/* ==========================================================================
   Harshawardhan Shrivastava — Developer Portfolio Design System
   Aesthetic: Dark Modern Glassmorphism with Tech Glow & High Contrast
   ========================================================================== */

:root {
  --bg-primary: #070a12;
  --bg-secondary: #0d1322;
  --bg-card: rgba(13, 19, 34, 0.75);
  --bg-card-hover: rgba(22, 32, 54, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);
  --border-glow: rgba(139, 92, 246, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #818cf8;

  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
  --gradient-card: linear-gradient(180deg, rgba(22, 32, 54, 0.6) 0%, rgba(13, 19, 34, 0.85) 100%);

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

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 12px 32px -8px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 28px rgba(99, 102, 241, 0.25);
  --transition-smooth: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(139, 92, 246, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.section-label::before {
  content: "//";
  color: var(--accent-purple);
  font-weight: bold;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 650px;
}

.section-header {
  margin-bottom: 3.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-subtle);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-subtle);
}
.btn-outline:hover {
  border-color: var(--accent-indigo);
  color: var(--text-accent);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-family: var(--font-mono);
}

.badge-live {
  background: rgba(16, 185, 129, 0.12);
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.3);
}

.badge-live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 10, 18, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo-symbol {
  color: var(--accent-indigo);
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 6.5rem 0 4.5rem;
  position: relative;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-full);
  margin-bottom: 1.75rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
}

.status-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: #c7d2fe;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 1.25rem;
}

.hero-role {
  font-size: 1.4rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-role-tag {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 1.15rem;
}

.hero-summary {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

/* Key Metrics Ribbon */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.metric-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.metric-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: var(--transition-smooth);
}

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

.metric-value {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.metric-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.metric-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Featured Systems / Projects Section
   ========================================================================== */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-border-top {
  border-top: 1px solid var(--border-subtle);
}

.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.project-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
}

.project-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-2px);
}

.project-meta-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.project-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-headline {
  font-size: 1.05rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.project-desc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.project-desc-item {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.project-desc-item::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent-indigo);
  font-weight: bold;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.tech-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-stats-box {
  background: rgba(7, 10, 18, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.spec-group-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.stat-item {
  margin-bottom: 1.25rem;
}
.stat-item:last-child {
  margin-bottom: 0;
}

.stat-num {
  font-size: 1.4rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #a5b4fc;
}

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

/* ==========================================================================
   Technical Skills Taxonomy Grid
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: var(--transition-smooth);
}

.skill-category-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.skill-cat-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.skill-cat-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pill {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  color: #cbd5e1;
  transition: var(--transition-smooth);
}

.skill-pill:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-indigo);
  color: #ffffff;
}

/* ==========================================================================
   Experience & Timeline
   ========================================================================== */
.experience-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--border-subtle);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}
.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2.45rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-indigo);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px var(--accent-indigo);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  margin-bottom: 0.35rem;
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

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

.side-cards-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.side-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

.side-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.achievement-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.achievement-item:last-child {
  margin-bottom: 0;
}

.trophy-icon {
  color: var(--accent-amber);
  font-size: 1.1rem;
  margin-top: 0.1rem;
}

/* ==========================================================================
   Contact & Collaboration Section
   ========================================================================== */
.contact-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.contact-direct-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(7, 10, 18, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.contact-link-item:hover {
  border-color: var(--border-focus);
  transform: translateX(5px);
  background: rgba(22, 32, 54, 0.8);
}

.contact-link-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(7, 10, 18, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #1e293b;
  border: 1px solid var(--accent-indigo);
  color: #ffffff;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  font-size: 0.92rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: var(--transition-smooth);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .project-card {
    grid-template-columns: 1fr;
  }
  .experience-layout {
    grid-template-columns: 1fr;
  }
  .contact-card {
    grid-template-columns: 1fr;
    padding: 2.5rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }
}