@font-face{font-family:'Plus Jakarta Sans';src:url('assets/plus-jakarta-sans.ttf') format('truetype');font-weight:200 800;font-display:swap}
:root{--page-gap:32px}
body,button,input,select,textarea{font-family:'Plus Jakarta Sans',Arial,sans-serif}
h1,h2{font-weight:700}h3,h4,h5,h6{font-weight:650}body{font-weight:400}button,summary,.button{font-weight:600}
header{width:calc(100% - var(--page-gap)*2);max-width:1280px;margin-inline:auto;padding:0;height:108px;gap:28px}
.logo{width:410px;height:88px;background-size:562px auto;background-position:center -61px}
nav{gap:28px;font-size:16px}nav a{padding-block:12px}
.menu{width:42px;height:42px;font-size:0;border:1px solid var(--line);border-radius:4px;cursor:pointer}
.menu:before{content:'';display:block;margin:auto;width:23px;height:23px;background:var(--ink);mask:url('assets/menu.svg') center/contain no-repeat}
.hero{width:calc(100% - var(--page-gap)*2);max-width:1280px;margin:8px auto 0;height:auto;aspect-ratio:auto;overflow:visible;background:white;isolation:isolate}
.hero:after{display:none}.hero-scene{position:relative;isolation:isolate;aspect-ratio:1942/809;overflow:hidden;background:#14738b}
.hero-image,#water-canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.surface-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;clip-path:polygon(0 0,100% 0,100% 57.5%,0 57.5%)}
.diver-layer,.rov-layer{position:absolute;inset:0;width:100%;height:100%;z-index:2;pointer-events:none;animation-play-state:var(--motion-state,running)!important;will-change:transform}
.diver-kneeling{transform-origin:24% 90%;animation:kneeling-breathe 5.5s ease-in-out infinite}
.diver-swimming{transform-origin:61% 82%;animation:swimmer-hover 6s ease-in-out infinite}
.rov-layer{transform-origin:41% 76%;animation:rov-hover 6.5s ease-in-out infinite}
@keyframes kneeling-breathe{0%,100%{transform:rotate(0deg)}50%{transform:rotate(.55deg)}}
@keyframes swimmer-hover{0%,100%{transform:translate(0,0) rotate(0deg)}50%{transform:translate(.2%,-.85%) rotate(-.7deg)}}
@keyframes rov-hover{0%,100%{transform:translate(0,0)}50%{transform:translate(.1%,-.45%)}}
@media(prefers-reduced-motion:reduce){.diver-layer,.rov-layer{animation:none!important}}
#water-canvas{z-index:1;opacity:0;pointer-events:none}.motion-ready #water-canvas{opacity:1}
.hero-scene:after{content:'';position:absolute;z-index:2;inset:0;background:linear-gradient(90deg,#00384b26,transparent 51%);pointer-events:none}
.hero-copy{z-index:4;left:34px;top:20%;bottom:auto;max-width:55%;text-shadow:0 2px 10px #06304790;pointer-events:none}
.hero-copy h1{font-size:40px;margin-bottom:10px}.hero-copy p{font-size:21px;margin-bottom:24px}.hero-copy .button{pointer-events:auto;padding:14px 20px;min-height:46px;font-size:16px;border:1px solid #31b1be}
.scene-note{position:absolute;z-index:4;bottom:15px;left:22px;font-size:13px;font-weight:600;color:white;text-shadow:0 1px 5px #003c49}
.motion-toggle{position:absolute;z-index:5;bottom:12px;right:12px;width:36px;height:36px;display:grid;place-items:center;border:1px solid #ffffff80;border-radius:4px;background:#fffffff0;color:var(--ink);cursor:pointer}
.motion-toggle span{width:18px;height:18px;display:block;background:currentColor;mask:url('assets/pause.svg') center/contain no-repeat}.motion-toggle[aria-pressed=true] span{mask-image:url('assets/play.svg')}
.disclaimer{position:static;display:block;margin-top:8px;text-align:right;font-size:12px;color:#637682;text-shadow:none;line-height:1.4}
.trust{max-width:1280px;width:calc(100% - var(--page-gap)*2);margin-inline:auto;padding:23px 0;border-bottom:1px solid var(--line)}
.trust>div{grid-template-columns:1fr;padding-inline:30px}.trust .number{display:none}.trust h2{font-size:20px}.trust p{font-size:14px}
.section:not(.projects){max-width:1280px;width:calc(100% - var(--page-gap)*2);margin-inline:auto;padding-inline:0}.section{padding-block:48px}.projects{padding-inline:max(var(--page-gap),calc((100% - 1280px)/2))}
.section-heading{margin-bottom:28px}.section-heading h2{font-size:30px}.intro{max-width:340px}.services{gap:24px}.service-photo{aspect-ratio:254/207;background-size:441.732% auto;background-position:3.69% 58.828%}.photo-1{background-position:34.79% 58.828%}.photo-2{background-position:65.78% 58.828%}.photo-3{background-position:96.66% 58.828%}
.services article{display:flex;flex-direction:column}.services p{font-size:16px}.detail-link{margin-top:auto}.project-grid article{grid-template-columns:44% 56%}.project-content{padding:22px}.project-content p{font-size:15px}.project-photo{min-height:290px}.contact{gap:36px}
footer{max-width:1280px;width:calc(100% - var(--page-gap)*2);margin-inline:auto;padding-inline:0}
@media(min-width:1500px){.hero{height:auto;aspect-ratio:auto}.hero-copy h1{font-size:40px}}
@media(max-width:1100px){.logo{width:350px;height:82px;background-size:480px auto;background-position:center -52px}nav{gap:20px;font-size:15px}.hero-copy{left:28px;top:17%}.hero-copy h1{font-size:32px}.hero-copy p{font-size:18px;margin-bottom:19px}.hero-copy .button{font-size:15px;min-height:42px;padding:12px 17px}.project-content{padding:18px}}
