/* MindMelody - Senior-Friendly Styling System */
@import url('https://fonts.googleapis.com/css2?family=Nanum+Gothic:wght@400;700;800&family=Outfit:wght@400;600;800&display=swap');

:root {
  /* Color Palette (Deep Indigo & Soft Gold / Sage Green) */
  --bg-primary: #0A0E1A;     /* Deep Night Blue */
  --bg-secondary: #141A29;   /* Midnight Blue Card */
  --bg-tertiary: #1E2638;    /* Lighter Blue card for interaction */
  
  --text-primary: #FFFFFF;
  --text-secondary: #D1D5DB;  /* High Contrast Gray */
  --text-muted: #9CA3AF;
  
  --accent-gold: #FFD43B;    /* High Contrast Gold for primary buttons/highlights */
  --accent-gold-hover: #FCC419;
  --accent-green: #51CF66;   /* Sage/Healing Green for Success and Breath */
  --accent-green-hover: #40C057;
  --accent-blue: #339AF0;    /* Calm Blue */
  --accent-red: #FF6B6B;     /* Alert/Cancel */
  
  /* Touch target sizes & spacing */
  --min-tap-target: 60px;
  --border-radius-large: 24px;
  --border-radius-medium: 16px;
  
  /* Font Scaling Options: Default, Large, Largest */
  --font-scale: 1.0; /* Adjusted by user in runtime */
  --font-base: 18px;
  
  /* Standard Transition */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(20, 26, 41, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow-premium: 0 10px 30px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Reset and Accessibility Defaults */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Nanum Gothic', 'Outfit', sans-serif;
  user-select: none; /* Prevent accidental text selection drag for seniors */
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: calc(var(--font-base) * var(--font-scale));
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Base Headings & Accessible Large Text */
h1 {
  font-size: calc(2.4rem * var(--font-scale));
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 1rem;
}

h2 {
  font-size: calc(1.8rem * var(--font-scale));
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 1.2rem;
}

h3 {
  font-size: calc(1.4rem * var(--font-scale));
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

p {
  font-size: calc(1.15rem * var(--font-scale));
  color: var(--text-secondary);
  line-height: 1.6;
  font-weight: 600; /* Extra bolding for better readability for elderly */
}

/* Main Layout Wrapper */
.app-container {
  max-width: 768px; /* Mobile first, senior friendly tablet-max width */
  margin: 0 auto;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  position: relative;
  border-left: 1px solid var(--glass-border);
  border-right: 1px solid var(--glass-border);
  box-shadow: var(--shadow-premium);
}

/* Top Utility Header */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem;
  background-color: var(--bg-secondary);
  border-bottom: 2px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-title {
  font-size: calc(1.3rem * var(--font-scale));
  font-weight: 800;
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-icon {
  font-size: 1.6rem;
}

.accessibility-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.text-scale-btn {
  background-color: var(--bg-tertiary);
  border: 2px solid var(--glass-border);
  color: var(--text-primary);
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--border-radius-medium);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  min-height: 44px;
}

.text-scale-btn:hover, .text-scale-btn:focus {
  border-color: var(--accent-gold);
  background-color: var(--bg-secondary);
  outline: none;
}

.speech-toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  transition: var(--transition-smooth);
}

.speech-toggle-btn.active {
  color: var(--accent-gold);
  background-color: rgba(255, 212, 59, 0.15);
  box-shadow: 0 0 15px rgba(255, 212, 59, 0.3);
}

/* App Main Content Area */
.app-content {
  flex: 1;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

/* View Sections */
.app-section {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
  flex-direction: column;
  flex: 1;
}

.app-section.active {
  display: flex;
}

/* Button & Touch Target Designs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: var(--min-tap-target);
  padding: 12px 24px;
  border-radius: var(--border-radius-large);
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  text-align: center;
  width: 100%;
  margin-top: 1rem;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--accent-gold);
  color: #0A0E1A;
}

.btn-primary:hover, .btn-primary:active {
  background-color: var(--accent-gold-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 212, 59, 0.4);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 3px solid var(--accent-gold);
}

.btn-secondary:hover, .btn-secondary:active {
  background-color: var(--bg-tertiary);
  transform: translateY(-2px);
}

.btn-success {
  background-color: var(--accent-green);
  color: #0A0E1A;
}

.btn-success:hover, .btn-success:active {
  background-color: var(--accent-green-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(81, 207, 102, 0.4);
}

