/* ==========================================================================
   TUNA YERBİLİMLERİ — site stylesheet
   Palette: basalt ink / limestone stone / slate graphite (monochrome)
   Type:    Geist (display+body) · Geist Mono (labels)
   ========================================================================== */

/* ---- Self-hosted fonts (Geist variable, latin + latin-ext) -------------- */
@font-face{font-family:'Geist';font-style:normal;font-weight:400 600;font-display:swap;src:url('../fonts/geist-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;}
@font-face{font-family:'Geist';font-style:normal;font-weight:400 600;font-display:swap;src:url('../fonts/geist-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:400 500;font-display:swap;src:url('../fonts/geist-mono-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:400 500;font-display:swap;src:url('../fonts/geist-mono-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}

/* ---- Tokens -------------------------------------------------------------- */
:root{
  --ink:      #12181a;
  --ink-2:    #1a2225;
  --ink-3:    #263034;
  --stone:    #eff1ef;
  --stone-2:  #e4e8e5;
  --line:     #d2d8d3;
  --graphite: #232a2d;
  --body:     #46504f;
  --mute:     #6e7876;
  --paper:    #eceeec;
  --paper-mute:#9aa8a5;
  --line-d:   rgba(236,238,236,.14);
  --accent:    #37474b;
  --accent-dk: #232e31;
  --accent-lt: #a9bcc0;

  --font-display:'Geist',system-ui,sans-serif;
  --font-body:'Geist',system-ui,sans-serif;
  --font-mono:'Geist Mono','IBM Plex Mono',ui-monospace,monospace;

  --fs-hero: clamp(2.7rem, 6vw, 4.7rem);
  --fs-h2:   clamp(1.85rem, 3.4vw, 2.75rem);
  --fs-h3:   clamp(1.3rem, 2vw, 1.6rem);
  --fs-lede: clamp(1.05rem, 1.4vw, 1.2rem);

  --container: 1200px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --sp-section: clamp(4.5rem, 9vw, 7.5rem);
  --header-h: 78px;
  --radius: 3px;
  --ease: cubic-bezier(.22,.61,.21,1);
}

/* ---- Reset / base -------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html.menu-open{overflow:hidden}
body{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.7;
  color:var(--body);
  background:var(--stone);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,video{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
[id]{scroll-margin-top:calc(var(--header-h) + 24px)}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;color:var(--graphite);line-height:1.14;letter-spacing:-.022em}
strong{font-weight:600;color:var(--graphite)}

.container{width:min(var(--container),100% - 2*var(--gutter));margin-inline:auto}

/* ---- Utilities ----------------------------------------------------------- */
.kicker{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-mono);font-weight:500;font-size:.76rem;
  letter-spacing:.18em;text-transform:uppercase;color:var(--accent);
}
.kicker::before{content:"";width:16px;height:2px;background:var(--accent);flex:none}
.section{padding-block:var(--sp-section)}
.section-head{max-width:720px;margin-bottom:clamp(2.5rem,5vw,4rem)}
.section-head h2{font-size:var(--fs-h2);margin-top:.9rem}
.section-head .lede{margin-top:1.1rem}
.lede{font-size:var(--fs-lede);line-height:1.65;color:var(--body)}
.on-ink{--kicker-c:var(--accent-lt)}
.on-ink h1,.on-ink h2,.on-ink h3,.on-ink h4{color:var(--paper)}
.on-ink p{color:var(--paper-mute)}
.on-ink .kicker{color:var(--accent-lt)}
.on-ink .kicker::before{background:var(--accent-lt)}
.on-ink strong{color:var(--paper)}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.95em 1.7em;border-radius:var(--radius);
  font-weight:600;font-size:.95rem;letter-spacing:.01em;line-height:1.2;
  border:1px solid transparent;
  transition:background-color .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.btn svg{width:1.05em;height:1.05em;flex:none;transition:transform .25s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:var(--graphite)}
.on-ink .btn-solid,.hero .btn-solid{background:var(--paper);color:var(--ink)}
.on-ink .btn-solid:hover,.hero .btn-solid:hover{background:#fff}
.btn-ghost{border-color:rgba(20,26,28,.28);color:var(--graphite)}
.btn-ghost:hover{border-color:var(--graphite);background:rgba(20,26,28,.04)}
.on-ink .btn-ghost,.btn-ghost.light{border-color:rgba(236,238,236,.32);color:var(--paper)}
.on-ink .btn-ghost:hover,.btn-ghost.light:hover{border-color:var(--paper);background:rgba(236,238,236,.06)}

