/* ══════════════════════════════════════════════════════════════════
   ARPAN ROY — PORTFOLIO STYLESHEET
   
   Fonts: Syne (display) · Space Grotesk (body) · JetBrains Mono (code)
   Palette:
     --ink-1:     #05060f  (deep space)
     --ink-2:     #0a0d1e  (dark navy)
     --blue-dark: #0d1b3e  (midnight)
     --purple:    #5b2d8e  (electric purple)
     --cyan:      #00d4ff  (signal cyan)
     --violet:    #a259ff  (aurora violet)
     --text-1:    #e8eaf6  (near-white)
     --text-2:    #8892b0  (slate)
     --glass-bg:  rgba(255,255,255,0.04)
     --glass-bd:  rgba(255,255,255,0.08)
   ══════════════════════════════════════════════════════════════════ */

/* ─── Reset & Base ───────────────────────────────────────────── */

*,
*::before,
*::after {

  margin: 0;
  padding: 0;
}

:root {
  /* Core palette */
  --ink-1: #05060f;
  --ink-2: #090c1d;
  --blue-dark: #0d1b3e;
  --purple: #5b2d8e;
  --purple-mid: #7b3fc4;
  --cyan: #00d4ff;
  --cyan-dim: #00aecb;
  --violet: #a259ff;
  --text-1: #e8eaf6;
  --text-2: #8892b0;
  --text-3: #4a5568;
  --success: #10b981;
  --error: #f87171;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.06);
  --glass-bd: rgba(255, 255, 255, 0.07);
  --glass-bd-hover: rgba(0, 212, 255, 0.25);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --nav-h: 68px;
  --section-py: clamp(80px, 10vw, 130px);
  --max-w: 1200px;

  /* Gradients */
  --grad-cyan-violet: linear-gradient(135deg, var(--cyan), var(--violet));
  --grad-text: linear-gradient(90deg, var(--cyan) 0%, var(--violet) 100%);

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light mode variables */
body.light-mode {
  --ink-1: #f0f4ff;
  --ink-2: #e8eef8;
  --blue-dark: #dde6f8;
  --glass-bg: rgba(0, 0, 0, 0.03);
  --glass-bg-hover: rgba(0, 0, 0, 0.06);
  --glass-bd: rgba(0, 0, 0, 0.09);
  --glass-bd-hover: rgba(0, 130, 200, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --text-1: #0e1628;
  --text-2: #4a5568;
  --text-3: #a0aec0;
        --primary-color: #a855f7;
      --secondary-color: #7e22ce;
      --accent-color: #c084fc;
      --bg-color: #090514;
      --card-bg: rgba(21, 11, 38, 0.65);
      --border-color: rgba(168, 85, 247, 0.2);
      --glow-color: rgba(168, 85, 247, 0.15);
      
      /* Subtle transparency maps */
      --accent-color-10: rgba(192, 132, 252, 0.1);
      --accent-color-20: rgba(192, 132, 252, 0.2);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--font-body);
  background: var(--ink-1);
  color: var(--text-1);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  cursor: none;
  transition: background 0.4s, color 0.4s;
}

/* Remove cursor: none for touch devices */
@media (hover: none) {
  body {
    cursor: auto;
  }

  #cursor,
  #cursor-trail {
    display: none;
  }
}

/* ─── Typography helpers ─────────────────────────────────────── */
.mono {
  font-family: var(--font-mono);
}

.gradient-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

em {
  font-style: normal;
  color: var(--cyan);
}

/* ─── Glass card ─────────────────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-bd);
  border-radius: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--glass-shadow);
  transition: border-color 0.3s, background 0.3s, transform 0.3s var(--ease-out), box-shadow 0.3s;
}

.glass-card:hover {
  border-color: var(--glass-bd-hover);
  background: var(--glass-bg-hover);
  box-shadow: var(--glass-shadow), 0 0 24px rgba(0, 212, 255, 0.06);
}

/* ─── Buttons ────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--grad-cyan-violet);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.15);
  opacity: 0;
  transition: opacity 0.25s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: transparent;
  color: var(--text-1);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid var(--glass-bd-hover);
  border-radius: 10px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.25s var(--ease-spring);
}

.btn-ghost:hover {
  background: rgba(0, 212, 255, 0.07);
  border-color: var(--cyan);
  transform: translateY(-2px);
  color: var(--cyan);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.875rem;
  border-radius: 8px;
}

