/* DESIGN SYSTEM & GLOBAL STYLES */
:root {
  /* Fonts */
  --font-title: 'Outfit', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Borders & Shadows */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Dark Mode Palette (Default) */
  --bg-app: #080d1a;
  --bg-surface: #101626;
  --bg-surface-hover: #172036;
  --bg-card: #12192c;
  
  --border-color: #1f2c4a;
  --border-color-hover: #314470;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-primary: #ff7a30; /* Soft Orange base */
  --color-primary-glow: rgba(255, 122, 48, 0.15);
  
  /* State Colors - Dark Mode */
  --state-locked-opacity: 0.45;
  
  --state-available-bg: rgba(255, 122, 48, 0.08);
  --state-available-border: #ff7a30;
  --state-available-text: #ff985f;
  --state-available-glow: rgba(255, 122, 48, 0.35);

  --state-regular-bg: #ff6000;
  --state-regular-border: #e65600;
  --state-regular-text: #ffffff;
  --state-regular-glow: rgba(255, 96, 0, 0.4);

  --state-approved-bg: rgba(16, 185, 129, 0.1);
  --state-approved-border: #10b981;
  --state-approved-text: #34d399;
  --state-approved-glow: rgba(16, 185, 129, 0.35);
  
  --state-intermediate-star: #fbbf24;
  
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-bg: rgba(239, 68, 68, 0.1);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 15px var(--state-available-glow);
  
  /* SVG Connection Colors */
  --path-color-default: #2a3a5e;
  --path-color-active: #3b82f6;
  --path-color-dependency: #f59e0b;
  --path-color-dependant: #10b981;
}

/* Light Mode Overrides */
.light-mode {
  --bg-app: #f4f6fa;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f8fafc;
  --bg-card: #f8fafc;
  
  --border-color: #e2e8f0;
  --border-color-hover: #cbd5e1;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --color-primary: #ea580c;
  --color-primary-glow: rgba(234, 88, 12, 0.08);
  
  --state-available-bg: #fff7ed;
  --state-available-border: #ea580c;
  --state-available-text: #ea580c;
  --state-available-glow: rgba(234, 88, 12, 0.2);

  --state-regular-bg: #ea580c;
  --state-regular-border: #c2410c;
  --state-regular-text: #ffffff;
  --state-regular-glow: rgba(234, 88, 12, 0.3);

  --state-approved-bg: #ecfdf5;
  --state-approved-border: #059669;
  --state-approved-text: #047857;
  --state-approved-glow: rgba(5, 150, 105, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
  
  --path-color-default: #cbd5e1;
}

/* RESET & BASE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* APP CONTAINER */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  padding: 24px;
  gap: 24px;
}

/* HEADER SECTION */
.app-header {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.title-section {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-wrapper {
  background: linear-gradient(135deg, #ff7a30, #ff4500);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(255, 122, 48, 0.3);
}

.logo-icon {
  color: white;
  width: 26px;
  height: 26px;
}

.title-section h1 {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.title-section .subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.action-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-icon:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: #e65c10;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-color-hover);
}

.btn-danger {
  background-color: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.2);
  color: var(--danger-color);
}

.btn-danger:hover {
  background-color: var(--danger-color);
  color: white;
  transform: translateY(-1px);
}

/* Theme Icons Toggle styling */
.icon-sun { display: none; }
.light-mode .icon-sun { display: block; }
.light-mode .icon-moon { display: none; }

/* STATISTICS DASHBOARD */
.stats-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

@media (min-width: 1200px) {
  .stats-dashboard {
    grid-template-columns: 2fr 2fr 1fr 1fr 1fr;
  }
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.stat-card.progress-card {
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 10px;
}

.stat-info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.progress-bar-container {
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #ff7a30, #ff4500);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-card.intermediate .progress-bar {
  background: linear-gradient(90deg, #10b981, #059669);
}

.stat-subtext {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.stat-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon-wrapper.aprobadas {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.stat-icon-wrapper.regularizadas {
  background-color: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.stat-icon-wrapper.promedio {
  background-color: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.stat-details {
  display: flex;
  flex-direction: column;
}

/* CONTROLS SECTION */
.controls-section {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 250px;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
}

.search-box input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.filter-group label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.select-wrapper {
  position: relative;
}

.filter-group select {
  padding: 12px 36px 12px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  appearance: none;
  transition: all var(--transition-fast);
}

.filter-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.select-wrapper::after {
  content: '';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-top-color: var(--text-muted);
  pointer-events: none;
}

/* Switches */
.checkbox-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.switch-label {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch-label input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.switch-label input:checked + .switch-slider {
  background-color: var(--color-primary);
}

.switch-label input:checked + .switch-slider:before {
  transform: translateX(20px);
}

