/* styles.css */

/* Design Tokens & Theme Variables */
:root {
  --bg-primary: #0a192f;
  --bg-secondary: #172a45;
  --bg-card: rgba(23, 42, 69, 0.7);
  --text-primary: #e6f1ff;
  --text-secondary: #8892b0;
  --text-muted: #606b85;
  --accent-cyan: #64ffda;
  --accent-blue: #00b4d8;
  --accent-orange: #ff7b00;
  --color-danger: #ff4c29;
  --color-danger-bg: rgba(255, 76, 41, 0.1);
  --color-success: #4caf50;
  --color-success-bg: rgba(76, 175, 80, 0.1);
  --border-color: rgba(100, 255, 218, 0.15);
  --font-sans: 'Inter', "Microsoft JhengHei", -apple-system, sans-serif;
  --shadow-lg: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
  --border-radius: 12px;
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  padding-bottom: 2rem;
}

.app-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.5rem;
  flex-grow: 1;
}

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Header Styles */
.app-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.logo-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.logo-area .icon {
  font-size: 2.2rem;
  filter: drop-shadow(0 0 10px var(--accent-blue));
}

.app-header h1 {
  font-size: 1.8rem;
  background: linear-gradient(135deg, #fff 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* Tab Navigation Styles */
.tab-navigation {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tab-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.8rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(100, 255, 218, 0.1);
}

.tab-btn.active {
  color: var(--bg-primary);
  background-color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 0 15px rgba(100, 255, 218, 0.3);
}

/* Tab Panels */
.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active-panel {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Grid Layout for Interactive Panels */
.interactive-grid, .animation-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 900px) {
  .interactive-grid, .animation-grid {
    grid-template-columns: 1fr;
  }
}

/* Viewport Card Styling (The Screen hosting SVG/Canvas) */
.viewport-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.viewport-header {
  background-color: rgba(10, 25, 47, 0.6);
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.status-dot.green {
  background-color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.help-text {
  margin-left: auto;
  color: var(--accent-cyan);
  font-size: 0.8rem;
  opacity: 0.8;
}

.svg-wrapper, .canvas-wrapper {
  padding: 1.5rem;
  background-color: #0b132b;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}

.viewport-legend {
  padding: 0.75rem 1.25rem;
  background-color: rgba(10, 25, 47, 0.4);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.8rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.legend-color.hull-color { background: #2c3e50; border: 1px solid #4a5568; }
.legend-color.eq-color { background: #1a202c; border: 1px solid var(--accent-cyan); }
.legend-color.line-color { background: #4a5568; height: 3px; }
.legend-color.snapback-color { background: var(--color-danger-bg); border: 1px dashed var(--color-danger); }

/* SVG Styles */
#mooring-svg {
  display: block;
}

/* SVG Cargo Hatch */
.cargo-hatch {
  transition: fill 0.3s;
}

/* Equipment Hotspots Styling */
.hotspot {
  cursor: pointer;
}

.hotspot-trigger {
  fill: rgba(100, 255, 218, 0);
  stroke: rgba(100, 255, 218, 0.3);
  stroke-width: 1.5;
  transition: var(--transition-smooth);
}

.hotspot:hover .hotspot-trigger {
  fill: rgba(100, 255, 218, 0.12);
  stroke: var(--accent-cyan);
  stroke-width: 2;
  filter: drop-shadow(0 0 3px var(--accent-cyan));
}

.hotspot.active .hotspot-trigger {
  fill: rgba(100, 255, 218, 0.25);
  stroke: var(--accent-cyan);
  stroke-width: 2.5;
  filter: drop-shadow(0 0 6px var(--accent-cyan));
}

/* Mooring Line Styling */
.mooring-line {
  stroke: #4a5568;
  stroke-width: 3.5px;
  stroke-linecap: round;
  fill: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.mooring-line:hover {
  stroke: var(--accent-blue);
  stroke-width: 5px;
}

.mooring-line.active {
  stroke: var(--accent-blue);
  stroke-width: 5px;
  filter: drop-shadow(0 0 6px var(--accent-blue));
}

/* Mooring Line with specific styling if active */
.mooring-line.active.spring-line {
  stroke: var(--accent-orange);
  filter: drop-shadow(0 0 6px var(--accent-orange));
}

/* Force Arrows (Vectors) */
.force-arrow {
  fill: none;
  stroke-width: 3.5px;
  stroke-dasharray: 6, 4;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.force-arrow.active {
  opacity: 1;
  animation: run-dash 1s infinite linear;
}

@keyframes run-dash {
  to {
    stroke-dashoffset: -20;
  }
}

/* Snapback Zones Styling */
.snapback-zone {
  fill: rgba(255, 76, 41, 0.03);
  stroke: rgba(255, 76, 41, 0.15);
  stroke-width: 1.5;
  stroke-dasharray: 5, 3;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.snapback-zone:hover {
  fill: rgba(255, 76, 41, 0.15);
  stroke: var(--color-danger);
}

.snapback-zone.active {
  fill: rgba(255, 76, 41, 0.25);
  stroke: var(--color-danger);
  stroke-width: 2px;
  animation: snapback-flash 1.5s infinite alternate;
}

@keyframes snapback-flash {
  from { fill: rgba(255, 76, 41, 0.15); }
  to { fill: rgba(255, 76, 41, 0.35); }
}

/* Details Card (Glassmorphism Sidebar) */
.details-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

.details-card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.details-card-header h3 {
  font-size: 1.15rem;
  color: var(--text-primary);
}

.details-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
  height: 100%;
  min-height: 250px;
  padding: 1.5rem;
  gap: 1rem;
}

.placeholder-icon {
  font-size: 3rem;
  opacity: 0.4;
  animation: bounce 2s infinite alternate;
}

