/* ==========================================================================
   AUTHENTIC DEVELOPER PORTFOLIO - STYLESHEET
   Personality: Hacker / Systems Engineer, High Polish, Dynamic Animations
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS VARIABLES & THEMES
   -------------------------------------------------------------------------- */
:root {
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);

  /* Primary Accent: Electric Cyan / Blue */
  --accent: #2563eb;
  --accent-cyan: #06b6d4;
  --accent-glow: rgba(37, 99, 235, 0.28);
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);

  --accent-purple: #9333ea;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-quick: 0.16s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-main: #080b11;
  --bg-card: #0e131f;
  --bg-card-sub: #141b2b;
  --bg-header: rgba(8, 11, 17, 0.85);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-focus: var(--accent);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --grid-line: rgba(255, 255, 255, 0.025);

  --term-header: #121826;
  --term-screen: #0a0e17;

  --chip-bg: rgba(255, 255, 255, 0.04);
  --chip-border: rgba(255, 255, 255, 0.1);

  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 16px 36px rgba(0, 0, 0, 0.6);
}

/* Light Theme */
[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-sub: #f1f5f9;
  --bg-header: rgba(248, 250, 252, 0.85);

  --border-subtle: rgba(226, 232, 240, 0.85);
  --border-strong: #cbd5e1;
  --border-focus: var(--accent);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --grid-line: rgba(15, 23, 42, 0.035);

  --term-header: #1e293b;
  --term-screen: #0f172a;

  --chip-bg: #f8fafc;
  --chip-border: #e2e8f0;

  --shadow-card: 0 4px 18px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 16px 32px rgba(15, 23, 42, 0.1);
}

/* --------------------------------------------------------------------------
   2. GLOBAL FOUNDATIONS & BACKGROUND GRID
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Engineering Blueprint Background Grid */
.bg-grid-pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -2;
  background-image: 
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Mouse Follow Cursor Glow */
.cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  filter: blur(40px);
}

/* Custom Interactive Cursor (Desktop Only) */
.custom-cursor-dot,
.custom-cursor-outline {
  pointer-events: none;
  position: fixed;
  top: 0;
  left: 0;
  border-radius: 50%;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.2s ease, transform 0.15s ease-out;
}

.custom-cursor-dot {
  width: 7px;
  height: 7px;
  background-color: var(--accent);
}

.custom-cursor-outline {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--accent);
  opacity: 0.5;
  transition: width 0.2s, height 0.2s, border-color 0.2s, transform 0.1s ease-out;
}

body.cursor-hover .custom-cursor-outline {
  width: 50px;
  height: 50px;
  border-color: var(--accent-cyan);
  opacity: 0.8;
  background-color: rgba(6, 182, 212, 0.08);
}

@media (pointer: coarse) {
  .custom-cursor-dot,
  .custom-cursor-outline {
    display: none;
  }
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

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

/* Reveal On Scroll Animation Class */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1), transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 3D Tilt Card Effect */
.tilt-card {
  transform-style: preserve-3d;
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
  will-change: transform;
}

/* Section Header Typography */
.section-header {
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.section-heading {
  font-size: clamp(2rem, 3.2vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.5px;
}

.section-separator {
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
  margin-top: 0.8rem;
  margin-bottom: 0.8rem;
  border-radius: var(--radius-full);
}

.section-subtext {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
}

/* --------------------------------------------------------------------------
   3. NAVIGATION BAR
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--bg-header);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.4rem;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: var(--radius-xs);
  background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
  color: #ffffff;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.logo-text {
  font-family: var(--font-display);
  letter-spacing: -0.3px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.3rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-quick);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-quick);
}

.nav-social-btn:hover {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-quick);
}

.theme-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

[data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: inline-block; color: #f59e0b; }
[data-theme="light"] .moon-icon { display: inline-block; color: #2563eb; }
[data-theme="light"] .sun-icon { display: none; }

.btn-nav-cta {
  background: var(--accent);
  color: #ffffff;
  padding: 0.45rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
}

.btn-nav-cta:hover {
  background: #1d4ed8;
  color: #ffffff;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 1.5rem;
  height: 1.1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: 0.4rem;
}

.nav-toggle .bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-smooth);
}

.nav-toggle.active .bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.active .bar:nth-child(2) { opacity: 0; }
.nav-toggle.active .bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   4. HERO SECTION
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: calc(100vh - 4.4rem);
  display: flex;
  align-items: center;
  padding: 3.5rem 0 4.5rem;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3.5rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 1.6rem;
}

.status-pill .pill-text::before {
  content: "❯";
  color: var(--accent-emerald);
  font-weight: 700;
  margin-right: 0.55rem;
}

.hero-profile-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.4rem;
  margin-bottom: 0.8rem;
}

