:root{
  --bg: #0b0c10;
  --panel: rgba(255,255,255,0.06);
  --text: rgba(255,255,255,0.92);
  --mutedText: rgba(255,255,255,0.65);
  --stroke: rgba(255,255,255,0.10);
  --glow: rgba(255,255,255,0.18);
  --drawer-open: 280px;
  --drawer-toggle-size: 44px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: -apple-system, system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* Fixed, non-scrolling background glow */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1200px 600px at 20% 0%, rgba(255,255,255,0.06), transparent),
    radial-gradient(1200px 600px at 80% 0%, rgba(255,255,255,0.05), transparent);
}

.drawer{
  position: fixed;
  inset: 0 0 0 auto;
  width: var(--drawer-open);
  background: rgba(9,10,14,0.94);
  border-left: 1px solid var(--stroke);
  display:flex;
  flex-direction:column;
  align-items:stretch;
  gap: 16px;
  padding: 18px 12px;
  transform: translateX(100%);
  transition: transform 0.2s ease;
  z-index: 2;
  backdrop-filter: blur(10px);
}
.drawer.is-open{
  transform: translateX(0);
}
.drawer-scrim{
  position: fixed;
  inset: 0;
  background: rgba(3,4,8,0.55);
  z-index: 1;
}
.drawer-toggle{
  position: fixed;
  top: 16px;
  right: 16px;
  width: var(--drawer-toggle-size);
  height: var(--drawer-toggle-size);
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: var(--panel);
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap: 6px;
  cursor:pointer;
  z-index: 3;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.drawer-toggle span{
  display:block;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.drawer-toggle.is-open span:nth-child(1){
  transform: translateY(8px) rotate(45deg);
}
.drawer-toggle.is-open span:nth-child(2){
  opacity: 0;
}
.drawer-toggle.is-open span:nth-child(3){
  transform: translateY(-8px) rotate(-45deg);
}
.drawer-panel{
  display:flex;
  flex-direction:column;
  gap: 12px;
  padding-top: calc(var(--drawer-toggle-size) + 12px);
}
.drawer-section{
  display:flex;
  flex-direction:column;
  gap: 8px;
  padding-top: 4px;
  border-top: 1px solid var(--stroke);
}
.drawer-section-title{
  font-size: 12px;
  color: var(--mutedText);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.saved-list{
  display:flex;
  flex-direction:column;
  gap: 8px;
}
.saved-item{
  display:flex;
  align-items:center;
  gap: 8px;
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.04);
  color: var(--text);
}
.saved-item.is-active{
  border-color: rgba(120,255,180,0.6);
  box-shadow: 0 0 0 3px rgba(120,255,180,0.18);
  background: rgba(120,255,180,0.08);
}
.saved-load{
  flex: 1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 8px;
  padding: 8px 10px;
  border: 0;
  background: transparent;
  color: inherit;
  text-align:left;
  cursor:pointer;
}
.saved-load span{
  flex:1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.saved-load time{
  font-size: 10px;
  color: var(--mutedText);
  white-space: nowrap;
}
.saved-delete{
  width: 28px;
  height: 28px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  cursor: pointer;
}
.saved-empty{
  font-size: 12px;
  color: var(--mutedText);
  padding: 8px 6px;
}
.drawer .tabs{
  flex-direction:column;
  align-items:stretch;
}
.drawer .tab{
  width: 100%;
  text-align:left;
}
.drawer .tab,
.drawer .btn{
  display:flex;
  align-items:center;
  justify-content:flex-start;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
}

.app-header{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  padding:18px 18px 10px;
}

.title h1{ margin:0; font-size:20px; }
.subtitle{ margin:6px 0 0; color: var(--mutedText); font-size:13px; }

.tabs{ display:flex; gap:8px; }
.tab{
  border:1px solid var(--stroke);
  background: var(--panel);
  color: var(--text);
  padding:10px 12px;
  border-radius: 999px;
  cursor:pointer;
  transition: transform .15s ease, background .15s ease;
}
.tab:hover{ transform: translateY(-1px); }
.tab.active{ background: rgba(255,255,255,0.12); }

.controls{
  padding: 10px 18px 14px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.control-row{
  display:flex;
  gap:10px;
  align-items:center;
}

input[type="search"]{
  flex:1;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  outline: none;
}

