/* ==========================================================================
   MINIMALIST ARCHITECTURAL STUDY MAP (MODO CLARO)
   Ingeniería en Computación · UNLP (Plan 2011)
   ========================================================================== */

:root {
  /* Harmonious Green & Clean Architectural Paper Palette */
  --bg-canvas: #edf3ee;            /* Soft luminous sage-paper (harmonizes with green) */
  --bg-panel: #ffffff;
  --bg-node: #ffffff;
  --bg-node-hover: #ffffff;
  
  --border-subtle: #cbd7cf;
  --border-node: #cbd5e1;
  --border-active: #064e3b;

  /* Typography Colors */
  --text-main: #0f172a;            /* Deep ink */
  --text-muted: #334155;           /* Crisp charcoal */
  --text-dim: #64748b;             /* Muted graphite */
  --text-mono: #1e293b;

  /* 4 Academic States - Crisp white cards with vibrant status borders */
  --state-aprobada: #059669;        /* Emerald Forest */
  --state-aprobada-bg: #ffffff;
  --state-aprobada-border: #10b981;

  --state-cursada: #0284c7;         /* Sky / Slate Blue */
  --state-cursada-bg: #ffffff;
  --state-cursada-border: #38bdf8;

  --state-en-curso: #d97706;        /* Warm Amber */
  --state-en-curso-bg: #ffffff;
  --state-en-curso-border: #f59e0b;

  --state-pendiente: #64748b;       /* Muted Slate */
  --state-pendiente-bg: #ffffff;
  --state-pendiente-border: #cbd5e1;

  --state-failed-corner: #dc2626;   /* Red corner indicator */

  /* Transitive Traversal Highlights */
  --hl-ancestor: #4f46e5;           /* Indigo: Correlativas previas */
  --hl-ancestor-bg: #eef2ff;
  --hl-ancestor-border: #4f46e5;
  --hl-ancestor-wire: #4338ca;

  --hl-descendant: #0d9488;         /* Teal: Materias a futuro */
  --hl-descendant-bg: #ccfbf1;
  --hl-descendant-border: #0d9488;
  --hl-descendant-wire: #0f766e;

  --hl-current-border: #064e3b;

  /* Dual-Faculty Institutional Theme: Facultad de Informática (Bordeaux Red) & Facultad de Ingeniería (Royal Navy Blue) */
  --top-header-bg: linear-gradient(90deg, #781719 0%, #3a1945 38%, #16325c 75%, #0f244a 100%);
  --top-timeline-bg: linear-gradient(90deg, #5c0f12 0%, #291135 38%, #112344 75%, #0b1a36 100%);
  --top-border: rgba(255, 255, 255, 0.14);
  --top-border-accent: #0b172a;

  /* Dimensions */
  --header-height: 58px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-canvas);
  color: var(--text-main);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

/* Background Subtle Architectural Grid */
.blueprint-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(#b2c4b8 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   CANVAS HEADER: Minimalist Technical Title Block & Blueprint Telemetry
   ========================================================================== */

.canvas-header {
  height: var(--header-height);
  padding: 6px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--top-border);
  background: var(--top-header-bg);
  color: #ffffff !important;
  z-index: 20;
  flex-shrink: 0;
  box-shadow: 0 3px 12px rgba(15, 23, 42, 0.35);
  box-sizing: border-box;
  max-width: 100vw;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-faculty-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  background: transparent;
  padding: 0;
  border: none;
  box-shadow: none;
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), filter 0.18s ease;
  flex-shrink: 0;
}

.brand-faculty-link:hover {
  transform: translateY(-1px) scale(1.05);
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.5));
}

.brand-faculty-logo {
  height: 32px;
  width: auto;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.35));
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 1px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: #fed7aa !important; /* Soft warm peach to harmonize with Informática Bordeaux */
  text-transform: uppercase;
}

.brand-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff !important; /* Pure white - HIGH CONTRAST */
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.2) !important;
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
  color: #ffffff !important;
}

.plan-toggle-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff !important;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  line-height: 1.2;
}

.plan-toggle-badge:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #93c5fd;
  box-shadow: 0 0 10px rgba(147, 197, 253, 0.35);
  transform: translateY(-1px);
}

.plan-toggle-badge:active {
  transform: translateY(0) scale(0.97);
}

.plan-toggle-badge:focus-visible {
  outline: 2px solid #93c5fd;
  outline-offset: 2px;
}

.plan-toggle-badge .plan-toggle-icon {
  font-size: 0.74rem;
  color: #93c5fd;
  display: inline-block;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.plan-toggle-badge:hover .plan-toggle-icon {
  transform: rotate(180deg);
}

.plan-toggle-badge.is-2024 {
  background: rgba(59, 130, 246, 0.3);
  border-color: #93c5fd;
  box-shadow: 0 0 8px rgba(147, 197, 253, 0.25);
}

.plan-toggle-badge.is-2024 #planBadgeText {
  color: #dbeafe;
}


/* HUD Telemetry Written Like Blueprint Annotations */
.hud-telemetry {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'JetBrains Mono', monospace;
  flex-shrink: 0;
  white-space: nowrap;
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
  white-space: nowrap;
  flex-shrink: 0;
}

