:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --card: rgba(255, 255, 255, 0.86);

  --text: #111827;
  --text-soft: #667085;
  --text-faint: #94a3b8;

  --line: rgba(17, 24, 39, 0.08);
  --line-strong: rgba(17, 24, 39, 0.12);

  --accent: #2962ff;
  --accent-soft: rgba(255, 122, 0, 0.12);

  --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 18px 50px rgba(15, 23, 42, 0.08);

  --radius-md: 20px;
  --radius-lg: 28px;

  --container: 1240px;
  --header-height: 88px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: var(--header-height);
  font-family: Inter, Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(255, 122, 0, 0.08), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 48%, #ffffff 100%);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

.site-shell {
  position: relative;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

/* HEADER */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 9999;
  background: #ffffff;
  border-bottom: 1px solid rgba(17, 24, 39, 0.08);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-link {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  height: 46px;
  position: relative;
  z-index: 2;
  transition: transform 0.3s ease;
}

.brand-link:hover .brand-logo {
  transform: scale(1.04);
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 28px;
  margin-left: auto;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.top-nav a {
  font-size: 0.94rem;
  color: var(--text-soft);
  transition: color 0.25s ease;
}

.top-nav a:hover {
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  padding: 5px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.04);
  border: 1px solid rgba(17, 24, 39, 0.08);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-soft);
  min-width: 54px;
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.lang-btn.active {
  color: #ffffff;
  background: #111827;
}

/* HERO */
.hero-section {
  position: relative;
  padding: 56px 0 72px;
  min-height: calc(100vh - var(--header-height));
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 122, 0, 0.09), transparent 22%),
    radial-gradient(circle at 14% 30%, rgba(255, 122, 0, 0.05), transparent 18%),
    radial-gradient(circle at 86% 24%, rgba(255, 122, 0, 0.05), transparent 18%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  min-height: calc(100vh - var(--header-height) - 56px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-background-elements {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(32px);
}

.glow-1 {
  width: 420px;
  height: 420px;
  left: 10%;
  top: 10%;
  background: radial-gradient(circle, rgba(255, 122, 0, 0.10), transparent 68%);
}

.glow-2 {
  width: 520px;
  height: 520px;
  right: 8%;
  bottom: 4%;
  background: radial-gradient(circle, rgba(255, 122, 0, 0.12), transparent 70%);
}

.grid-lines {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(transparent 97%, rgba(17, 24, 39, 0.04) 100%),
    linear-gradient(90deg, transparent 97%, rgba(17, 24, 39, 0.04) 100%);
  background-size: 120px 120px;
  opacity: 0.55;
}

.hero-top-copy {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto 42px;
  text-align: center;
}

.hero-kicker,
.section-kicker,
.contact-card-label {
  display: inline-block;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
}

.hero-kicker {
  margin-bottom: 18px;
}

.hero-title {
  margin: 0;
  font-size: clamp(2.9rem, 7vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  font-weight: 700;
  color: var(--text);
}

.hero-title .accent {
  color: var(--accent);
}

.hero-text {
  max-width: 700px;
  margin: 24px auto 0;
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.85;
}

.hero-stage {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: clip;
}

/* AIRCRAFT */
.aircraft-zone {
  position: relative;
  width: min(520px, 70vw);
  aspect-ratio: 1 / 1.2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.aircraft-core {
  position: absolute;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.aircraft-mover {
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, -50%);
  animation: planeRise 4s linear infinite;
  z-index: 3;
}

.aircraft-fallback-icon {
  font-size: 5rem;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(255, 122, 0, 0.12);
  line-height: 1;
  transform: rotate(-90deg);
}

@keyframes planeRise {
  0% {
    transform: translate(-50%, 60px);
    opacity: 0;
  }
  10% {
    transform: translate(-50%, 30px);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -180px);
    opacity: 0;
  }
}