@media(max-width:850px){:root{--page-gap:24px}header{height:94px}.logo{width:320px;height:74px;background-size:438px auto;background-position:center -47px}.menu{display:block}nav{display:none;position:absolute;top:88px;left:auto;right:0;min-width:245px;padding:18px 24px;background:white;border:1px solid var(--line);box-shadow:0 10px 25px #08263d14}nav.open{display:flex;flex-direction:column;gap:4px}.hero-copy h1{font-size:27px}.hero-copy p{font-size:16px;margin-bottom:15px}.hero-copy .button{font-size:14px;padding:10px 14px}.hero-copy{top:15%;left:22px}.trust>div{padding-inline:18px}.trust h2{font-size:18px}.trust p{font-size:13px}.section-heading{gap:16px}.project-grid article{grid-template-columns:1fr}.project-photo{min-height:230px}.scene-note{font-size:12px;bottom:12px;left:15px}}
@media(max-width:560px){:root{--page-gap:16px}header{height:88px;gap:12px}.logo{width:calc(100% - 54px);max-width:300px;height:66px;background-size:390px auto;background-position:center -41px}.hero{height:auto;aspect-ratio:auto;margin-top:4px}.hero-copy{position:relative;inset:auto;max-width:none;margin:0 0 18px;padding:6px 0 0;color:var(--ink);text-shadow:none}.hero-copy h1{font-size:28px;line-height:1.14;margin-bottom:8px}.hero-copy p{font-size:17px;margin-bottom:15px}.hero-copy .button{font-size:14px;min-height:42px}.hero-scene{aspect-ratio:1942/809}.scene-note{font-size:12px;left:10px;bottom:8px}.motion-toggle{width:30px;height:30px;right:7px;bottom:6px}.motion-toggle span{width:16px;height:16px}.disclaimer{text-align:left;font-size:12px;margin-top:7px}.trust{padding-block:18px;gap:14px;grid-template-columns:1fr}.trust>div,.trust>div:first-child{padding:0;border:0;display:grid;grid-template-columns:145px 1fr;gap:10px;align-items:start}.trust h2{font-size:16px;margin:0}.trust p{font-size:13px}.section{padding-block:36px}.section-heading h2{font-size:27px}.services{gap:28px 16px}.services p{font-size:15px}.project-grid article{grid-template-columns:42% 58%}.project-content{padding:16px}.project-photo{min-height:270px}.project-content p{font-size:14px}.project-content h3{font-size:19px}footer{font-size:14px}.contact h2{font-size:27px}}
@media(max-width:360px){.hero-copy h1{font-size:24px}.logo{background-size:340px auto;background-position:center -34px}.project-grid article{grid-template-columns:1fr}.project-photo{min-height:200px}.trust>div{grid-template-columns:130px 1fr}.scene-note{display:none}}
.logo{height:auto;aspect-ratio:1240/264;position:relative;overflow:hidden;background-image:none}.logo img{position:absolute;width:134.839%;max-width:none;height:auto;left:-19.355%;top:-71.97%}
.logo img{clip-path:polygon(0 0,100% 0,100% 38%,29.5% 38%,29.5% 100%,0 100%)}
.logo:after{content:'Kıyı Mühendisliği';position:absolute;left:24%;top:65%;color:#00708b;font-size:14px;font-weight:600;line-height:1.2}
@media(max-width:850px){.logo:after{font-size:12px}}
.project-photo{aspect-ratio:255/180;min-height:0;align-self:center;background-size:440% auto;background-position:3.69% 93.29%}.project-photo-1{aspect-ratio:265/180;background-size:423.4% auto;background-position:66.4% 93.29%}
/* Expertise cards expand in place, including keyboard activation. */
.services{align-items:start}.service-details{width:100%;min-width:0}
.service-details summary{display:block;list-style:none;cursor:pointer;touch-action:manipulation}
.service-details summary::-webkit-details-marker{display:none}
.service-details summary:focus-visible{outline:3px solid #eaa338;outline-offset:5px}
.service-details summary:hover .service-toggle{text-decoration:underline}
.service-toggle{display:flex;align-items:center;gap:10px;min-height:44px;color:var(--accent);font-size:14px;font-weight:700}
.service-toggle-icon{font-size:21px;line-height:1;font-weight:400}.service-read-less{display:none}
.service-details[open] .service-read-more{display:none}.service-details[open] .service-read-less{display:inline}
.service-details[open] .service-toggle-icon{transform:rotate(45deg)}
.service-detail-content{padding:14px 0 0;border-top:1px solid var(--line);overflow-wrap:anywhere}
.service-detail-content p:last-child{margin-bottom:0}
/* Compact water treatment and design scope. */
.section.ro-section{border-top:1px solid var(--line);padding-block:32px}
.ro-compact{display:grid;grid-template-columns:240px minmax(0,1fr);align-items:center;gap:32px}
.ro-compact figure{margin:0}.ro-compact img{display:block;width:100%;height:150px;object-fit:cover}
.ro-compact figcaption{margin-top:7px;font-size:12px;line-height:1.4;color:#637682}
.ro-summary .eyebrow{margin:0 0 8px}.ro-summary h2{font-size:25px;line-height:1.2;margin:0 0 10px}
.ro-description{max-width:790px;margin:0;color:#536977;font-size:16px;line-height:1.6}
.ro-summary .detail-link{display:inline-block;margin-top:12px}
@media(max-width:850px){.ro-compact{grid-template-columns:190px minmax(0,1fr);gap:24px}.ro-compact img{height:135px}.ro-summary h2{font-size:23px}}
@media(max-width:560px){.section.ro-section{padding-block:28px}.ro-compact{grid-template-columns:1fr;gap:16px}.ro-compact img{height:135px}.ro-summary h2{font-size:22px}.ro-description{font-size:15px}}