.hud-label {
  font-size: 0.55rem;
  color: #bfdbfe !important; /* Soft ice blue for high legibility over Navy */
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.hud-value {
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff !important;
  white-space: nowrap;
}

.hud-value.highlight-gpa {
  font-size: 1.16rem;
  font-weight: 800;
  color: #fde047 !important; /* Radiant gold */
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.hud-sub {
  font-size: 0.65rem;
  font-weight: 400;
  color: #cbd5e1 !important;
  white-space: nowrap;
}

/* Minimal Legend with Integrated Counters */
.hud-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-family: 'JetBrains Mono', monospace;
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  white-space: nowrap;
  flex-shrink: 0;
}

.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 6px;
  user-select: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  color: #0f172a !important; /* Crisp dark ink on white pill */
  background: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.5) !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  transition: all 0.18s cubic-bezier(0.2, 0, 0, 1);
  outline: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.legend-chip:hover {
  background: #f8fafc !important;
  color: #0f172a !important;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18);
}

.chip-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 10px;
  background: #e2e8f0;
  color: #1e293b;
  margin-left: 2px;
  line-height: 1;
}

.legend-chip.is-active .chip-count {
  background: rgba(0, 0, 0, 0.1);
  color: inherit;
}

/* Active filter state for each legend button */
.legend-chip.is-active[data-filter="aprobada"] {
  background: #ecfdf5 !important;
  border-color: var(--state-aprobada) !important;
  color: #065f46 !important;
  box-shadow: 0 0 0 1.5px var(--state-aprobada), 0 3px 8px rgba(16, 185, 129, 0.25) !important;
}

.legend-chip.is-active[data-filter="en_curso"] {
  background: #fffbeb !important;
  border-color: var(--state-en-curso) !important;
  color: #92400e !important;
  box-shadow: 0 0 0 1.5px var(--state-en-curso), 0 3px 8px rgba(245, 158, 11, 0.25) !important;
}

.legend-chip.is-active[data-filter="cursada_aprobada"] {
  background: #f0f9ff !important;
  border-color: var(--state-cursada) !important;
  color: #0369a1 !important;
  box-shadow: 0 0 0 1.5px var(--state-cursada), 0 3px 8px rgba(2, 132, 199, 0.25) !important;
}

.legend-chip.is-active[data-filter="pendiente"] {
  background: #f8fafc !important;
  border-color: #64748b !important;
  color: #334155 !important;
  box-shadow: 0 0 0 1.5px #64748b, 0 3px 8px rgba(100, 116, 139, 0.25) !important;
}

.legend-chip.is-active[data-filter="recursa"] {
  background: #fef2f2 !important;
  border-color: var(--state-failed-corner) !important;
  color: #991b1b !important;
  box-shadow: 0 0 0 1.5px var(--state-failed-corner), 0 3px 8px rgba(239, 68, 68, 0.25) !important;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.dot-aprobada { background: var(--state-aprobada); }
.dot-cursada { background: var(--state-cursada); }
.dot-en-curso { background: var(--state-en-curso); }
.dot-pendiente { background: #94a3b8; }
.square-fail {
  width: 7px;
  height: 7px;
  background: var(--state-failed-corner);
  border-radius: 1px;
}

/* HUD Actions: Import / Export Notes */
.hud-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 14px;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.hud-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 6px;
  user-select: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.18s cubic-bezier(0.2, 0, 0, 1);
  outline: none;
}

.hud-action-btn:hover {
  background: rgba(255, 255, 255, 0.28);
  border-color: #86efac;
  color: #86efac;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.hud-action-btn:active {
  transform: translateY(0);
}

.hud-action-icon {
  font-size: 0.78rem;
}

/* ==========================================================================
   MAP VIEWPORT: Fits 100% of Subjects on Screen
   ========================================================================== */

.map-viewport {
  flex: 1;
  position: relative;
  overflow-x: hidden;
  overflow-y: hidden;
  display: flex;
  flex-direction: column;
}

:root {
  --ingreso-col-width: 145px;
}

/* Left edge trigger zone: invisible 36px wide strip on the left edge */
.left-edge-trigger {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 36px;
  z-index: 40;
  pointer-events: auto;
}

/* The entire graph canvas moves as a single unified piece */
.graph-canvas {
  width: calc(100% + var(--ingreso-col-width));
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  /* Shifted left so Ingreso is hidden and SEM 01 is flush against the left edge */
  transform: translateX(calc(-1 * var(--ingreso-col-width)));
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

/* When mouse goes to the left edge or canvas is told to show ingreso */
.left-edge-trigger:hover ~ .graph-canvas,
.graph-canvas:has(.col-ingreso-column:hover),
.graph-canvas:has(.col-ingreso-header:hover),
.graph-canvas.show-ingreso {
  transform: translateX(0);
}

/* SVG Connection Lines Overlay */
#connectionsSvg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-width: 1245px;
  height: 100%;
  pointer-events: none;
  z-index: 25;
}

.svg-wire {
  fill: none;
  stroke: rgba(148, 163, 184, 0.35);
  stroke-width: 1.5;
  transition: stroke 0.25s ease, stroke-width 0.25s ease, opacity 0.25s ease;
}

.svg-wire.wire-ancestor {
  stroke: var(--hl-ancestor-wire);
  stroke-width: 2.2;
  opacity: 0.95;
  stroke-dasharray: 4 2;
  animation: flow-back 1.2s linear infinite;
}

