/* ==========================================================================
   IC Nükleer Teknoloji — Yerleşim katmanı
   Site kabuğu, üst menü ve tam ekran menü paneli
   ========================================================================== */

.site-shell {
  background: #eaf2ee;
  min-height: 100svh;
}

/* --------------------------------------------------------------------------
   Üst menü
   -------------------------------------------------------------------------- */
.topbar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 104px;
  padding: 0 clamp(24px, 5vw, 84px);
  background: linear-gradient(#f8fbf96b, #f8fbf90f);
  border-bottom: 1px solid #083d2e24;
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity 0.8s 0.15s, transform 0.8s 0.15s;
}

.is-loaded .topbar {
  opacity: 1;
  transform: translateY(0);
}

/* Logo — menü açıkken negatif sürüme geçer */
.brand {
  position: relative;
  display: flex;
  align-items: center;
  width: 245px;
  height: 64px;
  padding: 0;
  background: none;
}

.brand img {
  position: absolute;
  top: 50%;
  left: 0;
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 5px 14px #052d211a);
  transform: translateY(-50%);
  transition: opacity 0.28s;
}

.brand-logo-default {
  opacity: 1;
}

.brand-logo-negative,
.topbar.menu-active .brand-logo-default {
  opacity: 0;
}

.topbar.menu-active .brand-logo-negative {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Sağ aksiyonlar
   -------------------------------------------------------------------------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Sosyal bağlantılar */
.social-links {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 46px;
  padding: 0 12px;
  border: 1px solid #084a3621;
  border-radius: 999px;
  background: #ffffff9e;
  -webkit-backdrop-filter: blur(15px);
  backdrop-filter: blur(15px);
  color: #4e4b58;
  box-shadow: 0 12px 32px #1c2f2817, inset 0 1px #ffffffb8;
}

.social-links a {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
  transition: color 0.3s, background 0.3s, transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.social-links a:hover {
  background: #0b765717;
  color: #0b7657;
  transform: translateY(-2px) scale(1.08);
}

.social-links svg {
  width: 17px;
  height: 17px;
}

.fill-icon {
  fill: currentColor;
  stroke: none;
}

.stroke-icon {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8px;
}

.icon-dot {
  fill: currentColor;
  stroke: none;
}

/* Dil seçici */
.language-wrap {
  position: relative;
  z-index: 34;
}

.language {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 10px 0 11px;
  border: 1px solid #084a3629;
  border-radius: 999px;
  background: #fff3;
  color: #0a503d;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.3s, background 0.3s, border-color 0.3s;
}

.language svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5px;
}

.language:hover {
  background: #0d7959;
  border-color: #0d7959;
  color: #fff;
}

.language i {
  width: 6px;
  height: 6px;
  margin-left: 1px;
  border-right: 1px solid;
  border-bottom: 1px solid;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.35s;
}

.language-wrap.open .language i {
  transform: translateY(2px) rotate(225deg);
}

.language-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  display: grid;
  gap: 3px;
  width: 150px;
  padding: 7px;
  border: 1px solid #084a3621;
  border-radius: 18px;
  background: #fafdfbf0;
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 50px #0831252b;
  opacity: 0;
  visibility: hidden;
  transform-origin: 100% 0;
  transform: translateY(-8px) scale(0.96);
  transition: opacity 0.3s, visibility 0.3s, transform 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.language-wrap.open .language-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.language-menu a {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: center;
  height: 44px;
  padding: 0 11px;
  border-radius: 12px;
  color: #07392a9e;
  text-align: left;
  transition: color 0.25s, background 0.25s;
}

.language-menu a:hover,
.language-menu a.selected {
  background: #0c765717;
  color: #07513c;
}

.language-menu strong {
  font-size: 11px;
  letter-spacing: 0.08em;
}

.language-menu span {
  font-size: 11px;
}

/* --------------------------------------------------------------------------
   Menü düğmesi
   -------------------------------------------------------------------------- */
.menu-toggle {
  position: relative;
  z-index: 32;
  flex: none;
  width: 64px;
  height: 64px;
  padding: 0;
  border: 1px solid #ffffff6b;
  border-radius: 50%;
  background: linear-gradient(145deg, #0a6a4d 0%, #15a879 100%);
  box-shadow: 0 13px 32px #05483433, inset 0 1px #ffffff4d;
  cursor: pointer;
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s,
    transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.menu-toggle::before {
  content: '';
  position: absolute;
  inset: 5px;
  border: 1px solid #ffffff24;
  border-radius: inherit;
  transition: inset 0.4s, border-color 0.4s;
}