.hero-avatar-frame {
  position: relative;
  width: 192px;
  height: 192px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
  box-shadow: 0 4px 20px var(--accent-glow);
  flex-shrink: 0;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.hero-avatar-frame:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 28px var(--accent-cyan-glow);
}

.profile-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 12%; /* Crop half to show upper body/face cleanly */
  border-radius: 50%;
  background: var(--bg-card);
}

.avatar-status-badge {
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #10b981;
  border: 2px solid var(--bg-main);
  box-shadow: 0 0 8px #10b981;
}

.hero-name {
  font-size: clamp(2.4rem, 4.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -1.2px;
  margin-bottom: 0.3rem;
}

.highlight-name {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-dynamic-subtitle {
  font-size: clamp(1.2rem, 2.2vw, 1.7rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.4rem;
  min-height: 2.4rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.sub-prefix {
  color: var(--text-muted);
  margin-right: 0.45rem;
}

.typing-target {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-weight: 700;
}

.caret-blink {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  animation: blink-caret 0.9s infinite;
  margin-left: 2px;
}

@keyframes blink-caret {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.hero-bio {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 2rem;
  max-width: 580px;
}

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

/* Stats Ribbon */
.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin-bottom: 2.2rem;
}

.stat-badge {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1.1rem;
  box-shadow: var(--shadow-card);
}

.stat-badge:hover {
  border-color: var(--accent-cyan);
}

.badge-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
}

.badge-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.78rem 1.4rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-quick);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #1d4ed8);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

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

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

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

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

/* Terminal Shell */
.terminal-shell {
  background: var(--term-screen);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.terminal-topbar {
  background: var(--term-header);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.shell-buttons {
  display: flex;
  gap: 6px;
}

.shell-btn {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.btn-red { background: #ef4444; }
.btn-amber { background: #f59e0b; }
.btn-green { background: #10b981; }

.shell-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #94a3b8;
}

.shell-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  color: #cbd5e1;
}

.terminal-screen {
  padding: 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: #e2e8f0;
}

.prompt-user { color: #10b981; }
.prompt-dir { color: #38bdf8; }
.term-input-cmd { color: #f8fafc; font-weight: 600; }
.term-comment { color: #64748b; font-style: italic; margin-bottom: 0.4rem; }

.term-output-block {
  margin: 0.6rem 0 1rem;
}

.indent-1 { padding-left: 1.2rem; }
.indent-2 { padding-left: 2.4rem; }

.kwd { color: #f43f5e; }
.ident { color: #38bdf8; }
.prop { color: #a5b4fc; }
.str { color: #86efac; }
.num { color: #fca5a5; }

.term-footer-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.term-cursor-active {
  color: #38bdf8;
}

.term-blinker {
  animation: blink-caret 1s infinite;
  color: #10b981;
}

/* --------------------------------------------------------------------------
   5. ABOUT SECTION
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 2.2rem;
}

.about-card-primary {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.4rem;
  box-shadow: var(--shadow-card);
}

.about-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.7rem;
  background: rgba(6, 182, 212, 0.08);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
}

.about-card-primary h3 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  line-height: 1.35;
}

.about-card-primary p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 1.2rem;
}

.about-card-primary p:last-child {
  margin-bottom: 0;
}

.about-details-column {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.detail-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  display: flex;
  gap: 1.1rem;
  box-shadow: var(--shadow-card);
}

.detail-panel:hover {
  border-color: var(--accent-cyan);
}

.detail-icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius-xs);
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.detail-panel h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.detail-panel p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   6. PROJECTS SECTION
   -------------------------------------------------------------------------- */
.projects-container {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

.project-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.4rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.project-box:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-hover);
}

.project-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.project-category-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.28rem 0.75rem;
  border-radius: var(--radius-xs);
}

.tag-cyan { background: rgba(6, 182, 212, 0.12); color: #06b6d4; border: 1px solid rgba(6, 182, 212, 0.25); }
.tag-blue { background: rgba(37, 99, 235, 0.12); color: #3b82f6; border: 1px solid rgba(37, 99, 235, 0.25); }
.tag-purple { background: rgba(147, 51, 234, 0.12); color: #a855f7; border: 1px solid rgba(147, 51, 234, 0.25); }
.tag-emerald { background: rgba(16, 185, 129, 0.12); color: #10b981; border: 1px solid rgba(16, 185, 129, 0.25); }

.project-repo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.project-repo-link:hover {
  color: var(--accent-cyan);
}

.external-arrow {
  font-size: 0.72rem;
}

.project-title {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}

.project-summary {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.4rem;
}

.project-key-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-bottom: 1.6rem;
}

.bullet-row {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.bullet-arrow {
  color: var(--accent-cyan);
  font-weight: 700;
  margin-top: 0.1rem;
}

.bullet-row strong {
  color: var(--text-primary);
}

.project-tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1.6rem;
}

.project-tech-badges span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
}

.btn-project-link {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  font-size: 0.88rem;
  padding: 0.55rem 1.2rem;
}

