/* LTLearner · tanıtım sayfası — biyolüminesans gece denizi.
   Derin lacivert zemin, mat yüzeyler, ışık yalnız izlerde ve düğümlerde. Hairline ızgara, kesin tipografi. */
:root {
  --zemin: #050B16;
  --zemin-2: #081221;
  --yuzey: #0B1627;
  --yuzey-2: #10203A;
  --kenar: rgba(255, 255, 255, 0.08);
  --kenar-2: rgba(255, 255, 255, 0.14);
  --metin: #E6EEF7;
  --soluk: #8FA2BD;
  --isik: #5BF2E6;
  --isik-koyu: #22C8B3;
  --menekse: #8A7CFF;
  --kum: #F4D9A6;
  --kum-koyu: #E9C27C;
  --radius: 18px;
  --olcu: 62ch;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --sans: "Geist", "Segoe UI", system-ui, sans-serif;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--zemin); color: var(--metin);
  font: 400 17px/1.6 var(--sans); font-feature-settings: "tnum" 1, "ss01" 1;
  -webkit-font-smoothing: antialiased; overflow-x: clip;
}
::selection { background: var(--isik); color: #041018; }
:focus-visible { outline: 2px solid var(--kum); outline-offset: 4px; border-radius: 8px; }
html { scrollbar-color: #2A3B57 var(--zemin); }
::-webkit-scrollbar { width: 11px; } ::-webkit-scrollbar-track { background: var(--zemin); } ::-webkit-scrollbar-thumb { background: #2A3B57; border-radius: 6px; border: 3px solid var(--zemin); }
a { color: var(--isik); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
svg, canvas { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -0.03em; line-height: 1; margin: 0; text-wrap: balance; font-variation-settings: "opsz" 96; }
h1 { font-size: clamp(2.9rem, 7vw, 5.4rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4.2vw, 3.3rem); }
h3 { font-size: 1.35rem; letter-spacing: -0.02em; line-height: 1.15; font-variation-settings: "opsz" 24; }
p { margin: 0; max-width: var(--olcu); text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.not { display: block; font-size: 0.86rem; color: var(--soluk); }
.atla { position: absolute; left: -999px; top: 8px; background: var(--kum); color: #041018; padding: 8px 12px; border-radius: 8px; z-index: 100; }
.atla:focus { left: 12px; }

/* ---- Üst çubuk ---- */
.ust {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 24px;
  padding: 12px clamp(16px, 4vw, 56px); background: rgba(5, 11, 22, 0.97); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); border-bottom: 1px solid var(--kenar);
}
.marka { display: inline-flex; align-items: center; gap: 10px; color: var(--metin); text-decoration: none; font: 700 1.15rem/1 var(--display); letter-spacing: -0.02em; }
.menu { display: flex; gap: 2px; margin-left: auto; }
.menu a { color: var(--soluk); text-decoration: none; font-weight: 500; font-size: 0.93rem; padding: 8px 12px; border-radius: 999px; transition: color 160ms var(--ease), background 160ms var(--ease); }
.menu a:hover { color: var(--metin); background: var(--yuzey-2); }
@media (max-width: 760px) { .menu { display: none; } }

/* ---- Düğmeler ---- */
.dugme {
  display: inline-flex; align-items: center; gap: 10px; background: var(--kum); color: #041018; text-decoration: none;
  font: 600 1rem/1 var(--sans); padding: 15px 22px; border-radius: 999px;
  box-shadow: 0 10px 30px -12px rgba(244, 217, 166, 0.55);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease), background 200ms var(--ease);
}
.dugme::after { content: "→"; font-weight: 500; opacity: 0.7; }
.dugme:hover { transform: translateY(-1px); background: var(--kum-koyu); box-shadow: 0 14px 34px -12px rgba(244, 217, 166, 0.7); }
.dugme:active { transform: translateY(0); }
.dugme-kucuk { padding: 10px 16px; font-size: 0.9rem; box-shadow: none; }
.baglanti { color: var(--metin); font-weight: 500; text-decoration: none; border-bottom: 1px solid var(--kenar-2); padding-bottom: 3px; transition: border-color 160ms var(--ease), color 160ms var(--ease); }
.baglanti::after { content: " ↓"; color: var(--soluk); }
.baglanti:hover { color: var(--isik); border-color: var(--isik); }
.eylemler { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 28px; margin-top: 34px; }