/* Text arrow link */
.tlink{
  display:inline-flex;align-items:center;gap:.5em;
  font-weight:600;font-size:.95rem;color:var(--graphite);
}
.tlink svg{width:1em;height:1em;transition:transform .25s var(--ease)}
.tlink:hover{color:var(--accent)}
.tlink:hover svg{transform:translateX(4px)}
.on-ink .tlink{color:var(--paper)}
.on-ink .tlink:hover{color:var(--accent-lt)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .75s var(--ease),transform .75s var(--ease);transition-delay:var(--d,0s)}
.reveal.is-in{opacity:1;transform:none}

/* Log-paper grid backdrop */
.grid-bg{position:relative}
.grid-bg::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:44px 44px;
  opacity:.35;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 18%,#000 82%,transparent);
          mask-image:linear-gradient(180deg,transparent,#000 18%,#000 82%,transparent);
}
.grid-bg > *{position:relative}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:border-color .3s,box-shadow .3s;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 4px 24px rgba(18,24,26,.06)}
.header-in{
  display:flex;align-items:center;gap:2rem;
  height:var(--header-h);
}
.brand{display:flex;align-items:center;gap:.8rem;flex:none}
.brand img{height:52px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--font-display);font-weight:600;font-size:1.02rem;letter-spacing:.01em;color:var(--graphite)}
.brand-sub{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--mute);margin-top:3px}
.site-nav{display:flex;align-items:center;gap:2rem;margin-left:auto}
.site-nav a{
  position:relative;font-weight:500;font-size:.95rem;color:var(--body);
  padding:.4em 0;transition:color .2s;
}
.site-nav a:hover{color:var(--graphite)}
.site-nav a[aria-current="page"]{color:var(--graphite)}
.site-nav a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent);
}
.header-tel{
  display:inline-flex;align-items:center;gap:.55em;
  font-family:var(--font-mono);font-weight:500;font-size:.86rem;letter-spacing:.02em;
  color:var(--graphite);white-space:nowrap;
  border:1px solid var(--line);border-radius:var(--radius);
  padding:.62em 1em;
  transition:border-color .25s,color .25s,background-color .25s;
}
.header-tel svg{width:.95em;height:.95em;color:var(--accent)}
.header-tel:hover{border-color:var(--accent);color:var(--accent)}

/* Burger */
.nav-toggle{display:none;position:relative;z-index:80;width:44px;height:44px;margin-left:auto;flex:none}
.nav-toggle span{
  position:absolute;left:10px;right:10px;height:2px;background:var(--graphite);
  transition:transform .3s var(--ease),opacity .2s,background-color .3s;
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
html.menu-open .nav-toggle span{background:var(--paper)}
html.menu-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
html.menu-open .nav-toggle span:nth-child(2){opacity:0}
html.menu-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* Mobile menu panel */
.mobile-menu{
  position:fixed;inset:0;z-index:70;background:var(--ink);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:calc(var(--header-h) + 2rem) var(--gutter) 2.5rem;
  opacity:0;visibility:hidden;transition:opacity .35s var(--ease),visibility 0s .35s;
}
html.menu-open .mobile-menu{opacity:1;visibility:visible;transition-delay:0s}
.mobile-menu nav{display:flex;flex-direction:column;gap:.6rem}
.mobile-menu nav a{
  font-family:var(--font-display);font-weight:600;font-size:clamp(1.9rem,7vw,2.6rem);
  color:var(--paper);padding:.35em 0;border-bottom:1px solid var(--line-d);
  display:block;
  opacity:0;transform:translateY(16px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
}
.mobile-menu nav a[aria-current="page"]{color:var(--accent-lt)}
html.menu-open .mobile-menu nav a{opacity:1;transform:none}
html.menu-open .mobile-menu nav a:nth-child(1){transition-delay:.08s}
html.menu-open .mobile-menu nav a:nth-child(2){transition-delay:.14s}
html.menu-open .mobile-menu nav a:nth-child(3){transition-delay:.2s}
html.menu-open .mobile-menu nav a:nth-child(4){transition-delay:.26s}
html.menu-open .mobile-menu nav a:nth-child(5){transition-delay:.32s}
.mobile-menu .menu-contact{margin-top:2.5rem;display:flex;flex-direction:column;gap:.7rem;opacity:0;transition:opacity .5s var(--ease) .34s}
html.menu-open .mobile-menu .menu-contact{opacity:1}
.mobile-menu .menu-contact a{font-family:var(--font-mono);font-size:.9rem;color:var(--paper-mute)}
.mobile-menu .menu-contact a:hover{color:var(--accent-lt)}