@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-10px); }
}

.details-placeholder p {
  font-size: 0.9rem;
  max-width: 250px;
  line-height: 1.5;
}

.details-content {
  animation: fadeIn 0.3s ease;
}

.details-content.hidden {
  display: none !important;
}

.details-title-row {
  margin-bottom: 1.25rem;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.badge#details-category {
  background-color: var(--accent-cyan);
  color: var(--bg-primary);
}

.badge.badge-danger {
  background-color: var(--color-danger);
  color: #fff;
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { box-shadow: 0 0 2px var(--color-danger); }
  to { box-shadow: 0 0 10px var(--color-danger); }
}

#details-title {
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 0.1rem;
}

#details-english {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
}

.details-section {
  margin-top: 1.25rem;
}

.details-section h5 {
  font-size: 0.95rem;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.section-icon {
  font-size: 1rem;
}

.details-section p {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.warning-section {
  background-color: rgba(255, 123, 0, 0.08);
  border-left: 4px solid var(--accent-orange);
  padding: 0.75rem;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.warning-section h5 {
  color: var(--accent-orange);
}

.details-content.danger-mode .warning-section {
  background-color: var(--color-danger-bg);
  border-left-color: var(--color-danger);
}

.details-content.danger-mode .warning-section h5 {
  color: var(--color-danger);
}

/* Tab 3: Berthing Simulation Styles */
.canvas-wrapper canvas {
  background: radial-gradient(circle at center, #0d1e3d 0%, #061026 100%);
  border-radius: 8px;
  box-shadow: inset 0 0 20px rgba(0, 180, 216, 0.2);
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
}

.animation-controls {
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  background-color: rgba(10, 25, 47, 0.4);
  border-top: 1px solid var(--border-color);
}

/* Button UI */
.btn {
  font-family: var(--font-sans);
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background-color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  color: var(--bg-primary);
  font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
  background-color: #52e0c0;
  border-color: #52e0c0;
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.4);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Simulation Explanation Styling */
.sim-explanation-body {
  height: 100%;
  display: flex;
  flex-direction: column;
}

#sim-title {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
  color: #fff;
}

.sim-subtitle {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.sim-text-card {
  background-color: rgba(10, 25, 47, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.sim-text-card p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.sim-safety-tip {
  background-color: var(--color-danger-bg);
  border-left: 4px solid var(--color-danger);
  padding: 0.75rem;
  border-radius: 0 6px 6px 0;
}

.sim-safety-tip h5 {
  color: var(--color-danger);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.sim-safety-tip p {
  font-size: 0.8rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Quiz Section Styling */
.quiz-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-top: 1rem;
  box-shadow: var(--shadow-lg);
}

.quiz-header {
  text-align: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(100, 255, 218, 0.08);
  padding-bottom: 1.25rem;
}

.quiz-badge {
  display: inline-block;
  background-color: rgba(0, 180, 216, 0.15);
  color: var(--accent-blue);
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 30px;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(0, 180, 216, 0.2);
}

.quiz-header h2 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

.quiz-header p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.quiz-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quiz-card {
  background-color: rgba(10, 25, 47, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 1.5rem;
  transition: var(--transition-smooth);
}

.quiz-card:hover {
  border-color: rgba(100, 255, 218, 0.2);
  box-shadow: 0 4px 15px rgba(2, 12, 27, 0.4);
}

.question-number {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

.question-text {
  font-size: 1rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: 1rem;
}

.options-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 650px) {
  .options-list {
    grid-template-columns: 1fr;
  }
}

.option-btn {
  background-color: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  font-size: 0.88rem;
  font-family: var(--font-sans);
  transition: var(--transition-smooth);
}

.option-btn:hover:not(:disabled) {
  border-color: var(--accent-cyan);
  background-color: rgba(100, 255, 218, 0.05);
}

.option-btn.correct {
  background-color: var(--color-success-bg) !important;
  border-color: var(--color-success) !important;
  color: #fff !important;
  font-weight: 500;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.2);
}

.option-btn.incorrect {
  background-color: var(--color-danger-bg) !important;
  border-color: var(--color-danger) !important;
  color: #fff !important;
  box-shadow: 0 0 10px rgba(255, 76, 41, 0.2);
}

.option-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Quiz feedback panel style */
.quiz-feedback {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 6px;
  animation: fadeIn 0.3s ease;
}

.quiz-feedback.hidden {
  display: none !important;
}

.quiz-feedback.correct-feedback {
  background-color: var(--color-success-bg);
  border-left: 4px solid var(--color-success);
}

.quiz-feedback.incorrect-feedback {
  background-color: var(--color-danger-bg);
  border-left: 4px solid var(--color-danger);
}

.feedback-icon {
  font-size: 1.5rem;
  display: flex;
  align-items: center;
}

.feedback-content {
  display: flex;
  flex-direction: column;
}

.feedback-msg {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.correct-feedback .feedback-msg { color: #81c784; }
.incorrect-feedback .feedback-msg { color: #e57373; }

.feedback-explain {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-primary);
}

/* Summary Card */
.quiz-summary-card {
  margin-top: 2rem;
  background-color: rgba(10, 25, 47, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

@media (max-width: 550px) {
  .quiz-summary-card {
    flex-direction: column;
    text-align: center;
  }
}

.quiz-summary-card h3 {
  font-size: 1.1rem;
  color: #fff;
}

#quiz-progress-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.score-display {
  font-size: 1.25rem;
  font-weight: 700;
}

.score-display span {
  color: var(--accent-cyan);
  font-size: 1.7rem;
  text-shadow: 0 0 10px rgba(100, 255, 218, 0.5);
}

/* Footer Styling */
.app-footer {
  text-align: center;
  padding: 2rem 1.5rem 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 3rem;
}