:root {
  --primary-color: #0b64d6;
  --hover-color: #094ea8;
  --accent-color: #ff6600;
  --text-color: #333;
  --light-gray: #ddd;
  --white: #FFFFFF;
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
  --spacing-unit: 20px;
  --spacing-small: 10px;
  --transition-default: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: auto;
  border-radius: 8px;
}

/* Header & Navigasyon */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--white);
  padding: 0.9rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-light);
}

header .logo img {
  height: 75px;
  margin-left: var(--spacing-unit);
}

nav#navbar {
  display: flex;
  gap: 25px;
  margin-right: 45px;
  transition: var(--transition-default);
}

nav#navbar a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: bold;
  font-family: 'Verdana', sans-serif;
  font-size: clamp(14px, 2.5vw, 21px);
  transition: var(--transition-default);
}

nav#navbar a:hover {
  color: var(--accent-color);
}

.menu-toggle {
  display: none;
  font-size: 2rem;
  color: var(--primary-color);
  cursor: pointer;
}

/* Mobil Menü */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    padding: 15px 25px;
  }

  .logo img {
    height: 55px;
  }

  .menu-toggle {
    display: block;
  }

  nav#navbar {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    right: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-medium);
    margin-right: 0;
  }

  nav#navbar.active {
    display: flex;
  }

  nav#navbar a {
    padding: 15px 0;
    text-align: center;
    border-bottom: 1px solid #eee;
  }
}

/* Slider */
.slider {
  position: relative;
  max-width: 100%;
  overflow: hidden;
}

.slides img {
  display: none;
  width: 100%;
  height: auto;
}

.slides img.active {
  display: block;
}

/* Genel Bölümler (intro, about, projects, contact, info) */
.intro,
.about,
.projects,
.contact,
.info {
  text-align: center;
  padding: 40px 20px;
  background: #f7f8fb;
  border-radius: 8px;
  max-width: 1200px;
  margin: 0 auto;
}

.intro h1,
.about h1,
.projects h1,
.contact h1,
.info h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.intro p,
.about p,
.projects p,
.contact p,
.info p {
  font-size: 1.2rem;
  color: #555;
  max-width: 800px;
  margin: 0 auto 20px;
}

.cta-button {
  display: inline-block;
  padding: 12px 24px;
  background: var(--primary-color);
  color: var(--white);
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  transition: var(--transition-default);
}

.cta-button:hover {
  background: var(--accent-color);
}

/* Hakkımızda */
.about-section,
main.about-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--spacing-unit);
  display: flex;
  flex-direction: row;
  gap: 40px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.about-content {
  flex: 2;
  text-align: justify;
  line-height: 1.4;
  font-size: clamp(15px, 2vw, 16px);
}

.about-content h1 {
  text-align: center;
  font-size: clamp(1.6em, 4vw, 1.9em);
  color: var(--primary-color);
  margin-bottom: 25px;
}

.about-content h2 {
  margin: 12px 0 6px;
  color: var(--primary-color);
  font-size: 1.25em;
}

.about-content p {
  margin: 4px 0;
}

.about-image {
  flex: 1;
  text-align: center;
}

.about-image img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: var(--shadow-medium);
}

.about-image p {
  margin: 5px 0;
  font-size: 14px;
}

@media (max-width: 900px) {
  .about-section,
  main.about-section {
    flex-direction: column;
    padding: 15px;
  }

  .about-content {
    font-size: 15px;
  }
}

/* Projeler */
.projects-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-unit);
  text-align: center;
}

.projects-section h1 {
  font-size: clamp(22px, 5vw, 28px);
  color: var(--primary-color);
  margin-bottom: var(--spacing-small);
}

.projects-section p {
  font-size: 16px;
  margin-bottom: 15px;
  color: var(--text-color);
}

.project-list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--spacing-unit);
}

.project-list li {
  display: inline-block;
  margin: 5px var(--spacing-small);
  font-weight: 600;
  color: #444;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 15px;
  justify-content: center;
}

.project-gallery img {
  width: 100%;
  height: auto;
  object-fit: cover;
  box-shadow: var(--shadow-light);
  transition: var(--transition-default);
}

.project-gallery img:hover {
  transform: scale(1.04);
  box-shadow: var(--shadow-medium);
}

@media (max-width: 480px) {
  .project-gallery {
    grid-template-columns: 1fr;
  }
}

/* İletişim Formu */
.contact-form {
  max-width: 600px;
  margin: 30px auto;
  background: #f9f9f9;
  padding: var(--spacing-unit);
  border-radius: 10px;
}

.contact-form label {
  display: block;
  margin-top: var(--spacing-small);
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: var(--spacing-small);
  margin-top: 4px;
  border: 1px solid var(--light-gray);
  border-radius: 6px;
}

