/* ==========================================================================
   Sushank Shrestha - Portfolio Stylesheet
   Design: Modern Cyber-Clean Dark Theme with Cyan & Indigo Accents
   ========================================================================== */

:root {
  --bg-dark: #070b14;
  --bg-card: #0d1527;
  --bg-card-hover: #131f38;
  --bg-surface: #101a2e;
  --border: #1e293b;
  --border-focus: #38bdf8;
  
  --primary: #38bdf8;       /* Electric Cyan */
  --primary-glow: rgba(56, 189, 248, 0.25);
  --secondary: #6366f1;     /* Indigo */
  --accent: #10b981;        /* Emerald */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --nav-height: 74px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Basics */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(99, 102, 241, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

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

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

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
  z-index: 1000;
  transition: var(--transition);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-monogram {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1rem;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-text span {
  color: var(--primary);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 24px;
  align-items: center;
}

nav ul li a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

nav ul li a:hover,
nav ul li a.active {
  color: #fff;
}

nav ul li a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-admin-link {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}

.btn-admin-link:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  border-color: var(--primary);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #0284c7);
  color: #070b14;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.4);
  color: #070b14;
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(56, 189, 248, 0.06);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-live {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-live .pulse-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  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; }
}

/* ==========================================================================
   Sections Framework
   ========================================================================== */
section {
  padding: 100px 40px;
  max-width: 1240px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-desc {
  max-width: 650px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
#home {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 20px);
  padding-bottom: 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 60px;
  width: 100%;
}

.hero-content h1 {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 18px 0;
  letter-spacing: -1px;
}

.hero-content h1 span.gradient-text {
  background: linear-gradient(135deg, var(--primary), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.typewriter-container {
  display: inline-flex;
  align-items: center;
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 600;
  min-height: 38px;
  margin-bottom: 16px;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.3rem;
  background-color: var(--primary);
  margin-left: 4px;
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-bio {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 540px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.stat-item h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
}
.stat-item p {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Hero Visual Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.avatar-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: var(--radius-lg);
  padding: 8px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.3), rgba(99, 102, 241, 0.1));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.avatar-wrapper img {
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-lg) - 8px);
  object-fit: cover;
  background: var(--bg-card);
}

.floating-pill {
  position: absolute;
  background: rgba(16, 26, 46, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  animation: float 4s ease-in-out infinite;
}

.floating-pill.pill-1 {
  top: -15px;
  left: -20px;
}

.floating-pill.pill-2 {
  bottom: -15px;
  right: -20px;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
  line-height: 1.75;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.pillar-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.pillar-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pillar-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.skill-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.skill-box-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.skill-box-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #cbd5e1;
  transition: var(--transition);
}

.skill-tag:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  color: #070b14;
  border-color: var(--primary);
  box-shadow: 0 4px 14px var(--primary-glow);
}

#projects-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.project-thumb-container {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: #020617;
}

.project-thumb-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-category-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  text-transform: uppercase;
}

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

.project-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}

.project-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 18px;
  flex: 1;
}

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

.project-tech span {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3px 8px;
  border-radius: 4px;
  color: #94a3b8;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.project-footer a {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.project-footer .btn-view {
  color: var(--primary);
}
.project-footer .btn-view:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: start;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px;
}

.contact-info-card h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.contact-info-card p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 30px;
  line-height: 1.6;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.info-icon {
  width: 44px;
  height: 44px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.info-details h4 {
  font-size: 0.9rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-details p, .info-details a {
  font-size: 1rem;
  color: #fff;
  font-weight: 600;
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px;
}

.contact-form-wrapper h3 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  background: #090e1a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

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

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

/* Toast Alert */
.toast-alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.95rem;
  display: none;
}
.toast-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}
.toast-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  background: #04070d;
  border-top: 1px solid var(--border);
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-content {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

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

/* ==========================================================================
   Certificates & Achievements Section
   ========================================================================== */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.certificate-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.certificate-card:hover {
  transform: translateY(-5px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.certificate-thumb-container {
  width: 100%;
  height: 180px;
  background: #020617;
  overflow: hidden;
  position: relative;
}

.certificate-thumb-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.certificate-card:hover .certificate-thumb-container img {
  transform: scale(1.04);
}

.certificate-content {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.certificate-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 10px;
}

.certificate-issuer {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.certificate-date {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
}

.certificate-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
  line-height: 1.4;
}

.certificate-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
  flex: 1;
}

.certificate-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: auto;
}

.certificate-id {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: monospace;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-bio {
    margin: 0 auto 32px;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .hero-visual {
    order: -1;
    margin-bottom: 20px;
  }
  .about-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  header {
    padding: 0 20px;
  }
  .mobile-toggle {
    display: flex;
  }
  nav ul {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: #070b14;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    transform: translateY(-150%);
    transition: var(--transition);
  }
  nav ul.show {
    transform: translateY(0);
  }
  .hero-content h1 {
    font-size: 2.4rem;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  section {
    padding: 70px 20px;
  }
}