/* =========================
   Renk Paleti ve Temel Ayarlar
   ========================= */
:root {
  --bg-dark: #1f2937;
  --bg-light: #f9fafb;
  --accent: #3b82f6;
  --text-main: #111827;
  --text-light: #f9fafb;
  --shadow: 0 2px 16px 0 rgba(31,41,55,0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-main);
  min-height: 100vh;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* =========================
   Navbar
   ========================= */
#navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background: var(--bg-light);
  box-shadow: none;
  z-index: 100;
  transition: box-shadow 0.3s;
}
#navbar.sticky {
  box-shadow: var(--shadow);
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}
.nav-logo {
  font-weight: bold;
  font-size: 1.3rem;
  color: var(--accent);
  letter-spacing: 1px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover {
  color: var(--accent);
}

/* =========================
   Hero Section
   ========================= */
#hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-dark);
  color: var(--text-light);
  overflow: hidden;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}
.hero-content h1 {
  font-size: 2.7rem;
  margin-bottom: 1rem;
  font-weight: 700;
}
.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #d1d5db;
}
.accent-btn {
  background: var(--accent);
  color: var(--text-light);
  border: none;
  padding: 0.8rem 2.2rem;
  border-radius: 32px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px 0 rgba(59,130,246,0.08);
  transition: background 0.2s, transform 0.2s;
}
.accent-btn:hover {
  background: #2563eb;
  transform: translateY(-2px) scale(1.04);
}
.wave {
  display: inline-block;
  animation: wave 1.5s infinite linear alternate;
}
@keyframes wave {
  0% { transform: rotate(0deg); }
  20% { transform: rotate(15deg); }
  40% { transform: rotate(-10deg); }
  60% { transform: rotate(10deg); }
  80% { transform: rotate(-5deg); }
  100% { transform: rotate(0deg); }
}
/* Hero arkaplan blob animasyonu */
.hero-bg-blob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle at 60% 40%, #3b82f6 0%, #1f2937 100%);
  opacity: 0.18;
  filter: blur(60px);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(1.2);
  animation: blobMove 8s infinite alternate ease-in-out;
  z-index: 1;
}
@keyframes blobMove {
  0% { transform: translate(-50%, -50%) scale(1.2); }
  100% { transform: translate(-48%, -52%) scale(1.3); }
}

/* =========================
   Projects Section
   ========================= */
#projects {
  padding: 80px 0 40px 0;
  background: var(--bg-light);
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 2.5rem;
  text-align: center;
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.project-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 2px 16px 0 rgba(31,41,55,0.08);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform 0.18s, box-shadow 0.18s;
  min-height: 180px;
}
.project-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 6px 32px 0 rgba(59,130,246,0.13);
}
.project-card h3 {
  margin: 0 0 0.7rem 0;
  color: var(--accent);
  font-size: 1.2rem;
}
.project-card p {
  margin: 0 0 1.2rem 0;
  color: #374151;
  font-size: 1rem;
}
.project-btn {
  background: none;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 0.5rem 1.2rem;
  border-radius: 24px;
  font-size: 0.98rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.18s, color 0.18s;
}
.project-btn:hover {
  background: var(--accent);
  color: var(--text-light);
}

/* =========================
   Project Slider (Kaydırmalı Resim)
   ========================= */
.project-slider {
  width: 100%;
  position: relative;
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 170px;
}
.slider-images {
  width: 100%;
  display: flex;
  overflow: hidden;
  position: relative;
  justify-content: center;
}
.slider-img {
  width: 100%;
  max-width: 320px;
  height: 170px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 2px 12px 0 rgba(31,41,55,0.07);
  opacity: 0;
  transition: opacity 0.4s, transform 0.4s;
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  pointer-events: none;
}
.slider-img.active {
  opacity: 1;
  position: relative;
  z-index: 2;
  pointer-events: auto;
  transform: scale(1.03);
}
.slider-btn {
  background: rgba(59,130,246,0.12);
  border: none;
  color: var(--accent);
  font-size: 1.7rem;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  margin: 0 0.5rem;
  transition: background 0.18s, color 0.18s;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
}
.slider-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* =========================
   About Section
   ========================= */
#about {
  padding: 80px 0 40px 0;
  background: var(--bg-dark);
  color: var(--text-light);
}
.about-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.about-content p {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #e5e7eb;
}

