/* ==========================================================================
   SAMAR KUMAR — Portfolio Design System
   Minimal · Classic · Dark · Warm "Grinny" Aesthetic
   ========================================================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #242424;
  --bg-elevated: #161616;
  --card-bg: #161616;
  --card-bg-hover: #1c1c1c;

  --text-primary: #f5f5f0;
  --text-secondary: #a0a0a0;
  --text-muted: #6b6b6b;

  --accent: #e8453c;
  --accent-hover: #d63a32;
  --accent-soft: rgba(232, 69, 60, 0.1);
  --accent-glow: rgba(232, 69, 60, 0.06);

  --border: #2a2a2a;
  --border-subtle: #1f1f1f;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --font-size-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --font-size-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --font-size-lg: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --font-size-xl: clamp(1.3rem, 1.1rem + 1vw, 1.75rem);
  --font-size-2xl: clamp(1.8rem, 1.4rem + 2vw, 2.5rem);
  --font-size-3xl: clamp(2.2rem, 1.6rem + 3vw, 3.5rem);
  --font-size-display: clamp(2.8rem, 2rem + 4vw, 4.5rem);

  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --line-height-relaxed: 1.8;
  --letter-spacing-tight: -0.03em;
  --letter-spacing-normal: -0.01em;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-section: clamp(1.2rem, 1rem + 1.5vw, 2.2rem);

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --container-padding: clamp(1.25rem, 1rem + 2vw, 3rem);

  /* Borders & Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}


/* ==========================================================================
   RESET & BASE
   ========================================================================== */

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

html {
  scrollbar-width: thin;
  scrollbar-color: var(--bg-tertiary) var(--bg-primary);
}

html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overflow: clip;
}

.lenis.lenis-prevent {
  overflow: hidden;
}

.lenis.lenis-scrolling iframe {
  pointer-events: none;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  opacity: 0.045; /* Subtle noise density */
  pointer-events: none;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Custom Scrollbar — Webkit */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}


/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-section) 0;
}

.section-header {
  margin-bottom: var(--space-3xl);
  display: flex;
  flex-direction: column;
  align-items: flex-start; /* Default: Left aligned */
  text-align: left;
}

.section-header-right {
  align-items: flex-end;
  text-align: right;
}

.section-header-right .section-subtitle {
  margin-left: auto;
  margin-right: 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #818cf8;
  margin-bottom: var(--space-sm);
}

.section-label::before {
  display: none;
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-top: var(--space-md);
  max-width: 600px;
  line-height: var(--line-height-relaxed);
}

.accent-text {
  color: var(--accent);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}


/* ==========================================================================
   SCROLL ANIMATIONS
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }


/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.navbar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 1100px;
  z-index: 1000;
  padding: 10px 24px;
  background: rgba(15, 17, 26, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(8, 9, 14, 0.85);
  border-color: rgba(255, 255, 255, 0.1);
  padding: 7px 24px;
  top: 15px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  max-width: 100%;
  width: 100%;
}

@media (max-width: 576px) {
  .navbar {
    width: calc(100% - 24px);
    top: 10px;
    padding: 10px 16px;
  }
  .navbar.scrolled {
    top: 10px;
    padding: 10px 16px;
  }
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  text-transform: lowercase;
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.85;
}

.nav-logo .logo-icon {
  color: #a2e635; /* Lime Green matching Ghost button */
}

.nav-links-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  margin-left: var(--space-3xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #a2e635;
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-search-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs);
  transition: color var(--transition-fast);
}

.nav-search-btn:hover {
  color: var(--text-primary);
}

.nav-secondary-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.nav-cta {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: #08090e; /* Dark text for contrast */
  background: #a2e635; /* Vibrant lime green matching Ghost button */
  padding: 8px 20px;
  border-radius: 9999px; /* Rounded pill shape */
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: #b2f146;
  transform: translateY(-1px);
}

/* Mobile Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  cursor: pointer;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 15, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-mobile a:hover {
  color: var(--text-primary);
}


/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 150px 0 15px 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2xl);
  font-family: var(--font-family);
  letter-spacing: var(--letter-spacing-tight);
}