/* ---- Kapak ---- */
.kapak { position: relative; overflow: hidden; border-bottom: 1px solid var(--kenar);
  background: radial-gradient(900px 600px at 72% 42%, rgba(91, 242, 230, 0.07), transparent 65%), radial-gradient(700px 500px at 20% 90%, rgba(244, 217, 166, 0.05), transparent 70%), var(--zemin); }
.kapak-ic {
  position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px);
  align-items: center; max-width: 1360px; margin: 0 auto; padding: clamp(56px, 9vw, 128px) clamp(16px, 4vw, 56px) clamp(40px, 6vw, 72px);
}
.kapak-metin { max-width: 620px; }
.giris { font-size: clamp(1.08rem, 1.5vw, 1.22rem); margin-top: 28px; line-height: 1.6; color: #C9D5E6; }
.isiklar-alani { margin: 0; position: relative; }
.sahne { position: relative; aspect-ratio: 1 / 1.02; width: min(100%, 600px); margin: 0 auto; }
.uc { position: absolute; inset: 0; width: 100% !important; height: 100% !important; touch-action: pan-y; }
.sahne::after { content: ""; position: absolute; left: 10%; right: 10%; bottom: 6%; height: 18%; border-radius: 50%; background: radial-gradient(closest-side, rgba(91, 242, 230, 0.16), transparent); filter: blur(10px); pointer-events: none; z-index: 0; }
.uc { z-index: 1; }
.etiketler { position: absolute; inset: 0; pointer-events: none; z-index: 2; }
.etiketler .etiket { position: absolute; transform: translate(10px, -50%); white-space: nowrap; font: 500 0.78rem/1 var(--sans); color: var(--metin); background: rgba(5, 11, 22, 0.72); border: 1px solid var(--kenar-2); border-radius: 999px; padding: 6px 10px; display: inline-flex; gap: 7px; align-items: center; opacity: 0; transition: opacity 500ms var(--ease); }
.etiketler .etiket.goster { opacity: 1; }
.etiketler .etiket b { font-weight: 600; color: var(--isik); }
.etiketler .etiket.sira { color: var(--kum); border-color: rgba(244, 217, 166, 0.5); }
.etiketler .etiket.sira b { color: var(--kum); }
.etiketler .etiket::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.yedek { position: absolute; inset: 0; z-index: 1; }
.yedek svg { width: 100%; height: 100%; overflow: visible; }
.isik-secim { margin-top: 10px; display: grid; gap: 10px; justify-items: center; }
.secenekler { display: inline-flex; gap: 4px; padding: 4px; border: 1px solid var(--kenar-2); border-radius: 999px; background: rgba(8, 18, 33, 0.7); }
.secenek { font: 500 0.9rem/1 var(--sans); color: var(--soluk); background: transparent; border: 0; border-radius: 999px; padding: 9px 14px; cursor: pointer; display: inline-flex; gap: 6px; align-items: baseline; transition: color 160ms var(--ease), background 160ms var(--ease); }
.secenek span { font-size: 0.78rem; opacity: 0.8; }
.secenek:hover { color: var(--metin); }
.secenek.aktif { background: var(--yuzey-2); color: var(--metin); box-shadow: inset 0 0 0 1px var(--kenar-2); }
.gercekler {
  position: relative; display: grid; grid-template-columns: repeat(6, 1fr); max-width: 1360px; margin: 0 auto;
  border-top: 1px solid var(--kenar);
}
.gercekler li { display: grid; gap: 4px; padding: 20px clamp(16px, 4vw, 56px) 22px 20px; border-right: 1px solid var(--kenar); }
.gercekler li:first-child { padding-left: clamp(16px, 4vw, 56px); }
.gercekler li:last-child { border-right: 0; }
.gercekler .sayi { font: 600 1.9rem/1 var(--display); letter-spacing: -0.03em; font-variation-settings: "opsz" 48; }
.gercekler .gercek-ad { font-size: 0.86rem; color: var(--soluk); }
@media (max-width: 1000px) { .gercekler { grid-template-columns: repeat(3, 1fr); } .gercekler li:nth-child(3) { border-right: 0; } .gercekler li:nth-child(-n+3) { border-bottom: 1px solid var(--kenar); } }
@media (max-width: 760px) {
  .kapak-ic { grid-template-columns: 1fr; padding-top: 48px; }
  .gercekler { grid-template-columns: repeat(2, 1fr); }
  .gercekler li { padding-left: 16px; padding-right: 12px; }
  .gercekler li:nth-child(3) { border-right: 1px solid var(--kenar); } .gercekler li:nth-child(even) { border-right: 0; }
  .gercekler li:nth-child(-n+4) { border-bottom: 1px solid var(--kenar); }
}

