/* Temel renk değişkenleri */
:root {
    --color-bg: #0f172a;
    --color-bg-alt: #162137;
    --color-surface: #1e293b;
    --color-surface-alt: #283548;
    --color-border: #334155;
    --color-text: #f1f5f9;
    --color-text-soft: #cbd5e1;
    --color-primary: #3b82f6;
    --color-primary-accent: #60a5fa;
    --color-gradient-start: #3b82f6;
    --color-gradient-end: #10b981;
    --color-focus: #f59e0b;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --transition: 0.3s cubic-bezier(.4,0,.2,1);
    --font-base: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    --max-width: 1200px;
}

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

body {
    font-family: var(--font-base);
    background: radial-gradient(circle at 25% 10%, var(--color-bg-alt), var(--color-bg));
    background-attachment: fixed;
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    line-height: 1.55;
    overflow-x: hidden;
}

/* Modern glassmorphism effects */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

.container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59,130,246,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(16,185,129,0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
    width: auto;
    height: auto;
    padding: 8px 12px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    z-index: 10000;
}

/* Navigasyon kaldırıldı */

section {padding:80px 0 40px;position:relative;}
section:first-of-type{padding-top:60px;}
section h2{font-size:2.2rem;margin-bottom:36px;font-weight:700;letter-spacing:.5px;display:inline-block;position:relative;color:var(--color-text);background:linear-gradient(90deg,var(--color-text),var(--color-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
section h2:after{content:'';position:absolute;left:0;bottom:-12px;width:64px;height:4px;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));border-radius:2px;}

/* Yetenekler */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px;margin-top:12px;}
.skill-block{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;position:relative;overflow:hidden;transition:var(--transition);} 
.skill-block:before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,var(--color-gradient-start) 0%,var(--color-gradient-end) 100%);opacity:0;transition:var(--transition);mix-blend-mode:overlay;}
.skill-block:hover:before{opacity:.08;} 
.skill-block h3{margin:0 0 14px;font-size:1rem;letter-spacing:.5px;text-transform:uppercase;font-weight:600;color:var(--color-text-soft);} 
.badges{display:flex;flex-wrap:wrap;gap:8px;}
.badges.small{margin-top:4px;}
.badge{background:linear-gradient(90deg,var(--color-surface-alt),var(--color-surface));border:1px solid var(--color-border);padding:6px 10px;font-size:.65rem;font-weight:600;letter-spacing:.5px;text-transform:uppercase;border-radius:999px;color:var(--color-text-soft);display:inline-flex;align-items:center;gap:4px;position:relative;overflow:hidden;}
.badge:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));opacity:0;transition:var(--transition);mix-blend-mode:overlay;}
.badge:hover:after{opacity:.35;}

/* Zaman çizelgesi */
.timeline{position:relative;margin:12px 0 8px;padding-left:20px;}
.timeline:before{content:'';position:absolute;left:6px;top:4px;bottom:4px;width:2px;background:linear-gradient(var(--color-gradient-start),var(--color-gradient-end));opacity:.6;border-radius:2px;}
.timeline-item{position:relative;padding:0 0 28px 28px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item:before{content:'';position:absolute;left:0;top:4px;width:14px;height:14px;border-radius:50%;background:var(--color-surface);border:3px solid var(--color-gradient-start);box-shadow:0 0 0 4px var(--color-bg);} 
.timeline-item .time{font-size:.65rem;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--color-primary);margin-bottom:6px;} 
.timeline-item .content h3{font-size:1.05rem;margin:0 0 10px;font-weight:600;color:var(--color-text);} 
.timeline-item .content h3 span{font-size:.8rem;font-weight:500;color:var(--color-text-soft);} 
.timeline-item ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px;} 
.timeline-item ul li{font-size:.82rem;line-height:1.45;color:var(--color-text-soft);}

/* Eğitim ve deneyim bölümü ayrım */
.experience-section .timeline-item:before{border-color:var(--color-gradient-end);} 
.education-section .timeline-item:before{border-color:var(--color-gradient-start);} 

