:root {
  --primary-dark: #1b2a34; /* Koyu çelik mavisi */
  --primary-light: #4e4e4ea9; /* Orta koyu mavi-gri */
  --accent: #777777c4; /* Hafif vurgu rengi, mühendislik estetiğine uygun */
  
  --text-dark: #0f1d26; /* Çok koyu mavi-gri metin */
  --text-medium: #253744; /* Orta koyu gri-mavi */
  --text-light: #3d515d; /* Açık gri-mavi */
  --text-lighter: #586977; /* Daha açık gri-mavi */

  --white: #ffffff; /* Beyaz */
  --black: #000000; /* Siyah */

  --shadow-color: rgba(0, 0, 0, 0.2); /* Hafif gölge */
  --shadow-dark: rgba(0, 0, 0, 0.4); /* Daha koyu gölge */
  --shadow-light: rgba(0, 0, 0, 0.1); /* Hafif gölge */

  --transparent-black-20: rgba(0, 0, 0, 0.2); 
  --transparent-black-60: rgba(0, 0, 0, 0.6);
  --transparent-white-30: rgba(255, 255, 255, 0.3);
  --transparent-white-75: rgba(255, 255, 255, 0.75);

  --highlight-blue: #1e3a4b; /* Koyu vurgu mavisi */
  --background-dark: #121a21; /* Derin koyu gri-mavi arka plan */
  --background-light: #d3d7da; /* Açık mühendislik gri tonu */

  --link-color: #2a536a; /* Koyu çelik mavi bağlantı rengi */
  --error-color: #992b2b; /* Hafif koyu kırmızı (göz yormayan ama dikkat çeken) */
}


/* Mevcut stiller değişkenlerle güncelleniyor */
body,
html {
  font-family: "Open Sans", sans-serif;
  text-rendering: optimizeLegibility !important;
  -webkit-font-smoothing: antialiased !important;
  color: var(--text-light);
  font-weight: 400;
  width: 100% !important;
  height: 100% !important;
}

h2,
h3,
h4 {
  font-family: "Raleway", sans-serif;
}

h2 {
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 800;
  font-size: 36px;
  color: var(--text-dark);
}

h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-dark);
}

h4 {
  font-size: 18px;
  color: var(--text-dark);
  font-weight: 600;
}

h5 {
  text-transform: uppercase;
  font-weight: 700;
  line-height: 20px;
}

p {
  font-size: 15px;
}

p.intro {
  margin: 12px 0 0;
  line-height: 24px;
}

a {
  color: var(--link-color);
  font-weight: 400;
}

a:hover,
a:focus {
  text-decoration: none;
  color: var(--link-color);
}

ul,
ol {
  list-style: none;
}

hr {
  height: 2px;
  width: 70px;
  text-align: center;
  position: relative;
  background: var(--highlight-green);
  margin-bottom: 20px;
  border: 0;
}

/* Navigation */
#menu {
  padding: 15px;
  transition: all 0.8s;
}

#menu.navbar-default {
  background-color: var(--white);
  border-color: rgba(231, 231, 231, 0);
  box-shadow: 0 0 10px var(--shadow-color);
}

#menu a.navbar-brand {
  font-family: "Raleway", sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  text-transform: uppercase;
}

#menu.navbar-default .navbar-nav > li > a {
  font-family: "Lato", sans-serif;
  text-transform: uppercase;
  color: var(--text-medium);
  font-size: 15px;
  font-weight: 400;
  padding: 8px 2px;
  border-radius: 0;
  margin: 9px 20px 0;
}

#menu.navbar-default .navbar-nav > li > a:after {
  display: block;
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  content: "";
  transition: width 0.2s;
}

#menu.navbar-default .navbar-nav > li > a:hover:after {
  width: 100%;
}

.navbar-default .navbar-nav > .active > a,
.navbar-default .navbar-nav > .active > a:hover,
.navbar-default .navbar-nav > .active > a:focus {
  background-color: transparent;
}

.navbar-default .navbar-nav > .active > a:after,
.navbar-default .navbar-nav > .active > a:hover:after,
.navbar-default .navbar-nav > .active > a:focus:after {
  display: block !important;
  position: absolute !important;
  left: 0 !important;
  bottom: -1px !important;
  width: 100% !important;
  height: 2px !important;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%) !important;
  content: "" !important;
  transition: width 0.2s !important;
}

.navbar-toggle {
  border-radius: 0;
}

.navbar-default .navbar-toggle:hover,
.navbar-default .navbar-toggle:focus {
  background-color: var(--white);
  border-color: var(--link-color);
}

.navbar-default .navbar-toggle:hover > .icon-bar {
  background-color: var(--link-color);
}

.section-title {
  margin-bottom: 70px;
}

.section-title h2 {
  position: relative;
  margin-top: 10px;
  margin-bottom: 15px;
  padding-bottom: 15px;
}

.section-title h2::after {
  position: absolute;
  content: "";
  background: linear-gradient(to right, var(--primary-light) 0%, var(--primary-dark) 100%);
  height: 4px;
  width: 60px;
  bottom: 0;
  margin-left: -30px;
  left: 50%;
}

