/* ════════════════════════════════════════════════════════════════
   Gökay Özdemir | Personal Portfolio — style.css
   Palette: Deep Navy + Electric Blue/Cyan accent + Gold highlights
   ════════════════════════════════════════════════════════════════ */

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

:root {
  /* Dark theme tokens */
  --bg-primary:       #0a0e1a;
  --bg-secondary:     #0f1628;
  --bg-card:          #131c36;
  --bg-card-hover:    #1a2545;
  --bg-glass:         rgba(19, 28, 54, 0.7);

  --text-primary:     #e8edf8;
  --text-secondary:   #8b9ac4;
  --text-muted:       #5a6a9a;

  --accent-primary:   #4f8ef7;
  --accent-secondary: #00d4ff;
  --accent-gold:      #f5c518;
  --accent-purple:    #a855f7;
  --accent-teal:      #14b8a6;

  --gradient-main:    linear-gradient(135deg, #4f8ef7 0%, #00d4ff 100%);
  --gradient-card:    linear-gradient(135deg, rgba(79,142,247,0.12) 0%, rgba(0,212,255,0.06) 100%);

  --border-subtle:    rgba(79, 142, 247, 0.15);
  --border-card:      rgba(79, 142, 247, 0.2);

  --shadow-card:      0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow:      0 0 40px rgba(79, 142, 247, 0.2);

  --nav-h:            72px;
  --radius-sm:        8px;
  --radius-md:        14px;
  --radius-lg:        20px;
  --radius-xl:        28px;

  --font-main:       'Outfit', sans-serif;
  --font-code:       'Inter', monospace;

  --transition-fast:  0.2s ease;
  --transition-med:   0.35s ease;
  --transition-slow:  0.6s ease;
}

/* Light mode overrides */
body.light-mode {
  --bg-primary:     #f0f4ff;
  --bg-secondary:   #e4eaf8;
  --bg-card:        #ffffff;
  --bg-card-hover:  #f5f8ff;
  --bg-glass:       rgba(255,255,255,0.8);

  --text-primary:   #1a233a;
  --text-secondary: #4a5a80;
  --text-muted:     #7a8ab0;

  --border-subtle:  rgba(79, 142, 247, 0.2);
  --border-card:    rgba(79, 142, 247, 0.25);

  --shadow-card:    0 4px 24px rgba(79, 142, 247, 0.12);
  --shadow-glow:    0 0 32px rgba(79, 142, 247, 0.15);
}

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

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

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

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }

/* ── Utilities ────────────────────────────────────────────────── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.25);
  border-radius: 100px;
  padding: 6px 18px;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79, 142, 247, 0.4);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(79, 142, 247, 0.55);
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
}
.btn-outline:hover {
  background: rgba(79, 142, 247, 0.1);
  transform: translateY(-3px);
}

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

/* ── Scroll Reveal ────────────────────────────────────────────── */
.reveal, .fade-in-up, .fade-in-right {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-right { transform: translateX(60px); }
.reveal.visible, .fade-in-up.visible, .fade-in-right.visible {
  opacity: 1;
  transform: none;
}

/* ══════════════════════════════════════════════════════════════
   NAVIGATION
   ══════════════════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition-med), box-shadow var(--transition-med);
}

#navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 800;
  font-family: var(--font-code);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.8; }

.logo-accent { color: var(--accent-secondary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(79, 142, 247, 0.1);
}
.nav-link.active { color: var(--accent-primary); }

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(79, 142, 247, 0.1);
  color: var(--accent-primary);
  font-size: 1rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover { background: rgba(79, 142, 247, 0.2); transform: rotate(15deg); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 25px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-med);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ══════════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════════ */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  animation: float 8s ease-in-out infinite;
}
.shape-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #4f8ef7 0%, transparent 70%);
  top: -200px; left: -200px;
  animation-delay: 0s;
}
.shape-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #00d4ff 0%, transparent 70%);
  top: 30%; right: -100px;
  animation-delay: 3s;
}
.shape-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, #a855f7 0%, transparent 70%);
  bottom: 10%; left: 30%;
  animation-delay: 5s;
}
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.3);
  border-radius: 100px;
  padding: 8px 18px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-secondary);
  margin-bottom: 20px;
}
.hero-badge i { font-size: 0.75rem; }

