:root{
  --bg:#0b0d12;
  --fg:#e8ecf1;
  --muted:#a3afbf;
  --brand:#5b8cff;
  --card:#121622;
  --chip:#1b2230;
  --line:#222a3b;
  --accent:#00e0a5;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
  --maxw:1200px;
  --gradient:linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent:linear-gradient(135deg, #00e0a5 0%, #00b894 100%);
  --glass:rgba(255,255,255,0.1);
  --glass-border:rgba(255,255,255,0.2);
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#f6f8fb;
    --fg:#10141a;
    --muted:#5b6676;
    --brand:#3056d3;
    --card:#ffffff;
    --chip:#e9eef8;
    --line:#e3eaf4;
    --accent:#0bb381;
    --shadow:0 8px 22px rgba(16,20,26,.08);
    --glass:rgba(255,255,255,0.8);
    --glass-border:rgba(0,0,0,0.1);
  }
}

html[data-theme="light"]{
  --bg:#f6f8fb;
  --fg:#10141a;
  --muted:#5b6676;
  --brand:#3056d3;
  --card:#ffffff;
  --chip:#e9eef8;
  --line:#e3eaf4;
  --accent:#0bb381;
  --shadow:0 8px 22px rgba(16,20,26,.08);
  --glass:rgba(255,255,255,0.8);
  --glass-border:rgba(0,0,0,0.1);
}

html[data-theme="dark"]{
  --bg:#0b0d12;
  --fg:#e8ecf1;
  --muted:#a3afbf;
  --brand:#5b8cff;
  --card:#121622;
  --chip:#1b2230;
  --line:#222a3b;
  --accent:#00e0a5;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --glass:rgba(255,255,255,0.1);
  --glass-border:rgba(255,255,255,0.2);
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  scroll-behavior: smooth;
}

/* Loading Animation */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease-out;
}

.loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:24px 20px 80px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease-out 0.5s forwards;
  width: 100%;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav{
  position:sticky;
  top:0;
  z-index:20;
  backdrop-filter:saturate(160%) blur(20px);
  background:var(--glass);
  border-bottom:1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.nav:hover {
  background: var(--glass);
  backdrop-filter: saturate(180%) blur(25px);
}

.nav-in{
  max-width:var(--maxw);
  margin:0 auto;
  padding:15px 20px;
  display:flex;
  align-items:center;
  gap:16px;
  justify-content:space-between;
}

.nav a.brand{
  font-weight:900;
  text-decoration:none;
  color:var(--fg);
  letter-spacing:.3px;
  font-size: 1.2em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.nav a.brand:hover {
  transform: scale(1.05);
}

.nav .links{
  display:flex;
  gap:14px;
  align-items:center;
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border-radius:999px;
  background:var(--chip);
  color:var(--fg);
  text-decoration:none;
  border:1px solid var(--line);
  font-weight:600;
  font-size:14px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.chip::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s;
}

.chip:hover::before {
  left: 100%;
}

.chip:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 25px rgba(0,0,0,0.2);
  border-color: var(--brand);
}

.btn{cursor:pointer;user-select:none}

header.hero{
  margin-top:20px;
  padding:48px;
  border-radius:24px;
  border:1px solid var(--line);
  background:linear-gradient(135deg,var(--card),transparent 60%),radial-gradient(900px 300px at 20% -10%,rgba(91,140,255,.18),transparent 60%);
  box-shadow:var(--shadow);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

header.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient);
  opacity: 0.05;
  z-index: -1;
}

header.hero:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

    .hero-content {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 30px;
      align-items: center;
    }

    .hero-text {
      width: 100%;
    }
    
    .hero-image {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .profile-photo {
      position: relative;
      width: 140px !important;
      height: 140px !important;
      border-radius: 50%;
      overflow: hidden;
      border: 2px solid var(--brand);
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      transition: all 0.3s ease;
      background: var(--chip);
      flex-shrink: 0;
    }

.profile-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(91,140,255,0.4);
}

        .profile-photo img {
      width: 100% !important;
      height: 100% !important;
      object-fit: cover !important;
      object-position: center !important;
      opacity: 1 !important;
      transition: opacity 0.3s ease;
      display: block !important;
      visibility: visible !important;
      z-index: 1;
      max-width: none !important;
      max-height: none !important;
    }
    