.section-title p {
  font-size: 18px;
}

.btn-custom {
  font-family: "Raleway", sans-serif;
  text-transform: uppercase;
  color: var(--white);
  background-color: var(--primary-light);
  background-image: linear-gradient(to right, var(--primary-light) 0%, var(--primary-dark) 100%);
  padding: 14px 34px;
  letter-spacing: 1px;
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  border-radius: 25px;
  transition: all 0.5s linear;
  border: 0;
}

.btn-custom:hover,
.btn-custom:focus,
.btn-custom.focus,
.btn-custom:active,
.btn-custom.active {
  color: var(--white);
  background-image: none;
  background-color: var(--primary-dark);
}

/* Header Section */
.intro {
  display: table;
  width: 100%;
  padding: 0;
  position: relative;
  /* overflow: hidden; */
}

.video-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

#video1 {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 1.2s linear;
}

.video1 {
  opacity: 1;
}

.intro .overlay {
  background: var(--transparent-black-20);
}

.intro h1 {
  font-family: "Raleway", sans-serif;
  color: var(--white);
  font-size: 82px;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 10px;
}

.intro h1 span {
  font-weight: 800;
  color: var(--primary-light);
}

.intro p {
  color: var(--white);
  font-size: 22px;
  font-weight: 300;
  line-height: 30px;
  margin: 0 auto;
  margin-bottom: 60px;
}

header .intro-text {
  padding-top: 350px;
  padding-bottom: 200px;
  text-align: center;
}

/* Features Section */
 
#features {
  background: var(--background-light);
}

#features i.fa {
  font-size: 1.2rem;
  margin-bottom: 20px;
  transition: all 0.5s;
  color: var(--white);
  width: 100px;
  height: 100px;
  padding: 30px 0;
  border-radius: 50%;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  box-shadow: 10px 10px 10px var(--shadow-light);
}

/* About Section */
#about {
  padding: 100px 0;
}

#about h3 {
  font-size: 22px;
  margin: 0 0 20px;
}

#about h2 {
  position: relative;
  margin-bottom: 15px;
  padding-bottom: 15px;
}

#about h2::after {
  position: absolute;
  content: "";
  background: linear-gradient(to right, var(--primary-light) 0%, var(--primary-dark) 100%);
  height: 4px;
  width: 60px;
  bottom: 0;
  left: 0;
}

#about .about-text li {
  margin-bottom: 6px;
  margin-left: 6px;
  list-style: none;
  padding: 0;
}

#about .about-text li:before {
  content: "\f00c";
  font-family: "FontAwesome";
  color: var(--primary-light);
  font-size: 11px;
  font-weight: 300;
  padding-right: 8px;
}
 
#about img {
  width: 520px;
  margin-top: 10px;
  background: var(--white);
  border-right: 0;
  box-shadow: 0 0 50px var(--shadow-light);
}

#about p {
  line-height: 24px;
  margin: 30px 0;
}

/* Services Section */
#projects {
  padding: 100px 0;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  color: var(--white);
}
#services {
  padding: 100px 0;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  color: var(--white);
}

#services .service-desc {
  margin: 10px 10px 20px;
}

#services h2 {
  color: var(--white);
}

#services .section-title h2::after {
  position: absolute;
  content: "";
  background: var(--transparent-white-30);
  height: 4px;
  width: 60px;
  bottom: 0;
  margin-left: -30px;
  left: 50%;
}

#services i.fa {
  font-size: 42px;
  width: 120px;
  height: 120px;
  padding: 40px 0;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  color: var(--white);
  box-shadow: 10px 10px 10px var(--shadow-light);
}

#services h3 {
  font-weight: 500;
  padding: 5px 0;
  color: var(--white);
}

#services p {
  color: var(--transparent-white-75);
}

#services .service-desc {
  margin-bottom: 40px;
}

.service-card{
  border: 1px solid var(--transparent-white);
}

/* Portfolio Section */
#portfolio {
  padding: 100px 0;
}

.portfolio-item {
  margin: 1px -15px 0 -14px;
  padding: 0;
}

.portfolio-item .hover-bg {
  /* overflow: hidden; */
  position: relative;
  margin: 0;
}

.hover-bg .hover-text {
  position: absolute;
  text-align: center;
  margin: 0 auto;
  color: var(--white);
  background: linear-gradient(
    to right,
    var(--primary-dark) 0%,
    var(--primary-light) 100%
  );
  padding: 30% 0 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: all 0.5s;
}

.hover-bg .hover-text > h4 {
  opacity: 0;
  color: var(--white);
  -webkit-transform: translateY(100%);
  transform: translateY(100%);
  transition: all 0.3s;
  font-size: 18px;
  letter-spacing: 1px;
  font-weight: 500;
  text-transform: uppercase;
}

.hover-bg:hover .hover-text > h4 {
  opacity: 1;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

.hover-bg:hover .hover-text {
  opacity: 1;
}

/* Testimonials Section */
#testimonials {
  padding: 100px 0;
  background: var(--background-light);
}