.hero-name {
  font-size: clamp(2.8rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.hero-title {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.chip:hover { border-color: var(--accent-primary); color: var(--text-primary); }
.chip i { color: var(--accent-primary); font-size: 0.75rem; }

.hero-summary {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Avatar */
.hero-image-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-avatar-ring {
  width: 320px; height: 320px;
  border-radius: 50%;
  padding: 6px;
  background: var(--gradient-main);
  box-shadow: var(--shadow-glow), 0 0 80px rgba(79,142,247,0.3);
  position: relative;
  animation: pulse-ring 4s ease-in-out infinite;
}
@keyframes pulse-ring {
  0%, 100% { box-shadow: var(--shadow-glow), 0 0 80px rgba(79,142,247,0.3); }
  50% { box-shadow: 0 0 60px rgba(79,142,247,0.35), 0 0 120px rgba(0,212,255,0.25); }
}

.hero-avatar {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-card);
}

.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
  animation: float-card 6s ease-in-out infinite;
}
.floating-card i { color: var(--accent-primary); font-size: 1rem; }
.card-1 { top: 10%; left: -10%; animation-delay: 0s; }
.card-2 { bottom: 20%; left: -15%; animation-delay: 2s; }
.card-3 { top: 25%; right: -15%; animation-delay: 4s; }
@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.scroll-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: blink 1.5s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.3; transform: translateY(6px); }
}

/* ══════════════════════════════════════════════════════════════
   ABOUT
   ══════════════════════════════════════════════════════════════ */
.about-section {
  background: var(--bg-secondary);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 1.02rem;
  line-height: 1.85;
}
.about-text strong { color: var(--text-primary); }

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition-med);
}
.stat-card:hover { border-color: var(--accent-primary); transform: translateY(-4px); }
.stat-number {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.about-info-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
.about-info-card:hover { border-color: var(--accent-primary); transform: translateX(4px); }
.info-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(79, 142, 247, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}
.about-info-card div strong { display: block; font-size: 0.78rem; color: var(--text-muted); margin-bottom: 2px; }
.about-info-card div span { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; }

/* ══════════════════════════════════════════════════════════════
   SKILLS
   ══════════════════════════════════════════════════════════════ */
.skills-section { background: var(--bg-primary); }

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-med);
}
.skill-category-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}
.skill-cat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  border: 1px solid var(--border-card);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary);
  font-size: 1.2rem;
}
.skill-cat-header h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-list { display: flex; flex-direction: column; gap: 20px; }

.skill-item {}
.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.skill-name { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.skill-pct { font-size: 0.82rem; font-weight: 700; color: var(--accent-primary); }

.skill-bar-track {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 100px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-main);
  border-radius: 100px;
  transition: width 1.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.skill-bar-fill::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 4px;
  background: rgba(255,255,255,0.6);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(255,255,255,0.5);
}

/* Competency tags */
.competency-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}
.tag i { color: var(--accent-teal); font-size: 0.75rem; }
.tag:hover { border-color: var(--accent-primary); color: var(--text-primary); transform: translateY(-2px); }

/* ══════════════════════════════════════════════════════════════
   EXPERIENCE TIMELINE
   ══════════════════════════════════════════════════════════════ */
.experience-section { background: var(--bg-secondary); }

.timeline {
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 20px;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 6px var(--bg-secondary), 0 0 20px rgba(79,142,247,0.4);
  z-index: 1;
}
.marker-icon { color: #fff; font-size: 0.85rem; }

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  transition: all var(--transition-med);
  position: relative;
}
.timeline-card::before {
  content: '';
  position: absolute;
  left: -10px; top: 22px;
  width: 18px; height: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-right: none;
  border-top: none;
  transform: rotate(45deg);
}
.timeline-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: translateX(6px);
}

.timeline-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.job-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.company-name {
  font-size: 0.88rem;
  color: var(--accent-primary);
  font-weight: 600;
}

.job-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
}
.date-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(79, 142, 247, 0.08);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.date-badge i { color: var(--accent-primary); font-size: 0.7rem; }
.current-badge {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.3);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-teal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.job-duties {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.job-duties li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}
.job-duties li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 1rem;
}

/* ══════════════════════════════════════════════════════════════
   EDUCATION
   ══════════════════════════════════════════════════════════════ */
.education-section { background: var(--bg-primary); }