.svg-wire.wire-descendant {
  stroke: var(--hl-descendant-wire);
  stroke-width: 2.2;
  opacity: 0.95;
  stroke-dasharray: 4 2;
  animation: flow-forward 1.2s linear infinite;
}

@keyframes flow-forward {
  from { stroke-dashoffset: 12; }
  to { stroke-dashoffset: 0; }
}

@keyframes flow-back {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 12; }
}

/* 11 Columns Timeline Header Bar (Ingreso + 10 Semesters) */
.years-timeline-bar {
  display: grid;
  grid-template-columns: var(--ingreso-col-width) repeat(10, 1fr);
  min-width: 1245px;
  background: var(--top-timeline-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 2px solid var(--top-border-accent, #0b172a);
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.25);
  z-index: 10;
  flex-shrink: 0;
  padding-left: 0;
}

.col-ingreso-header {
  background: #4a0d10 !important;
  border-right: 2px solid rgba(255, 255, 255, 0.2) !important;
}

.semester-col-header {
  padding: 6px 4px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1px;
  transition: background 0.15s ease;
}

.semester-col-header:hover {
  background: rgba(255, 255, 255, 0.1);
}

.semester-col-header:last-child {
  border-right: none;
}

.col-year-tag {
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #93c5fd !important; /* Soft ice-blue - HIGH CONTRAST */
  letter-spacing: 0.06em;
}

.col-sem-num {
  font-weight: 800;
  font-size: 0.72rem;
  color: #ffffff !important; /* Pure white - MAXIMUM CONTRAST */
  letter-spacing: 0.03em;
}

/* 11 Columns Matrix Grid (Fits 100vh) */
.matrix-container {
  flex: 1;
  display: grid;
  grid-template-columns: var(--ingreso-col-width) repeat(10, 1fr);
  min-width: 1245px;
  height: 100%;
  padding: 6px 4px;
  position: relative;
  z-index: 6;
}

.col-ingreso-column {
  background: rgba(220, 235, 226, 0.25);
  border-right: 2px solid #cbd7cf !important;
}

.sem-column {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  padding: 4px 5px;
  border-right: 1px dashed rgba(184, 176, 160, 0.5);
  position: relative;
  gap: 6px;
}

.sem-column:last-child {
  border-right: none;
}

.sem-column {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  padding: 4px 5px;
  border-right: 1px dashed rgba(184, 176, 160, 0.5);
  position: relative;
  gap: 6px;
}

.sem-column:last-child {
  border-right: none;
}

/* ==========================================================================
   SUBJECT NODE CARD
   ========================================================================== */

.subject-node {
  background: var(--bg-node);
  border: 1px solid var(--border-node);
  border-radius: 6px;
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  user-select: none;
  min-height: 56px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1), 
              border-color 0.2s ease, 
              box-shadow 0.2s ease, 
              opacity 0.2s ease,
              background-color 0.2s ease;
}

/* Red corner indicator for previous fail / recursa */
.subject-node[data-failed="true"]::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 10px solid var(--state-failed-corner);
  border-left: 10px solid transparent;
  border-top-right-radius: 5px;
  z-index: 3;
}

/* 4 States Styling in Light Mode - Vibrant Normal View */
.subject-node[data-status="aprobada"] {
  border-color: #a7f3d0;
  border-left: 4px solid var(--state-aprobada);
  background: #f4fbf6;
  box-shadow: 0 1px 3px rgba(6, 95, 70, 0.08);
}

.subject-node[data-status="cursada_aprobada"] {
  border-color: #bae6fd;
  border-left: 4px solid var(--state-cursada);
  background: #f2f9ff;
  box-shadow: 0 1px 3px rgba(2, 132, 199, 0.08);
}

.subject-node[data-status="en_curso"] {
  border-color: #fde68a;
  border-left: 4px solid var(--state-en-curso);
  background: #fffdf2;
  box-shadow: 0 1px 3px rgba(217, 119, 6, 0.08);
}

.subject-node[data-status="pendiente"] {
  border-color: var(--state-pendiente-border);
  border-left: 4px solid #94a3b8;
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

/* Recursa: previous fail on pending subject gets red accent */
.subject-node[data-status="pendiente"][data-failed="true"] {
  border-color: #fca5a5;
  border-left: 4px solid var(--state-failed-corner);
  background: #fffafa;
  box-shadow: 0 1px 3px rgba(220, 38, 38, 0.08);
}

/* Node Top: Code & Grade */
.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
}

.node-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text-mono);
}

.node-grade-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 5px;
  border-radius: 4px;
  line-height: 1.1;
}

.node-grade-tag.grade-aprobada {
  color: #065f46;
  background: #dcfce7;
  border: 1px solid #bbf7d0;
}

.node-grade-tag.grade-en-curso {
  font-size: 0.54rem;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fde68a;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.node-grade-tag.grade-cursada {
  font-size: 0.54rem;
  color: #0369a1;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.node-name {
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-main);
  margin: 2px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.6rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.materials-indicator {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  color: #475569;
  font-weight: 600;
}

/* ==========================================================================
   HOVER & TRANSITIVE PATH HIGHLIGHTING (De principio a fin)
   ========================================================================== */