#testimonials i {
  color: #e6e6e6; /* Bu renk çok spesifik, değişken yapmadım */
  font-size: 32px;
  margin-bottom: 20px;
}

.testimonial {
  position: relative;
  padding: 20px;
}

.testimonial-image {
  float: left;
  margin-right: 15px;
}

.testimonial-image,
.testimonial-image img {
  display: block;
  width: 64px;
  height: 64px;
  border-radius: 50%;
}

.testimonial-content {
  position: relative;
  overflow: hidden;
}

.testimonial-content p {
  margin-bottom: 0;
  font-size: 14px;
  font-style: italic;
}

.testimonial-meta {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 600;
  color: #666; /* Bu da spesifik bir renk, değişken yapmadım */
}

/* Team Section */
#team {
  padding: 100px 0;
}

#team h4 {
  margin: 5px 0;
}

#team .team-img {
  width: 240px;
}

#team .thumbnail {
  background: transparent;
  border: 0;
}

#team .thumbnail .caption {
  padding: 10px 0 0;
  color: var(--text-lighter);
}

/* Contact Section */
#contact {
  padding: 100px 0 60px;
  background: linear-gradient(to right, var(--primary-dark) 0%, var(--primary-light) 100%);
  color: var(--transparent-white-75);
}

#contact .section-title {
  margin-bottom: 40px;
}

#contact .section-title p {
  font-size: 16px;
}

#contact h2 {
  color: var(--white);
  margin-top: 10px;
  margin-bottom: 15px;
  padding-bottom: 15px;
}

#contact .section-title h2::after {
  position: absolute;
  content: "";
  background: var(--transparent-white-30);
  height: 4px;
  width: 60px;
  bottom: 0;
  left: 30px;
}

#contact h3 {
  color: var(--white);
  margin-top: 80px;
  margin-bottom: 25px;
  padding-bottom: 20px;
  font-weight: 400;
}

#contact form {
  padding-top: 20px;
}

#contact .text-danger {
  color: var(--error-color);
  text-align: left;
}

#contact .btn-custom {
  margin: 30px 0;
  background: transparent;
  border: 2px solid var(--white);
}

#contact .btn-custom:hover {
  color: #1f386e; /* Bu renk spesifik, değişken yapmadım */
  background: var(--white);
}

label {
  font-size: 12px;
  font-weight: 400;
  font-family: "Open Sans", sans-serif;
  float: left;
}

#contact .form-control {
  display: block;
  width: 100%;
  padding: 6px 12px;
  font-size: 16px;
  line-height: 1.42857143;
  color: #444; /* Spesifik renk, değişken yapmadım */
  background-color: var(--white);
  background-image: none;
  border: 1px solid #ddd; /* Spesifik gri ton, değişken yapmadım */
  border-radius: 0;
  -webkit-box-shadow: none;
  box-shadow: none;
  -webkit-transition: none;
  -o-transition: none;
  transition: none;
}

#contact .form-control:focus {
  border-color: #999; /* Spesifik gri ton, değişken yapmadım */
  outline: 0;
  -webkit-box-shadow: transparent;
  box-shadow: transparent;
}

.form-control::-webkit-input-placeholder {
  color: var(--text-light);
}

.form-control:-moz-placeholder {
  color: var(--text-light);
}

.form-control::-moz-placeholder {
  color: var(--text-light);
}

.form-control:-ms-input-placeholder {
  color: var(--text-light);
}

#contact .contact-item {
  margin: 20px 0;
}

#contact .contact-item span {
  color: var(--white);
  margin-bottom: 10px;
  display: block;
}

#contact .contact-item i.fa {
  margin-right: 10px;
}

#contact .social {
  border-top: 1px solid rgba(255, 255, 255, 0.15); /* Çok spesifik opaklık, değişken yapmadım */
  padding-top: 50px;
  margin-top: 50px;
  text-align: center;
}

#contact .social ul li {
  display: inline-block;
  margin: 0 20px;
}

#contact .social i.fa {
  font-size: 22px;
  width: 48px;
  height: 48px;
  padding: 12px 0;
  border: 2px solid var(--white);
  color: var(--white);
  border-radius: 50%;
  transition: all 0.3s;
}

#contact .social i.fa:hover {
  color: var(--link-color);
  background: var(--white);
}

/* Footer Section */
#footer {
  background: var(--background-light);
  padding: 30px 0;
}

#footer p {
  color: var(--text-lighter);
  font-size: 14px;
}

#footer a {
  color: var(--link-color);
}

#footer a:hover {
  border-bottom: 2px solid var(--link-color);
}

@media (max-width: 768px) {
  #about img {
    margin: 50px 0;
  }

  html, body {
  scroll-snap-type: y mandatory;
  overflow-y: scroll;
}

section, header {
  scroll-snap-align: start;
  height: 100vh;
}
}
html, body {
  height: 100%;
  margin: 0;
  scroll-snap-type: y mandatory;
  overflow-y: scroll;
  scroll-behavior: smooth; /* geçişleri yumuşat */
}
section, div[id] {
  scroll-snap-align: start;
}