/* ---- Bölümler ---- */
.bolum { max-width: 1360px; margin: 0 auto; padding: clamp(64px, 9vw, 128px) clamp(16px, 4vw, 56px) 0; }
.bolum-bas { max-width: 720px; margin-bottom: clamp(32px, 4vw, 52px); }
.bolum-bas p { margin-top: 16px; font-size: 1.1rem; color: var(--soluk); }
.veri { display: flex; flex-wrap: wrap; gap: 10px 26px; margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--kenar); }
.veri div { display: grid; gap: 2px; }
.veri dt { font-size: 0.76rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--soluk); }
.veri dd { margin: 0; font-weight: 600; font-size: 0.98rem; }
.formul { font-family: var(--display); font-weight: 600; color: var(--isik); white-space: nowrap; }

/* ---- Adımlar ---- */
.adimlar { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--kenar); border-radius: var(--radius); overflow: hidden; background: var(--zemin-2); }
.adim { padding: clamp(20px, 2.4vw, 30px); border-right: 1px solid var(--kenar); display: grid; align-content: start; gap: 14px; }
.adim:last-child { border-right: 0; }
.adim-glif { width: 100%; max-width: 200px; aspect-ratio: 1 / 1; height: auto; margin: -6px 0 -10px -6px; }
.adim-glif img { width: 100%; height: 100%; object-fit: contain; }
.adim p { font-size: 0.98rem; color: #C9D5E6; }
@media (max-width: 1000px) { .adimlar { grid-template-columns: repeat(2, 1fr); } .adim:nth-child(2) { border-right: 0; } .adim:nth-child(-n+2) { border-bottom: 1px solid var(--kenar); } }
@media (max-width: 560px) { .adimlar { grid-template-columns: 1fr; } .adim { border-right: 0; border-bottom: 1px solid var(--kenar); } .adim:last-child { border-bottom: 0; } }

/* ---- Tuğlalar ---- */
.tuglalar { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--kenar); border-radius: var(--radius); overflow: hidden; background: var(--zemin-2); }
.tugla-kart { padding: 18px 16px 20px; display: grid; gap: 6px; align-content: start; border-right: 1px solid var(--kenar); border-bottom: 1px solid var(--kenar); transition: background 200ms var(--ease); }
.tugla-kart:nth-child(5n) { border-right: 0; } .tugla-kart:nth-last-child(-n+5) { border-bottom: 0; }
.tugla-kart:hover { background: var(--yuzey); }
.tugla-kart img { width: 100%; aspect-ratio: 1 / 1; height: auto; object-fit: contain; margin-bottom: 4px; }
.tugla-ad { font: 600 1.05rem/1.1 var(--display); letter-spacing: -0.02em; }
.tugla-alt { font-size: 0.84rem; color: var(--soluk); }
@media (max-width: 1000px) { .tuglalar { grid-template-columns: repeat(2, 1fr); } .tugla-kart:nth-child(5n) { border-right: 1px solid var(--kenar); } .tugla-kart:nth-child(2n) { border-right: 0; } .tugla-kart:nth-last-child(-n+5) { border-bottom: 1px solid var(--kenar); } .tugla-kart:nth-last-child(-n+2) { border-bottom: 0; } }
img[data-snap] { display: block; }
img[data-snap].yok { display: none; }