    .profile-photo img.loaded {
      opacity: 1;
    }
    
    .profile-photo img.error {
      opacity: 0;
    }

    .photo-placeholder {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 100%;
      color: var(--muted);
      text-align: center;
      padding: 10px;
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: var(--chip);
      z-index: 10;
      transition: all 0.3s ease;
    }
    
    .photo-placeholder.hidden {
      display: none !important;
      visibility: hidden !important;
      opacity: 0 !important;
    }

    .photo-placeholder span {
      font-size: 20px;
      margin-bottom: 4px;
      opacity: 0.7;
    }
    
    .photo-placeholder p {
      font-size: 8px;
      font-weight: 500;
      margin: 0;
      opacity: 0.8;
    }

.photo-placeholder.hidden {
  display: none;
}

h1{
  font-size:clamp(32px,5vw,52px);
  line-height:1.1;
  margin:8px 0 10px;
  letter-spacing:.2px;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle{
  color:var(--muted);
  font-weight:500;
  font-size: 1.1em;
}

.badges{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:20px;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border-radius:999px;
  background:var(--chip);
  color:var(--fg);
  font-weight:600;
  font-size:13px;
  border:1px solid var(--line);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tag::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.tag:hover::before {
  opacity: 0.1;
}

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

    .cta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:20px;
    }

    .btn-prim{
      background:var(--gradient);
      color:#fff;
      border:none;
      border-radius:10px;
      padding:10px 16px;
      font-weight:600;
      font-size:14px;
      text-decoration:none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }

.btn-prim::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-prim:hover::before {
  left: 100%;
}

    .btn-prim:hover{
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(91,140,255,0.25);
    }

    .btn-ghost{
      background:var(--chip);
      color:var(--fg);
      border:1px solid var(--line);
      border-radius:10px;
      padding:10px 16px;
      font-weight:600;
      font-size:14px;
      text-decoration:none;
      transition: all 0.3s ease;
    }

    .btn-ghost:hover{
      transform: translateY(-1px);
      background: var(--card);
      border-color: var(--brand);
      box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    }

    .grid {
      display: grid;
      grid-template-columns: 2fr 1fr; /* sol 2 kat, sağ 1 kat */
      gap: 28px;
      margin-top: 32px;
      width: 100% !important;
      max-width: 100% !important;
    }
    

section.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

section.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

section.card:hover::before {
  transform: scaleX(1);
}

section.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

h2{
  margin:32px 0 16px;
  font-size:18px;
  letter-spacing:.3px;
  text-transform:uppercase;
  color:var(--muted);
  font-weight: 800;
  position: relative;
}

h2:first-child {
  margin-top: 0;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--gradient);
  border-radius: 1px;
}

.item{
  margin-bottom:24px;
  padding: 16px;
  border-radius: 12px;
  background: var(--chip);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

.item:hover {
  transform: translateX(5px);
  border-color: var(--brand);
  background: var(--card);
}

.item h3{
  margin:0 0 8px;
  font-size:16px;
  font-weight: 700;
  color: var(--fg);
}

.meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  color:var(--muted);
  font-size:13px;
  margin-bottom: 8px;
}

.bullet{
  margin:8px 0 0;
  padding-left:18px;
}

.bullet li{
  margin:8px 0;
  position: relative;
}

.bullet li::marker {
  color: var(--accent);
  font-weight: bold;
}

.skills{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.pill{
  background:var(--chip);
  border:1px solid var(--line);
  color:var(--fg);
  padding:10px 16px;
  border-radius:12px;
  font-weight:600;
  font-size:13px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.pill::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.pill:hover::before {
  opacity: 0.1;
}

.pill:hover{
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 5px 15px rgba(0,224,165,0.2);
}

.two-col{
  columns:2;
  column-gap:20px;
}

.one-col{
  columns:1;
}

.projects .proj{
  display:grid;
  grid-template-columns:1fr auto;
  gap:12px;
  margin-bottom:18px;
  padding: 16px;
  border-radius: 12px;
  background: var(--chip);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

.projects .proj:hover {
  transform: translateX(5px);
  border-color: var(--brand);
  background: var(--card);
}

