:root {
  --bg-color: #fdfdfb; /* Soft parchment white */
  --sidebar-bg: #ffffff;
  --text-color: #1a1a1a;
  --primary-color: #1a1c2c; /* Midnight ink */
  --accent-color: #9c846b; /* Antique gold */
  --highlight-color: #e0d5c1; /* Moonlight silk */
  --border-color: #e8e4db;
  --card-shadow: 0 20px 50px rgba(0,0,0,0.03);
  
  /* Element Colors (Sophisticated Palette) */
  --wood-color: #4a6741; /* Pine green */
  --fire-color: #a64438; /* Dried cinnabar */
  --earth-color: #bfa37e; /* Sand earth */
  --metal-color: #8c8c8c; /* Steel silver */
  --water-color: #3b5266; /* Deep ocean */
  
  --transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg-color: #0f1016; /* Deep night ink */
  --sidebar-bg: #161822;
  --text-color: #d1d1d1;
  --primary-color: #f0f0f0;
  --border-color: #242736;
  --card-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

body {
  margin: 0;
  font-family: 'Outfit', 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.8;
  letter-spacing: -0.01em;
  background-image: radial-gradient(circle at 50% -20%, rgba(156, 132, 107, 0.05), transparent);
}

h1, h2, h3, h4, h5 { 
  font-family: 'Noto Serif KR', 'Nanum Myeongjo', serif; 
  margin: 0; 
  font-weight: 700;
  word-break: keep-all;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 20px 120px;
}

/* Nav */
.top-nav {
  height: 80px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}

[data-theme="dark"] .top-nav {
  background: rgba(15, 16, 22, 0.8);
}

.logo { 
  font-family: 'Noto Serif KR', serif;
  font-size: 1.5rem; 
  font-weight: 900; 
  letter-spacing: 0.1em;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}
.logo:hover { opacity: 0.7; }

/* Input UX Improvements */
.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.custom-input-wrapper {
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.custom-input-wrapper input {
  width: 100%;
  border: none !important;
  padding: 15px 0 !important;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

/* Radio Pill Styling */
.selection-box-group {
  display: flex;
  gap: 15px;
  margin-top: 10px;
}

.radio-pill {
  display: flex;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  overflow: hidden;
  padding: 4px;
}

.radio-pill input[type="radio"] {
  display: none;
}

.radio-pill label {
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 25px;
  transition: var(--transition);
  color: #888;
  margin: 0 !important;
}

.radio-pill input[type="radio"]:checked + label {
  background: var(--primary-color);
  color: var(--bg-color);
}

/* Analyze Button Enhancement */
.analyze-btn {
  width: 100%;
  padding: 22px;
  background: var(--primary-color);
  color: var(--bg-color);
  border: none;
  border-radius: 50px; /* More modern curve */
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.analyze-btn:hover { 
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
  background: var(--accent-color);
}

/* Input Card (Wol-hyang style) */
.input-card {
  background: var(--sidebar-bg);
  padding: 80px 60px;
  border-radius: 2px; /* Oriental minimalism often uses sharp or very subtle curves */
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.input-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 4px;
  background: linear-gradient(to right, transparent, var(--accent-color), transparent);
}

.section-header h1 { 
  font-size: 2.8rem; 
  margin-bottom: 20px; 
  font-weight: 200;
  letter-spacing: -0.02em;
}
.section-header p { 
  color: #888; 
  margin-bottom: 50px; 
  font-weight: 300;
  letter-spacing: 0.05em;
}

.saju-form {
  max-width: 500px;
  margin: 0 auto;
  text-align: left;
}

.form-group label { 
  font-weight: 400; 
  font-size: 0.85rem; 
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.form-group input {
  padding: 15px 0;
  border: none;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0;
  font-size: 1.1rem;
  background: transparent;
  color: var(--text-color);
  transition: var(--transition);
  font-family: 'Noto Serif KR', serif;
}

.form-group input:focus {
  outline: none;
  border-bottom-color: var(--accent-color);
}

.radio-group {
  display: flex;
  gap: 30px;
  padding: 15px 0;
}

.radio-group label {
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.analyze-btn {
  width: 100%;
  padding: 22px;
  background: var(--primary-color);
  color: var(--bg-color);
  border: none;
  border-radius: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 40px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.analyze-btn:hover { 
  transform: translateY(-3px); 
  box-shadow: 0 15px 30px rgba(0,0,0,0.2);
  letter-spacing: 0.3em;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 60px;
}

.card {
  background: var(--sidebar-bg);
  padding: 50px;
  border-radius: 0;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
}

/* Saju Chart Rendering */
.saju-chart {
  display: flex;
  justify-content: space-between;
  margin: 40px 0;
  gap: 20px;
}

.chart-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  flex: 1;
}

.pillar-label { 
  font-size: 0.75rem; 
  font-weight: 600; 
  color: var(--accent-color); 
  letter-spacing: 0.2em;
}

.hanja-box {
  width: 100%;
  aspect-ratio: 0.8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 700;
  border-radius: 2px;
  color: white;
  transition: var(--transition);
  font-family: 'Noto Serif KR', serif;
}

.hanja-box:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.element-wood { background-color: var(--wood-color); }
.element-fire { background-color: var(--fire-color); }
.element-earth { background-color: var(--earth-color); }
.element-metal { background-color: var(--metal-color); }
.element-water { background-color: var(--water-color); }

/* Analysis Content */
.analysis-section h4 {
  font-size: 1.8rem;
  margin-bottom: 40px;
  color: var(--primary-color);
  text-align: center;
  letter-spacing: -0.02em;
  font-weight: 400;
}

.analysis-section h5 {
  font-size: 1.1rem;
  margin: 40px 0 20px;
  color: var(--accent-color);
  border-left: 2px solid var(--accent-color);
  padding-left: 15px;
}

.analysis-section p {
  color: var(--text-color);
  opacity: 0.9;
  margin-bottom: 25px;
  text-align: justify;
}

.expert-insight {
  background: var(--bg-color);
  padding: 40px;
  margin: 60px 0;
  border: 1px solid var(--border-color);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--accent-color);
  text-align: center;
  line-height: 2;
}

/* Element Balance Bars */
.balance-row {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 15px;
}

.label-name { width: 50px; font-weight: 400; font-size: 0.8rem; color: #888; }
.bar-container { flex: 1; height: 3px; background: var(--border-color); }
.bar-fill { height: 100%; transition: width 1.5s ease; }

/* Tabs */
.report-tabs {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 50px;
  border-bottom: 1px solid var(--border-color);
}

.report-tab {
  background: none;
  border: none;
  padding: 15px 0;
  font-size: 0.95rem;
  font-weight: 400;
  color: #aaa;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

.report-tab.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 60px;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #999;
  text-transform: uppercase;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.analysis-section {
  animation: fadeIn 1s ease-out;
}