.btn-disabled {
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
  border: 1px solid var(--glass-border);
  box-shadow: none;
}

/* Card Style for Seniors (Very clear and neat) */
.card {
  background-color: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-large);
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-premium);
  transition: var(--transition-smooth);
}

.card.interactive:hover, .card.interactive.selected {
  border-color: var(--accent-gold);
  background-color: var(--bg-tertiary);
  cursor: pointer;
  transform: scale(1.02);
}

/* Custom Grid Selection (e.g. for Emotion Choices) */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.option-card {
  background-color: var(--bg-secondary);
  border: 3px solid var(--glass-border);
  border-radius: var(--border-radius-medium);
  padding: 1.2rem;
  text-align: center;
  font-size: calc(1.1rem * var(--font-scale));
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  min-height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.option-card .icon {
  font-size: calc(2rem * var(--font-scale));
}

.option-card.selected {
  border-color: var(--accent-gold);
  background-color: rgba(255, 212, 59, 0.1);
  color: var(--accent-gold);
}

/* Onboarding Specific Styles */
.onboarding-hero {
  text-align: center;
  margin: 2rem 0;
}

.logo-animation {
  width: 120px;
  height: 120px;
  margin: 0 auto 1.5rem auto;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-gold) 0%, rgba(255, 212, 59, 0.2) 70%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  animation: pulseLogo 3s infinite ease-in-out;
}

/* Slider Style */
.slider-container {
  margin: 2rem 0;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 0.8rem;
}

.slider-input {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 24px;
  border-radius: 12px;
  background: var(--bg-tertiary);
  outline: none;
  border: 2px solid var(--glass-border);
  cursor: pointer;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-gold);
  border: 4px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
  cursor: pointer;
  transition: transform 0.1s;
}

.slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider-scale-values {
  display: flex;
  justify-content: space-between;
  padding: 0 10px;
  margin-top: 0.5rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* Session Player Styles */
.session-steps {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  position: relative;
}

.session-steps::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--bg-tertiary);
  z-index: 1;
  transform: translateY(-50%);
}

.step-indicator {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--bg-secondary);
  border: 3px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  z-index: 2;
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.step-indicator.active {
  border-color: var(--accent-gold);
  background-color: var(--accent-gold);
  color: var(--bg-primary);
  box-shadow: 0 0 15px rgba(255, 212, 59, 0.4);
}

.step-indicator.completed {
  border-color: var(--accent-green);
  background-color: var(--accent-green);
  color: var(--bg-primary);
}

/* Breathing Circle Animation (Meditation step) */
.breathing-outer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  margin: 1.5rem 0;
}

.breathing-circle-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.breathing-circle {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(81, 207, 102, 0.4) 0%, rgba(81, 207, 102, 0.1) 70%);
  border: 4px solid var(--accent-green);
  transition: transform 4s linear; /* will dynamic change via JS */
  box-shadow: 0 0 30px rgba(81, 207, 102, 0.3);
}

.breathing-text {
  position: relative;
  z-index: 2;
  font-size: calc(1.6rem * var(--font-scale));
  font-weight: 800;
  color: #FFFFFF;
  text-align: center;
  text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

.breathing-timer {
  margin-top: 1.5rem;
  font-size: calc(1.5rem * var(--font-scale));
  font-weight: 700;
  color: var(--accent-gold);
}

/* Music & Art Activity (Mandala) Step */
.activity-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.audio-info-card {
  width: 100%;
  text-align: center;
}

.audio-progress-bar {
  width: 100%;
  height: 12px;
  background-color: var(--bg-tertiary);
  border-radius: 6px;
  margin: 1rem 0;
  overflow: hidden;
  position: relative;
}

.audio-progress-fill {
  height: 100%;
  width: 0%;
  background-color: var(--accent-gold);
  transition: width 0.1s linear;
}

.canvas-container {
  width: 100%;
  max-width: 450px;
  aspect-ratio: 1;
  background-color: var(--bg-secondary);
  border: 4px solid var(--glass-border);
  border-radius: var(--border-radius-large);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-premium);
  touch-action: none; /* Enable custom touch painting on mobile */
}

#mandala-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.art-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  width: 100%;
  margin-top: 0.5rem;
}

.color-swatch {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.color-swatch:hover, .color-swatch.selected {
  transform: scale(1.2);
  border-color: #FFFFFF;
  box-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.art-tool-btn {
  background-color: var(--bg-tertiary);
  border: 2px solid var(--glass-border);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--border-radius-medium);
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
}