.btn-project-link:hover {
  background: var(--accent-cyan);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   7. STACK & SKILLS SECTION
   -------------------------------------------------------------------------- */
.stack-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.6rem;
}

.stack-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-card);
}

.stack-card:hover {
  border-color: var(--accent-cyan);
}

.stack-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
}

.stack-icon {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--radius-xs);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.stack-card-header h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.stack-items-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  transition: all var(--transition-quick);
}

.tech-chip:hover {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   8. ACADEMICS & ACCOLADES SECTION
   -------------------------------------------------------------------------- */
.credentials-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.column-subtitle {
  font-size: 1.35rem;
  font-weight: 750;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.8rem;
}

.column-subtitle i {
  color: var(--accent-cyan);
}

/* Education Tree */
.education-tree {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  position: relative;
  padding-left: 1.4rem;
}

.education-tree::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 5px;
  width: 2px;
  background: var(--border-subtle);
}

.tree-node {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
  position: relative;
}

.tree-bullet {
  position: absolute;
  top: 1.6rem;
  left: -1.65rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 3px solid var(--bg-main);
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tree-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.badge-grade {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-xs);
  background: rgba(37, 99, 235, 0.15);
  color: #3b82f6;
}

.badge-grade-distinction {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.tree-degree {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.tree-school {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 0.6rem;
}

.tree-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Accolades List */
.accolades-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.accolade-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  box-shadow: var(--shadow-card);
}

.accolade-card:hover {
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.accolade-icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.icon-cyan { background: rgba(6, 182, 212, 0.14); color: #06b6d4; }
.icon-amber { background: rgba(245, 158, 11, 0.14); color: #f59e0b; }
.icon-purple { background: rgba(147, 51, 234, 0.14); color: #a855f7; }
.icon-emerald { background: rgba(16, 185, 129, 0.14); color: #10b981; }

.accolade-meta {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.accolade-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.accolade-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   9. CONTACT SECTION
   -------------------------------------------------------------------------- */
.contact-shell {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.8rem;
  gap: 3rem;
  box-shadow: var(--shadow-card);
}

.contact-profile-header {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 1.4rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.contact-avatar-circle {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  padding: 2.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
  box-shadow: 0 4px 18px var(--accent-glow);
  flex-shrink: 0;
  overflow: hidden;
}

.contact-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 12%; /* Crop half upper body/face */
  border-radius: 50%;
  background: var(--bg-card);
}

.contact-profile-meta h3 {
  font-size: 1.25rem;
  font-weight: 750;
  margin-bottom: 0.2rem;
}

.contact-role-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.contact-left p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.method-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  color: inherit;
  transition: transform var(--transition-quick);
}

.method-row:hover {
  transform: translateX(4px);
}

.method-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-xs);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.method-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.method-val {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-primary);
}

.social-links-bar {
  display: flex;
  gap: 0.75rem;
}

.social-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-xs);
  background: var(--bg-card-sub);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.1rem;
  transition: all var(--transition-quick);
}

.social-box:hover {
  background: var(--accent-cyan);
  color: #ffffff;
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Contact Form */
.direct-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.input-block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.input-block label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
}

.input-block input,
.input-block textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--bg-card-sub);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.94rem;
  outline: none;
  transition: all var(--transition-quick);
}

.input-block input:focus,
.input-block textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

.btn-submit {
  width: 100%;
}

.form-status {
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

/* --------------------------------------------------------------------------
   10. FOOTER & BACK TO TOP
   -------------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0 2rem;
  background: var(--bg-main);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.8rem;
}

.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

.footer-links-wrap {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}

.footer-links-wrap a {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.footer-links-wrap a:hover {
  color: var(--accent-cyan);
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: var(--radius-xs);
  background: var(--accent);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-cyan);
  transform: translateY(-3px);
}

/* --------------------------------------------------------------------------
   11. RESPONSIVENESS & ADAPTIVE LAYOUT
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 3rem;
  }

  .credentials-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .contact-shell {
    grid-template-columns: 1fr;
    padding: 2.2rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }

  .nav-toggle {
    display: flex;
  }

  .btn-nav-cta {
    display: none;
  }

  .nav-menu {
    position: fixed;
    top: 4.4rem;
    left: -100%;
    width: 100%;
    height: calc(100vh - 4.4rem);
    background: var(--bg-main);
    padding: 2.2rem 1.6rem;
    transition: left var(--transition-smooth);
    overflow-y: auto;
    border-top: 1px solid var(--border-subtle);
  }

  .nav-menu.open {
    left: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .nav-link {
    font-size: 1.15rem;
  }

  .stats-ribbon {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 1.4rem;
  }

  .footer-links-wrap {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .stats-ribbon {
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .project-box {
    padding: 1.4rem;
  }

  .contact-shell {
    padding: 1.4rem;
  }
}