/* ==========================================================================
   MUHAMMED EREN AYDIN - 4/4'LÜK MODERN DESIGN SYSTEM
   Theme: Obsidian Deep Cosmic & Cyber Glassmorphism
   Fonts: Plus Jakarta Sans & JetBrains Mono
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* --- Root CSS Variables --- */
:root {
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Colors */
  --bg-primary: #07080d;
  --bg-secondary: #0c0e17;
  --bg-card: rgba(14, 18, 30, 0.68);
  --bg-card-hover: rgba(22, 28, 46, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-strong: rgba(255, 255, 255, 0.07);

  /* Accents */
  --accent-cyan: #00f2fe;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #6366f1 100%);
  --grad-accent: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --grad-glow: radial-gradient(circle at center, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  --grad-card-border: linear-gradient(135deg, rgba(255,255,255,0.14) 0%, rgba(255,255,255,0.02) 100%);
  --grad-card-border-active: linear-gradient(135deg, #00f2fe 0%, #6366f1 50%, #a855f7 100%);

  /* Text colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;

  /* Borders & Shadows */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-neon: 0 0 25px rgba(99, 102, 241, 0.3);
  --shadow-cyan: 0 0 25px rgba(0, 242, 254, 0.25);

  /* Dimensions & Transitions */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Global Reset & Base Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  padding-bottom: 80px;
}

::selection {
  background: rgba(99, 102, 241, 0.35);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-indigo);
}

/* --- Ambient Background Lighting --- */
.ambient-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.28;
  animation: floatOrb 20s infinite alternate ease-in-out;
}

.glow-orb-1 {
  top: -10%;
  left: 15%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #6366f1 0%, rgba(99, 102, 241, 0) 70%);
}

.glow-orb-2 {
  top: 40%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #00f2fe 0%, rgba(0, 242, 254, 0) 70%);
  animation-duration: 25s;
  animation-delay: -5s;
}

.glow-orb-3 {
  bottom: 5%;
  left: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #a855f7 0%, rgba(168, 85, 247, 0) 70%);
  animation-duration: 22s;
  animation-delay: -10s;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, -40px) scale(1.1); }
  100% { transform: translate(-40px, 50px) scale(0.95); }
}

/* --- Container & Layout --- */
.site-container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* --- Floating Pill Navigation Bar --- */
.floating-nav-wrapper {
  position: fixed;
  top: 24px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  z-index: 100;
  pointer-events: none;
  padding: 0 20px;
}

.floating-nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 18, 30, 0.78);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 6px 10px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 0, 0, 0.3);
  transition: var(--transition-base);
}

.floating-nav:hover {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(99, 102, 241, 0.2);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  text-decoration: none;
  font-family: var(--font-mono);
  letter-spacing: -0.5px;
}

.nav-logo .logo-accent {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
}

.nav-item a:hover {
  color: var(--text-primary);
  background: var(--bg-glass-strong);
}

.nav-item a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.25) 0%, rgba(0, 242, 254, 0.25) 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}

.nav-btn-connect {
  margin-left: 6px;
  padding: 8px 18px !important;
  background: var(--grad-primary) !important;
  color: #05070f !important;
  font-weight: 700 !important;
  border: none !important;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.nav-btn-connect:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.5) !important;
}

/* --- Hero Section --- */
.hero-section {
  padding-top: 140px;
  padding-bottom: 70px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.live-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.15);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  opacity: 0.5;
  animation: pulseDot 2s infinite ease-out;
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.4); opacity: 0; }
}

/* Avatar Frame */
.hero-avatar-container {
  position: relative;
  width: 148px;
  height: 148px;
  margin-bottom: 28px;
}

.avatar-ring-glow {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: var(--grad-primary);
  animation: rotateGrad 10s linear infinite;
  filter: blur(1px);
}

.avatar-img-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border: 3px solid var(--bg-primary);
  z-index: 1;
}

.hero-profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.hero-avatar-container:hover .hero-profile-img {
  transform: scale(1.08);
}

.avatar-chip {
  position: absolute;
  bottom: 0px;
  right: -8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  color: var(--accent-cyan);
  padding: 5px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  z-index: 2;
  box-shadow: var(--shadow-md);
  font-family: var(--font-mono);
}