/* ==========================================================================
   Hero (home)
   ========================================================================== */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  background:var(--ink) url('../img/hero-poster.webp') center/cover no-repeat;
  min-height:min(860px, calc(100svh - var(--header-h)));
  display:flex;flex-direction:column;
}
.hero-media{position:absolute;inset:0;z-index:-2}
.hero-media video{width:100%;height:100%;object-fit:cover}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(to top, rgba(10,15,16,.92) 0%, rgba(10,15,16,.25) 34%, rgba(10,15,16,.18) 100%),
    linear-gradient(100deg, rgba(10,15,16,.9) 0%, rgba(10,15,16,.62) 46%, rgba(10,15,16,.28) 78%, rgba(10,15,16,.2) 100%);
}
.hero-main{flex:1;display:flex;align-items:center;padding-block:clamp(3.5rem,7vw,5rem)}
.hero-copy{max-width:760px}
.hero-copy .kicker{color:var(--accent-lt)}
.hero-copy .kicker::before{background:var(--accent-lt)}
.hero h1{
  margin-top:1.2rem;
  font-size:var(--fs-hero);font-weight:600;line-height:1.05;letter-spacing:-.02em;
  color:#fff;text-wrap:balance;
}
.hero h1 em{font-style:normal;color:inherit}
.hero .lede{margin-top:1.4rem;max-width:56ch;color:rgba(236,238,236,.82)}
.hero-cta{display:flex;flex-wrap:wrap;gap:.9rem;margin-top:2.2rem}

/* Seismograph trace */
.seismo{display:block;width:100%;height:64px;overflow:visible}
.seismo path{
  fill:none;stroke:var(--accent-lt);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;
  opacity:.9;
}
.hero .seismo{margin-bottom:-6px}

/* Hero fact strip */
.hero-facts{border-top:1px solid rgba(236,238,236,.16);background:rgba(10,15,16,.35);backdrop-filter:blur(6px)}
.hero-facts-in{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;
  padding-block:1.35rem;
}
.fact{display:flex;flex-direction:column;gap:.2rem}
.fact b{font-family:var(--font-display);font-weight:600;font-size:1.45rem;color:#fff;letter-spacing:-.01em}
.fact span{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(236,238,236,.6)}

/* ==========================================================================
   Sub-page hero
   ========================================================================== */
.page-hero{
  background:var(--stone);
  border-bottom:1px solid var(--line);
  padding:clamp(3.5rem,7vw,5.5rem) 0 clamp(2.75rem,5vw,4rem);
}
.page-hero h1{font-size:clamp(2.4rem,5vw,3.7rem);margin-top:1rem;letter-spacing:-.02em}
.page-hero .lede{margin-top:1.2rem;max-width:62ch}