.menu-toggle:hover {
  transform: scale(1.035);
  box-shadow: 0 17px 38px #05483442, inset 0 1px #ffffff52;
}

.menu-toggle:hover::before {
  inset: 3px;
  border-color: #ffffff3d;
}

.menu-toggle span {
  position: absolute;
  left: 20px;
  width: 24px;
  height: 1.5px;
  border-radius: 2px;
  background: #fff;
  transform-origin: 50%;
  transition: width 0.35s, left 0.35s, transform 0.42s cubic-bezier(0.2, 0.8, 0.2, 1),
    top 0.42s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.24s;
}

.menu-toggle span:first-child {
  top: 24px;
}

.menu-toggle span:nth-child(2) {
  top: 31px;
  left: 24px;
  width: 16px;
}

.menu-toggle span:nth-child(3) {
  top: 38px;
}

.menu-toggle:hover span:first-child,
.menu-toggle:hover span:nth-child(3) {
  left: 22px;
  width: 20px;
}

.menu-toggle:hover span:nth-child(2) {
  left: 20px;
  width: 24px;
}

.menu-toggle.active span:first-child {
  top: 31px;
  left: 20px;
  width: 24px;
  transform: rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.25);
}

.menu-toggle.active span:nth-child(3) {
  top: 31px;
  left: 20px;
  width: 24px;
  transform: rotate(-45deg);
}

/* Menü açıkken üst menü şeffaflaşır */
.topbar.menu-active {
  background: none;
  border-bottom-color: transparent;
}

.topbar.menu-active .menu-toggle {
  background: #ffffff1c;
  border-color: #ffffff73;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: none;
}

.topbar.menu-active .social-links,
.topbar.menu-active .language {
  background: #ffffff0f;
  border-color: #fff3;
  color: #ffffffd9;
  box-shadow: none;
}

.topbar.menu-active .social-links a:hover,
.topbar.menu-active .language:hover {
  background: #d8f2e5;
  border-color: #d8f2e5;
  color: #074b38;
}

/* --------------------------------------------------------------------------
   Tam ekran menü
   -------------------------------------------------------------------------- */
.mobile-panel {
  --menu-origin-x: calc(100% - clamp(60px, 6.8vw, 118px));
  --menu-origin-y: 52px;

  position: fixed;
  inset: 0;
  z-index: 18;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 clamp(28px, 8vw, 90px);
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 22%, #ffffff0e, #0000 22%),
    linear-gradient(135deg, #087556 0%, #075840 50%, #053d31 100%);
  text-align: center;
  visibility: hidden;
  clip-path: circle(0 at var(--menu-origin-x) var(--menu-origin-y));
  transition: clip-path 0.9s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s 0.9s;
}

.mobile-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.055;
  background-image:
    linear-gradient(#d2f6e459 1px, #0000 1px),
    linear-gradient(90deg, #d2f6e459 1px, #0000 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(circle at 80% 20%, #000, #0000 55%);
  mask-image: radial-gradient(circle at 80% 20%, #000, #0000 55%);
  pointer-events: none;
}

.mobile-panel.open {
  visibility: visible;
  clip-path: circle(150vmax at var(--menu-origin-x) var(--menu-origin-y));
  transition: clip-path 0.9s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s;
}

/* Arka plandaki atom */
.menu-atom-stage {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

/* Menü atomları — hareket loader.css'teki ortak kurallardan gelir,
   burada yalnızca konum, ölçek ve koyu zemine uygun renkler tanımlanır. */
.menu-atom {
  position: absolute;
  height: auto;
  overflow: visible;
}

.menu-atom .atom-orbit {
  stroke: #d6f5e5;
  stroke-width: 2.2px;
}

.menu-atom .atom-electron {
  fill: #c9f5df;
  filter: drop-shadow(0 0 8px #ceffe6d9);
}

.menu-atom .atom-nucleus {
  fill: #d6f5e5;
}

/* Sol alt: büyük ve soluk */
.menu-atom-back {
  bottom: -14vw;
  left: -7vw;
  width: min(43vw, 720px);
  opacity: 0.15;
  filter: drop-shadow(0 0 30px #b2eed11f);
  animation: atom-float 18s ease-in-out infinite;
}

