:root {
  /* --- Accent colours (same in both themes) --- */
  --accent-primary: #7c6bff; /* electric violet */
  --accent-secondary: #00e5ff; /* cyan */
  --accent-glow: rgba(124, 107, 255, 0.35);
  --accent-cyan-glow: rgba(0, 229, 255, 0.25);

  /* --- Easing --- */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* --- Typography --- */
  --font-display: "Syne", sans-serif;
  --font-body: "DM Sans", sans-serif;

  /* --- Sizes --- */
  --nav-h: 72px;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 40px;

  /* --- Transitions --- */
  --trans-fast: 0.18s var(--ease-smooth);
  --trans-mid: 0.35s var(--ease-smooth);
  --trans-slow: 0.55s var(--ease-smooth);
}

/* ============= DARK THEME (default) ============= */
[data-theme="dark"] {
  --bg-base: #0a0a12;
  --bg-surface: #10101e;
  --bg-elevated: #16162a;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-shadow: rgba(0, 0, 0, 0.4);

  --text-primary: #f0efff;
  --text-secondary: #9895be;
  --text-muted: #5a587a;

  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus: rgba(124, 107, 255, 0.4);

  --orb-1: rgba(124, 107, 255, 0.25);
  --orb-2: rgba(0, 229, 255, 0.18);
  --orb-3: rgba(255, 100, 200, 0.15);

  --code-bg: #0d0d1f;
}

/* ============= LIGHT THEME ============= */
[data-theme="light"] {
  --bg-base: #f0f0f8;
  --bg-surface: #e8e8f4;
  --bg-elevated: #ffffff;

  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --glass-shadow: rgba(100, 80, 200, 0.12);

  --text-primary: #14132a;
  --text-secondary: #4a4870;
  --text-muted: #9090b8;

  --input-bg: rgba(255, 255, 255, 0.7);
  --input-border: rgba(124, 107, 255, 0.25);
  --input-focus: rgba(124, 107, 255, 0.5);

  --orb-1: rgba(124, 107, 255, 0.18);
  --orb-2: rgba(0, 229, 255, 0.12);
  --orb-3: rgba(255, 100, 200, 0.1);

  --code-bg: #eeeef8;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition:
    background var(--trans-mid),
    color var(--trans-mid);
}

img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
}

/* ===================== TYPOGRAPHY ===================== */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 700;
}

/* ===================== GLASS UTILITY ===================== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(24pxpx) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  transition:
    background var(--trans-mid),
    border var(--trans-mid),
    box-shadow var(--trans-mid);
}

/* ===================== BACKGROUND ORBS ===================== */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 18s ease-in-out infinite;
}
.orb-1 {
  width: 500px;
  height: 500px;
  top: -100px;
  left: -150px;
  background: var(--orb-1);
  animation-duration: 20s;
}
.orb-2 {
  width: 400px;
  height: 400px;
  top: 40%;
  right: -120px;
  background: var(--orb-2);
  animation-delay: -8s;
  animation-duration: 16s;
}
.orb-3 {
  width: 350px;
  height: 350px;
  bottom: -80px;
  left: 35%;
  background: var(--orb-3);
  animation-delay: -14s;
  animation-duration: 22s;
}

@keyframes orbFloat {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(40px, -40px) scale(1.08);
  }
  66% {
    transform: translate(-30px, 30px) scale(0.94);
  }
}

#particles-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ===================== NAVBAR ===================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition:
    background var(--trans-mid),
    border-color var(--trans-mid),
    box-shadow var(--trans-mid);
}
.navbar.scrolled {
  box-shadow: 0 4px 30px var(--glass-shadow);
  background: var(--glass-bg);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 2.5rem);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* Logo */
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}
.logo-bracket {
  font-weight: 400;
  opacity: 0.7;
}

/* Nav links */
.nav-links {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}
.nav-link {
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition:
    color var(--trans-fast),
    background var(--trans-fast);
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border-radius: 99px;
  transition:
    left var(--trans-mid),
    right var(--trans-mid);
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}
.nav-link.active::after {
  left: 10%;
  right: 10%;
}

/* Nav controls */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ---- Theme toggle ---- */
.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
}
.toggle-track {
  position: relative;
  width: 56px;
  height: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 99px;
  display: flex;
  align-items: center;
  padding: 3px;
  transition: background var(--trans-mid);
  cursor: pointer;
}
.toggle-thumb {
  position: absolute;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  transition: transform var(--trans-mid);
  box-shadow: 0 0 10px var(--accent-glow);
}
[data-theme="light"] .toggle-thumb {
  transform: translateX(28px);
}

.icon-sun,
.icon-moon {
  position: absolute;
  width: 14px;
  height: 14px;
  transition: opacity var(--trans-fast);
  color: var(--text-secondary);
}
.icon-sun {
  right: 7px;
}
.icon-moon {
  left: 7px;
}
[data-theme="dark"] .icon-sun {
  opacity: 1;
}
[data-theme="dark"] .icon-moon {
  opacity: 0;
}
[data-theme="light"] .icon-sun {
  opacity: 0;
}
[data-theme="light"] .icon-moon {
  opacity: 1;
}

/* ---- Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition:
    transform var(--trans-mid),
    opacity var(--trans-fast);
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Mobile menu ---- */
.mobile-menu {
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.41);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-border);
  box-shadow: 0 12px 30px var(--glass-shadow);
}
.mobile-menu[hidden] {
  display: none;
}
.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.mobile-menu .nav-link {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.8rem;
  border-radius: 99px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  transition:
    transform var(--trans-fast),
    box-shadow var(--trans-fast),
    background var(--trans-fast);
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.08);
  opacity: 0;
  transition: opacity var(--trans-fast);
}
.btn:hover::after {
  opacity: 1;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-ghost {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===================== HERO ===================== */
.hero-section {
  min-height: 100dvh;
  padding-top: calc(var(--nav-h) + 3rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(1rem, 5vw, 2.5rem);
  padding-right: clamp(1rem, 5vw, 2.5rem);
}

