/* ============================================================
   Praansu Karmacharya — Portfolio Styles
   Deep navy + warm gold palette
   ============================================================ */

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

:root {
  --bg-primary: #0B1120;
  --bg-secondary: #111B2E;
  --bg-card: rgba(17, 27, 46, 0.6);
  --bg-card-hover: rgba(17, 27, 46, 0.85);
  --accent: #F59E0B;
  --accent-glow: rgba(245, 158, 11, 0.25);
  --secondary: #38BDF8;
  --text: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: rgba(245, 158, 11, 0.1);
  --border-hover: rgba(245, 158, 11, 0.3);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* --- CONTAINER --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- NAVBAR --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
  padding: 0;
}

.navbar.scrolled {
  background: rgba(11, 17, 32, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  position: relative;
  z-index: 2;
}

.nav-logo::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.nav-logo:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

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

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Active nav link — highlighted by JS */
.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 2;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- SECTION COMMON --- */
.section {
  padding: 120px 0;
  position: relative;
}

/* Subtle section divider — a thin gradient line at bottom of each section */
.section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  max-width: 400px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.08), transparent);
}

/* Remove divider from contact (last section before footer) */
#contact::after {
  display: none;
}

/* Alternative divider color for alt sections */
.section-alt::after {
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.08), transparent);
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 60px;
}

.section-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  opacity: 0.7;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

/* ====== HERO ====== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 60px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(245, 158, 11, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 8s ease-in-out infinite alternate;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12), transparent 70%);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08), transparent 70%);
  bottom: -100px;
  left: -100px;
  animation-delay: -4s;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -40px) scale(1.1); }
}

.hero-shape {
  position: absolute;
  width: 400px;
  height: 400px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: shapeRotate 30s linear infinite;
  opacity: 0.5;
}

@keyframes shapeRotate {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.05em;
  animation: fadeInUp 0.8s ease;
}

.hero-title {
  margin-bottom: 20px;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-title-line {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-rotating {
  color: var(--accent);
  font-weight: 600;
  position: relative;
  display: inline-block;
  min-width: 100px;
}

.hero-rotating::after {
  content: '';
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  animation: blink 1s steps(2) infinite;
}

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

/* Rotating text flip animation */
.hero-rotating.flip-out {
  animation: flipOut 0.3s ease forwards;
}

.hero-rotating.flip-in {
  animation: flipIn 0.3s ease forwards;
}

@keyframes flipOut {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(-10px); opacity: 0; }
}

@keyframes flipIn {
  0% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  border: 2px solid var(--accent);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.08);
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.05rem;
}

/* --- SCROLL INDICATOR --- */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: fadeInUp 0.8s ease 0.8s both;
}

.scroll-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* --- ANIMATIONS --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- ABOUT --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.about-text strong {
  color: var(--text);
}

.about-quote {
  font-style: italic;
  color: var(--accent) !important;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  margin-top: 24px;
  font-size: 1rem !important;
  opacity: 0.85;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.06);
}

.stat-number {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- PROJECTS --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
  transform-style: preserve-3d;
  perspective: 800px;
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(245, 158, 11, 0.1);
}

/* Gradient accent bar at top of project cards */
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--secondary), transparent);
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
}

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

.project-card-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(245, 158, 11, 0.06),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

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

.project-content {
  position: relative;
  z-index: 1;
  padding: 28px;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.project-icon {
  font-size: 1.8rem;
  line-height: 1;
}

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

.project-links a {
  color: var(--text-secondary);
  transition: color var(--transition), transform var(--transition);
  display: flex;
}

.project-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.demo-link {
  color: var(--secondary) !important;
}

.demo-link:hover {
  color: var(--accent) !important;
}

.project-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tech span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.15);
  padding: 4px 10px;
  border-radius: 6px;
  transition: all var(--transition);
}

.project-tech span:hover {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.3);
}

/* --- SKILLS --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition);
}

.skill-group:hover {
  border-color: var(--border-hover);
}

.skill-group-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 20px;
}

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

.skill-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 6px 16px;
  border-radius: 100px;
  transition: all var(--transition);
  cursor: default;
}

.skill-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(245, 158, 11, 0.08);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.08);
  transform: translateY(-2px);
}

/* Staggered reveal for skill tags */
.skill-tag {
  opacity: 0;
  transform: translateY(10px);
  animation: tagReveal 0.4s ease forwards;
}

.skill-tag.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes tagReveal {
  to { opacity: 1; transform: translateY(0); }
}

/* --- GITHUB STATS --- */
.stats-github {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.stats-github img,
.stats-activity img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.stats-github img:hover,
.stats-activity img:hover {
  border-color: var(--border-hover);
}

/* --- CONTACT --- */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-text {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 36px;
  line-height: 1.8;
}

.contact-content .btn-large {
  margin-bottom: 40px;
}

.contact-socials {
  display: flex;
  justify-content: center;
  gap: 32px;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.social-link:hover {
  color: var(--accent);
  background: rgba(245, 158, 11, 0.05);
  border-color: var(--border);
  transform: translateY(-2px);
}

.social-link svg {
  flex-shrink: 0;
}

/* --- BACK TO TOP --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

/* --- FOOTER --- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .stats-github {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

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

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

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 17, 32, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    font-size: 1.2rem;
    color: var(--text);
  }

  .nav-toggle {
    display: flex;
  }

  .about-stats {
    gap: 16px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .contact-socials {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .hero-title-line {
    font-size: clamp(2.2rem, 12vw, 3rem);
  }

  .hero-desc {
    font-size: 1rem;
  }

  .project-content {
    padding: 20px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.85rem;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
  }
}

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}