.hero-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3xl);
  max-width: var(--max-width-narrow);
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo-wrapper {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-photo-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
}

/* Placeholder initial when no photo */
.hero-photo-placeholder {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #1e1b4b; /* Dark text for contrast */
}

.hero-text {
  flex: 1;
}

.hero-author-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: var(--letter-spacing-normal);
}

.hero-author-bio p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.hero-author-bio strong {
  color: var(--text-primary);
}

.hero-author-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.hero-inline-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(255, 255, 255, 0.15);
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.hero-inline-link:hover {
  color: #a2e635; /* Lime green hover matching headers */
  text-decoration-color: #a2e635;
}

.hero-inline-link svg {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.hero-inline-link:hover svg {
  color: #a2e635;
}

.hero-actions {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(232, 69, 60, 0.25);
}

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

.btn-secondary:hover {
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  animation: float 2.5s ease-in-out infinite;
}

.hero-scroll-indicator .scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
}

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


/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */

.about-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.about-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.about-text h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.about-text p {
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
}

.about-descriptors {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.descriptor-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(232, 69, 60, 0.15);
}

.descriptor-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}


#skills {
  padding-top: 15px;
}

.skills-section-header {
  margin-bottom: var(--space-3xl);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.skills-flex-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-md);
  max-width: 960px;
  margin: 0 0 0 auto;
}

.skill-badge {
  background: #161616;
  border: 1.5px dashed rgba(255, 255, 255, 0.12); /* Dashed border style matching reference */
  border-radius: var(--radius-md); /* 12px rounded corner */
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: border-style var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
  cursor: default;
}

.skill-badge:hover {
  border-style: solid;
  border-color: #a2e635; /* Hover states to lime-green solid border */
  background: #1d1d22;
  transform: translateY(-2px);
}

.skill-badge-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.skill-badge-icon svg {
  width: 16px;
  height: 16px;
}

.skill-badge-text {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}


/* ==========================================================================
   CERTIFICATIONS SECTION
   ========================================================================== */

.cert-intro {
  max-width: 700px;
  margin-bottom: var(--space-2xl);
  line-height: var(--line-height-relaxed);
}

.cert-dashboard {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.cert-sidebar {
  background: #111116;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px;
  max-height: 440px;
  overflow-y: auto;
  scrollbar-width: none; /* Hide default scrollbar (Firefox) */
}

.cert-sidebar::-webkit-scrollbar {
  display: none; /* Hide default scrollbar (Chrome/Safari) */
}

.cert-sidebar-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.cert-select-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.cert-select-btn:hover {
  background: #191922;
}

.cert-select-btn.active {
  background: #1d1d28;
  border-left: 3px solid var(--accent); /* subtle indicator bar */
}

.cert-select-num {
  font-family: monospace;
  font-size: var(--font-size-xs);
  color: #8DE000;
  font-weight: 700;
}

.cert-select-name {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Showcase Main Area */
.cert-main-showcase {
  background: #0b0c10;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  min-height: 400px;
  display: flex;
  align-items: center;
}

.cert-split-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-2xl);
  width: 100%;
  align-items: center;
}

/* Overlapping Stack Mockup (Image 2 style) */
.cert-visual-col {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 260px;
  width: 100%;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at center, rgba(232, 69, 60, 0.05) 0%, transparent 70%);
}

.cert-stack-container {
  position: relative;
  width: 210px;
  height: 150px;
  transition: transform var(--transition-slow);
}

.cert-stack-card {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform var(--transition-slow), opacity var(--transition-slow), z-index var(--transition-slow);
}

.cert-stack-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Card Stack Placements */
.cert-stack-main {
  z-index: 3;
  opacity: 1;
  transform: translate(0, 0) scale(1) rotate(0deg);
}

.cert-stack-back-left {
  z-index: 2;
  opacity: 0.65;
  transform: translate(-30px, 10px) scale(0.9) rotate(-7deg);
}

.cert-stack-back-right {
  z-index: 1;
  opacity: 0.45;
  transform: translate(30px, 12px) scale(0.85) rotate(7deg);
}

