@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================================
   1. CORE DESIGN SYSTEM & VARIABLES
   ============================================================ */
:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --text: #e5e7eb;
  --accent: #3b82f6;
  --btn-bg: #1d4ed8;
  --btn-bg-hover: #3b82f6;
  --btn-text: #ffffff;
  --btn-shadow: #3b82f6;
  --toast-red: rgb(245, 87, 87);
  --toast-green: lightgreen;

  /* Premium additions */
  --text-muted: #9ca3af;
  --nav-bg: rgba(10, 10, 10, 0.75);
  --nav-border: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.06);
  --card-bg: rgba(20, 20, 20, 0.6);
  --input-bg: #1f2937;
  --input-border: rgba(255, 255, 255, 0.1);
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --gradient-text: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
  --glow-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
}

:root.light {
  --bg: #f4f4f5;
  --bg-elevated: #e5e7eb;
  --text: #111;
  --accent: #dc2626;
  --btn-bg: #b91c1c;
  --btn-bg-hover: #dc2626;
  --btn-text: #ffffff;
  --btn-shadow: #dc2626;
  --toast-red: Red;
  --toast-green: green;

  /* Premium additions for light mode */
  --text-muted: #4b5563;
  --nav-bg: rgba(244, 244, 245, 0.75);
  --nav-border: rgba(0, 0, 0, 0.05);
  --card-border: rgba(0, 0, 0, 0.08);
  --card-bg: rgba(229, 229, 235, 0.6);
  --input-bg: #ffffff;
  --input-border: rgba(0, 0, 0, 0.15);
  --gradient-text: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
  --glow-shadow: 0 0 20px rgba(220, 38, 38, 0.15);
}

/* ============================================================
   2. RESET & GLOBAL STYLES
   ============================================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ============================================================
   3. REQUIRED BUTTON STYLE
   ============================================================ */
.btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 12px 24px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: 0.25s ease;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
}

.btn:hover {
  background: var(--btn-bg-hover);
  box-shadow: 0 0 12px var(--btn-shadow);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--text);
  box-shadow: 0 0 8px var(--btn-shadow);
}

:root.light .btn-secondary:hover {
  background: rgba(220, 38, 38, 0.1);
}

/* ============================================================
   4. NAVIGATION (STICKY & BURGER)
   ============================================================ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nav-border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.25s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

#theme-toggle {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--nav-border);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: 0.25s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

#theme-toggle:hover {
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--btn-shadow);
}

.burger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.burger-menu span {
  width: 100%;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
  transition: 0.3s ease;
}

/* ============================================================
   5. HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  gap: 4rem;
}

.hero-content {
  flex: 1.2;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  box-shadow: var(--glow-shadow);
}

.badge span {
  color: var(--accent);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 580px;
}

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

.hero-visual {
  flex: 0.8;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.svg-container {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 0 25px rgba(59, 130, 246, 0.15));
}

:root.light .svg-container {
  filter: drop-shadow(0 0 25px rgba(220, 38, 38, 0.15));
}

/* Float animations for SVG elements */
.svg-float-1 { animation: float-anim-1 6s ease-in-out infinite; }
.svg-float-2 { animation: float-anim-2 8s ease-in-out infinite; }
.svg-pulse { animation: pulse-anim 3s ease-in-out infinite; }

@keyframes float-anim-1 {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
}

@keyframes float-anim-2 {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(12px) rotate(-3deg); }
}

@keyframes pulse-anim {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ============================================================
   6. PROJECTS SECTION (GRID & GLASSMORPHISM)
   ============================================================ */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 12px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: var(--glow-shadow), 0 20px 40px rgba(0,0,0,0.2);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-text);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover::before {
  opacity: 1;
}

.project-card-header {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0,0,0,0.05);
  border-radius: 8px;
  padding: 1rem;
}

.project-card-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.project-card-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.project-tag:hover {
  background: var(--accent);
  color: var(--btn-text);
  transform: translateY(-2px);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 1rem;
}
.footer-social a {
  color: var(--text);
  transition: color 0.25s ease;
}
.footer-social a:hover {
  color: var(--accent);
}

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

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: opacity 0.2s ease;
}

.project-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ============================================================
   7. ABOUT SECTION (TIMELINE & SKILLS DASHBOARD)
   ============================================================ */
.about-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
}

.about-text h3 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.personal-details {
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.personal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.detail-item {
  display: flex;
  flex-direction: column;
}

.detail-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.detail-val {
  font-size: 0.95rem;
  font-weight: 600;
}

.timeline {
  position: relative;
  padding-left: 24px;
  border-left: 2px solid var(--card-border);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
}

.timeline-date {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Skills progress dashboard */
.skills-dashboard {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skill-bar-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
}

.skill-track {
  height: 8px;
  background: var(--bg-elevated);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.skill-fill {
  height: 100%;
  background: var(--gradient-text);
  border-radius: 4px;
  width: 0; /* Animated with class active on viewport scroll or script load */
  transition: width 1.5s cubic-bezier(0.1, 1, 0.1, 1);
  box-shadow: 0 0 8px var(--accent);
}

.language-chips {
  margin-top: 2rem;
}

.language-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.lang-chip {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-chip span {
  color: var(--accent);
  font-size: 0.8rem;
  margin-left: 4px;
}

/* ============================================================
   8. CONTACT SECTION
   ============================================================ */
.contact-container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 4rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-card {
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  padding: 1.75rem;
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  transition: border-color 0.25s ease;
}