@keyframes rotateGrad {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 16px;
  max-width: 900px;
}

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

.hero-role-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-bottom: 22px;
}

.role-tag-symbol {
  color: var(--accent-cyan);
  font-weight: 700;
}

.typing-cursor {
  display: inline-block;
  color: var(--accent-cyan);
  font-weight: 700;
  animation: blinkCursor 0.8s infinite;
}

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

.hero-description {
  max-width: 720px;
  font-size: 1.12rem;
  color: var(--text-secondary);
  margin-bottom: 34px;
  line-height: 1.75;
}

.hero-description strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 36px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--grad-primary);
  color: #050711;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  text-decoration: none;
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.35);
  transition: var(--transition-base);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 242, 254, 0.55);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  color: #fff;
}

.social-pills-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition-base);
  backdrop-filter: blur(10px);
}

.social-pill:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.social-pill.github:hover {
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}

.social-pill.linkedin:hover {
  background: rgba(10, 102, 194, 0.25);
  border-color: #0a66c2;
  box-shadow: 0 4px 20px rgba(10, 102, 194, 0.35);
}

.social-pill.gmail:hover {
  background: rgba(234, 67, 53, 0.2);
  border-color: #ea4335;
  box-shadow: 0 4px 20px rgba(234, 67, 53, 0.3);
}

.social-pill.instagram:hover {
  background: rgba(225, 48, 108, 0.2);
  border-color: #e1306c;
  box-shadow: 0 4px 20px rgba(225, 48, 108, 0.3);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 920px;
  margin-top: 50px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  backdrop-filter: blur(16px);
  transition: var(--transition-base);
}

.metric-card:hover {
  border-color: var(--accent-indigo);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.metric-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Section Structure --- */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  background: rgba(0, 242, 254, 0.08);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

/* ==========================================================================
   BIOGRAPHY & PROMINENT DEVELOPER PROFILE CARD
   ========================================================================== */
.bio-layout-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 36px;
  align-items: start;
}

.bio-portrait-card {
  background: linear-gradient(145deg, rgba(16, 21, 38, 0.85) 0%, rgba(10, 13, 24, 0.95) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  backdrop-filter: blur(20px);
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 242, 254, 0.1);
  overflow: hidden;
  text-align: center;
}

.bio-portrait-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-primary);
}

.bio-photo-frame {
  position: relative;
  width: 170px;
  height: 170px;
  margin: 0 auto 20px auto;
}

.bio-photo-glow {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: var(--grad-primary);
  filter: blur(3px);
  opacity: 0.8;
  animation: rotateGrad 12s linear infinite;
}

.bio-photo-inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--bg-secondary);
  z-index: 1;
}

.bio-photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bio-dev-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.bio-dev-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.bio-quick-facts {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 16px 0;
  margin-bottom: 20px;
}

.bio-fact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.bio-fact-item i {
  color: var(--accent-indigo);
  width: 16px;
  text-align: center;
}

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

/* Punchy Term Pills in Bio */
.punchy-terms-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.punchy-term-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  color: #a5b4fc;
}

/* Narrative Story Column */
.bio-story-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 38px;
  backdrop-filter: blur(20px);
}

.bio-story-heading {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.bio-story-heading i {
  color: var(--accent-cyan);
}

.bio-story-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 20px;
}

.bio-story-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Engineering Highlights Callout */
.bio-callout-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 28px 0;
}

.bio-callout-box h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.bio-callout-box p {
  font-size: 0.95rem;
  color: #c7d2fe;
  line-height: 1.65;
  margin: 0;
}

/* Timeline Milestones */
.bio-milestones-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 20px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.bio-timeline {
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  padding-left: 24px;
}

.bio-timeline::before {
  content: '';
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-indigo), transparent);
}

.timeline-step {
  position: relative;
}

.timeline-step::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline-step h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.timeline-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Interactive Projects Hub --- */
.projects-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.filter-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.filter-btn.active {
  background: var(--grad-primary);
  color: #060814;
  font-weight: 700;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.35);
}

.projects-search-box {
  max-width: 440px;
  margin: 0 auto 40px auto;
  position: relative;
}

.projects-search-box input {
  width: 100%;
  background: rgba(14, 18, 30, 0.75);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 12px 20px 12px 46px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition-base);
  backdrop-filter: blur(16px);
}