/* Six expertise areas, with the company history retained above. */
.trust{grid-template-columns:1fr}.trust>div,.trust>div:first-child{padding-inline:0;border:0;display:flex;align-items:baseline;gap:22px}.trust h2{margin:0}
.services{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:32px}
.services .service-photo{height:auto;aspect-ratio:254/207}
.services .photo-4{background-image:url('assets/service-engineering-design.png');background-size:cover;background-position:center}

@media(max-width:850px){.services{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.trust>div,.trust>div:first-child{display:block}.trust h2{margin-bottom:5px}}
@media(max-width:400px){.services{grid-template-columns:1fr}.services .service-photo{aspect-ratio:16/10}}

/* Full-width experience band with a clear route to the project archive. */
.trust.history-band{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:32px;padding:24px 30px;margin-block:26px 0;background:#f1f7f9;border:1px solid #dce9ee;border-left:4px solid var(--accent)}
.trust.history-band>div{display:block;padding:0;border:0;min-width:0}
.history-band .history-date{padding-right:32px;border-right:1px solid #cfdee5}
.history-band .history-eyebrow{font-size:11px;letter-spacing:.09em;font-weight:700;color:var(--accent);margin:0 0 7px}
.history-band h2{display:flex;align-items:baseline;gap:10px;white-space:nowrap;margin:0}
.history-year{font-size:52px;line-height:1;font-weight:750;letter-spacing:-.045em;color:var(--ink)}
.history-since{font-size:18px;line-height:1.2;font-weight:500;color:#4d6777}
.history-band .history-heading{font-size:23px;font-weight:650;line-height:1.25;color:var(--ink);margin:0 0 9px}
.history-band .history-areas{font-size:14px;line-height:1.6;color:#536e7d;margin:0}.history-areas span{padding:0 5px;color:var(--accent)}
.history-link{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:46px;padding:11px 16px;border:1px solid #b9d4de;background:#fff;color:#007e99;font-size:14px;font-weight:700;white-space:nowrap}
.history-link:hover{background:#e4f1f5;border-color:var(--accent)}.history-link>span:last-child{font-size:22px;font-weight:400}
@media(max-width:1100px){.trust.history-band{gap:22px;padding:22px}.history-band .history-date{padding-right:22px}.history-year{font-size:44px}.history-band .history-heading{font-size:21px}.history-link{gap:12px;padding-inline:12px}}
@media(max-width:850px){.trust.history-band{grid-template-columns:auto minmax(0,1fr);gap:18px 24px}.history-link{grid-column:2;justify-self:start}.history-band .history-date{grid-row:span 2;align-self:stretch;display:flex;flex-direction:column;justify-content:center}.history-band h2{flex-direction:column;gap:4px}}
@media(max-width:560px){.trust.history-band{grid-template-columns:1fr;padding:20px;gap:17px;margin-top:20px}.history-band .history-date{grid-row:auto;display:block;padding:0 0 16px;border-right:0;border-bottom:1px solid #cfdee5}.history-band h2{flex-direction:row;gap:10px;margin:0}.history-year{font-size:46px}.history-band .history-heading{font-size:21px}.history-band .history-areas{font-size:14px}.history-link{grid-column:1;justify-self:stretch}.history-band .history-eyebrow{margin-bottom:8px}}

