:root {
  --bg-primary: #0a0b10;
  --bg-gradient: radial-gradient(circle at 50% 0%, #1a1535 0%, #0a0b10 100%);
  --glass-bg: rgba(20, 20, 35, 0.45);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --glass-blur: blur(12px);
  
  --text-primary: #f5f6fa;
  --text-secondary: #a0a5c0;
  
  --accent-color: #ff3c6b;
  --accent-hover: #ff1c53;
  --accent-glow: rgba(255, 60, 107, 0.4);
  
  --green: #00e676;
  --red: #ff3d00;
  --yellow: #ffd600;
  
  --font-main: 'Inter', sans-serif;
  --btn-bg-rgb: 255, 255, 255;
  --text-white-force: #ffffff;
  --title-gradient: linear-gradient(135deg, #ffffff 0%, #dfdfef 100%);
  --dropdown-opt-bg: #12131a;
}

body.light-theme {
  --bg-primary: #f5f6fa;
  --bg-gradient: radial-gradient(circle at 50% 0%, #eef0f7 0%, #f5f6fa 100%);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
  
  --text-primary: #1f2029;
  --text-secondary: #686e82;
  
  --accent-glow: rgba(255, 60, 107, 0.15);
  --btn-bg-rgb: 0, 0, 0;
  --text-white-force: #1f2029;
  --title-gradient: linear-gradient(135deg, #1f2029 0%, #4a4d5c 100%);
  --dropdown-opt-bg: #ffffff;
}

/* Portfolio Theme Overrides (Teal/Obsidian Theme) */
body.portfolio-page {
  --bg-primary: #090e14;
  --bg-gradient: radial-gradient(circle at 50% 0%, #0d2030 0%, #090e14 100%);
  --glass-bg: rgba(15, 25, 35, 0.55);
  --glass-border: rgba(255, 255, 255, 0.05);
  --accent-color: #00f0ff;
  --accent-hover: #00d8e6;
  --accent-glow: rgba(0, 240, 255, 0.25);
  --btn-bg-rgb: 0, 240, 255;
  --title-gradient: linear-gradient(135deg, #ffffff 0%, #aadaff 100%);
}

body.portfolio-page.light-theme {
  --bg-primary: #f0f4f8;
  --bg-gradient: radial-gradient(circle at 50% 0%, #e1e9f0 0%, #f0f4f8 100%);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-shadow: 0 8px 32px 0 rgba(0, 136, 204, 0.06);
  --text-primary: #1e2530;
  --text-secondary: #58667a;
  --accent-color: #0088cc;
  --accent-hover: #0077b3;
  --accent-glow: rgba(0, 136, 204, 0.12);
  --btn-bg-rgb: 0, 136, 204;
  --text-white-force: #1e2530;
  --title-gradient: linear-gradient(135deg, #1e2530 0%, #3a4b60 100%);
}

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

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 2.5rem 1.5rem;
  display: flex;
  justify-content: center;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.app-container {
  width: 100%;
  max-width: 1200px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Glassmorphism utility class */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Header Area */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

.btn-icon:hover {
  transform: scale(1.05);
  border-color: var(--accent-color);
  color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}


.logo-area {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.logo-icon {
  font-size: 2.2rem;
  color: var(--accent-color);
  text-shadow: 0 0 15px var(--accent-glow);
  transform: rotate(-15deg);
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-15deg); }
  50% { transform: translateY(-5px) rotate(-10deg); }
}

#main-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: var(--title-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.last-updated-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(var(--btn-bg-rgb), 0.04);
  border: 1px solid rgba(var(--btn-bg-rgb), 0.06);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.last-updated-badge i {
  color: var(--accent-color);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 60, 107, 0.25);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.route-badge {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.trend-icon {
  font-size: 1.2rem;
}

.trend-icon.green { color: var(--green); text-shadow: 0 0 10px rgba(0, 230, 118, 0.3); }
.trend-icon.red { color: var(--red); text-shadow: 0 0 10px rgba(255, 61, 0, 0.3); }
.trend-icon.yellow { color: var(--yellow); text-shadow: 0 0 10px rgba(255, 214, 0, 0.3); }

.price-val {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-white-force);
}

.card-footer {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.85rem;
}

.recommendation-badge {
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.recommendation-badge.buy {
  background: rgba(0, 230, 118, 0.15);
  color: var(--green);
}