.contact-form button {
  margin-top: 15px;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 12px var(--spacing-unit);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition-default);
}

.contact-form button:hover {
  background: var(--hover-color);
}

/* Footer & İletişim Bar */
footer {
  background: var(--white);
  color: var(--primary-color);
  text-align: center;
  padding: 0.9rem 2rem;
}

footer .social img {
  width: 24px;
  margin: 0 9px;
}

.contact-bar {
  position: fixed;
  bottom: var(--spacing-unit);
  right: var(--spacing-unit);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
}

.contact-btn,
.social-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  cursor: pointer;
  transition: transform 0.25s ease;
  box-shadow: var(--shadow-medium);
  opacity: 0.9;
}

.contact-btn:hover,
.social-btn:hover {
  transform: scale(1.1);
  opacity: 1;
}

.contact-btn svg,
.social-btn svg {
  width: 28px;
  height: 28px;
}

.contact-btn::after,
.social-btn::after {
  content: attr(data-label);
  position: absolute;
  background: rgba(0, 0, 0, 0.8);
  color: var(--white);
  font-size: 13px;
  padding: 6px var(--spacing-small);
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.contact-btn::after {
  right: 65px;
  top: 50%;
  transform: translateY(-50%);
}

.social-btn::after {
  bottom: 65px;
  left: 50%;
  transform: translateX(-50%);
}

.contact-btn:hover::after,
.social-btn:hover::after {
  opacity: 1;
}

/* Sosyal Medya Renkleri */
.whatsapp { background: #25D366; }
.phone { background: #0A66C2; }
.mail { background: #E34133; }
.map { background: #34A853; }
.instagram { background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); }
.facebook { background: #1877F2; }
.x { background: #000; }
.youtube { background: #FF0000; }
.linkedin { background: #0A66C2; }

@media (max-width: 768px) {
  .contact-bar {
    flex-direction: row;
    bottom: 15px;
    right: var(--spacing-small);
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .contact-btn,
  .social-btn {
    width: 46px;
    height: 46px;
  }

  .contact-btn svg,
  .social-btn svg {
    width: 22px;
    height: 22px;
  }

  .contact-btn::after,
  .social-btn::after {
    display: none;
  }
}

/* Keywords-list */
.keywords-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-unit);
  padding: var(--spacing-unit);
  max-width: 1200px;
  margin: 0 auto;
}

.keywords-list article {
  border: 1px solid var(--light-gray);
  padding: 15px;
  border-radius: 8px;
  transition: box-shadow 0.3s ease;
}

.keywords-list article:hover {
  box-shadow: var(--shadow-medium);
}

.keywords-list h3 {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-small);
  color: var(--primary-color);
}

.keywords-list p {
  font-size: 1rem;
  color: #555;
}

/* Hizmetler ve Hakkımızda için Akordiyon */
.accordion {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-unit);
}

.item {
  border-bottom: 1px solid var(--light-gray);
  margin-bottom: 10px;
}

.trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f7f8fb;
  border: none;
  padding: 15px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 600;
  transition: background 0.3s ease;
}

.trigger:hover {
  background: #eaf2ff;
}

.left {
  display: flex;
  align-items: center;
  gap: 15px;
}

.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-color);
  color: var(--white);
  font-size: 1rem;
}

.title {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.subtitle {
  display: block;
  font-size: 1rem;
  color: #555;
}

.chev {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.item[aria-expanded="true"] .chev {
  transform: rotate(180deg);
}

.panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.item[aria-expanded="true"] .panel {
  max-height: 1000px;/* Daha fazla içerik için */
}

.panel-inner {
  padding: 15px;
}

.panel-inner img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 10px 0;
}

.social-links a {
  margin-right: 10px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.social-links a:hover {
  color: var(--accent-color);
}

/* Görünmez SEO başlıklar */
.main-title, .sub-title, .detail-title {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

/* Hakkımızda Accordion için */
.about-accordion {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-unit);
}

.accordion-item {
  border-bottom: 1px solid var(--light-gray);
  margin-bottom: 10px;
}

.accordion-header {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f7f8fb;
  border: none;
  padding: 15px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 600;
  transition: background 0.3s ease;
}

.accordion-header:hover {
  background: #eaf2ff;
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 15px;
}

.accordion-item.active .accordion-body {
  max-height: 500px;
  padding: 15px;
}


/* Footer & İletişim Bar */
footer {
  background: var(--white);
  color: var(--primary-color);
  text-align: center;
  padding: 0.9rem 2rem;
}

footer .social img {
  width: 24px;
  margin: 0 9px;
}