/* The hovered / selected subject - Highlights in its own academic state color */
.subject-node.is-hovered {
  transform: scale(1.08);
  z-index: 50 !important;
  opacity: 1 !important;
  filter: none !important;
}

.subject-node.is-hovered .node-name {
  -webkit-line-clamp: unset;
  color: var(--text-main);
  font-weight: 700;
}

/* Hovered state: Aprobada */
.subject-node.is-hovered[data-status="aprobada"] {
  border-color: var(--state-aprobada-border) !important;
  border-left: 5px solid var(--state-aprobada) !important;
  background: #f0fdf4 !important;
  box-shadow: 0 0 0 2px var(--state-aprobada), 0 10px 25px rgba(16, 185, 129, 0.35) !important;
}

/* Hovered state: En Curso */
.subject-node.is-hovered[data-status="en_curso"] {
  border-color: var(--state-en-curso-border) !important;
  border-left: 5px solid var(--state-en-curso) !important;
  background: #fffbeb !important;
  box-shadow: 0 0 0 2px var(--state-en-curso), 0 10px 25px rgba(245, 158, 11, 0.35) !important;
}

/* Hovered state: Cursada Aprobada (Regular) */
.subject-node.is-hovered[data-status="cursada_aprobada"] {
  border-color: var(--state-cursada-border) !important;
  border-left: 5px solid var(--state-cursada) !important;
  background: #f0f9ff !important;
  box-shadow: 0 0 0 2px var(--state-cursada), 0 10px 25px rgba(2, 132, 199, 0.35) !important;
}

/* Hovered state: Pendiente */
.subject-node.is-hovered[data-status="pendiente"] {
  border-color: #94a3b8 !important;
  border-left: 5px solid #64748b !important;
  background: #ffffff !important;
  box-shadow: 0 0 0 2px #64748b, 0 10px 25px rgba(100, 116, 139, 0.25) !important;
}

/* Hovered state: Recursa / Desaprobada previa */
.subject-node.is-hovered[data-status="pendiente"][data-failed="true"] {
  border-color: #f87171 !important;
  border-left: 5px solid var(--state-failed-corner) !important;
  background: #fef2f2 !important;
  box-shadow: 0 0 0 2px var(--state-failed-corner), 0 10px 25px rgba(220, 38, 38, 0.35) !important;
}

/* Base for path nodes (correlativas anteriores y posteriores) */
.matrix-container.has-active-path .subject-node.is-ancestor,
.matrix-container.has-active-path .subject-node.is-descendant {
  opacity: 1 !important;
  filter: none !important;
  z-index: 30 !important;
  border-radius: 6px;
  min-height: 48px;
  padding: 5px 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: scale(0.98);
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
}

/* ==========================================================================
   RESALTE POR ESTADO ACADÉMICO PARA CORRELATIVAS (ANTERIORES Y POSTERIORES)
   ========================================================================== */

/* 1. Aprobada */
.matrix-container.has-active-path .subject-node.is-ancestor[data-status="aprobada"],
.matrix-container.has-active-path .subject-node.is-descendant[data-status="aprobada"] {
  border-color: var(--state-aprobada-border) !important;
  background: #f0fdf4 !important;
  box-shadow: 0 0 0 1.5px var(--state-aprobada), 0 4px 14px rgba(16, 185, 129, 0.28) !important;
}

/* 2. En Curso */
.matrix-container.has-active-path .subject-node.is-ancestor[data-status="en_curso"],
.matrix-container.has-active-path .subject-node.is-descendant[data-status="en_curso"] {
  border-color: var(--state-en-curso-border) !important;
  background: #fffbeb !important;
  box-shadow: 0 0 0 1.5px var(--state-en-curso), 0 4px 14px rgba(245, 158, 11, 0.28) !important;
}

/* 3. Cursada Aprobada (Regular) */
.matrix-container.has-active-path .subject-node.is-ancestor[data-status="cursada_aprobada"],
.matrix-container.has-active-path .subject-node.is-descendant[data-status="cursada_aprobada"] {
  border-color: var(--state-cursada-border) !important;
  background: #f0f9ff !important;
  box-shadow: 0 0 0 1.5px var(--state-cursada), 0 4px 14px rgba(2, 132, 199, 0.28) !important;
}

/* 4. Pendiente */
.matrix-container.has-active-path .subject-node.is-ancestor[data-status="pendiente"],
.matrix-container.has-active-path .subject-node.is-descendant[data-status="pendiente"] {
  border-color: var(--state-pendiente-border) !important;
  background: #ffffff !important;
  box-shadow: 0 0 0 1.5px #94a3b8, 0 3px 10px rgba(100, 116, 139, 0.18) !important;
}

/* 5. Recursa / Desaprobada previa (con estado pendiente) */
.matrix-container.has-active-path .subject-node.is-ancestor[data-status="pendiente"][data-failed="true"],
.matrix-container.has-active-path .subject-node.is-descendant[data-status="pendiente"][data-failed="true"] {
  border-color: #fca5a5 !important;
  background: #fef2f2 !important;
  box-shadow: 0 0 0 1.5px var(--state-failed-corner), 0 4px 14px rgba(220, 38, 38, 0.28) !important;
}