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

.btn-arrow {
  flex-shrink: 0;
  transition: transform 0.25s;
}

.btn-primary:hover .btn-arrow,
.btn-ghost:hover .btn-arrow {
  transform: translateX(3px);
}

/* ─── Custom Cursor ──────────────────────────────────────────── */
#cursor {
  width: 10px;
  height: 10px;
  background: var(--cyan);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.1s, width 0.2s, height 0.2s, background 0.2s;
  mix-blend-mode: screen;
}

#cursor-trail {
  width: 26px;
  height: 26px;
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: left 0.12s var(--ease-out), top 0.12s var(--ease-out), width 0.25s, height 0.25s;
}

body.cursor-hover #cursor {
  width: 20px;
  height: 20px;
  background: var(--violet);
}

body.cursor-hover #cursor-trail {
  width: 52px;
  height: 52px;
  border-color: rgba(162, 89, 255, 0.4);
}

/* ─── Loader ─────────────────────────────────────────────────── */
#loader {
  position: fixed;
  inset: 0;
  background: var(--ink-1);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

#loader.hide {
  opacity: 0;
  transform: scale(1.03);
  pointer-events: none;
}

.loader-inner {
  text-align: center;
}

.loader-logo {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
  letter-spacing: -2px;
}

.loader-bar {
  width: 200px;
  height: 2px;
  background: var(--glass-bd);
  border-radius: 99px;
  overflow: hidden;
  margin: 0 auto 16px;
}

.loader-fill {
  height: 100%;
  width: 0%;
  background: var(--grad-cyan-violet);
  border-radius: 99px;
  animation: loadBar 1.8s var(--ease-out) forwards;
}

@keyframes loadBar {
  to {
    width: 100%;
  }
}

.loader-label {
  font-size: 0.75rem;
  color: var(--text-2);
  letter-spacing: 0.1em;
}

/* ─── Navigation ─────────────────────────────────────────────── */
#navbar {
  position: fixed;
  height: 80px;
  width: 90%;
  margin-left: 60px;
  background-color: var(--glass-bg);
  border-radius: 30px;
  margin-top: 30px;
  z-index: 1000;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

#navbar.scrolled {
  background: rgba(5, 6, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-bd);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

body.light-mode #navbar.scrolled {
  background: rgba(240, 244, 255, 0.88);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 clamp(20px, 4vw, 48px);
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-1);
  text-decoration: none;
  letter-spacing: -1px;
  flex-shrink: 0;
  transition: color 0.2s;
}

.logo-bracket {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 5px;
  list-style: none;
  margin-left: auto;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-2);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  letter-spacing: 0.02em;
}

.nav-link:hover {
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.07);
}

.nav-link.active {
  color: var(--cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-bd);
  color: var(--text-2);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

#theme-toggle:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 212, 255, 0.07);
}

.btn-resume {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 8px 16px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}

.btn-resume:hover {
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.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 {
  display: none;
  background: rgba(5, 6, 15, 0.96);
  border-bottom: 1px solid var(--glass-bd);
  padding: 20px clamp(20px, 4vw, 48px) 24px;
  backdrop-filter: blur(20px);
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-link {
  display: block;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-2);
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.mobile-link:hover {
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.07);
}

/* ─── Section layout ─────────────────────────────────────────── */
section {
  padding: var(--section-py) 0;
  position: relative;
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

.section-header {
  margin-bottom: clamp(48px, 6vw, 72px);
  max-width: 600px;
}

.section-eyebrow {
  display: block;
  font-size: 0.78rem;
  color: var(--cyan);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  text-transform: lowercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-1);
  line-height: 1.15;
  letter-spacing: -1px;
}

.section-subtitle {
  margin-top: 16px;
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ─── Scroll reveal ──────────────────────────────────────────── */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal-left {
  transform: translateX(-30px);
}

.reveal-right {
  transform: translateX(30px);
}

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

.delay-1 {
  transition-delay: 0.1s;
}

.delay-2 {
  transition-delay: 0.2s;
}

.delay-3 {
  transition-delay: 0.3s;
}

.delay-4 {
  transition-delay: 0.4s;
}

.delay-5 {
  transition-delay: 0.5s;
}

/* ─── Hero ───────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) clamp(20px, 4vw, 48px) 80px;
}