.hero-content {
  grid-column: 1;
}

.hero-eyebrow {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.hero-name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  background: linear-gradient(
    135deg,
    var(--text-primary) 0%,
    var(--accent-primary) 60%,
    var(--accent-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.hero-name-first {
  font-size: 0.8em;
  font-weight: 700;
  letter-spacing: 0;
  margin-right: 0.15em;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  min-height: 2em;
  display: flex;
  align-items: center;
  gap: 2px;
}

.typed-text {
  color: var(--accent-primary);
}
.cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent-primary);
  border-radius: 1px;
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 2rem;
  line-height: 1.8;
}
.hero-desc strong {
  color: var(--text-primary);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: inline-flex;
  gap: 1.5rem;
  align-items: center;
  padding: 1rem 1.75rem;
  border-radius: var(--radius-lg);
}
.stat {
  text-align: center;
}
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat span {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--glass-border);
}

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

.avatar-ring {
  width: clamp(220px, 30vw, 340px);
  height: clamp(220px, 30vw, 340px);
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary),
    var(--accent-primary)
  );
  background-size: 200% 200%;
  animation: gradientSpin 5s linear infinite;
  box-shadow:
    0 0 60px var(--accent-glow),
    0 0 120px var(--accent-cyan-glow);
}
@keyframes gradientSpin {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.avatar-inner svg {
  width: 75%;
  height: 75%;
}

/* Floating badges */
.float-badge {
  position: absolute;
  padding: 0.45rem 0.9rem;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  animation: floatBadge 4s ease-in-out infinite;
}
.badge-1 {
  top: 10%;
  left: -10%;
  animation-delay: 0s;
}
.badge-2 {
  top: 10%;
  right: -10%;
  animation-delay: -1.3s;
}
.badge-3 {
  bottom: 15%;
  right: -5%;
  animation-delay: -2.7s;
}
@keyframes floatBadge {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  grid-column: 1 / -1;
}
.scroll-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-glow);
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%,
  100% {
    transform: translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateY(10px);
    opacity: 0.4;
  }
}

/* ===================== ABOUT ===================== */
/* Code window */
.code-window {
  border-radius: var(--radius-md);
  overflow: hidden;
}
.code-window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--glass-border);
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red {
  background: #ff5f57;
}
.dot-yellow {
  background: #febc2e;
}
.dot-green {
  background: #28c840;
}
.code-filename {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
}
.code-block {
  padding: 1.5rem;
  background: var(--code-bg);
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
  font-family: "Fira Code", "Cascadia Code", monospace;
}

/* Syntax colours */
.c-keyword {
  color: #c792ea;
}
.c-var {
  color: #82aaff;
}
.c-key {
  color: #f78c6c;
}
.c-string {
  color: #c3e88d;
}
.c-num {
  color: #f78c6c;
}
.c-bool {
  color: #ff9cac;
}

[data-theme="light"] .c-keyword {
  color: #7c3aed;
}
[data-theme="light"] .c-var {
  color: #2563eb;
}
[data-theme="light"] .c-key {
  color: #d97706;
}
[data-theme="light"] .c-string {
  color: #16a34a;
}
[data-theme="light"] .c-num {
  color: #ea580c;
}
[data-theme="light"] .c-bool {
  color: #dc2626;
}

/* About text */
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
}
.about-text strong {
  color: var(--text-primary);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}
.highlight {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  transition: transform var(--trans-fast);
}
.highlight:hover {
  transform: translateX(6px);
}
.hl-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
}
.highlight strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-primary);
}
.highlight span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===================== SKILLS / PROJECTS ===================== */
.project-card.hidden {
  display: none;
}

/* ===================== FOOTER ===================== */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
}
.footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.footer-note {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===================== SCROLL-TO-TOP ===================== */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition:
    transform var(--trans-fast),
    box-shadow var(--trans-fast),
    opacity var(--trans-mid);
  opacity: 0;
}
.scroll-top-btn:not([hidden]) {
  opacity: 1;
}
.scroll-top-btn[hidden] {
  display: flex;
  opacity: 0;
  pointer-events: none;
}
.scroll-top-btn:hover {
  transform: translateY(-3px) scale(1.08);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.scroll-top-btn svg {
  width: 20px;
  height: 20px;
}

/* ===================== ANIMATIONS ===================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.7s var(--ease-smooth),
    transform 0.7s var(--ease-smooth);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.15s;
}
.delay-2 {
  transition-delay: 0.3s;
}
.delay-3 {
  transition-delay: 0.45s;
}

/* Stagger children inside a grid */
.skills-grid .skill-card,
.projects-grid .project-card,
.timeline-item {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.55s var(--ease-smooth),
    transform 0.55s var(--ease-smooth);
}
.skills-grid .skill-card.visible,
.projects-grid .project-card.visible,
.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 900px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
  .hero-visual {
    display: none;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-controls {
    margin-left: auto;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
  }
  .hamburger {
    display: flex;
  }.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .nav-logo {
    margin-right: auto;
    /* logo chapda */
  }
}


@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
  .stat-divider {
    width: 80%;
    height: 1px;
  }
}

/* ===================== REDUCED MOTION ===================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}