem;flex:0 0 auto}.info-card .chevron{margin-left:auto;font-size:1rem;transition:transform .25s ease}.info-card[open] .chevron{transform:rotate(180deg)}.info-content{padding:0 13px 13px 43px;color:var(--muted);font-size:.79rem;line-height:1.55}.result-info{margin:12px 0 15px}
.step-pane.active{animation:paneIn .34s cubic-bezier(.2,.75,.25,1)}.item-card{animation:cardIn .32s ease both}.item-card:nth-child(2){animation-delay:.035s}.item-card:nth-child(3){animation-delay:.07s}.item-card:nth-child(4){animation-delay:.105s}.item-card:nth-child(n+5){animation-delay:.13s}.results:not(.hidden){animation:resultIn .48s cubic-bezier(.2,.8,.2,1)}.day-section{animation:rowIn .36s ease both}.day-section:nth-child(2){animation-delay:.05s}.day-section:nth-child(3){animation-delay:.1s}.day-section:nth-child(4){animation-delay:.15s}.day-section:nth-child(n+5){animation-delay:.18s}.metrics strong.metric-pop{animation:metricPop .28s ease}.primary:active,.secondary:active,.ghost:active,.step:active,.view-tab:active{transform:scale(.97)}.mark{animation:markFloat 4s ease-in-out infinite}.status>span{animation:statusPulse 2.2s ease-out infinite}
@keyframes paneIn{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
@keyframes cardIn{from{opacity:0;transform:translateY(8px) scale(.992)}to{opacity:1;transform:none}}
@keyframes resultIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes rowIn{from{opacity:0;transform:translateX(-7px)}to{opacity:1;transform:none}}
@keyframes metricPop{0%{transform:scale(1)}45%{transform:scale(1.14);color:#8cddd0}100%{transform:scale(1)}}
@keyframes markFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}}
@keyframes statusPulse{0%{box-shadow:0 0 0 0 rgba(24,169,143,.25)}70%,100%{box-shadow:0 0 0 8px rgba(24,169,143,0)}}

@media(max-width:1040px){
  .workspace{grid-template-columns:minmax(0,1fr) 270px}
  .subject-row{grid-template-columns:1.5fr 1fr 1fr 68px}
  .subject-row .week-field{grid-column:1/2}.subject-row .remove{grid-column:4;grid-row:2}
}
@media(max-width:820px){
  .topbar{position:static}
  main{padding:25px 18px 60px}
  .intro{align-items:start;flex-direction:column;gap:16px}
  .intro h1{font-size:2.35rem}
  .status{width:100%;min-width:0}
  .workspace{grid-template-columns:1fr}
  .summary{position:static;order:-1;padding:19px}
  .metrics div{text-align:center}.summary-block strong{max-width:60%}
  .step-pane{padding:23px}.actions{padding:16px 23px}
  .teacher-row{grid-template-columns:1fr 40px}.teacher-row>div{grid-column:1/-1;grid-row:2}.teacher-row .remove{grid-column:2;grid-row:1}
}
@media(max-width:600px){
  body{font-size:16px;background:var(--paper)}
  .topbar{padding:10px 14px;display:grid;grid-template-columns:1fr;gap:9px;background:#fff}
  .brand{justify-content:center}.top-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
  .top-actions button{min-height:40px;padding:7px 6px;font-size:.74rem;white-space:nowrap}
  main{padding:20px 12px 48px}
  .intro{margin-bottom:17px;padding:0 3px}.intro h1{font-size:2rem;line-height:1.05}.intro p:not(.eyebrow){font-size:.88rem}
  .panel,.summary,.results{border-radius:16px}.steps{padding:7px}
  .step{min-height:44px;padding:7px 4px;font-size:.74rem}.step span{display:grid;margin:0 auto 3px;width:22px;height:22px}
  .step-pane{padding:19px 15px;min-height:0}.step-pane h2,.results h2,.modal h2{font-size:1.22rem}
  .pane-head{align-items:center}.pane-head .secondary{padding:8px 10px;min-height:40px;white-space:nowrap}
  .grid.two{grid-template-columns:1fr;gap:14px}.span-two{grid-column:auto}
  .mode-switch{grid-template-columns:1fr}.mode-switch span{min-height:41px}
  .checks{display:grid;grid-template-columns:repeat(4,1fr)}.day-chip span{min-width:0;padding:9px 4px}
  .subject-strategy{padding:12px}
  .subject-row,.item-row{grid-template-columns:1fr 1fr;gap:12px}
  .subject-row>label:first-child{grid-column:1/-1}.subject-row .week-field{grid-column:1}.subject-row .remove{grid-column:2;grid-row:auto;justify-self:end;align-self:end}
  .teacher-row{grid-template-columns:1fr 40px}.mapping{gap:8px}.map-chip span{padding:8px 11px}
  .actions{position:sticky;bottom:0;z-index:12;padding:12px 15px;background:rgba(255,255,255,.95);backdrop-filter:blur(10px)}
  .actions button{flex:1}.actions .primary{min-width:0}
  .summary{padding:17px}.metrics{padding-top:10px}.metrics strong{font-size:1.35rem}
  .results{padding:17px 12px}.results-head{align-items:flex-start;flex-direction:column;margin-bottom:14px}.result-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .result-actions button{padding:8px 7px;font-size:.78rem}
  .view-tabs{display:grid;grid-template-columns:1fr 1fr;width:100%}.view-tab{padding:9px 7px;font-size:.78rem}
  .day-title{display:grid;gap:2px}.day-title h3{font-size:.92rem}
  .table-wrap{margin-left:0;margin-right:0;border-radius:10px}
  table{min-width:650px}.compact-table{min-width:600px}th,td{padding:10px 11px;font-size:.8rem}
  .modal{padding:18px 15px;border-radius:15px}.modal-actions{display:grid;grid-template-columns:1fr 1fr}
  .saved-entry{grid-template-columns:1fr}.saved-actions{justify-content:flex-end}.saved-actions .secondary{flex:1}
  .toast{left:12px;right:12px;bottom:14px;text-align:center}
}
@media(max-width:380px){
  .top-actions{grid-template-columns:1fr 1fr}.top-actions #resetBtn{grid-column:1/-1}
  .checks{grid-template-columns:repeat(3,1fr)}
}
@media print{
  body{background:#fff}.topbar,.intro,.workspace,.results-head button,.view-tabs,.site-footer{display:none}
  .results{display:block!important;box-shadow:none;border:0;margin:0;padding:0}
  .schedule-view.hidden{display:none!important}main{padding:0}.table-wrap{break-inside:avoid}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}