#starfield {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Nebula blobs */
.nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: nebulaDrift 20s ease-in-out infinite;
}

.nebula-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(91, 45, 142, 0.18) 0%, transparent 70%);
  top: -200px;
  left: -200px;
  animation-delay: 0s;
}

.nebula-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, transparent 70%);
  top: 50%;
  right: -150px;
  animation-delay: -7s;
}

.nebula-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(162, 89, 255, 0.1) 0%, transparent 70%);
  bottom: -100px;
  left: 30%;
  animation-delay: -14s;
}

@keyframes nebulaDrift {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(20px, -20px) scale(1.04);
  }

  66% {
    transform: translate(-15px, 15px) scale(0.97);
  }
}

.hero-content {
  margin-top: 60px;
  position: relative;
  z-index: 2;
  max-width: 860px;
  
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 99px;
  font-size: 0.72rem;
  color: var(--cyan);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.7);
  }
}

.hero-name {
  
  font-family: var(--font-display);
  font-size: 90px;
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: 2px;
  
}

.name-line {

  color: var(--text-1);
}



.hero-tagline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-height: 30px;
  margin-bottom: 24px;
}

.prefix {
  color: var(--cyan);
  opacity: 0.5;
  margin-right: 4px;
  font-size: 0.9rem;
}

.typewriter-text {
  color: var(--text-2);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.cursor-blink {
  color: var(--cyan);
  animation: blink 1s step-end infinite;
  font-size: 0.9rem;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.hero-bio {
  max-width: 560px;
  margin: 0 auto 36px;
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border-top: 1px solid var(--glass-bd);
  padding-top: 36px;
}

.stat-item {
  text-align: center;
  padding: 0 40px;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 6px;
  font-family: var(--font-mono);
}

.stat-divider {
  width: 1px;
  height: 50px;
  background: var(--glass-bd);
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  z-index: 2;
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-mouse {
  width: 22px;
  height: 36px;
  border: 2px solid var(--text-3);
  border-radius: 11px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-wheel {
  width: 3px;
  height: 7px;
  background: var(--cyan);
  border-radius: 2px;
  animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {

  0%,
  100% {
    transform: translateY(0);
    opacity: 1;
  }

  60% {
    transform: translateY(6px);
    opacity: 0;
  }
}

@keyframes scrollBounce {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(5px);
  }
}

.scroll-text {
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.1em;
}

/* ─── About ──────────────────────────────────────────────────── */
#about {
  background: var(--ink-2);
}

.about-grid {
  display: flex;
  gap: 20px;
  align-items: start;
}

.about-text p {
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 20px;
  font-size: 1.02rem;
}

.about-lead {
  color: var(--text-1) !important;
  font-size: 1.15rem !important;
  font-weight: 500;
  line-height: 1.6 !important;
  margin-bottom: 24px !important;
}

.about-text strong {
  color: var(--text-1);
}

.about-education {
  margin-top: 32px;
}

.edu-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 24px;
}

.edu-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.edu-details h4 {
  color: var(--text-1);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 4px;
}

.edu-details p {
  color: var(--text-2);
  font-size: 0.82rem;
  margin: 2px 0;
}

.edu-gpa {
  color: var(--cyan) !important;
  font-size: 0.8rem !important;
}

.interests-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.interest-card {
  padding: 18px 16px;
  text-align: center;
  transition: transform 0.25s var(--ease-spring);
}

.interest-card:hover {
  transform: translateY(-4px);
}

.interest-icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 8px;
}

.interest-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 6px;
}

.interest-card p {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.5;
}

.my-photo{
  height: 500px;
  width: 500px;
  border-radius: 20px;
  background-image:url(myav.png) ;
  background-size: contain;
  margin-left: 150px;
  margin-bottom: 40px;
}

/* ─── Skills ─────────────────────────────────────────────────── */
#skills {
  background: var(--ink-1);
}

    :root {
      --primary-color: #a855f7;
      --secondary-color: #7e22ce;
      --accent-color: #c084fc;
      --bg-color: #090514;
      --card-bg: rgba(21, 11, 38, 0.65);
      --border-color: rgba(168, 85, 247, 0.2);
      --glow-color: rgba(168, 85, 247, 0.15);
      
      /* Subtle transparency maps */
      --accent-color-10: rgba(192, 132, 252, 0.1);
      --accent-color-20: rgba(192, 132, 252, 0.2);
    }