@media (max-width:600px){
    .timeline{padding-left:14px;}
    .timeline:before{left:4px;}
    .timeline-item{padding:0 0 24px 22px;}
    .timeline-item:before{left:-2px;width:12px;height:12px;}
}

/* Kart bileşenleri */
#about,.project-card,.certificate-card,.contact-section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:40px;margin-bottom:40px;box-shadow:var(--shadow-sm);position:relative;transition:var(--transition);backdrop-filter:blur(16px);}
#about:hover,.project-card:hover,.certificate-card:hover,.contact-section:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px);}

/* Hakkımda bölümü modern layout */
#about{display:flex;flex-direction:row;align-items:flex-start;gap:40px;text-align:left;background:linear-gradient(135deg, var(--color-surface) 0%, rgba(59,130,246,0.03) 100%);border:1px solid rgba(59,130,246,0.1);}
#about .profile-image{flex-shrink:0;position:relative;}
#about img{width:200px;height:200px;border-radius:50%;border:3px solid rgba(59,130,246,0.2);object-fit:cover;box-shadow:0 8px 32px rgba(0,0,0,0.3);transition:var(--transition);margin:0;} 
#about img:hover{transform:scale(1.05);box-shadow:0 12px 40px rgba(59,130,246,0.15);}
#about .content{flex:1;min-width:0;}
#about h2{margin:0 0 20px 0;font-size:2.2rem;background:linear-gradient(90deg,var(--color-text),var(--color-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
#about p{max-width:none;margin:0;font-size:1.1rem;color:var(--color-text-soft);line-height:1.8;text-align:justify;}

/* Responsive düzen */
@media (max-width:768px){
  #about{flex-direction:column;align-items:center;text-align:center;gap:24px;}
  #about img{width:160px;height:160px;}
  #about h2{font-size:1.8rem;}
}

.projects{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:32px;margin-top:8px;}
.project-card{padding:32px;display:flex;flex-direction:column;min-height:100%;background:linear-gradient(135deg, var(--color-surface) 0%, rgba(59,130,246,0.02) 100%);border:1px solid rgba(59,130,246,0.08);backdrop-filter:blur(20px);position:relative;overflow:hidden;}
.project-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));opacity:0;transition:var(--transition);}
.project-card:hover::before{opacity:1;}
.project-card img{width:100%;height:240px;object-fit:cover;border-radius:var(--radius-md);margin-bottom:20px;transition:var(--transition);}
.project-card:hover img{transform:scale(1.02);}
.project-card h3{font-size:1.3rem;margin:0 0 16px;color:var(--color-text);position:relative;padding-bottom:12px;}
.project-card h3:after{content:'';position:absolute;left:0;bottom:0;width:48px;height:3px;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));border-radius:2px;transition:var(--transition);} 
.project-card:hover h3:after{width:84px;}
.project-card p{color:var(--color-text-soft);font-size:.95rem;line-height:1.6;margin-bottom:20px;}
.project-content{flex-grow:1;}

.progress-wrapper{margin-top:auto;padding-top:12px;}
.progress-container{background:var(--color-surface-alt);border-radius:999px;overflow:hidden;height:8px;position:relative;box-shadow:inset 0 1px 2px rgba(0,0,0,0.08);} 
.progress-bar{height:100%;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));transition:width 1s ease-in-out;}
.project-status{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:.8rem;color:var(--color-text-soft);font-weight:500;}

/* (Kullanılmayan eski bölümler sadeleştirildi) */

/* Skills Section */
.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.skill-item {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Education & Certificates */
.education, .certificates {
    margin: 30px 0;
}

.education-item, .certificate-item {
    background: var(--card-bg);
    padding: 20px;
    margin: 10px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Contact Information */
.contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 20px 0;
}

.contact-item {
    background: var(--card-bg);
    padding: 10px 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Bölüm özel stilleri */
#projects{position:relative;}
#projects:before{content:'< / >';position:absolute;top:8px;right:16px;font-size:1rem;color:var(--color-primary);opacity:.25;font-family:'Consolas',monospace;pointer-events:none;}