.btn{
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  cursor:pointer;
}

.mode-hint{ color: var(--mutedText); font-size: 13px; }

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.pill{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.06);
}
.pill.muted{ opacity: .6; }
.pill.prereq{ background: rgba(120,200,255,0.12); }
.pill.unlocked{ background: rgba(140,255,180,0.12); }
.pill.selected{ background: rgba(255,255,255,0.14); }
.pill.glow{ box-shadow: 0 0 0 6px rgba(255,255,255,0.03); }

/* ===== Plan Area (now 4 grade boxes) ===== */
.plan-strip{
  padding: 12px 18px 18px;
  margin: 0 18px 20px;
  border: 1px dashed rgba(255,255,255,0.35);
  border-radius: 20px;
  background:
    radial-gradient(circle at top left, rgba(120,200,255,0.16), transparent 60%),
    rgba(255,255,255,0.05);
  box-shadow: 0 16px 40px rgba(0,0,0,0.28);
}
.plan-title{
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.72);
  margin-bottom: 6px;
}
.plan-subtitle{
  font-size: 13px;
  color: var(--mutedText);
  margin-bottom: 14px;
}

.plan-wrap{
  position: relative;
}

.plan{
  position: relative;
  display:grid;
  grid-template-columns: repeat(4, minmax(220px, 1fr));
  gap: 12px;
  align-items: start;
}

.plan-col{
  border: 1px solid var(--stroke);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  overflow:hidden;
  min-height: 140px;
}

.plan-col-title{
  padding: 10px 12px;
  font-weight: 700;
  border-bottom: 1px solid var(--stroke);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}

.plan-col-subtitle{
  font-weight: 500;
  font-size: 11px;
  color: var(--mutedText);
}

.plan-col-body{
  padding: 12px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.plan-empty{
  color: var(--mutedText);
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px dashed var(--stroke);
}

/* Smaller plan cards (still "course-card" semantics, separate class) */
.plan-card{
  text-align:left;
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor:pointer;
  transition: transform .18s ease, filter .18s ease, opacity .18s ease, box-shadow .18s ease;
}
.plan-card:hover{ transform: translateY(-1px); }

.plan-card .course-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.plan-card .course-code{ font-weight: 800; }
.plan-card .course-level{ font-size: 12px; color: var(--mutedText); }
.plan-card .course-name{ margin-top: 6px; font-size: 13px; }
.plan-card .course-meta{ margin-top: 6px; font-size: 11px; color: var(--mutedText); }

/* Plan wires overlay */
.plan-wires{
  position:absolute;
  inset: 0;
  pointer-events:none;
  overflow:visible;
}

/* ===== Board Area ===== */
.board-wrap{
  position:relative;
  padding: 0 18px 24px;
}
.board{
  position:relative;
  display:grid;
  grid-template-columns: repeat(4, minmax(240px, 1fr));
  gap: 14px;
  align-items:start;
}

.col{
  border: 1px solid var(--stroke);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  overflow:hidden;
}
.col-title{
  padding: 10px 12px;
  font-weight: 700;
  border-bottom: 1px solid var(--stroke);
}
.col-body{
  padding: 12px;
  display:flex;
  flex-direction:column;
  gap:10px;
  min-height: 260px;
}

.course-card{
  text-align:left;
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor:pointer;
  transition: transform .18s ease, filter .18s ease, opacity .18s ease, box-shadow .18s ease;
}
.course-card:hover{ transform: translateY(-1px); }

.course-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.course-code{ font-weight: 800; }
.course-level{ font-size: 12px; color: var(--mutedText); }
.course-name{ margin-top: 6px; font-size: 13px; }
.course-meta{ margin-top: 6px; font-size: 11px; color: var(--mutedText); }

.course-card.muted{
  opacity: 0.35;
  filter: grayscale(0.35);
}

.course-card.prereq{
  box-shadow: 0 0 0 3px rgba(120,200,255,0.10);
}

.course-card.unlocked{
  opacity: 1;
  filter: none;
  box-shadow: 0 0 0 3px rgba(140,255,180,0.10);
}

.course-card.selected{
  box-shadow: 0 0 0 3px rgba(255,255,255,0.14), 0 10px 30px rgba(0,0,0,0.25);
}