.contact-card:hover {
  border-color: var(--accent);
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
  padding: 10px;
  border-radius: 8px;
  line-height: 1;
}

:root.light .contact-icon {
  background: rgba(220, 38, 38, 0.1);
}

.contact-details h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-details p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.form-input {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: all 0.25s ease;
  width: 100%;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--btn-shadow);
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

.login {
  opacity: 0;
}
.login.show {
  opacity: 1;
}

.toast {
  position: fixed;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  transition: transform 0.4s ease, opactity 0.4s ease;
  background: var(--bg);
  backdrop-filter: blur(12px);
  color: var(--text);
  padding: 14px 28px;
  border-radius: 50px;
  border: 1px solid var(--nav-border);
  animation: show 1s backwards;
  
}
.toast.show {
  transition: transform 0.4s ease, opactity 0.4s ease;
  transform: translateX(-50%) translateY(0);
  animation: show 1s forwards;
  
}
@keyframes show {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
  
}

/* ============================================================
   9. REQUIRED QUICK LINK CONTAINER (Theme Dependent)
   ============================================================ */
.quick-links {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000; /* Assures it's on top of elements */
}

.ql-btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 10px 18px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: 0.25s ease;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.ql-btn:hover {
  background: var(--btn-bg-hover);
  box-shadow: 0 0 10px var(--btn-shadow);
}

.ql-panel {
  margin-top: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--btn-shadow);
  border-radius: 8px;
  padding: 10px;
  display: none;
  flex-direction: column;
  gap: 8px;
  transition: 0.25s ease;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.ql-panel a {
  color: var(--text);
  text-decoration: none;
  padding: 6px 4px;
  border-radius: 4px;
  transition: 0.2s ease;
  font-size: 0.9rem;
  font-weight: 500;
}

.ql-panel a:hover {
  background: var(--btn-bg-hover);
  color: #fff;
}

/* ============================================================
   10. FOOTER
   ============================================================ */
footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--nav-border);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
}

.footer-logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   11. MOBILE RESPONSIVENESS & MEDIA QUERIES
   ============================================================ */
@media (max-width: 992px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 6rem;
    gap: 3rem;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .about-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  /* Navigation Mobile Toggle */
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg);
    border-bottom: 1px solid var(--nav-border);
    flex-direction: column;
    padding: 2rem 0;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.1, 1, 0.1, 1), opacity 0.3s ease;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    z-index: 98;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
  }

  .burger-menu {
    display: flex;
  }

  .burger-menu.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .burger-menu.open span:nth-child(2) {
    opacity: 0;
  }

  .burger-menu.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Responsive layout tweaks */
  section {
    padding: 4rem 1.5rem;
  }

  .hero {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  /* Buttons on mobile - larger tap targets */
  .btn, .ql-btn {
    padding: 14px 28px;
    font-size: 1.05rem;
    min-height: 48px; /* Standard mobile touch-target height */
  }

  .ql-btn {
    padding: 12px 20px;
  }

  .quick-links {
    bottom: 15px;
    right: 15px;
  }

  .ql-panel {
    max-width: 160px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .personal-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   12. ENHANCEMENT: PARTICLE CANVAS & INTERACTIVE TERMINAL
   ============================================================ */
#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: all; /* React to mouse events */
}

/* Ensure hero content sits above the canvas */
.hero-content, .hero-visual {
  position: relative;
  z-index: 2;
}

.terminal-card {
  width: 100%;
  max-width: 460px;
  background: rgba(15, 17, 23, 0.75);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35), var(--glow-shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  font-family: var(--font-mono);
}

:root.light .terminal-card {
  background: rgba(255, 255, 255, 0.75);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1), var(--glow-shadow);
}

.terminal-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: var(--accent);
}

.terminal-header {
  background: rgba(0, 0, 0, 0.2);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--card-border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.terminal-body {
  padding: 1.25rem;
  min-height: 280px;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #38bdf8; /* Light cyan in dark mode */
  text-align: left;
  overflow-y: auto;
}

:root.light .terminal-body {
  color: #b91c1c; /* Red text in light mode for match */
}

.terminal-line {
  margin-bottom: 0.5rem;
  white-space: pre-wrap;
}

.term-prompt {
  color: #10b981;
  font-weight: 600;
}

:root.light .term-prompt {
  color: #047857;
}

.term-command {
  color: var(--text);
}

.term-log {
  color: var(--text-muted);
}

.term-output {
  color: #fbbf24; /* Yellow output */
  font-weight: 500;
}

:root.light .term-output {
  color: #d97706;
}

.cursor {
  display: inline-block;
  background: var(--text);
  width: 8px;
  height: 15px;
  animation: blink 1s step-end infinite;
  margin-left: 2px;
  vertical-align: middle;
}

@keyframes blink {
  from, to { background-color: transparent }
  50% { background-color: var(--text); }
}

/* ============================================================
   13. ENHANCEMENT: INTERACTIVE TIMELINE SHOWCASE
   ============================================================ */
.showcase-toggle {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 10px;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.showcase-toggle:hover {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 8px var(--btn-shadow);
}

.showcase-details {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.1, 1, 0.1, 1), opacity 0.3s ease;
  margin-top: 0;
}

.showcase-details.open {
  max-height: 300px;
  opacity: 1;
  margin-top: 12px;
}

.showcase-details ul {
  list-style: none;
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.showcase-details li {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.showcase-details li span {
  font-size: 1rem;
}