/* Keep node-top (code and grade/status tag) clearly visible */
.matrix-container.has-active-path .subject-node.is-ancestor .node-top,
.matrix-container.has-active-path .subject-node.is-descendant .node-top {
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Subject name inside path nodes */
.matrix-container.has-active-path .subject-node.is-ancestor .node-name,
.matrix-container.has-active-path .subject-node.is-descendant .node-name {
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 3px 0 1px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-main);
}

/* Hide only secondary metadata (hours, material counter, hover extra info) to avoid clutter */
.matrix-container.has-active-path .subject-node.is-ancestor .node-bottom,
.matrix-container.has-active-path .subject-node.is-descendant .node-bottom,
.matrix-container.has-active-path .subject-node.is-ancestor .node-expanded-info,
.matrix-container.has-active-path .subject-node.is-descendant .node-expanded-info {
  display: none !important;
}

/* Fail corner indicator preserved */
.matrix-container.has-active-path .subject-node.is-ancestor[data-failed="true"]::before,
.matrix-container.has-active-path .subject-node.is-descendant[data-failed="true"]::before {
  border-top-width: 9px;
  border-left-width: 9px;
}

/* Unrelated nodes dimming */
.matrix-container.has-active-path .subject-node:not(.is-hovered):not(.is-ancestor):not(.is-descendant) {
  opacity: 0.16;
  filter: grayscale(85%);
}

/* ==========================================================================
   STATE FILTERING: Resaltar grupo y opacar el resto
   ========================================================================== */

.matrix-container.has-state-filter .subject-node {
  transition: opacity 0.22s ease, filter 0.22s ease, transform 0.22s cubic-bezier(0.2, 0, 0, 1), box-shadow 0.22s ease;
}

/* Dim non-matching nodes */
.matrix-container.has-state-filter .subject-node.is-filter-dimmed {
  opacity: 0.14 !important;
  filter: grayscale(90%) !important;
  transform: scale(0.95);
}

/* Highlight matching nodes */
.matrix-container.has-state-filter .subject-node.is-filter-highlighted {
  opacity: 1 !important;
  filter: none !important;
  transform: scale(1.05);
  z-index: 25;
}

.matrix-container.has-state-filter .subject-node.is-filter-highlighted[data-status="aprobada"] {
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25), 0 0 0 1.5px var(--state-aprobada) !important;
}

.matrix-container.has-state-filter .subject-node.is-filter-highlighted[data-status="en_curso"] {
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.25), 0 0 0 1.5px var(--state-en-curso) !important;
}

.matrix-container.has-state-filter .subject-node.is-filter-highlighted[data-status="cursada_aprobada"] {
  box-shadow: 0 6px 16px rgba(2, 132, 199, 0.25), 0 0 0 1.5px var(--state-cursada) !important;
}

.matrix-container.has-state-filter .subject-node.is-filter-highlighted[data-status="pendiente"] {
  box-shadow: 0 6px 16px rgba(100, 116, 139, 0.2), 0 0 0 1.5px #94a3b8 !important;
}

.matrix-container.has-state-filter .subject-node.is-filter-highlighted[data-failed="true"] {
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.3), 0 0 0 1.5px var(--state-failed-corner) !important;
}

/* When tracing an active path, disable filter scaling on path nodes so wires connect cleanly */
.matrix-container.has-active-path.has-state-filter .subject-node.is-filter-highlighted:not(.is-hovered) {
  box-shadow: none !important;
}

/* Hover Expanded Info Box inside hovered node */
.node-expanded-info {
  display: none;
  font-size: 0.65rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  margin-top: 4px;
  padding-top: 4px;
  gap: 2px;
  flex-direction: column;
}

.subject-node.is-hovered .node-expanded-info {
  display: flex;
}

/* ==========================================================================
   ACADEMIC RESOURCE HUB & STUDY PORTAL (DIALOG MODAL)
   ========================================================================== */

dialog.classy-drawer {
  margin: auto;
  border: 1px solid var(--border-subtle, #cbd7cf);
  border-radius: 16px;
  background: #edf3ee;
  color: var(--text-main);
  padding: 0;
  width: 94vw;
  max-width: 1040px;
  max-height: 88vh;
  box-shadow: 0 25px 60px -15px rgba(15, 23, 42, 0.28), 0 4px 16px rgba(0, 0, 0, 0.06);
  outline: none;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

dialog.classy-drawer::backdrop {
  background: rgba(15, 23, 42, 0.32);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

/* Header: Solid Rich Forest Emerald (Homogéneo con el header principal, sin degradé oscuro) */
.drawer-header {
  padding: 18px 28px;
  border-bottom: 1px solid #044e39;
  background: var(--top-header-bg, #065f46);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}

.drawer-header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-meta-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: #93c5fd;
  flex-wrap: wrap;
}

.drawer-code {
  font-weight: 800;
  color: #86efac;
  background: rgba(16, 185, 129, 0.22);
  border: 1px solid rgba(134, 239, 172, 0.35);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

.drawer-dot-sep {
  color: rgba(255, 255, 255, 0.3);
}

#drawerYearSem, #drawerHours {
  color: #cbd5e1;
  font-weight: 500;
}

.drawer-status-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.drawer-status-pill[data-status="en_curso"] {
  background: rgba(245, 158, 11, 0.25);
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.45);
}

.drawer-status-pill[data-status="aprobada"] {
  background: rgba(16, 185, 129, 0.25);
  color: #a7f3d0;
  border-color: rgba(16, 185, 129, 0.45);
}