  

    /* Custom scrollbars */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: var(--bg-color);
    }
    ::-webkit-scrollbar-thumb {
      background: var(--border-color);
      border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: var(--accent-color);
    }

    /* Interactive components styling overrides */
    .category-tab.active {
      border-color: var(--accent-color) !important;
      background: var(--accent-color-10) !important;
      color: white !important;
      box-shadow: 0 0 15px var(--glow-color);
    }

    /* Glassmorphism style overrides */
    .skill-group-card {
      background: var(--card-bg);
      border-color: var(--border-color);
      backdrop-filter: blur(12px);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    }

    .skill-card-inner {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.05);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .skill-card-inner:hover {
      background: var(--accent-color-10);
      border-color: var(--accent-color-20);
      box-shadow: 0 0 20px var(--glow-color);
      transform: translateY(-2px);
    }

    
    /* Orbit Layout Special Styles */
    .orbit-ring {
      position: absolute;
      border: 1px dashed rgba(255, 255, 255, 0.08);
      border-radius: 50%;
      pointer-events: none;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }
    .orbit-node {
      position: absolute;
      top: 50%;
      left: 50%;
      transform-origin: center;
      transition: all 0.3s ease;
    }
    .orbit-node-inner {
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.4);
      transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }
    .orbit-node-inner:hover {
      transform: scale(1.2) !important;
      border-color: var(--accent-color);
      box-shadow: 0 0 20px var(--glow-color);
    }
    @keyframes orbit-cw {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }
    @keyframes orbit-ccw {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(-360deg); }
    }
    .animate-orbit-cw {
      animation: orbit-cw 40s linear infinite;
    }
    .animate-orbit-ccw {
      animation: orbit-ccw 55s linear infinite;
    }
    .animate-orbit-cw:hover, .animate-orbit-ccw:hover {
      animation-play-state: paused;
    }
    
/* ─── Projects ───────────────────────────────────────────────── */
#projects {
  background: var(--ink-2);
}

/* Featured */
.project-featured {
  padding: 0;
  margin-bottom: 28px;
  overflow: hidden;
  border-radius: 20px;
}

.project-featured-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 40px;
}

.project-featured-badge {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.project-featured-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-1);
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.bengali-sub {
  font-size: 0.7em;
  color: var(--violet);
  opacity: 0.8;
}

.project-featured-desc {
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 480px;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tech-tag {
  padding: 4px 10px;
  background: rgba(162, 89, 255, 0.1);
  border: 1px solid rgba(162, 89, 255, 0.2);
  border-radius: 5px;
  font-size: 0.75rem;
  color: var(--violet);
  font-family: var(--font-mono);
}

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

/* Project mock screen */
.project-featured-visual {
  flex-shrink: 0;
}

.project-mock {
  width: 260px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-bd);
  border-radius: 12px;
  overflow: hidden;
}

.mock-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--glass-bd);
}

.mock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.mock-dot.red {
  background: #ff5f57;
}

.mock-dot.yellow {
  background: #febc2e;
}

.mock-dot.green {
  background: #28c840;
}

.mock-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-line {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  animation: shimmer 2.5s ease-in-out infinite;
}

.mock-block {
  height: 60px;
  background: rgba(0, 212, 255, 0.05);
  border-radius: 8px;
  margin: 4px 0;
  border: 1px solid rgba(0, 212, 255, 0.1);
  animation: shimmer 2.5s ease-in-out infinite 0.5s;
}

.w-60 {
  width: 60%;
}

.w-90 {
  width: 90%;
}

.w-45 {
  width: 45%;
}

.w-75 {
  width: 75%;
}

.w-55 {
  width: 55%;
}

@keyframes shimmer {

  0%,
  100% {
    opacity: 0.6;
  }

  50% {
    opacity: 1;
  }
}

/* Project grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}

.project-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.project-card-links {
  display: flex;
  gap: 14px;
}

.project-card-links a {
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.2s, transform 0.2s;
}

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

.project-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-1);
}

.project-card p {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.65;
  flex: 1;
}

.project-card:hover {
  transform: translateY(-5px);
}

.project-card--more {
  display: flex;
  align-items: center;
  justify-content: center;
  border-style: dashed;
}