/* ---- İki mod ---- */
.modlar { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.mod { background: var(--yuzey); border: 1px solid var(--kenar); border-radius: var(--radius); padding: clamp(18px, 2.4vw, 28px); display: grid; gap: 16px; align-content: start; }
.mod-ekran { margin: 0; border: 1px solid var(--kenar-2); border-radius: 14px; background: var(--zemin); padding: 10px 10px 12px; display: grid; gap: 6px; }
.mod-ekran img { width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: contain; }
.mod-ekran figcaption { font-size: 0.86rem; color: var(--soluk); padding: 0 4px; }
.mod-ekran figcaption b { color: var(--metin); font-weight: 600; margin-right: 6px; }
.liste { display: grid; gap: 9px; }
.liste li { padding-left: 22px; position: relative; color: #C9D5E6; font-size: 0.98rem; }
.liste li::before { content: ""; position: absolute; left: 0; top: 11px; width: 8px; height: 8px; border-radius: 50%; background: var(--isik); box-shadow: 0 0 10px 1px rgba(91, 242, 230, 0.45); }
@media (max-width: 860px) { .modlar { grid-template-columns: 1fr; } }

/* ---- Nasıl başlanır: numaralı dikey akış, adımlar arası dolu hairline hat ---- */
.basla { border-top: 1px solid var(--kenar); }
.basla-adim { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: 16px clamp(24px, 4vw, 64px); align-items: center; padding: clamp(28px, 3.5vw, 48px) 0; border-bottom: 1px solid var(--kenar); }
.basla-sahne { width: 100%; max-width: 440px; aspect-ratio: 1 / 1; margin: 0 auto; }
.basla-sahne img { width: 100%; height: 100%; object-fit: contain; }
.basla-metin { max-width: 560px; }
.basla-no { display: block; font: 700 clamp(2rem, 4.2vw, 3.3rem)/1 var(--display); letter-spacing: -0.03em; font-variation-settings: "opsz" 96; color: var(--isik); margin-bottom: 14px; }
.basla-metin p { margin-top: 12px; color: #C9D5E6; }
.basla-eylemler { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px; margin-top: clamp(28px, 3.5vw, 44px); }
.basla-eylemler .not { flex-basis: 100%; }
.dugme-cerceve { background: transparent; color: var(--metin); box-shadow: inset 0 0 0 1px var(--kenar-2); }
.dugme-cerceve:hover { background: var(--yuzey-2); color: var(--metin); box-shadow: inset 0 0 0 1px var(--kenar-2); }
@media (max-width: 1099px) {
  .basla-adim { grid-template-columns: 1fr; gap: 6px; }
  .basla-sahne { max-width: 300px; margin: 0 0 0 -10px; }
  .basla-metin { max-width: var(--olcu); }
}

/* ---- Koç ---- */
.koc { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: 24px clamp(24px, 4vw, 64px); align-items: start; }
.koc-metin p { margin-top: 16px; font-size: 1.05rem; color: #C9D5E6; }
.konusma { background: var(--yuzey); border: 1px solid var(--kenar); border-radius: var(--radius); padding: clamp(16px, 2.4vw, 26px); display: grid; gap: 10px; position: relative; }
.konusma::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: radial-gradient(600px 240px at 85% 0%, rgba(138, 124, 255, 0.16), transparent 70%); }
.balon { position: relative; max-width: 82%; padding: 12px 16px; border-radius: 16px; font-size: 0.98rem; line-height: 1.5; }
.balon .kim { display: block; font-size: 0.72rem; letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 4px; color: var(--soluk); }
.cocuk { justify-self: start; background: var(--yuzey-2); border: 1px solid var(--kenar-2); border-bottom-left-radius: 6px; }
.koc-balon { justify-self: end; background: rgba(138, 124, 255, 0.14); border: 1px solid rgba(138, 124, 255, 0.4); border-bottom-right-radius: 6px; }
.koc-balon .kim { color: var(--menekse); }
.konusma .not { margin-top: 6px; }
@media (max-width: 860px) { .koc { grid-template-columns: 1fr; } }

/* ---- Cihaz ---- */
.cihaz { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: 24px clamp(24px, 4vw, 64px); align-items: center; background: var(--zemin-2); border: 1px solid var(--kenar); border-radius: var(--radius); padding: clamp(20px, 3.5vw, 44px); }
.cihaz-cizim img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: contain; }
.cihaz-metin p { margin-top: 14px; color: #C9D5E6; }
@media (max-width: 860px) { .cihaz { grid-template-columns: 1fr; } }