.drawer-status-pill[data-status="cursada_aprobada"] {
  background: rgba(2, 132, 199, 0.25);
  color: #bae6fd;
  border-color: rgba(2, 132, 199, 0.45);
}

.drawer-status-pill[data-status="pendiente"] {
  background: rgba(148, 163, 184, 0.2);
  color: #cbd5e1;
  border-color: rgba(148, 163, 184, 0.35);
}

.drawer-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  margin: 2px 0 0 0;
  letter-spacing: -0.025em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Drawer Correlativas Banner */
.drawer-correlativas-banner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.74rem;
  line-height: 1.35;
  color: #ecfdf5;
  width: fit-content;
  max-width: 100%;
}

.correlativas-banner-icon {
  font-size: 0.85rem;
}

.correlativas-banner-label {
  font-weight: 700;
  color: #86efac;
  white-space: nowrap;
}

.correlativas-banner-text {
  color: #f0fdf4;
  font-weight: 500;
}

.drawer-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Official Links Strip inside Header */
.official-strip {
  display: flex;
  align-items: center;
  gap: 8px;
}

.official-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #ffffff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.73rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.15s ease;
  backdrop-filter: blur(4px);
  white-space: nowrap;
}

.official-link-btn:hover {
  background: rgba(255, 255, 255, 0.24);
  border-color: #86efac;
  color: #86efac;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.drawer-close {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #ffffff;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.15s ease;
}

.drawer-close:hover {
  background: #dc2626;
  border-color: #ef4444;
  color: #ffffff;
  transform: scale(1.06);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

/* Status & Grade Configuration Strip */
.drawer-status-bar {
  background: #f8fafc;
  border-bottom: 1px solid #dce5df;
  padding: 10px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.status-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.status-bar-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 700;
  color: #334155;
  cursor: pointer;
  user-select: none;
}

.status-bar-icon {
  font-size: 0.85rem;
  color: #059669;
}

.drawer-status-select {
  background: #ffffff;
  border: 1.5px solid #cbd5cf;
  border-radius: 8px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: #0f172a;
  outline: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.drawer-status-select:focus {
  border-color: #059669;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Grade Editor (Promocionada / Aprobada) */
.drawer-grade-editor {
  display: none; /* Toggled dynamically via JS when status is aprobada */
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1.5px solid #a7f3d0;
  border-radius: 8px;
  padding: 3px 10px;
  box-shadow: 0 1px 3px rgba(16, 185, 129, 0.08);
  animation: fadeInEditor 0.2s cubic-bezier(0.2, 0, 0, 1);
}

@keyframes fadeInEditor {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.grade-editor-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: #065f46;
  user-select: none;
}

.drawer-grade-input {
  width: 58px;
  border: 1px solid #cbd5cf;
  border-radius: 4px;
  padding: 4px 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 800;
  color: #065f46;
  text-align: center;
  outline: none;
  background: #f0fdf4;
  transition: all 0.15s ease;
}

.drawer-grade-input:focus {
  border-color: #059669;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  background: #ffffff;
}

.grade-editor-unit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  color: #64748b;
  user-select: none;
}

/* LocalStorage Saved Badge */
.status-bar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-saved-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  font-weight: 700;
  color: #059669;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 4px 10px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.02em;
  transition: all 0.25s ease;
  user-select: none;
}

.status-saved-pill.just-saved {
  background: #d1fae5;
  border-color: #34d399;
  transform: scale(1.05);
}

.saved-dot {
  font-size: 0.6rem;
  color: #10b981;
}

.drawer-export-mini-btn {
  background: #ffffff;
  border: 1px solid #cbd5cf;
  border-radius: 8px;
  color: #334155;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  font-weight: 700;
  padding: 4px 9px;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.drawer-export-mini-btn:hover {
  background: #ecfdf5;
  color: #065f46;
  border-color: #34d399;
  transform: translateY(-1px);
}

/* Toolbar: Tabs & Real-time Search Filter */
.drawer-toolbar {
  background: #ffffff;
  border-bottom: 1px solid #dce5df;
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
  z-index: 10;
}

.drawer-tabs-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0;
  scrollbar-width: none;
}

.drawer-tabs-wrapper::-webkit-scrollbar {
  display: none;
}

.drawer-tab-chip {
  background: #f1f5f3;
  color: #334155;
  border: 1px solid #cbd5cf;
  border-radius: 20px;
  padding: 6px 13px;
  font-size: 0.76rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  white-space: nowrap;
  user-select: none;
}

.drawer-tab-chip:hover {
  background: #e2ece6;
  color: #064e3b;
  border-color: #94a39b;
}

.drawer-tab-chip.is-active {
  background: #065f46;
  color: #ffffff;
  border-color: #044e39;
  box-shadow: 0 2px 8px rgba(6, 95, 70, 0.28);
  font-weight: 700;
}

.tab-chip-icon {
  font-size: 0.95rem;
}

.tab-chip-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: 10px;
  background: #cbd5e1;
  color: #1e293b;
}

.drawer-tab-chip.is-active .tab-chip-badge {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

/* Search Box */
.drawer-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.drawer-search-icon {
  position: absolute;
  left: 10px;
  font-size: 0.75rem;
  pointer-events: none;
  opacity: 0.5;
}

