/* ==========================================================================
   CUSTOM STYLESHEET - PERSONAL PORTFOLIO & CREATIVE PLAYGROUND
   Theme: Aurora Cyber / Modern Maker
   Features: CSS Variables, Dark/Light Mode, Grid/Flexbox, Micro-interactions
   ========================================================================== */

/* --------------------------------------------------
   1. CSS Reset & Custom Properties (Theme Variables)
   -------------------------------------------------- */
:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(31, 41, 55, 0.9);
  --bg-glass: rgba(15, 23, 42, 0.75);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;       /* Indigo */
  --accent-secondary: #a855f7;     /* Purple */
  --accent-highlight: #06b6d4;     /* Cyan */
  --accent-glow: rgba(99, 102, 241, 0.35);
  --accent-lime: #a3e635;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);

  --font-sans: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', Consolas, monospace;

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.5);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(248, 250, 252, 0.85);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent-primary: #4f46e5;
  --accent-secondary: #9333ea;
  --accent-highlight: #0284c7;
  --accent-glow: rgba(79, 70, 229, 0.2);
  --accent-lime: #4d7c0f;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(79, 70, 229, 0.35);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  overflow-x: hidden;
  position: relative;
}

/* Subtle Animated Ambient Background Grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    radial-gradient(circle at 15% 15%, var(--accent-glow) 0%, transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(168, 85, 247, 0.15) 0%, transparent 40%),
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  opacity: 0.6;
  z-index: -1;
  pointer-events: none;
}

/* --------------------------------------------------
   2. Layout & Typography Utilities
   -------------------------------------------------- */
.container {
  width: min(1140px, calc(100% - 40px));
  margin-inline: auto;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-highlight);
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------
   3. Header & Navigation Bar
   -------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 28px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
}

/* --------------------------------------------------
   4. Hero Section
   -------------------------------------------------- */
.hero {
  padding: 80px 0 60px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 50px;
}

.hero-greeting {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--accent-highlight);
  font-family: var(--font-mono);
  margin-bottom: 20px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 10px #22c55e;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-highlight));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-bio {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

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

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 28px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

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

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Avatar Frame */
.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.avatar-wrapper {
  position: relative;
  width: min(340px, 90vw);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.3));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

/* --------------------------------------------------
   5. About Me Section
   -------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.about-card h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.about-card p {
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.quote-box {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-primary);
}

.skills-title {
  margin-top: 24px;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Quick Facts Aside Card */
.facts-card h3 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.facts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.fact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.fact-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.fact-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.fact-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* --------------------------------------------------
   6. Projects Section
   -------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.project-figure {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.project-card:hover .project-img {
  transform: scale(1.05);
}

.featured-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--accent-lime);
  color: #17211b;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
}

.project-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.tech-pill {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--text-secondary);
}

.project-links {
  display: flex;
  gap: 12px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* --------------------------------------------------
   7. Blog & Field Notes Section
   -------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.blog-card {
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast);
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.blog-category {
  color: var(--accent-secondary);
  font-weight: 600;
}

.blog-title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 12px;
}

.blog-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: 10px;
}

/* --------------------------------------------------
   8. Silly Stuff & Fun Zone Section
   -------------------------------------------------- */
.silly-zone {
  background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.05), transparent);
}

.silly-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

/* Excuse Machine */
.excuse-box {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.excuse-display {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  margin: 20px 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent-highlight);
  transition: all var(--transition-fast);
}

/* Duck Debugger */
.duck-box {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.duck-interactive-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  margin: 15px auto;
  cursor: pointer;
  user-select: none;
}

.duck-img {
  width: 100%;
  height: 100%;
  transition: transform 0.15s ease;
}

.duck-interactive-wrapper:hover .duck-img {
  transform: scale(1.1) rotate(5deg);
}

.duck-interactive-wrapper:active .duck-img {
  transform: scale(0.9) rotate(-10deg);
}

.speech-bubble {
  position: absolute;
  top: -24px;
  right: -30px;
  background: var(--accent-lime);
  color: #17211b;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  white-space: nowrap;
  animation: bounce 1.8s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.duck-counter {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 10px;
}

/* --------------------------------------------------
   9. Contact Section
   -------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.contact-info h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 30px;
}

.channel-link {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-primary);
  text-decoration: none;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.channel-link:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.channel-icon {
  font-size: 1.3rem;
  color: var(--accent-primary);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-status {
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

/* --------------------------------------------------
   10. Footer
   -------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 40px 0;
  margin-top: 60px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  transition: all var(--transition-fast);
}

.back-to-top:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------
   11. Responsive Media Queries
   -------------------------------------------------- */
@media (max-width: 900px) {
  .hero-grid,
  .about-grid,
  .silly-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .avatar-wrapper {
    width: 240px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-150%);
    opacity: 0;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    pointer-events: none;
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

/* --------------------------------------------------
   12. Music Player & Sound Controls (AC/DC - Back in Black)
   -------------------------------------------------- */
.music-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.music-toggle-btn:hover {
  border-color: #ef4444;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.music-toggle-btn.playing {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(245, 158, 11, 0.15));
  border-color: #ef4444;
  color: #f87171;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

.sound-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.sound-bars span {
  width: 2px;
  height: 4px;
  background-color: var(--text-muted);
  border-radius: 1px;
  transition: height 0.15s ease, background-color var(--transition-fast);
}

.music-toggle-btn.playing .sound-bars span {
  background-color: #f87171;
  animation: soundBarDance 0.8s ease-in-out infinite alternate;
}

.music-toggle-btn.playing .sound-bars span:nth-child(1) {
  animation-delay: 0.1s;
}

.music-toggle-btn.playing .sound-bars span:nth-child(2) {
  animation-delay: 0.3s;
}

.music-toggle-btn.playing .sound-bars span:nth-child(3) {
  animation-delay: 0.2s;
}

@keyframes soundBarDance {
  0% { height: 3px; }
  50% { height: 12px; }
  100% { height: 6px; }
}

/* Floating Audio Player Deck */
.floating-music-player {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 270px;
  transition: all var(--transition-smooth);
}

.floating-music-player:hover {
  border-color: var(--border-hover);
}

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

.player-track {
  display: flex;
  align-items: center;
  gap: 10px;
}

.track-icon {
  font-size: 1.25rem;
  color: #f59e0b;
}

.track-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.track-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.track-artist {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.player-equalizer {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 16px;
}

.player-equalizer .bar {
  width: 3px;
  height: 4px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all 0.2s ease;
}

.player-equalizer.active .bar {
  background: #f87171;
  animation: eqBounce 0.7s ease-in-out infinite alternate;
}

.player-equalizer.active .bar:nth-child(1) { animation-delay: 0.1s; }
.player-equalizer.active .bar:nth-child(2) { animation-delay: 0.35s; }
.player-equalizer.active .bar:nth-child(3) { animation-delay: 0.2s; }
.player-equalizer.active .bar:nth-child(4) { animation-delay: 0.45s; }

@keyframes eqBounce {
  0% { height: 4px; }
  100% { height: 16px; }
}

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

.player-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.player-btn:hover {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
  transform: scale(1.05);
}

.player-btn.playing {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
}

.volume-container {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-grow: 1;
}

.vol-icon {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.volume-slider {
  width: 100%;
  height: 4px;
  appearance: none;
  background: var(--bg-secondary);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-primary);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #ef4444;
}

.player-footer {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 640px) {
  .floating-music-player {
    bottom: 12px;
    right: 12px;
    left: 12px;
    width: auto;
  }
}