/* ---- Seyir planı ---- */
.rota { margin-bottom: -8px; }
.rota svg { width: 100%; height: auto; overflow: visible; }
.duraklar { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; }
.durak { background: var(--yuzey); border: 1px solid var(--kenar); border-radius: 14px; padding: 14px 14px 18px; display: grid; gap: 8px; align-content: start; }
.durak img { width: 100%; aspect-ratio: 1 / 1; height: auto; object-fit: contain; }
.durak.planda { background: transparent; border-style: dashed; border-color: var(--kenar-2); }
.durak h3 { font-size: 1.08rem; }
.durak p { font-size: 0.88rem; color: var(--soluk); }
.durak-sira { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--kenar-2); font: 600 0.8rem/1 var(--sans); color: var(--soluk); margin-right: 8px; vertical-align: 3px; }
.durak-durum { display: inline-flex; align-items: center; gap: 7px; font-size: 0.8rem; font-weight: 600; color: var(--metin); }
.durak-durum::before { content: ""; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--isik); }
.durak-durum.kurulu::before { background: var(--isik); box-shadow: 0 0 10px 1px rgba(91, 242, 230, 0.55); }
.durak-durum.suruyor::before { background: var(--kum); border-color: var(--kum); box-shadow: 0 0 10px 1px rgba(244, 217, 166, 0.55); }
.durak-durum.sirada::before { border-style: dashed; }
.durak-durum.planda::before { border-color: var(--soluk); }
.durak-durum.planda { color: var(--soluk); }
@media (prefers-reduced-motion: no-preference) { .durak-durum.suruyor::before { animation: nabiz 2.2s ease-in-out infinite; } }
@keyframes nabiz { 0%, 100% { box-shadow: 0 0 6px 0 rgba(244, 217, 166, 0.5); } 50% { box-shadow: 0 0 16px 4px rgba(244, 217, 166, 0.8); } }
.ufuk { margin-top: 36px; border-top: 1px solid var(--kenar); padding: clamp(20px, 3vw, 32px) 0 0; }
.fikirler { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px 24px; margin-top: 16px; }
.fikirler li { color: var(--soluk); font-size: 0.95rem; padding-left: 20px; position: relative; }
.fikirler li b { display: block; color: var(--metin); font-weight: 600; }
.fikirler li::before { content: ""; position: absolute; left: 0; top: 7px; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--soluk); }
.ufuk .not { margin-top: 18px; }
@media (max-width: 1100px) { .duraklar { grid-template-columns: repeat(4, 1fr); } .rota { display: none; } }
@media (max-width: 700px) { .duraklar { grid-template-columns: repeat(2, 1fr); } .durak { padding: 12px 10px 14px; } .durak h3 { font-size: 1rem; } }
@media (max-width: 360px) { .duraklar { grid-template-columns: 1fr; } }

/* ---- Durum ---- */
.durum { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 24px clamp(24px, 4vw, 64px); align-items: start; }
.durum-metin p { margin-top: 16px; font-size: 1.08rem; color: #C9D5E6; }
.eposta-metin { color: var(--soluk); }
.guven { display: grid; gap: 10px; }
.guven { gap: 0; } .guven li { padding: 14px 0; border-top: 1px solid var(--kenar); color: #C9D5E6; font-size: 0.98rem; } .guven li:last-child { border-bottom: 1px solid var(--kenar); }
.guven b { color: var(--metin); }
@media (max-width: 860px) { .durum { grid-template-columns: 1fr; } }

/* ---- Alt ---- */
.alt { max-width: 1360px; margin: clamp(64px, 9vw, 128px) auto 0; padding: 28px clamp(16px, 4vw, 56px) 44px; border-top: 1px solid var(--kenar); display: grid; gap: 6px; color: var(--soluk); }
.alt a { color: var(--metin); }
.alt-not { font-size: 0.86rem; }

/* ---- Hareket ---- */
.tugla { transform-box: fill-box; transform-origin: center; }
.canli .tugla { animation: otur 900ms var(--ease) both; animation-delay: calc(var(--i, 0) * 110ms); }
@keyframes otur { from { opacity: 0; transform: translateY(-46px); } to { opacity: 1; transform: translateY(0); } }
.gir { opacity: 0; transform: translateY(14px); }
.gir.goster { opacity: 1; transform: none; transition: opacity 700ms var(--ease), transform 700ms var(--ease); }
@media (prefers-reduced-motion: reduce) {
  .canli .tugla { animation: none; }
  .gir { opacity: 1; transform: none; }
  .dugme, .secenek, .menu a { transition: none; }
}