/* Sağ üst köşe: menü metnine baskı yapmayacak kadar geri planda */
.menu-atom-front {
  top: clamp(16px, 2.4vh, 52px);
  right: clamp(4px, 1.2vw, 32px);
  width: min(22vw, 370px);
  opacity: 0.3;
}

.menu-atom-front .atom-orbit {
  stroke-width: 1.4px;
  opacity: 0.28;
}

.menu-atom-front .atom-electron {
  filter: drop-shadow(0 0 5px #ceffe680);
}

.menu-atom-front .atom-nucleus {
  fill: #eafff5;
}

/* Menü bağlantıları */
.mobile-panel nav {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  gap: clamp(2px, 0.55vh, 8px);
}

.mobile-panel .menu-link,
.projects-entry {
  position: relative;
  width: min(660px, 72vw);
  min-height: clamp(70px, 9vh, 94px);
}

.mobile-panel .menu-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  padding: 0 clamp(18px, 2.3vw, 34px);
  border: 0;
  background: none;
  color: #f5fbf8;
  font-size: clamp(40px, 4.8vw, 76px);
  font-weight: 300;
  letter-spacing: -0.045em;
  line-height: 1.02;
  cursor: pointer;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s, transform 0.72s cubic-bezier(0.2, 0.8, 0.2, 1), color 0.35s;
}

.mobile-panel .menu-link::before {
  content: '';
  position: absolute;
  bottom: 7px;
  left: 50%;
  z-index: 1;
  width: clamp(110px, 12vw, 180px);
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, #0000, #d2f7e4d1, #0000);
  opacity: 0;
  transform: translateX(-50%) scaleX(0);
  transition: opacity 0.4s, transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-entry {
  display: grid;
  grid-template-rows: clamp(70px, 9vh, 94px) 0fr;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s, transform 0.72s cubic-bezier(0.2, 0.8, 0.2, 1),
    grid-template-rows 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-entry.submenu-open {
  grid-template-rows: clamp(70px, 9vh, 94px) 54px;
}

.projects-entry .menu-link {
  width: 100%;
  opacity: 1;
  transform: none;
}

.mobile-panel.open nav > .menu-link,
.mobile-panel.open .projects-entry {
  opacity: 1;
  transform: translateY(0);
}

.mobile-panel.open nav > :first-child {
  transition-delay: 0.32s;
}

.mobile-panel.open nav > :nth-child(2) {
  transition-delay: 0.4s;
}

.mobile-panel.open nav > :nth-child(3) {
  transition-delay: 0.48s;
}

.mobile-panel.open nav > :nth-child(4) {
  transition-delay: 0.56s;
}

.mobile-panel.open nav > :nth-child(5) {
  transition-delay: 0.64s;
}

.mobile-panel.open nav > :nth-child(6) {
  transition-delay: 0.72s;
}

/* Üzerine gelinmeyen bağlantılar soluklaşır */
.mobile-panel nav:has(.menu-link:hover) > :not(:hover) {
  opacity: 0.46;
}

.mobile-panel .menu-link:hover,
.projects-entry.submenu-open .menu-link {
  color: #e9fff4;
  text-shadow: 0 0 30px #b9f0d538;
}

.mobile-panel .menu-link:hover::before,
.projects-entry.submenu-open .menu-link::before {
  opacity: 1;
  transform: translateX(-50%) scaleX(1);
}

.menu-arrow {
  position: absolute;
  top: 50%;
  right: clamp(18px, 2.3vw, 34px);
  color: #d1f6e4b3;
  font-size: 22px;
  font-weight: 300;
  opacity: 0;
  transform: translate(-12px, calc(8px - 50%));
  transition: opacity 0.16s, transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.menu-label {
  justify-self: center;
  transition: letter-spacing 0.45s, transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mobile-panel .menu-link:hover .menu-arrow,
.projects-entry.submenu-open .menu-arrow {
  opacity: 1;
  transform: translateY(-50%);
}

.mobile-panel .menu-link:hover .menu-label {
  letter-spacing: -0.02em;
  transform: translateY(-3px) scale(1.018);
}

/* Projeler alt menüsü */
.project-chevron {
  font-size: 25px;
  line-height: 1;
}

.projects-entry .project-chevron {
  opacity: 0.55;
  transform: translateY(-50%);
}

.projects-entry.submenu-open .project-chevron {
  opacity: 1;
  transform: translateY(-50%) rotate(180deg);
}