.more-projects-inner {
  text-align: center;
}

.more-icon {
  font-size: 2.5rem;
  color: var(--text-3);
  display: block;
  margin-bottom: 8px;
}

.more-projects-inner .mono {
  color: var(--text-2);
  font-size: 0.85rem;
  margin-bottom: 14px;
}

/* ─── Experience ─────────────────────────────────────────────── */
#experience {
  background: var(--ink-1);
}

.exp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.exp-col-title {
  color: var(--text-2);
  font-size: 0.82rem;
  margin-bottom: 28px;
  letter-spacing: 0.08em;
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(to bottom, var(--cyan), var(--violet), transparent);
  border-radius: 1px;
}

.timeline-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding-bottom: 28px;
}

.timeline-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ink-1);
  border: 2px solid var(--cyan);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  margin-top: 18px;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
  transition: background 0.3s, box-shadow 0.3s;
}

.timeline-item:hover .timeline-dot {
  background: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.timeline-content {
  flex: 1;
  padding: 18px 20px;
}

.timeline-date {
  font-size: 0.75rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}

.timeline-content h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 0.87rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 12px;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Achievements */
.achievement-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.achievement-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px;
  transition: transform 0.25s var(--ease-spring);
}

.achievement-card:hover {
  transform: translateX(5px);
}

.ach-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.ach-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 4px;
}

.ach-text p {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.55;
}

/* ─── Contact ────────────────────────────────────────────────── */
#contact {
  background: var(--ink-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.contact-form-card {
  padding: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.form-group label {
  font-size: 0.75rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.form-group input,
.form-group textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-bd);
  border-radius: 10px;
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text-1);
  outline: none;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-3);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  background: rgba(0, 212, 255, 0.04);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--error);
}

.field-error {
  font-size: 0.75rem;
  color: var(--error);
  font-family: var(--font-mono);
  min-height: 1em;
}

.form-success {
  text-align: center;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.success-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  border: 2px solid var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--success);
}

.form-success p {
  color: var(--text-2);
}

/* Social links */
.contact-links {
  padding: 24px;
  margin-bottom: 16px;
}

.contact-find-me {
  color: var(--text-2);
  font-size: 0.78rem;
  margin-bottom: 20px;
  letter-spacing: 0.08em;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  margin-bottom: 4px;
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateX(4px);
}

.social-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}

.github-bg {
  background: #24292e;
}

.linkedin-bg {
  background: #0077b5;
}

.twitter-bg {
  background: #000;
}

.email-bg {
  background: linear-gradient(135deg, var(--purple), var(--cyan));
}

.social-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
}

.social-handle {
  font-size: 0.75rem;
  color: var(--text-2);
}

.social-arrow {
  margin-left: auto;
  color: var(--text-3);
  flex-shrink: 0;
  transition: transform 0.2s, color 0.2s;
}

.social-link:hover .social-arrow {
  transform: translateX(4px);
  color: var(--cyan);
}

.availability-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
}

.avail-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s ease-in-out infinite;
}

.avail-label {
  font-size: 0.72rem;
  color: var(--cyan);
  margin-bottom: 3px;
  letter-spacing: 0.06em;
}

.avail-text {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.4;
}

/* ─── Footer ─────────────────────────────────────────────────── */
#footer {
  background: var(--ink-1);
  border-top: 1px solid var(--glass-bd);
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-logo {
  font-size: 1rem;
  color: var(--text-1);
  letter-spacing: 0.05em;
}

.footer-copy,
.footer-tech {
  font-size: 0.75rem;
  color: var(--text-3);
}

.footer-tech {
  color: var(--violet);
  opacity: 0.6;
}

/* ─── Back to top ────────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 500;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-bd);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, background 0.2s, color 0.2s;
  backdrop-filter: blur(10px);
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

#back-to-top:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-3px);
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu.open {
    display: block;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .exp-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .project-featured-inner {
    grid-template-columns: 1fr;
  }

  .project-featured-visual {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 0;
  }

  .stat-item {
    padding: 0 20px;
  }
}

@media (max-width: 600px) {
  .hero-name {
    letter-spacing: -2px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

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

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

  .contribution-grid {
    grid-template-rows: repeat(7, 10px);
    gap: 2px;
  }

  .contrib-cell {
    width: 10px;
    height: 10px;
  }
}

/* ─── Reduced motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 1 !important;
    transform: none !important;
  }
}