.aircraft-trail {
  position: absolute;
  width: 8px;
  height: 0;
  left: 50%;
  bottom: 24%;
  transform: translateX(-50%);
  border-radius: 999px;
  background: linear-gradient(
    to top,
    rgba(255, 122, 0, 0),
    rgba(255, 122, 0, 0.55),
    rgba(255, 122, 0, 0)
  );
  filter: blur(2px);
  opacity: 0;
  animation: trailMove 4s linear infinite;
}

.aircraft-trail.secondary {
  width: 18px;
  filter: blur(12px);
  opacity: 0.14;
}

@keyframes trailMove {
  0% {
    height: 0;
    opacity: 0;
  }
  10% {
    height: 30px;
    opacity: 0.35;
  }
  100% {
    height: 260px;
    opacity: 0;
  }
}

.aircraft-ring {
  position: absolute;
  border-radius: 999px;
  border: 1px solid rgba(255, 122, 0, 0.16);
  animation: pulseRing 4.4s ease-in-out infinite;
}

.ring-1 {
  width: 240px;
  height: 240px;
}

.ring-2 {
  width: 330px;
  height: 330px;
  animation-delay: 0.55s;
}

.ring-3 {
  width: 430px;
  height: 430px;
  animation-delay: 1.1s;
}

@keyframes pulseRing {
  0%, 100% {
    transform: scale(1);
    opacity: 0.45;
  }
  50% {
    transform: scale(1.03);
    opacity: 0.95;
  }
}

/* INFO NODES */
.info-node {
  position: absolute;
  border: 1px solid rgba(255, 122, 0, 0.35);
  background: rgba(255, 255, 255, 0.86);
  color: var(--text);
  border-radius: 22px;
  padding: 18px 24px;
  min-width: 220px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  z-index: 3;
}

.info-node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 122, 0, 0.65), transparent);
}

.info-node:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 0, 0.55);
  background: rgba(255, 255, 255, 0.96);
}

.info-node span {
  display: block;
}

.node-label-en {
  color: var(--accent);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 8px;
}

.node-label-tr {
  color: var(--accent);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.node-left {
  left: 6%;
  top: 18%;
}

.node-right {
  right: 6%;
  top: 22%;
}

.node-bottom {
  bottom: 4%;
  left: 50%;
  transform: translateX(-50%);
}

.node-bottom:hover {
  transform: translateX(-50%) translateY(-4px);
}

.node-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 122, 0, 0), rgba(255, 122, 0, 0.45), rgba(255, 122, 0, 0));
  filter: drop-shadow(0 0 8px rgba(255, 122, 0, 0.08));
  z-index: 1;
}

.line-about {
  width: 180px;
  left: calc(6% + 220px);
  top: 27%;
}

.line-location {
  width: 180px;
  right: calc(6% + 220px);
  top: 31%;
}

.line-project {
  width: 1px;
  height: 160px;
  left: 50%;
  bottom: calc(4% + 76px);
  background: linear-gradient(180deg, rgba(255, 122, 0, 0), rgba(255, 122, 0, 0.45), rgba(255, 122, 0, 0));
}

/* CONTACT */
.contact-section {
  padding: 88px 0;
}

.section-heading {
  margin-bottom: 30px;
}

.section-heading h2 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
  color: var(--text);
}

.section-heading p {
  color: var(--text-soft);
  line-height: 1.9;
  margin: 18px 0 0;
  font-size: 1rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.contact-form-wrap,
.contact-info-wrap {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.contact-form-wrap {
  padding: 28px;
}

.contact-info-wrap {
  padding: 24px;
  display: grid;
  gap: 16px;
}

.form-row {
  display: grid;
  gap: 16px;
  margin-bottom: 16px;
}

.form-row.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-group label,
.contact-grid label {
  color: var(--text);
  font-size: 11px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  border: 1px solid rgba(17, 24, 39, 0.08);
  background: #f7f9fc;
  color: var(--text);
  border-radius: 16px;
  padding: 15px 16px;
  font-size: 12px;
  outline: none;
  transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  font-size: 11px;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(255, 122, 0, 0.32);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(255, 122, 0, 0.07);
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-actions {
  margin-top: 10px;
}