/* ==========================================================================
   Definition split (home) & generic split
   ========================================================================== */
.split{display:grid;grid-template-columns:7fr 5fr;gap:clamp(2.5rem,5vw,5rem);align-items:start}
.split .figure{position:relative}
.split .figure img{width:100%;height:auto;border-radius:var(--radius)}
.figure figcaption{
  display:flex;align-items:center;gap:.7em;margin-top:.9rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);
}
.figure figcaption::before{content:"";width:14px;height:2px;background:var(--accent);flex:none}
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:1rem 2rem;margin-top:2.2rem}
.checklist li{
  position:relative;padding-left:1.6rem;
  font-size:.98rem;line-height:1.55;color:var(--body);
}
.checklist li::before{
  content:"";position:absolute;left:0;top:.52em;width:.75rem;height:.2rem;background:var(--accent);
}
.checklist li b{display:block;font-weight:600;color:var(--graphite)}

/* ==========================================================================
   Services (borehole index)
   ========================================================================== */
.section-ink{background:var(--ink)}
.svc-head{display:flex;align-items:end;justify-content:space-between;gap:2rem;flex-wrap:wrap;margin-bottom:clamp(2rem,4vw,3rem)}
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(.9rem,1.6vw,1.15rem)}
.svc-card{
  display:flex;flex-direction:column;
  padding:clamp(1.5rem,2.4vw,2rem);
  background:var(--ink-2);border:1px solid var(--line-d);
  border-radius:calc(var(--radius) + 4px);
  transition:transform .35s var(--ease),border-color .35s var(--ease),background-color .35s var(--ease);
}
.svc-card:hover{transform:translateY(-4px);border-color:rgba(169,188,192,.4);background:var(--ink-3)}
.svc-card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.2rem}
.svc-ico{width:30px;height:30px;color:var(--accent-lt);flex:none}
.svc-id{font-family:var(--font-mono);font-weight:500;font-size:.72rem;letter-spacing:.16em;color:var(--mute)}
.svc-name{display:block;font-family:var(--font-display);font-weight:500;font-size:clamp(1.1rem,1.7vw,1.3rem);letter-spacing:-.01em;color:var(--paper);line-height:1.28}
.svc-desc{display:block;margin-top:.55rem;font-size:.9rem;line-height:1.55;color:var(--paper-mute)}
.svc-card .chip{margin-left:.5em;vertical-align:.1em}
.svc-go{
  display:inline-flex;align-items:center;gap:.5em;margin-top:1.4rem;
  font-family:var(--font-mono);font-weight:500;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent-lt);
}
.svc-go svg{width:15px;height:15px;transition:transform .25s var(--ease)}
.svc-card:hover .svc-go svg{transform:translateX(4px)}
.chip{
  display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:.62rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent-lt);border:1px solid rgba(169,188,192,.4);border-radius:2px;
  padding:.35em .7em;white-space:nowrap;
}

/* ==========================================================================
   Process steps
   ========================================================================== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;counter-reset:step}
.step{position:relative;padding-top:1.6rem}
.step::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--line)}
.step::after{
  content:"";position:absolute;top:-3px;left:0;width:2.4rem;height:7px;background:var(--accent);
}
.step-idx{font-family:var(--font-mono);font-weight:500;font-size:.72rem;letter-spacing:.18em;color:var(--accent)}
.step h3{font-size:1.18rem;margin-top:.65rem}
.step p{font-size:.94rem;line-height:1.65;margin-top:.6rem;color:var(--body)}
.step svg{width:30px;height:30px;color:var(--graphite);margin-bottom:1rem;stroke-width:1.4}

/* ==========================================================================
   References marquee
   ========================================================================== */
.section-refs{background:var(--stone-2);border-block:1px solid var(--line);padding-block:clamp(3.5rem,7vw,5.5rem)}
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.marquee + .marquee{margin-top:1.9rem}
.marquee-track{display:flex;align-items:center;gap:3.2rem;width:max-content;animation:marq 70s linear infinite}
.marquee.rev .marquee-track{animation-direction:reverse}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marq{to{transform:translateX(-50%)}}