.projects a{
  color:var(--fg);
  text-decoration: none;
}

.language-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.language-item:last-child {
  border-bottom: none;
}

.language-name {
  font-weight: 600;
}

.language-level {
  color: var(--muted);
  font-size: 13px;
}

footer{
  margin-top:32px;
  color:var(--muted);
  font-size:13px;
  text-align:center;
  padding: 20px;
  border-top: 1px solid var(--line);
}

/* Scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

    @media (max-width:900px){
      .grid{
        grid-template-columns:1fr;
        width:100% !important;
        max-width:100% !important;
      }
      .two-col{columns:1}
      .nav-in {
        flex-direction: column;
        gap: 12px;
      }
      .nav .links {
        flex-wrap: wrap;
        justify-content: center;
      }
      header.hero {
        padding: 32px 24px;
      }
      .hero-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
      }
      .profile-photo {
        width: 90px !important;
        height: 90px !important;
      }
      .cta {
        justify-content: center;
      }
    }

    @media (max-width: 768px) {
      .profile-photo {
        width: 80px !important;
        height: 80px !important;
      }
      header.hero {
        padding: 24px 20px;
      }
      .hero-content {
        gap: 20px;
      }
    }

    @media (max-width: 480px) {
      .profile-photo {
        width: 70px !important;
        height: 70px !important;
      }
      header.hero {
        padding: 20px 16px;
      }
      .hero-content {
        gap: 16px;
      }
      .cta {
        flex-direction: column;
        align-items: center;
      }
      .cta a {
        width: 100%;
        text-align: center;
      }
    }

    @media (max-width: 360px) {
      .profile-photo {
        width: 60px !important;
        height: 60px !important;
      }
    }

@media print{
  body{background:#fff;color:#111}
  .nav,.cta,.btn,.chip{display:none!important}
  header.hero,section.card{box-shadow:none}
  a{color:#111;text-decoration:none}
  .wrap{padding:0}
}

/* QR Generator Styles */
.qr-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.form-group label {
  font-weight: 600;
  color: var(--fg);
  font-size: 14px;
}

.form-group input,
.form-group select {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  font-size: 14px;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input[type="color"] {
  width: 60px;
  height: 40px;
  padding: 4px;
  cursor: pointer;
}

.form-group small {
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.qr-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 24px;
  background: var(--chip);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

#qrCanvas {
  display: block;
  margin: 0 auto;
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  max-width: 100%;
  height: auto;
}

.qr-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.example-item {
  padding: 20px;
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.example-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--brand);
}

.example-item h3 {
  margin: 0 0 8px 0;
  font-size: 16px;
  color: var(--fg);
}

.example-item p {
  margin: 0 0 12px 0;
  color: var(--muted);
  font-size: 14px;
}

.example-item code {
  background: var(--card);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--brand);
  border: 1px solid var(--line);
  display: block;
  word-break: break-all;
}

/* Responsive QR Generator */
@media (max-width: 768px) {
  .qr-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .qr-actions .btn {
    width: 100%;
  }
  
  .examples-grid {
    grid-template-columns: 1fr;
  }
  
  #qrCanvas {
    min-height: 250px;
    padding: 15px;
  }
}

@media (max-width: 480px) {
  .qr-result {
    padding: 16px;
  }
  
  #qrCanvas {
    min-height: 200px;
    padding: 10px;
  }
  
  .form-group input,
  .form-group select {
    padding: 10px 12px;
  }
}

/* Terminal Modu Renkleri */
body.terminal-mode {
    background-color: #0c0c0c !important; /* Simsiyah arkaplan */
    color: #00ff00 !important; /* Matris yeşili yazı */
    font-family: 'Courier New', Courier, monospace !important;
}

body.terminal-mode a {
    color: #00cc00 !important;
    text-decoration: underline;
}

/* Tüm kutuları şeffaf ve yeşil çerçeveli yap */
body.terminal-mode div, body.terminal-mode section, body.terminal-mode header {
    background: transparent !important;
    border: 1px solid #00ff00 !important;
    box-shadow: none !important;
}

/* Resimleri siyah-beyaz (Matrix tarzı) yap */
body.terminal-mode img {
    filter: grayscale(100%) brightness(80%) sepia(50%) hue-rotate(100deg) saturate(500%);
}