.checkbox-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  user-select: none;
}

/* ACADEMIC MAP SECTION */
.academic-map-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

/* Legend Bar */
.legend-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-color {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid transparent;
}

.legend-color.locked {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  opacity: var(--state-locked-opacity);
}

.legend-color.available {
  background-color: var(--state-available-bg);
  border-color: var(--state-available-border);
}

.legend-color.regular {
  background-color: var(--state-regular-bg);
  border-color: var(--state-regular-border);
}

.legend-color.approved {
  background-color: var(--state-approved-bg);
  border-color: var(--state-approved-border);
}

.legend-badge-star {
  color: var(--state-intermediate-star);
  font-weight: bold;
  font-size: 1.3rem;
  line-height: 1;
}

.legend-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Scroll Containers */
.map-container-outer {
  width: 100%;
  overflow-x: auto;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.map-container-outer::-webkit-scrollbar {
  height: 8px;
}

.map-container-outer::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: var(--radius-full);
}

.map-container {
  display: flex;
  gap: 24px;
  padding: 16px 8px;
  min-width: 1600px;
  position: relative; /* So connection SVG coordinate calc works absolute */
}

/* SVG Connection Lines layer */
.connections-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Year Columns */
.year-column {
  flex: 1;
  min-width: 300px;
  max-width: 350px;
  background-color: rgba(255, 255, 255, 0.015);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-color);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  z-index: 2; /* Sits above SVG but allows pointer events on cards */
}

.light-mode .year-column {
  background-color: rgba(0, 0, 0, 0.005);
}

.year-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.year-num {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.year-name {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-top: 4px;
}

.subjects-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Special Requirements (PSE Box) */
.special-requirement-box {
  background-color: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pse-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #60a5fa;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pse-checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  user-select: none;
}

.pse-checkbox-wrapper input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.pse-checkbox-custom {
  position: relative;
  height: 18px;
  width: 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.pse-checkbox-wrapper:hover input ~ .pse-checkbox-custom {
  border-color: #3b82f6;
}

.pse-checkbox-wrapper input:checked ~ .pse-checkbox-custom {
  background-color: #3b82f6;
  border-color: #2563eb;
}

.pse-checkbox-custom:after {
  content: "";
  position: absolute;
  display: none;
  left: 6px;
  top: 2px;
  width: 4px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.pse-checkbox-wrapper input:checked ~ .pse-checkbox-custom:after {
  display: block;
}

/* SUBJECT CARD */
.subject-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  cursor: not-allowed;
  user-select: none;
  transition: 
    opacity var(--transition-normal), 
    border-color var(--transition-normal), 
    background-color var(--transition-normal), 
    transform var(--transition-normal), 
    box-shadow var(--transition-normal);
}

/* States Styling */
.subject-card.state-locked {
  opacity: var(--state-locked-opacity);
}

.subject-card.state-available {
  cursor: pointer;
  background-color: var(--state-available-bg);
  border-color: var(--state-available-border);
  box-shadow: 0 4px 12px rgba(255, 122, 48, 0.05);
}

.subject-card.state-available:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 
    0 8px 24px rgba(255, 122, 48, 0.12),
    0 0 12px var(--state-available-glow);
  border-color: var(--state-available-border);
}

.subject-card.state-regular {
  cursor: pointer;
  background-color: var(--state-regular-bg);
  border-color: var(--state-regular-border);
  color: var(--state-regular-text);
  box-shadow: 0 4px 12px rgba(255, 96, 0, 0.15);
}

.subject-card.state-regular:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 
    0 8px 24px rgba(255, 96, 0, 0.25),
    0 0 15px var(--state-regular-glow);
}

.subject-card.state-approved {
  cursor: pointer;
  background-color: var(--state-approved-bg);
  border-color: var(--state-approved-border);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.05);
}

.subject-card.state-approved:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 
    0 8px 24px rgba(16, 185, 129, 0.15),
    0 0 12px var(--state-approved-glow);
}

/* Card Internals */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.subject-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.light-mode .subject-num {
  background-color: rgba(0, 0, 0, 0.04);
}

.subject-card.state-available .subject-num {
  color: var(--state-available-text);
  background-color: rgba(255, 122, 48, 0.1);
}

.subject-card.state-regular .subject-num {
  color: rgba(255, 255, 255, 0.9);
  background-color: rgba(0, 0, 0, 0.15);
}

.subject-card.state-approved .subject-num {
  color: var(--state-approved-text);
  background-color: rgba(16, 185, 129, 0.15);
}

.badge-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 20px; /* Leave space for clear button */
}

.star-badge {
  color: var(--state-intermediate-star);
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1;
  cursor: help;
}