.art-tool-btn:hover {
  border-color: var(--accent-gold);
}

/* Reflection & Journal Step */
.journal-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.journal-textarea {
  width: 100%;
  min-height: 180px;
  background-color: var(--bg-secondary);
  border: 3px solid var(--glass-border);
  border-radius: var(--border-radius-medium);
  padding: 1rem;
  color: var(--text-primary);
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 600;
  resize: none;
  outline: none;
}

.journal-textarea:focus {
  border-color: var(--accent-gold);
}

.voice-input-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 1rem;
}

.mic-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: var(--accent-gold);
  border: none;
  font-size: 2rem;
  color: var(--bg-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  box-shadow: 0 0 20px rgba(255, 212, 59, 0.4);
}

.mic-btn:hover {
  transform: scale(1.05);
}

.mic-btn.listening {
  background-color: var(--accent-red);
  color: #FFFFFF;
  animation: micPulse 1.5s infinite ease-in-out;
  box-shadow: 0 0 20px rgba(255, 107, 107, 0.5);
}

.voice-status-text {
  font-size: calc(1.1rem * var(--font-scale));
  font-weight: 700;
  color: var(--accent-gold);
}

/* Playlist items */
.playlist-container {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.playlist-item {
  background-color: var(--bg-tertiary);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-medium);
  padding: 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.playlist-item:hover, .playlist-item.active {
  border-color: var(--accent-gold);
  background-color: rgba(255, 212, 59, 0.05);
}

.playlist-item-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.playlist-item-title {
  font-size: calc(1.2rem * var(--font-scale));
  font-weight: 800;
  color: var(--text-primary);
}

.playlist-item-desc {
  font-size: calc(0.95rem * var(--font-scale));
  color: var(--text-secondary);
}

.playlist-item-action {
  font-size: 1.8rem;
  color: var(--accent-gold);
}

/* Dashboard & History Layout */
.dashboard-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.summary-card {
  background-color: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  padding: 1.2rem;
  border-radius: var(--border-radius-medium);
  text-align: center;
}

.summary-num {
  font-size: calc(2.2rem * var(--font-scale));
  font-weight: 800;
  color: var(--accent-gold);
}

.chart-card {
  background-color: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  padding: 1.5rem;
  border-radius: var(--border-radius-large);
  margin-bottom: 1.5rem;
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 200px;
  background-color: var(--bg-primary);
  border-radius: var(--border-radius-medium);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  margin-top: 1rem;
}

#mood-chart {
  width: 100%;
  height: 100%;
  display: block;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 1rem;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 6px;
}

/* Custom Scrollbar for elderly comfort */
.history-list::-webkit-scrollbar {
  width: 8px;
}
.history-list::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
.history-list::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.history-card {
  background-color: var(--bg-secondary);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-medium);
  padding: 1.2rem;
  position: relative;
}

.history-card-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 6px;
}

.history-date {
  font-weight: 700;
  color: var(--text-secondary);
}

.history-mood-badge {
  background-color: rgba(255, 212, 59, 0.2);
  color: var(--accent-gold);
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
}

/* Success Checkmark & Overlay */
.success-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(10, 14, 26, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  animation: fadeIn 0.3s ease-out forwards;
}

.checkmark-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: var(--accent-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: var(--bg-primary);
  margin-bottom: 1.5rem;
  animation: scaleUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Modal styles for terms */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1.5rem;
  animation: fadeIn 0.3s ease-out;
}

.modal-content {
  background-color: var(--bg-secondary);
  border: 3px solid var(--accent-gold);
  border-radius: var(--border-radius-large);
  padding: 2rem;
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-premium);
}

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

@keyframes scaleUp {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes pulseLogo {
  0% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 212, 59, 0.2); }
  50% { transform: scale(1.05); box-shadow: 0 0 35px rgba(255, 212, 59, 0.4); }
  100% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 212, 59, 0.2); }
}

@keyframes micPulse {
  0% { transform: scale(1); box-shadow: 0 0 0px rgba(255, 107, 107, 0.4); }
  50% { transform: scale(1.08); box-shadow: 0 0 20px rgba(255, 107, 107, 0.7); }
  100% { transform: scale(1); box-shadow: 0 0 0px rgba(255, 107, 107, 0.4); }
}

/* Responsive Overrides */
@media (max-width: 480px) {
  .options-grid {
    grid-template-columns: 1fr;
  }
  .dashboard-summary {
    grid-template-columns: 1fr;
  }
}