.projects-search-box input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.25);
}

.projects-search-box i {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.95rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 28px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-lg), 0 0 28px rgba(99, 102, 241, 0.2);
}

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

.project-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
}

.project-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.project-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.35;
}

.project-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.tech-tag:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--accent-cyan);
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.btn-architecture-modal {
  background: transparent;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  transition: var(--transition-fast);
}

.btn-architecture-modal:hover {
  color: #fff;
  text-decoration: underline;
}

.project-links-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-link-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.icon-link-btn:hover {
  background: var(--grad-primary);
  color: #070913;
  border-color: transparent;
  transform: translateY(-2px);
}

.private-repo-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.03);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
}

/* --- Tech Stack & Architecture Skills Section --- */
.skills-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  backdrop-filter: blur(16px);
  transition: var(--transition-base);
}

.skill-category-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.skill-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.skill-cat-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.skill-cat-icon.backend {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}

.skill-cat-icon.ai {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
}

.skill-cat-icon.frontend {
  background: rgba(0, 242, 254, 0.15);
  color: #38bdf8;
}

.skill-cat-icon.tools {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.skill-category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skills-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-item-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  padding: 6px 13px;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.skill-item-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.skill-item-pill i {
  color: var(--accent-cyan);
  font-size: 0.85rem;
}

/* --- Interactive Blog & AI Lab Preview --- */
.blog-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  transition: var(--transition-base);
}

.blog-card:hover {
  border-color: rgba(0, 242, 254, 0.35);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.blog-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.blog-tag {
  color: var(--accent-cyan);
  font-weight: 600;
}

.blog-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.blog-read-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-cyan);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.blog-read-more:hover {
  gap: 12px;
  color: #fff;
}

/* --- Contact & Newsletter Section --- */
.contact-section-card {
  background: linear-gradient(135deg, rgba(14, 18, 30, 0.85) 0%, rgba(20, 24, 40, 0.7) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.contact-section-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.contact-info-col h3 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.contact-info-col p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.7;
}

.contact-direct-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.direct-link-item {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.direct-link-item:hover {
  color: var(--accent-cyan);
  transform: translateX(4px);
}

.direct-link-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.newsletter-form-container {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
}

.newsletter-form-container h4 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.newsletter-form-container p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.form-group-input {
  position: relative;
  margin-bottom: 14px;
}

.form-group-input input {
  width: 100%;
  background: rgba(14, 18, 30, 0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 18px 14px 44px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-group-input input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.25);
}

.form-group-input i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.btn-submit-form {
  width: 100%;
  padding: 13px;
  background: var(--grad-primary);
  color: #060814;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-base);
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
}

.btn-submit-form:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.5);
}

.form-alert-message {
  margin-top: 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: none;
}

.form-alert-message.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

.form-alert-message.error {
  display: block;
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
}

.site-footer {
  margin-top: 80px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* --- Architecture Modal Dialog --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(99, 102, 241, 0.2);
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 32px;
  position: relative;
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.modal-project-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  padding-right: 40px;
}

.modal-pattern-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.modal-section-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 18px 0 10px 0;
}

.modal-layers-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-layers-list li {
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--accent-indigo);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.modal-highlights-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-highlights-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.modal-highlights-list li i {
  color: var(--accent-emerald);
}

.modal-actions-row {
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --- Responsive Media Queries --- */
@media (max-width: 992px) {
  .bio-layout-grid {
    grid-template-columns: 1fr;
  }
  .bio-portrait-card {
    position: relative;
    top: 0;
    max-width: 420px;
    margin: 0 auto;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .floating-nav-wrapper {
    top: auto;
    bottom: 16px;
    padding: 0 12px;
  }
  .floating-nav {
    padding: 5px 8px;
    gap: 2px;
  }
  .nav-logo {
    display: none;
  }
  .nav-item a span {
    display: none;
  }
  .nav-item a {
    padding: 10px 14px;
    font-size: 1.1rem;
  }
  .nav-btn-connect {
    padding: 8px 14px !important;
  }
  .hero-section {
    padding-top: 80px;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .bio-story-card {
    padding: 24px;
  }
  .site-footer {
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding-bottom: 50px;
  }
}