.drawer-search-input {
  background: #f8fafc;
  border: 1px solid #cbd5cf;
  border-radius: 20px;
  padding: 6px 14px 6px 30px;
  font-size: 0.76rem;
  font-family: inherit;
  color: #0f172a;
  width: 190px;
  outline: none;
  transition: all 0.2s ease;
}

.drawer-search-input:focus {
  border-color: #059669;
  width: 230px;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
  background: #ffffff;
}

/* Modal Body: Architectural Soft Sage Canvas (NOT sterile white!) */
.drawer-body {
  padding: 22px 28px 26px 28px;
  overflow-y: auto;
  background: #edf3ee;
  background-image: radial-gradient(#cad7cf 1px, transparent 1px);
  background-size: 16px 16px;
  flex: 1 1 auto;
  min-height: 0;
}

/* Resources Grid: Clean, direct grid without nested accordions */
.drawer-resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  align-items: stretch;
}

/* Modern File / Resource Card */
.drawer-material-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #ffffff;
  border: 1px solid #d4e0d8;
  border-radius: 12px;
  padding: 16px 18px;
  min-height: 175px;
  transition: all 0.22s cubic-bezier(0.2, 0, 0, 1);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
}

.drawer-material-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(6, 78, 59, 0.12);
  border-color: #86efac;
}

/* File Type Color Styling */
.drawer-material-card.mat-type-pdf {
  border-left: 4px solid #ef4444;
}

.drawer-material-card.mat-type-pdf .mat-icon-badge {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #dc2626;
}

.drawer-material-card.mat-type-pdf .mat-type-pill {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.drawer-material-card.mat-type-html {
  border-left: 4px solid #10b981;
}

.drawer-material-card.mat-type-html .mat-icon-badge {
  background: #dcfce7;
  border: 1px solid #bbf7d0;
  color: #059669;
}

.drawer-material-card.mat-type-html .mat-type-pill {
  background: #f0fdf4;
  color: #059669;
  border: 1px solid #bbf7d0;
}

.drawer-material-card.mat-type-doc,
.drawer-material-card.mat-type-docx {
  border-left: 4px solid #2563eb;
}

.drawer-material-card.mat-type-doc .mat-icon-badge,
.drawer-material-card.mat-type-docx .mat-icon-badge {
  background: #dbeafe;
  border: 1px solid #bfdbfe;
  color: #2563eb;
}

.drawer-material-card.mat-type-doc .mat-type-pill,
.drawer-material-card.mat-type-docx .mat-type-pill {
  background: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.drawer-material-card.mat-type-ppt,
.drawer-material-card.mat-type-pptx {
  border-left: 4px solid #ea580c;
}

.drawer-material-card.mat-type-ppt .mat-icon-badge,
.drawer-material-card.mat-type-pptx .mat-icon-badge {
  background: #ffedd5;
  border: 1px solid #fed7aa;
  color: #ea580c;
}

.drawer-material-card.mat-type-ppt .mat-type-pill,
.drawer-material-card.mat-type-pptx .mat-type-pill {
  background: #fff7ed;
  color: #ea580c;
  border: 1px solid #fed7aa;
}

.drawer-material-card.mat-type-video {
  border-left: 4px solid #8b5cf6;
}

.drawer-material-card.mat-type-video .mat-icon-badge {
  background: #ede9fe;
  border: 1px solid #ddd6fe;
  color: #7c3aed;
}

.drawer-material-card.mat-type-video .mat-type-pill {
  background: #f5f3ff;
  color: #7c3aed;
  border: 1px solid #ddd6fe;
}

/* Card Header */
.mat-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.mat-card-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mat-icon-badge {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  border: 1px solid transparent;
}

.mat-cat-pill {
  font-size: 0.68rem;
  font-weight: 700;
  color: #475569;
  background: #f1f5f3;
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid #dce5df;
}

.mat-type-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid transparent;
  letter-spacing: 0.04em;
}

/* Card Body */
.mat-card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.mat-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mat-desc {
  font-size: 0.74rem;
  color: #64748b;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Card Footer & Button */
.mat-card-footer {
  margin-top: 14px;
}

.mat-open-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #065f46;
  color: #ffffff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: 7px;
  text-decoration: none;
  transition: all 0.15s ease;
  box-shadow: 0 1px 3px rgba(6, 95, 70, 0.2);
}

.mat-open-btn:hover {
  background: #044e39;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(6, 95, 70, 0.35);
}

.mat-open-arrow {
  font-size: 0.85rem;
  transition: transform 0.15s ease;
}

.mat-open-btn:hover .mat-open-arrow {
  transform: translate(2px, -2px);
}

/* Empty State Card */
.drawer-empty-state {
  grid-column: 1 / -1;
  padding: 45px 20px;
  text-align: center;
  background: #ffffff;
  border: 1px dashed #cbd5cf;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.empty-icon {
  font-size: 2.2rem;
  margin-bottom: 2px;
}

.empty-title {
  font-size: 1rem;
  font-weight: 800;
  color: #0f172a;
}

.empty-desc {
  font-size: 0.78rem;
  color: #64748b;
  max-width: 420px;
  line-height: 1.45;
}

/* Local Folder path */
.folder-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: #f1f5f9;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.copy-btn {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.68rem;
  font-weight: 600;
}