/* 3D Stack Expansion on Hover */
.cert-stack-container:hover .cert-stack-back-left {
  transform: translate(-50px, -4px) scale(0.92) rotate(-10deg);
  opacity: 0.8;
}

.cert-stack-container:hover .cert-stack-back-right {
  transform: translate(50px, 6px) scale(0.88) rotate(10deg);
  opacity: 0.6;
}

.cert-stack-container:hover .cert-stack-main {
  transform: translateY(-6px) scale(1.02);
}

/* Content Details Column */
.cert-content-col {
  display: flex;
  flex-direction: column;
  align-items: start;
  gap: var(--space-md);
  text-align: left;
}

.cert-badge-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.cert-showcase-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  line-height: var(--line-height-tight);
}

.cert-meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.cert-meta-dot {
  color: var(--text-muted);
}

.cert-meta-value {
  color: var(--text-secondary);
  font-weight: 500;
}

.cert-showcase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: var(--space-xs) 0;
}

.cert-showcase-tag {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  background: #181822;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.cert-showcase-actions {
  margin-top: var(--space-sm);
  display: flex;
  align-items: center;
}

.cert-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.cert-action-btn:hover {
  background: #a2e635; /* Glow green hover */
  color: #000;
  transform: translateY(-1px);
}

.cert-btn-icon {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.cert-action-btn:hover .cert-btn-icon {
  transform: translate(2px, -2px);
}

/* No Credential label styling */
.cert-no-url {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-style: italic;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .cert-dashboard {
    grid-template-columns: 1fr;
  }
  
  .cert-sidebar {
    max-height: 160px;
    overflow-x: auto;
    overflow-y: hidden;
  }
  
  .cert-sidebar-list {
    flex-direction: row;
  }
  
  .cert-select-btn {
    width: auto;
    white-space: nowrap;
  }
}

@media (max-width: 600px) {
  .cert-split-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .cert-visual-col {
    height: 220px;
  }
  
  .cert-stack-container {
    width: 200px;
    height: 145px;
  }
}


/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.project-card {
  background: #0c0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  gap: var(--space-lg);
  align-items: stretch;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.project-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.55);
}

.project-card-image-col {
  width: 170px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.project-card-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.05) 0%, rgba(162, 230, 53, 0.05) 100%);
}

.project-card-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card-image-wrapper img {
  transform: scale(1.04);
}

.project-card-image-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom right, rgba(129, 140, 248, 0.22) 0%, rgba(162, 230, 53, 0.08) 100%);
  mix-blend-mode: overlay;
  pointer-events: none;
}

.project-card-content-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-grow: 1;
  text-align: left;
}

.project-card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.project-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.project-card-links {
  display: flex;
  gap: var(--space-sm);
}

.project-card-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
}

.project-card-links a:hover {
  color: #818cf8; /* purple accent on hover */
}

.project-card-links svg {
  width: 16px;
  height: 16px;
}

.project-card-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-md);
  margin-top: var(--space-xs);
  flex-grow: 1;
}

.project-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.tech-tag {
  padding: 2px 6px;
  font-size: 10px;
  color: var(--text-muted);
  background: #14151b;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-weight: 500;
}


/* ==========================================================================
   JOURNEY & EXPERIENCE SECTION (INTERACTIVE CARD DECK)
   ========================================================================== */

.deck-container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  perspective: 1500px;
}

/* Fanned selector cards deck (Image 3 style) */
.deck-selector-row {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  width: 100%;
  margin: 0 auto;
  position: relative;
  min-height: 300px;
}

.selector-card {
  width: 200px;
  height: 280px;
  border-radius: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-lg);
  margin: 0 -35px; /* Overlap margin */
  position: relative;
  transform-origin: bottom center;
  transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  text-align: left;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
}

/* Overlapping Z-index & fanning positions */
.selector-card:nth-child(1) { transform: rotate(-12deg) translateY(24px) translateX(10px); z-index: 1; }
.selector-card:nth-child(2) { transform: rotate(-6deg) translateY(8px) translateX(5px); z-index: 2; }
.selector-card:nth-child(3) { transform: rotate(0deg) translateY(0px); z-index: 3; }
.selector-card:nth-child(4) { transform: rotate(6deg) translateY(8px) translateX(-5px); z-index: 2; }
.selector-card:nth-child(5) { transform: rotate(12deg) translateY(24px) translateX(-10px); z-index: 1; }