.recommendation-badge.wait {
  background: rgba(255, 61, 0, 0.15);
  color: var(--red);
}

.trend-desc {
  color: var(--text-secondary);
}

/* Main Content Area (Chart) */
.main-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.control-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  background: rgba(var(--btn-bg-rgb), 0.04);
  border: 1px solid rgba(var(--btn-bg-rgb), 0.08);
  color: var(--text-secondary);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
}

.btn.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

.dropdown {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-family: var(--font-main);
  outline: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.dropdown option {
  background: var(--dropdown-opt-bg);
  color: var(--text-primary);
}

.chart-container {
  position: relative;
  width: 100%;
  height: 400px;
}

/* FAQ Section & Accordion Styles */
.faq-section {
  padding: 1.8rem;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.01);
  overflow: hidden;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.faq-item:hover {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 60, 107, 0.2);
}

.faq-question {
  padding: 1.2rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  list-style: none;
  outline: none;
  transition: color 0.3s ease;
}

.faq-question::-webkit-details-marker {
  display: none; /* Hide default webkit arrow */
}

.faq-question:hover {
  color: var(--accent-color);
}

.faq-question span {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.faq-question span i {
  color: var(--accent-color);
  font-size: 1.1rem;
}

.faq-arrow {
  transition: transform 0.3s ease, color 0.3s ease;
  color: var(--text-secondary);
}

details[open] .faq-question {
  border-bottom: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.02);
}

details[open] .faq-arrow {
  transform: rotate(180deg);
  color: var(--accent-color);
}

.faq-answer {
  padding: 1.2rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.faq-answer p {
  margin-bottom: 0.8rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer ul {
  margin-left: 1.5rem;
  margin-bottom: 0.8rem;
}

.faq-answer li {
  margin-bottom: 0.4rem;
}

.faq-answer pre {
  background: rgba(0, 0, 0, 0.3);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  overflow-x: auto;
  font-family: monospace;
  font-size: 0.85rem;
  color: #f1f2f6;
  margin: 0.8rem 0;
}

.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th, td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--glass-border);
}

th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-weight: 600;
}

tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.015);
}

tbody tr:last-child td {
  border-bottom: none;
}

.no-data {
  text-align: center;
  color: var(--text-secondary);
  padding: 2.5rem;
  font-style: italic;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.section-title i {
  color: var(--accent-color);
}

/* Responsive adjust */
@media(max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .chart-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .control-group {
    justify-content: space-between;
  }
  
  .control-group button {
    flex-grow: 1;
    text-align: center;
  }
}

/* Portfolio Page Custom Styles */
.hero-section {
  padding: 3.5rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-content {
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.hero-badge {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-color);
}

.hero-content h2 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  background: var(--title-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent-color);
  color: #ffffff !important;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(var(--btn-bg-rgb), 0.04);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn-secondary:hover {
  background: rgba(var(--btn-bg-rgb), 0.08);
  transform: translateY(-2px);
}

.portfolio-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2.2rem;
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 60, 107, 0.25);
}

.project-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent-color);
}

.project-details {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.project-details h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-white-force);
}

.project-details p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0.5rem 0;
}

.tag {
  font-size: 0.75rem;
  background: rgba(var(--btn-bg-rgb), 0.04);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
}

.project-link {
  font-weight: 600;
  color: var(--accent-color);
  text-decoration: none;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.2s ease;
}

.project-link:hover {
  gap: 0.6rem;
}

.project-link.disabled {
  color: var(--text-secondary);
  cursor: not-allowed;
  opacity: 0.6;
}

.contact-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-btn {
  background: rgba(var(--btn-bg-rgb), 0.04);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.3s ease;
}

.contact-btn:hover {
  background: rgba(var(--btn-bg-rgb), 0.08);
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* CV Layout & Timeline Styles */
.cv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 3rem;
  margin-top: 1rem;
}

.cv-subtitle {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.cv-subtitle i {
  color: var(--accent-color);
}

.cv-timeline {
  border-left: 2px solid var(--glass-border);
  padding-left: 1.8rem;
  margin-left: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.25rem;
  top: 0.28rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-glow);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-color);
  background: var(--accent-glow);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.timeline-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white-force);
  margin-bottom: 0.2rem;
}

.timeline-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.6rem;
}

.timeline-item p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-item ul {
  margin-left: 1.2rem;
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.timeline-item li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.skills-showcase {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.skill-category h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white-force);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.skill-tags {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}