.copy-btn:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

/* Toast */
.toast-notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #0f172a;
  color: #ffffff;
  border: 1px solid var(--border-subtle);
  padding: 8px 14px;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.2s ease;
  pointer-events: none;
}

.toast-notice.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   OPTATIVAS SELECTOR MODAL & MATRIX NODES
   ========================================================================== */

/* Drawer Change Optativa Button */
.drawer-change-optativa-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: 8px;
  background: rgba(147, 197, 253, 0.22);
  border: 1px solid #93c5fd;
  color: #ffffff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 0 10px rgba(147, 197, 253, 0.25);
  white-space: nowrap;
}

.drawer-change-optativa-btn:hover {
  background: #93c5fd;
  color: #0f172a;
  box-shadow: 0 0 14px rgba(147, 197, 253, 0.5);
  transform: translateY(-1px);
}

/* Node Optativa Slot Unassigned */
.subject-node.node-optativa-slot.is-unassigned {
  border: 1.5px dashed #94a3b8 !important;
  background: #f8fafc !important;
  cursor: pointer;
}

.subject-node.node-optativa-slot.is-unassigned:hover {
  border-color: #059669 !important;
  background: #f0fdf4 !important;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2), 0 8px 20px rgba(6, 78, 59, 0.15) !important;
  transform: translateY(-2px);
}

.grade-optativa-choose {
  background: #ecfdf5 !important;
  color: #059669 !important;
  border: 1px solid #a7f3d0 !important;
  font-weight: 800;
  letter-spacing: 0.04em;
  animation: pulseChoose 2.4s infinite ease-in-out;
}

@keyframes pulseChoose {
  0%, 100% { opacity: 0.88; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

.optativa-type-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  font-weight: 700;
  color: #059669;
  background: #ecfdf5;
  border: 1px solid #d1fae5;
  padding: 1px 4px;
  border-radius: 3px;
}

dialog:not([open]) {
  display: none !important;
}

/* Optativas Modal Dialog */
.optativas-modal {
  width: min(940px, 94vw);
  max-height: 88vh;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 25px 75px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

dialog[open].optativas-modal {
  display: flex !important;
}

.optativas-modal::backdrop {
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
}

.optativas-modal-header {
  background: var(--top-header-bg);
  padding: 18px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.optativas-modal-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: #fed7aa;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.optativas-modal-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 3px 0 2px 0;
  color: #ffffff;
}

.optativas-modal-subtitle {
  font-size: 0.8rem;
  color: #dbeafe;
  margin: 0;
}

.optativas-modal-controls {
  padding: 14px 24px;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.optativas-search-box {
  flex: 1 1 240px;
}

.optativas-filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.opt-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 6px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s ease;
}

.opt-chip:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
}

.opt-chip.is-active {
  background: #065f46;
  color: #ffffff;
  border-color: #065f46;
}

.optativas-modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1 1 auto;
  background: #edf3ee;
  background-image: radial-gradient(#cad7cf 1px, transparent 1px);
  background-size: 16px 16px;
}

.optativas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 14px;
}

.optativa-card {
  background: #ffffff;
  border: 1px solid #cbd5cf;
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.optativa-card:hover {
  transform: translateY(-2px);
  border-color: #10b981;
  box-shadow: 0 6px 18px rgba(6, 78, 59, 0.12);
}

.optativa-card.is-selected-here {
  border-color: #10b981;
  background: #f0fdf4;
  box-shadow: 0 0 0 2px #10b981;
}

.optativa-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.opt-tipo-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
}

.opt-tipo-badge.tipo-a {
  background: #dcfce7;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.opt-tipo-badge.tipo-b {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

.opt-code-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 800;
  color: #0f172a;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  padding: 2px 6px;
  border-radius: 4px;
}

.opt-sem-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: #64748b;
}

.optativa-card-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.3;
}

.optativa-card-prof {
  font-size: 0.75rem;
  color: #475569;
}

.optativa-card-correlativas {
  font-size: 0.7rem;
  color: #64748b;
  background: #f8fafc;
  padding: 6px 9px;
  border-radius: 6px;
  border: 1px solid #e2e8f0;
  line-height: 1.35;
}

.optativa-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px solid #f1f5f9;
}

.opt-quick-links {
  display: flex;
  gap: 6px;
}

.opt-link-mini {
  font-size: 0.68rem;
  font-weight: 600;
  color: #059669;
  text-decoration: none;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.opt-link-mini:hover {
  background: #059669;
  color: #ffffff;
}

.btn-select-optativa {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid #059669;
  background: #059669;
  color: #ffffff;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-select-optativa:hover {
  background: #047857;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.35);
}

.btn-select-optativa.is-selected {
  background: #ecfdf5;
  color: #059669;
  border-color: #10b981;
  pointer-events: none;
}

.btn-select-optativa.is-disabled {
  background: #f1f5f9;
  color: #94a3b8;
  border-color: #cbd5e1;
  cursor: not-allowed;
}

.optativas-modal-footer {
  padding: 12px 24px;
  background: #ffffff;
  border-top: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.btn-clear-optativa {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-clear-optativa:hover {
  background: #fee2e2;
  border-color: #f87171;
}

.optativas-footer-hint {
  font-size: 0.7rem;
  color: #64748b;
}