/* =========================
   Contact Section
   ========================= */
#contact {
  padding: 80px 0 40px 0;
  background: var(--bg-light);
}
.contact-content {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1.5rem;
}
.contact-form input,
.contact-form textarea {
  padding: 0.9rem 1.2rem;
  border-radius: 12px;
  border: 1.5px solid #d1d5db;
  font-size: 1rem;
  font-family: inherit;
  resize: none;
  background: #fff;
  transition: border 0.18s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border: 1.5px solid var(--accent);
  outline: none;
}
.contact-form button {
  align-self: center;
  min-width: 160px;
}

/* =========================
   Footer
   ========================= */
footer {
  background: var(--bg-dark);
  color: #cbd5e1;
  padding: 28px 0;
  text-align: center;
}
.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.footer-socials {
  display: flex;
  gap: 1.2rem;
}
.footer-socials a {
  color: #cbd5e1;
  font-size: 1.3rem;
  transition: color 0.18s;
}
.footer-socials a:hover {
  color: var(--accent);
}

/* =========================
   Skills (Yetenekler) Bölümü
   ========================= */
#skills {
  padding: 80px 0 40px 0;
  background: var(--bg-light);
}
.skills-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}
.skill-item {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 16px 0 rgba(31,41,55,0.07);
  padding: 1.5rem 1rem 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.18s, box-shadow 0.18s;
}
.skill-item:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 6px 32px 0 rgba(59,130,246,0.13);
}
.skill-icon {
  font-size: 2.2rem;
  margin-bottom: 0.7rem;
}
.skill-item span {
  font-weight: 600;
  margin-bottom: 0.7rem;
  color: var(--accent);
}
.skill-bar {
  width: 100%;
  height: 8px;
  background: #e5e7eb;
  border-radius: 8px;
  margin-top: 0.3rem;
  overflow: hidden;
}
.skill-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 60%, #60a5fa 100%);
  border-radius: 8px;
  transition: width 0.7s;
}

/* =========================
   Certificates (Sertifikalar) Bölümü
   ========================= */
#certificates {
  padding: 80px 0 40px 0;
  background: var(--bg-dark);
  color: var(--text-light);
}
.certificates-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}
.certificate-item {
  background: #232b39;
  border-radius: 16px;
  box-shadow: 0 2px 16px 0 rgba(31,41,55,0.09);
  padding: 1.2rem 1rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  min-height: 70px;
  text-align: left;
  transition: transform 0.18s, box-shadow 0.18s;
}
.certificate-item:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 6px 32px 0 rgba(59,130,246,0.13);
}
.certificate-logo {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: #fff;
  object-fit: contain;
  box-shadow: 0 1px 6px 0 rgba(31,41,55,0.07);
}
.certificate-item strong {
  color: var(--accent);
  font-size: 1.05rem;
}

/* =========================
   Responsive Tasarım
   ========================= */
@media (max-width: 900px) {
  .container {
    width: 96%;
  }
  .nav-links {
    gap: 1.2rem;
  }
}
@media (max-width: 600px) {
  .nav-container {
    flex-direction: column;
    height: auto;
    gap: 0.5rem;
    padding: 0.7rem 0;
  }
  .nav-links {
    flex-direction: column;
    gap: 0.7rem;
    align-items: center;
  }
  .hero-content h1 {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.3rem;
  }
  .projects-grid {
    gap: 1rem;
  }
  .project-card {
    padding: 1.2rem 0.7rem;
  }
  .about-content p {
    font-size: 1rem;
  }
  .contact-content {
    padding: 0 0.5rem;
  }
  .skills-grid, .certificates-grid {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }
  .skill-item, .certificate-item {
    padding: 1.1rem 0.7rem;
  }
  .project-slider {
    min-height: 110px;
  }
  .slider-img {
    height: 110px;
    max-width: 98vw;
  }
  .slider-btn {
    font-size: 1.2rem;
    width: 28px;
    height: 28px;
  }
}

/* =========================
   Scroll Reveal Animasyonları
   ========================= */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(.4,0,.2,1), transform 0.7s cubic-bezier(.4,0,.2,1);
}
.reveal.active {
  opacity: 1;
  transform: none;
}