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

.edu-column-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.edu-column-header i {
  font-size: 1.3rem;
  color: var(--accent-primary);
}
.edu-column-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.edu-card {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 16px;
  transition: all var(--transition-fast);
}
.edu-card:hover { border-color: var(--accent-primary); transform: translateX(4px); }
.edu-icon-wrap {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(79, 142, 247, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}
.edu-content h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.edu-degree { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 8px; }
.edu-years {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.edu-years i { color: var(--accent-primary); }

/* Cert cards */
.cert-card {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 14px;
  transition: all var(--transition-fast);
}
.cert-card:hover { border-color: var(--accent-primary); transform: translateX(4px); }

.cert-badge {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.cert-gold { background: rgba(245, 197, 24, 0.12); color: var(--accent-gold); border: 1px solid rgba(245, 197, 24, 0.25); }
.cert-blue { background: rgba(79, 142, 247, 0.12); color: var(--accent-primary); border: 1px solid rgba(79, 142, 247, 0.25); }
.cert-purple { background: rgba(168, 85, 247, 0.12); color: var(--accent-purple); border: 1px solid rgba(168, 85, 247, 0.25); }
.cert-teal { background: rgba(20, 184, 166, 0.12); color: var(--accent-teal); border: 1px solid rgba(20, 184, 166, 0.25); }

.cert-content h4 { font-size: 0.92rem; font-weight: 700; color: var(--text-primary); margin-bottom: 5px; }
.cert-issuer {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 5px;
}
.cert-issuer i { color: var(--accent-primary); font-size: 0.72rem; }
.cert-date {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.cert-date i { color: var(--accent-primary); font-size: 0.7rem; }

/* ══════════════════════════════════════════════════════════════
   CONTACT
   ══════════════════════════════════════════════════════════════ */
.contact-section { background: var(--bg-secondary); }

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

.contact-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.contact-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
  font-size: 1.1rem;
}
.contact-item div strong {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}
.contact-item div a, .contact-item div span {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}
.contact-item div a:hover { color: var(--accent-primary); }

.contact-availability {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 12px 20px;
  background: rgba(20, 184, 166, 0.06);
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--accent-teal);
  font-weight: 600;
}
.availability-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.3);
  animation: pulse-availability 2s ease-in-out infinite;
}
@keyframes pulse-availability {
  0%, 100% { box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(20, 184, 166, 0.1); }
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 36px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}
.form-group:last-child { margin-bottom: 0; }

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
  resize: vertical;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.1);
}

.form-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--accent-teal);
  text-align: center;
  min-height: 1.2em;
}

/* ══════════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 32px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  font-family: var(--font-code);
  color: var(--text-primary);
}
.footer-tagline { font-size: 0.88rem; color: var(--text-muted); }

.footer-links { display: flex; gap: 14px; }
.footer-icon-link {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}
.footer-icon-link:hover {
  background: rgba(79, 142, 247, 0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-3px);
}

.footer-copy { font-size: 0.8rem; color: var(--text-muted); }

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 20px rgba(79, 142, 247, 0.4);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-med);
  pointer-events: none;
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}
.back-to-top:hover { transform: translateY(-4px); }

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-container { grid-template-columns: 1fr; text-align: center; }
  .hero-content { order: 2; }
  .hero-image-wrap { order: 1; }
  .hero-chips { justify-content: center; }
  .hero-cta { justify-content: center; }
  .hero-summary { margin: 0 auto 36px; }
  .hero-avatar-ring { width: 240px; height: 240px; }
  .floating-card { display: none; }

  .about-grid { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 70px 0; }
  .section-header { margin-bottom: 40px; }
  .about-stats { grid-template-columns: repeat(3, 1fr); }
  .about-cards { grid-template-columns: 1fr; }
  .timeline { padding-left: 28px; }
  .timeline-marker { left: -28px; width: 28px; height: 28px; }
  .timeline::before { left: 11px; }
  .timeline-card-header { flex-direction: column; }
  .job-meta { align-items: flex-start; }
  .contact-form { padding: 24px; }
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 280px; height: 100vh;
    background: var(--bg-card);
    border-left: 1px solid var(--border-card);
    flex-direction: column;
    justify-content: center;
    padding: 80px 32px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform var(--transition-med);
    backdrop-filter: blur(20px);
    z-index: 1000;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { font-size: 1.1rem; padding: 12px 16px; }
}

@media (max-width: 400px) {
  .about-stats { grid-template-columns: 1fr; }
}