.status-text-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 1px 5px;
  border-radius: 3px;
}

.subject-card.state-regular .status-text-badge {
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.subject-card.state-approved .status-text-badge {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--state-approved-text);
}

.subject-title {
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-right: 14px;
}

.subject-card.state-regular .subject-title {
  color: white;
}

/* Card details (Grade showing) */
.subject-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  margin-top: auto;
  padding-top: 4px;
}

.txt-grade-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.subject-card.state-regular .txt-grade-label,
.subject-card.state-regular .txt-grade-val {
  color: rgba(255, 255, 255, 0.85);
}

.txt-grade-val {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.85rem;
}

/* Card Clear Button (X) */
.card-clear-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.15);
  border: none;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: bold;
  cursor: pointer;
  opacity: 0;
  z-index: 10;
  transition: all var(--transition-fast);
}

.light-mode .card-clear-btn {
  background-color: rgba(0, 0, 0, 0.05);
}

.subject-card:hover .card-clear-btn {
  opacity: 1;
}

.card-clear-btn:hover {
  background-color: var(--danger-color);
  color: white;
  transform: scale(1.15);
}

.subject-card.state-regular .card-clear-btn {
  color: rgba(255, 255, 255, 0.7);
  background-color: rgba(0, 0, 0, 0.2);
}

.subject-card.state-regular .card-clear-btn:hover {
  background-color: var(--danger-color);
  color: white;
}

/* Highlight styling when drawing interactive paths */
.subject-card.highlight-hover {
  border-color: var(--path-color-active);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
}

.subject-card.highlight-dependency {
  border-color: var(--path-color-dependency);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.3);
}

.subject-card.highlight-dependant {
  border-color: var(--path-color-dependant);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

/* Filter Dimming: hide subjects not matching the current filter completely */
.subject-card.filter-dimmed {
  opacity: 0.12 !important;
  pointer-events: none !important;
}

/* Period Filter Dimming: de-emphasize subjects outside selected cuatrimestre */
.subject-card.period-dimmed {
  opacity: 0.22 !important;
  filter: grayscale(70%);
  transition: opacity var(--transition-normal), filter var(--transition-normal);
}

.subject-card.period-dimmed:hover {
  opacity: 0.8 !important;
  filter: grayscale(0%);
}

.cuatrimestre-badge {
  font-size: 0.6rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--primary-color);
  border: 1px solid rgba(59, 130, 246, 0.3);
  line-height: 1;
}

.subject-card.state-regular .cuatrimestre-badge {
  background-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.subject-card.state-approved .cuatrimestre-badge {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--state-approved-text);
  border-color: rgba(16, 185, 129, 0.3);
}

/* SVG PATH LINES */
.connection-path {
  fill: none;
  stroke: var(--path-color-default);
  stroke-width: 1.5;
  transition: stroke var(--transition-fast), stroke-width var(--transition-fast);
  stroke-linecap: round;
}

.connection-path.path-active {
  stroke-width: 2.5;
}

.connection-path.path-dependency {
  stroke: var(--path-color-dependency);
  stroke-dasharray: 4 2;
  stroke-width: 2.5;
}

.connection-path.path-dependant {
  stroke: var(--path-color-dependant);
  stroke-width: 2.5;
}

/* FOOTER SECTION */
.app-footer {
  text-align: center;
  padding: 16px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
}

/* MODAL STYLES */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.9);
  transition: transform var(--transition-normal);
  overflow: hidden;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.15rem;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.subject-info-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius-md);
}

.subject-number-badge {
  background-color: var(--border-color);
  color: var(--text-secondary);
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.subject-name-text {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input {
  padding: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.input-help-text {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.modal-info-alert {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.alert-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.indicator.approved {
  background-color: var(--state-approved-border);
}

.indicator.regular {
  background-color: var(--state-regular-border);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 8px;
}

/* Confirm modal specifics */
.modal-confirm {
  max-width: 400px;
}

.warning-text {
  color: var(--danger-color);
  font-weight: 600;
  font-size: 0.9rem;
}

/* TOAST NOTIFICATIONS */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 10000;
  pointer-events: none;
  transform: translateY(100px) scale(0.9);
  opacity: 0;
  transition: all var(--transition-normal);
  max-width: 450px;
}

.toast-notification.active {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: all;
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast-message {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-primary);
}

.toast-info {
  border-left: 4px solid #3b82f6;
}
.toast-info .toast-icon {
  color: #3b82f6;
}

.toast-success {
  border-left: 4px solid #10b981;
}
.toast-success .toast-icon {
  color: #10b981;
}

.toast-error {
  border-left: 4px solid #ef4444;
}
.toast-error .toast-icon {
  color: #ef4444;
}