/* Selector card pattern preview */
.selector-card .deck-card-pattern {
  width: 100%;
  height: 100px;
  opacity: 0.85;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.selector-card-body {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
}

.selector-card-label {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
  margin-bottom: 4px;
}

.selector-card-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

/* Hover effects */
.selector-card:hover {
  transform: translateY(-40px) rotate(0deg) scale(1.15) !important;
  z-index: 20 !important;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.75);
}

/* Premium Dark Color Palette for Selector and Detail Cards */
/* Card 1: B.Tech CSE (Deep Slate/Indigo) */
.selector-card[data-index="0"], .deck-detail-card[data-card-index="0"] {
  background-color: #111019;
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #ffffff;
}
.selector-card[data-index="0"] .selector-card-label, .deck-detail-card[data-card-index="0"] .deck-card-label {
  color: #818cf8;
}

/* Card 2: ARC Esports (Deep Charcoal/Amber) */
.selector-card[data-index="1"], .deck-detail-card[data-card-index="1"] {
  background-color: #171310;
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: #ffffff;
}
.selector-card[data-index="1"] .selector-card-label, .deck-detail-card[data-card-index="1"] .deck-card-label {
  color: #fbbf24;
}

/* Card 3: Sami Cleaner (Deep Slate/Cyan) */
.selector-card[data-index="2"], .deck-detail-card[data-card-index="2"] {
  background-color: #0c131d;
  border: 1px solid rgba(14, 165, 233, 0.25);
  color: #ffffff;
}
.selector-card[data-index="2"] .selector-card-label, .deck-detail-card[data-card-index="2"] .deck-card-label {
  color: #38bdf8;
}

/* Card 4: GDG On Campus (Deep Emerald/Mint) */
.selector-card[data-index="3"], .deck-detail-card[data-card-index="3"] {
  background-color: #0e1914;
  border: 1px solid rgba(34, 197, 94, 0.25);
  color: #ffffff;
}
.selector-card[data-index="3"] .selector-card-label, .deck-detail-card[data-card-index="3"] .deck-card-label {
  color: #4ade80;
}

/* Card 5: Hackathon (Deep Ruby/Crimson) */
.selector-card[data-index="4"], .deck-detail-card[data-card-index="4"] {
  background-color: #151212;
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #ffffff;
}
.selector-card[data-index="4"] .selector-card-label, .deck-detail-card[data-card-index="4"] .deck-card-label {
  color: #f87171;
}

/* Modal Overlay (Image 4 popup style) */
.deck-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 12, 0.85); /* Premium dark backdrop overlay */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.deck-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Close button for overlay modal */
.deck-close-btn {
  position: absolute;
  top: 30px;
  right: 30px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #ffffff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 1010;
}

.deck-close-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: rotate(90deg);
}

.deck-close-btn svg {
  width: 20px;
  height: 20px;
}

.deck-modal-content {
  width: 100%;
  max-width: 480px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
}

/* Detail Card shown inside Modal overlay (Image 4 Style) */
.deck-detail-card {
  width: 100%;
  min-height: 520px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: scale(0.85) translateY(40px) rotateX(-15deg);
  transition: opacity 0.5s cubic-bezier(0.165, 0.84, 0.44, 1),
              transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.15);
  display: none;
}

.deck-detail-card.active {
  display: flex;
  opacity: 1;
  transform: scale(1) translateY(0) rotateX(0deg);
}

.deck-detail-card .deck-card-pattern {
  width: 100%;
  height: 140px;
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.deck-detail-card .deck-card-pattern svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Detail card content body */
.deck-card-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.deck-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.deck-card-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.deck-card-period {
  font-size: var(--font-size-xs);
  opacity: 0.7;
  font-weight: 500;
}

.deck-card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  line-height: var(--line-height-tight);
}