/* Sertifikalar */
.certificate-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:8px;}
.certificate-card{padding:30px;display:flex;flex-direction:column;min-height:300px;}
.certificate-card h3{margin:24px 0 12px;font-size:1.1rem;color:var(--color-text);padding-bottom:10px;position:relative;}
.certificate-card h3:after{content:'';position:absolute;left:0;bottom:0;width:40px;height:3px;background:linear-gradient(90deg,var(--color-gradient-start),var(--color-gradient-end));border-radius:2px;transition:var(--transition);} 
.certificate-card:hover h3:after{width:72px;}
.certificate-info{color:var(--color-text-soft);font-size:.85rem;line-height:1.5;flex-grow:1;}
.certificate-meta{display:flex;justify-content:space-between;margin-top:auto;padding-top:14px;font-size:.7rem;color:var(--color-text-soft);text-transform:uppercase;letter-spacing:.5px;font-weight:600;}
.certificate-type{position:absolute;top:18px;right:18px;font-size:1rem;color:var(--color-primary);display:flex;align-items:center;gap:6px;}
.certificate-type span{background:var(--color-surface-alt);padding:4px 8px;border-radius:999px;font-size:.6rem;letter-spacing:.5px;color:var(--color-text-soft);} 

/* İletişim */
.contact-section{margin:40px 0;padding:48px;} 
.contact-grid{display:flex;flex-direction:column;gap:32px;}
.primary-contacts,.social-contacts{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;}
.contact-item{background:var(--color-surface-alt);border:1px solid var(--color-border);padding:12px 18px;border-radius:var(--radius-md);display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--color-text-soft);font-size:.9rem;font-weight:500;transition:var(--transition);} 
.contact-item a{color:inherit;text-decoration:none;}
.contact-item img{width:22px;height:22px;filter:brightness(0) saturate(100%) invert(20%) sepia(6%) saturate(1407%) hue-rotate(169deg) brightness(92%) contrast(88%);transition:var(--transition);} 
.contact-item:hover{background:var(--color-primary);color:#fff;transform:translateY(-3px);} 
.contact-item:hover img{filter:invert(100%);} 
.divider{height:1px;width:100%;background:linear-gradient(90deg,transparent,var(--color-primary),transparent);opacity:.4;}

/* Footer */
.footer{display:flex;align-items:center;justify-content:center;padding:40px 0 60px;text-align:center;}
.footer-content{display:flex;flex-direction:column;align-items:center;gap:8px;}
.footer img{width:110px;height:auto;filter:drop-shadow(0 4px 10px rgba(0,0,0,0.2));}
.footer p{font-size:.75rem;letter-spacing:1px;color:var(--color-text-soft);text-transform:uppercase;font-weight:600;}

/* Animasyon & yardımcı sınıflar */
@keyframes fadeInUp {0%{opacity:0;transform:translateY(12px);}100%{opacity:1;transform:translateY(0);}}
section,#about,.project-card,.certificate-card,.contact-section{animation:fadeInUp .6s ease both;}

/* Responsive */
@media (max-width:900px){.main-nav ul{gap:12px;}section{padding:56px 0 28px;} .project-card img{height:200px;} .nav-wrapper{flex-wrap:wrap;} }
@media (max-width:600px){.site-title{font-size:1.05rem;} .projects{grid-template-columns:1fr;} #about,.project-card,.certificate-card,.contact-section{padding:28px;} .certificate-grid{grid-template-columns:1fr;} .contact-section{padding:40px 28px;} }

/* Scrollbar (Webkit) */
*::-webkit-scrollbar{width:10px;}*::-webkit-scrollbar-track{background:var(--color-bg-alt);}*::-webkit-scrollbar-thumb{background:linear-gradient(var(--color-gradient-start),var(--color-gradient-end));border-radius:20px;}*::-webkit-scrollbar-thumb:hover{filter:brightness(.9);}

/* Dark mode uyumları otomatik değişkenlerde */