.projects-entry.submenu-open .menu-label {
  letter-spacing: -0.025em;
  transform: scale(1.018);
}

.project-submenu {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 13px;
  min-height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.35s, transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-entry.submenu-open .project-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(-4px);
}

.project-submenu a {
  padding: 9px 16px;
  border-radius: 999px;
  color: #e6fdf2d1;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: color 0.25s, background 0.25s, transform 0.25s;
}

.project-submenu a:hover {
  background: #d8f7e71a;
  color: #fff;
  transform: translateY(-2px);
}

.project-submenu i {
  width: 28px;
  height: 1px;
  background: #dcf9eb52;
}

.mobile-panel > span {
  position: absolute;
  bottom: 34px;
  left: 50%;
  z-index: 2;
  color: #ffffff6b;
  font-size: 10px;
  letter-spacing: 0.26em;
  white-space: nowrap;
  transform: translateX(-50%);
}

/* --------------------------------------------------------------------------
   Menü animasyonları
   -------------------------------------------------------------------------- */
@keyframes atom-float {
  0%,
  100% {
    transform: rotate(-8deg) translate(0);
  }
  50% {
    transform: rotate(6deg) translate(-12px, -8px);
  }
}


/* --------------------------------------------------------------------------
   Duyarlı davranış
   -------------------------------------------------------------------------- */
@media (max-width: 700px) {
  .topbar {
    height: 74px;
    padding: 0 10px;
  }

  .brand {
    width: 145px;
    height: 48px;
    padding: 0;
  }

  .header-actions {
    gap: 5px;
  }

  .social-links {
    gap: 0;
    height: 32px;
    padding: 0 4px;
  }

  .social-links a {
    width: 21px;
    height: 21px;
  }

  .social-links svg {
    width: 12px;
    height: 12px;
  }

  .language {
    height: 29px;
    padding: 0 7px;
    font-size: 8px;
  }

  .language svg {
    display: none;
  }

  .language-menu {
    width: 132px;
  }

  .menu-toggle {
    width: 50px;
    height: 50px;
  }

  .menu-toggle span {
    left: 15px;
    width: 20px;
  }

  .menu-toggle span:first-child {
    top: 18px;
  }

  .menu-toggle span:nth-child(2) {
    top: 24px;
    left: 19px;
    width: 12px;
  }

  .menu-toggle span:nth-child(3) {
    top: 30px;
  }

  .menu-toggle.active span:first-child,
  .menu-toggle.active span:nth-child(3) {
    top: 24px;
    left: 15px;
    width: 20px;
  }

  /* Dokunmatikte hover durumları devreye girmesin */
  .menu-toggle:hover {
    transform: none;
  }

  .menu-toggle:hover::before {
    inset: 5px;
    border-color: #ffffff24;
  }

  .menu-toggle:hover span:first-child,
  .menu-toggle:hover span:nth-child(3) {
    left: 15px;
    width: 20px;
  }

  .menu-toggle:hover span:nth-child(2) {
    left: 19px;
    width: 12px;
  }

  .menu-toggle.active:hover span:first-child,
  .menu-toggle.active:hover span:nth-child(3) {
    left: 15px;
    width: 20px;
  }

  .mobile-panel {
    --menu-origin-x: calc(100% - 35px);
    --menu-origin-y: 37px;

    padding: 0 24px;
  }

  .mobile-panel nav {
    gap: 4px;
  }

  .menu-atom-back {
    bottom: -8vw;
    left: -24vw;
    width: 78vw;
  }

  .menu-atom-front {
    top: 5vh;
    right: -16vw;
    width: 54vw;
    opacity: 0.26;
  }

  .mobile-panel .menu-link,
  .projects-entry {
    width: min(92vw, 520px);
    min-height: 68px;
  }

  .mobile-panel .menu-link {
    padding: 0 16px;
    font-size: clamp(35px, 11vw, 50px);
  }

  .menu-arrow {
    font-size: 18px;
  }

  .projects-entry {
    grid-template-rows: 68px 0fr;
  }

  .projects-entry.submenu-open {
    grid-template-rows: 68px 48px;
  }

  .projects-entry.submenu-open .menu-label {
    transform: scale(1.012);
  }

  .project-submenu a {
    padding: 8px 11px;
    font-size: 13px;
  }

  .mobile-panel > span {
    bottom: 25px;
    font-size: 8px;
  }
}

@media (max-height: 760px) and (min-width: 701px) {
  .topbar {
    height: 84px;
  }
}