/* Selected frame: Katmanlı Lacivert, consistent across all six expertise cards. */
.services .service-details{padding:10px 10px 16px;background:var(--ink);border-radius:12px 12px 28px 12px;box-shadow:0 9px 0 #e3eef2}
.service-media{border:3px solid #fff;border-radius:5px;overflow:hidden}
.service-card-copy{padding:20px 10px 0}
.service-title{display:flex;gap:12px;align-items:baseline}
.service-index{font-size:11px;font-weight:600;color:#6ad8e2;flex-shrink:0}
.services .service-title h3{color:#fff;font-size:18px;line-height:1.4;font-weight:650;margin:0;overflow-wrap:anywhere}
.service-card-copy .service-toggle{justify-content:space-between;color:#8bdee8;font-size:12px;font-weight:650;margin-top:10px;min-height:44px}
.service-toggle-icon{display:grid;place-items:center;width:32px;height:32px;flex-shrink:0;border-radius:50%;background:#008da6;color:#fff;font-size:22px;font-weight:400;transition:transform .2s,background .2s}
.service-details summary:hover .service-toggle{text-decoration:none}.service-details summary:hover .service-toggle-icon{background:#00a6bd}
.services .service-detail-content{margin:10px 10px 0;padding:14px 0 0;border-top:1px solid #ffffff28;color:#d8e7ed}
.services .service-detail-content p{color:#d8e7ed;font-size:15px;line-height:1.8}
@media(max-width:600px){.services{grid-template-columns:minmax(0,1fr);row-gap:32px}.services .service-photo{aspect-ratio:254/207}.services .service-title h3{font-size:19px}}
@media(prefers-reduced-motion:reduce){.service-toggle-icon{transition:none}}

.services .photo-0{background-image:url('assets/service-intake-lifting.png');background-size:cover;background-position:center}

/* Detailed service scopes supplied by the client. */
.services .photo-5{background-image:url('assets/service-field-iout-screen.png');background-size:cover;background-position:center}
.services .service-scope-list{margin:0;padding:0 0 0 19px;list-style:disc;color:#d8e7ed;font-size:14px;line-height:1.7;overflow-wrap:anywhere}
.services .service-scope-list li{padding-left:3px;margin:0 0 12px}
.services .service-scope-list li:last-child{margin-bottom:0}
.services .service-scope-list li::marker{color:#8bdee8}

/* Standalone, conservatively enhanced expertise photographs. */
.services .photo-1{background-image:url('assets/service-pipeline-enhanced.png');background-size:cover;background-position:center}
.services .photo-2{background-image:url('assets/service-outfall-enhanced.png');background-size:cover;background-position:center}
.services .photo-3{background-image:url('assets/service-pretreatment-enhanced.png');background-size:cover;background-position:center}

/* Noticeable but restrained light drift and bubbles below the waterline. */
.underwater-atmosphere{position:absolute;inset:57.5% 0 0;overflow:hidden;z-index:3;pointer-events:none}
.underwater-light{position:absolute;inset:-15% -8%;background:repeating-linear-gradient(108deg,transparent 0 8%,#a2eeff24 10%,transparent 15% 23%);opacity:.45;animation:underwater-light-drift 7s ease-in-out infinite alternate;animation-play-state:var(--motion-state,running)}
.water-bubble{position:absolute;left:var(--x);top:70%;width:clamp(3px,.38vw,6px);aspect-ratio:1;border:1px solid #d6f8ffaa;border-radius:50%;background:#9aeaff16;opacity:0;animation:bubble-rise var(--duration) linear var(--delay) infinite;animation-play-state:var(--motion-state,running)}
@keyframes underwater-light-drift{from{transform:translateX(-2%);opacity:.3}to{transform:translateX(3%);opacity:.6}}
@keyframes bubble-rise{0%{transform:translate(0,0) scale(.65);opacity:0}15%{opacity:.65}80%{opacity:.4}100%{transform:translate(9px,-100px) scale(1.2);opacity:0}}
@media(prefers-reduced-motion:reduce){.underwater-atmosphere{display:none}}