.course-card.glow{
  box-shadow: 0 0 0 6px rgba(255,255,255,0.05);
}

/* Plan card states can reuse same styles */
.plan-card.muted{
  opacity: 0.35;
  filter: grayscale(0.35);
}
.plan-card.prereq{ box-shadow: 0 0 0 3px rgba(120,200,255,0.10); }
.plan-card.selected{
  box-shadow: 0 0 0 3px rgba(255,255,255,0.14), 0 10px 30px rgba(0,0,0,0.25);
}
.plan-card.glow{ box-shadow: 0 0 0 6px rgba(255,255,255,0.05); }

/* Subject pastel placeholders */
.subject-math{ background: rgba(140,170,255,0.14); }
.subject-science{ background: rgba(160,255,200,0.12); }
.subject-english{ background: rgba(255,200,160,0.12); }
.subject-compsci{ background: rgba(220,180,255,0.12); }
.subject-business{ background: rgba(255,210,140,0.12); }
.subject-technology{ background: rgba(120,220,220,0.12); }
.subject-french{ background: rgba(140,170,255,0.12); }
.subject-cws{ background: rgba(190,170,255,0.12); }
.subject-social_sciences{ background: rgba(210,160,220,0.12); }
.subject-health{ background: rgba(170,230,170,0.12); }
.subject-arts{ background: rgba(255,160,180,0.12); }
.subject-guidance{ background: rgba(255,235,150,0.12); }
.subject-coop{ background: rgba(160,190,255,0.12); }
.subject-other{ background: rgba(255,255,255,0.06); }



/* Board wires */
.wires{
  position:absolute;
  inset: 0 18px 24px 18px;
  pointer-events:none;
  overflow:visible;
}

.wire{
  stroke: rgba(255,255,255,0.22);
  stroke-width: 1.5;
}

.wire-or{
  stroke-dasharray: 5 5;
  opacity: 0.75;
}

.footer{
  padding: 0 18px 18px;
  color: var(--mutedText);
  font-size: 12px;
}
.loading-overlay{
  position: fixed;
  inset: 0;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(3,4,8,0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 4;
}
.loading-overlay.is-visible{
  opacity: 1;
  pointer-events: auto;
}
.loading-spinner{
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 3px solid rgba(255,255,255,0.2);
  border-top-color: rgba(120,255,180,0.9);
  animation: spin 0.9s linear infinite;
}
@keyframes spin{
  to { transform: rotate(360deg); }
}

/* Ensure app content stays above fixed background glow */
body > *{
  position: relative;
  z-index: 1;
}

@media print{
  body{
    background: #fff;
    color: #000;
  }

  body::before,
  .drawer,
  .drawer-scrim,
  .drawer-toggle,
  .controls,
  .board-wrap,
  .footer{
    display: none !important;
  }

  .app-header{
    padding: 0 0 12px;
  }

  .plan-strip{
    padding: 0;
  }

  .plan{
    gap: 16px;
  }

  .plan-col,
  .plan-card,
  .plan-empty{
    background: #fff;
    color: #000;
    border-color: #d0d0d0;
  }

  .plan-wires{
    display: none;
  }
}

/* =========================================================
   Drag & Drop additions (keeps original styling intact)
   ========================================================= */

/* Only the top course in a column is draggable (app.js adds these classes) */
.course-card.not-draggable{ cursor: default; }
.course-card.top-draggable{ cursor: grab; }
.course-card.dragging{ cursor: grabbing; opacity: 0.7; }

/* Drop highlight on plan column */
.plan-col.drop-hover{
  box-shadow:
    0 0 0 3px rgba(255,255,255,0.14),
    0 14px 40px rgba(0,0,0,0.25);
}

/* Red pulsing outer glow when prereqs are missing */
@keyframes prereqPulse{
  0%{
    box-shadow: 0 0 0 3px rgba(255,80,80,0.18), 0 0 14px rgba(255,80,80,0.10);
  }
  50%{
    box-shadow: 0 0 0 3px rgba(255,80,80,0.62), 0 0 22px rgba(255,80,80,0.30);
  }
  100%{
    box-shadow: 0 0 0 3px rgba(255,80,80,0.18), 0 0 14px rgba(255,80,80,0.10);
  }
}

/* Plan: pulse if the course is missing prereqs currently in the plan */
.plan-card.needs-prereq{
  animation: prereqPulse 1.6s ease-in-out infinite;
}

/* Board: pulse the dragged card if it is missing prereqs */
.course-card.drag-warning{
  animation: prereqPulse 1.6s ease-in-out infinite;
}