.submit-btn {
  border: 0;
  color: #ffffff;
  cursor: pointer;
  padding: 15px 24px;
  border-radius: 999px;
  background: #111827;
  box-shadow: 0 12px 28px rgba(17, 24, 39, 0.1);
  transition: transform 0.25s ease, background 0.25s ease;
  font-size: 12px;
}

.submit-btn:hover {
  transform: translateY(-3px);
  background: var(--accent);
}

.contact-card {
  padding: 20px;
  border-radius: 20px;
  background: #f8fafc;
  border: 1px solid rgba(17, 24, 39, 0.08);
}

.contact-card-label {
  margin-bottom: 10px;
  font-size: 10px;
  letter-spacing: 1.5px;
}

.contact-card-value {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.7;
}

/* FOOTER */
.site-footer {
  padding: 0 0 34px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-top: 1px solid rgba(17, 24, 39, 0.08);
  padding-top: 24px;
}

.footer-inner p {
  margin: 4px 0;
  font-size: 0.88rem;
  color: var(--text-soft);
}

.powered-by {
  letter-spacing: 0.04em;
  opacity: 0.82;
}

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 10000;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 10001;
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  width: min(700px, 100%);
  max-height: 85vh;
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 24px;
  padding: 28px;
  position: relative;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.12);
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 42px;
  height: 42px;
  border: none;
  background: #f3f4f6;
  border-radius: 14px;
  cursor: pointer;
  font-size: 22px;
}

.hidden {
  display: none;
}

/* PROJECT GALLERY */
.project-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.project-item {
  position: relative;
  border-radius: 20px;
  height: 240px;
  overflow: hidden;
  border: 1px solid rgba(17, 24, 39, 0.08);
  background: #ffffff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.project-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-item:hover img {
  transform: scale(1.04);
}

/* RESPONSIVE */
@media (max-width: 1180px) {
  .hero-stage {
    min-height: 760px;
  }

  .node-left {
    left: 2%;
  }

  .node-right {
    right: 2%;
  }

  .line-about,
  .line-location {
    display: none;
  }
}

@media (max-width: 1100px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .project-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 84px;
  }

  body {
    padding-top: var(--header-height);
  }

  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .site-header {
    height: var(--header-height);
  }

  .header-inner {
    height: var(--header-height);
    gap: 12px;
  }

  .brand-logo {
    height: 38px;
  }

  .header-right {
    gap: 12px;
  }

  .top-nav {
    gap: 12px;
  }

  .top-nav a {
    font-size: 0.82rem;
  }

  .lang-btn {
    min-width: 42px;
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  .hero-top-copy {
    margin-bottom: 30px;
  }

  .hero-title {
    font-size: clamp(2.4rem, 12vw, 4rem);
  }

  .hero-stage {
    min-height: 820px;
    display: grid;
    gap: 16px;
    justify-items: center;
  }

  .aircraft-zone {
    width: min(420px, 88vw);
    order: 1;
  }

  .info-node {
    position: relative;
    min-width: unset;
    width: 100%;
  }

  .node-left,
  .node-right,
  .node-bottom {
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    transform: none;
  }

  .node-bottom:hover {
    transform: translateY(-4px);
  }

  .node-about {
    order: 2;
  }

  .node-location {
    order: 3;
  }

  .node-project {
    order: 4;
  }

  .node-line {
    display: none;
  }

  .form-row.two-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .project-gallery {
    grid-template-columns: 1fr;
  }

  .project-item {
    height: 260px;
  }
}

@media (max-width: 560px) {
  .header-inner {
    justify-content: space-between;
  }

  .top-nav {
    display: none;
  }

  .contact-form-wrap,
  .contact-info-wrap {
    padding: 20px;
  }
}
.info-node:hover {
  border-color: rgba(255,122,0,0.7);
  box-shadow: 0 0 24px rgba(255,122,0,0.12);
}
.node-label-en,
.node-label-tr {
  color: #ff7a00;
}