.deck-card-org {
  font-size: var(--font-size-sm);
  font-weight: 600;
  opacity: 0.8;
  margin-bottom: var(--space-sm);
}

.deck-card-desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  opacity: 0.85;
  margin-bottom: var(--space-md);
}

.deck-card-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: auto;
}

.deck-skill-tag {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: inherit;
}

/* Mobile responsive fixes */
@media (max-width: 768px) {
  .deck-selector-row {
    min-height: auto;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: var(--space-md) 0;
  }
  
  .selector-card {
    width: calc(50% - 10px);
    height: 220px;
    margin: 0 !important;
    transform: none !important;
  }
  
  .selector-card:nth-child(5) {
    width: 100%;
    height: 180px;
  }

  .selector-card:hover {
    transform: translateY(-8px) scale(1.02) !important;
  }
  
  .deck-close-btn {
    top: 20px;
    right: 20px;
  }
}

@media (max-width: 480px) {
  .selector-card {
    width: 100%;
    height: 180px;
  }
}


/* ==========================================================================
   BEYOND CODE SECTION
   ========================================================================== */

.beyond-split-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.beyond-info-col {
  text-align: left;
}

.beyond-description {
  color: var(--text-secondary);
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.beyond-stack-col {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  position: relative;
}

.beyond-cascade-container {
  position: relative;
  width: 100%;
  max-width: 440px;
  height: 330px;
}

.beyond-cascade-card {
  position: absolute;
  width: 220px;
  height: 150px;
  padding: 20px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform var(--transition-slow), z-index var(--transition-slow), box-shadow var(--transition-slow);
}

/* Card Stagger Positions (Kiff Style) */
.beyond-card-gym {
  top: 0;
  left: 0;
  z-index: 1;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border-left: 3px solid #38bdf8; /* sky blue highlight */
}

.beyond-card-badminton {
  top: 85px;
  left: 110px;
  z-index: 2;
  background: linear-gradient(135deg, #1e1b4b 0%, #0f0a2a 100%);
  border-left: 3px solid #818cf8; /* indigo highlight */
}

.beyond-card-photography {
  top: 170px;
  left: 220px;
  z-index: 3;
  background: linear-gradient(135deg, #1c1917 0%, #0c0a09 100%);
  border-left: 3px solid #fb923c; /* orange highlight */
}

/* Interactive Card Stack Hover Effects */
.beyond-cascade-card:hover {
  z-index: 5;
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.65);
}

.beyond-card-icon {
  font-size: 1.5rem;
  margin-bottom: 10px;
  display: inline-block;
}

.beyond-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.beyond-card-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  line-height: 1.4;
}


/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.contact-info p {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-socials {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.social-link svg {
  width: 18px;
  height: 18px;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
  outline: none;
}

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

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

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-success {
  display: none;
  padding: var(--space-md);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: var(--radius-sm);
  color: #22c55e;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
}

.form-success.show {
  display: block;
}


/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
}

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

.footer-text {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.back-to-top {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-to-top:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}


/* ==========================================================================
   DIVIDER / SECTION SEPARATOR
   ========================================================================== */

.section-divider {
  display: none;
}


/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .startups-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links-wrapper {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  /* Hero */
  .hero-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-xl);
  }

  .hero-author-links {
    align-items: center;
  }

  /* About */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .about-image-wrapper {
    max-width: 260px;
    margin: 0 auto;
  }

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

  /* Certifications */
  .cert-grid {
    grid-template-columns: 1fr;
  }

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

  .project-card {
    flex-direction: column;
    gap: var(--space-md);
  }

  .project-card-image-col {
    width: 100%;
  }

  /* Startups */
  .startups-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-content {
    grid-template-columns: 1fr;
  }

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

  /* Beyond Code */
  .beyond-split-layout {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .beyond-cascade-container {
    height: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .beyond-cascade-card {
    position: static;
    width: 100%;
    height: auto;
  }

  /* Footer */
  .footer .container {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-photo-wrapper {
    width: 120px;
    height: 120px;
  }

  .cert-filters {
    gap: var(--space-xs);
  }
}