/* Logo tiles (marquee + grid) */
.marquee .marquee-track{gap:1rem;animation-duration:60s}
.ref-tile{
  flex:none;display:flex;align-items:center;justify-content:center;
  height:86px;min-width:180px;padding:1rem 1.7rem;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
}
.ref-tile img{
  max-height:48px;width:auto;max-width:160px;object-fit:contain;
  filter:grayscale(1);opacity:.72;
  transition:filter .35s var(--ease),opacity .35s var(--ease);
}
.ref-tile:hover img{filter:none;opacity:1}
.ref-tile.ref-text{
  font-family:var(--font-mono);font-weight:500;font-size:.85rem;letter-spacing:.14em;
  color:var(--mute);text-transform:uppercase;transition:color .3s;
}
.ref-tile.ref-text:hover{color:var(--graphite)}
.ref-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:1rem}
.ref-grid .ref-tile{height:112px;min-width:0;width:100%}
.ref-grid .ref-tile img{max-height:58px;max-width:72%}

/* Selected projects (references page) */
.proj-list{border-top:1px solid var(--line)}
.proj-row{
  display:grid;grid-template-columns:200px 1fr auto;gap:1.5rem;align-items:center;
  padding:1.35rem .5rem;border-bottom:1px solid var(--line);
}
.proj-loc{font-family:var(--font-mono);font-size:.74rem;font-weight:500;letter-spacing:.1em;color:var(--accent);text-transform:uppercase}
.proj-name{font-size:.98rem;color:var(--graphite);line-height:1.55}
.proj-client{
  font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;
  color:var(--mute);white-space:nowrap;
  border:1px solid var(--line);background:#fff;border-radius:2px;padding:.5em .9em;
}

/* Company timeline (about) */
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:2.2rem}
.tl-item{border-top:2px solid var(--accent);padding-top:.9rem}
.tl-item b{font-family:var(--font-mono);font-weight:500;font-size:.78rem;letter-spacing:.14em;color:var(--accent);display:block}
.tl-item h3{font-size:1.02rem;margin-top:.45rem}
.tl-item p{font-size:.88rem;line-height:1.55;margin-top:.35rem}

/* Machine park spec list (about, on ink) */
.spec-list{border-top:1px solid var(--line-d)}
.spec-row{
  display:grid;grid-template-columns:96px 1fr;gap:1.6rem;align-items:baseline;
  padding:1.3rem .5rem;border-bottom:1px solid var(--line-d);
}
.spec-qty{font-family:var(--font-display);font-weight:600;font-size:1.55rem;color:var(--accent-lt);letter-spacing:-.01em}
.spec-row h3{font-family:var(--font-display);font-weight:500;font-size:1.08rem;color:var(--paper);letter-spacing:0}
.spec-row p{font-size:.88rem;margin-top:.25rem}

/* ==========================================================================
   Gallery strip
   ========================================================================== */
/* Saha kaydı film şeridi — uniform tiles on a snap rail, aligned to the page grid */
.sstrip{--rail-pad:max(var(--gutter),calc((100% - var(--container)) / 2));margin-top:clamp(2rem,4vw,3rem)}
.ss-track{
  position:relative;
  display:flex;align-items:flex-start;gap:clamp(.9rem,1.6vw,1.4rem);
  overflow-x:auto;overflow-y:hidden;
  padding-inline:var(--rail-pad);
  scrollbar-width:none;-ms-overflow-style:none;
  cursor:grab;
}
.ss-track:active{cursor:grabbing}
.ss-track::-webkit-scrollbar{display:none}

.ss-slide{
  flex:none;margin:0;
  width:clamp(220px,68vw,320px);
  cursor:pointer;
}
@media (min-width:700px){.ss-slide{width:clamp(240px,25vw,320px)}}
.ss-slide img{
  display:block;width:100%;aspect-ratio:4/5;object-fit:cover;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--stone);
  transition:border-color .3s var(--ease);
  pointer-events:none;-webkit-user-drag:none;user-select:none;
}
.ss-slide:hover img,.ss-track:focus-visible .ss-slide img{border-color:var(--accent)}
.ss-slide figcaption{
  display:flex;gap:.7em;margin-top:.7rem;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--mute);line-height:1.5;
}
.ss-slide figcaption i{font-style:normal;color:var(--accent);flex:none}

/* Position readout — a seismograph-thin line */
.ss-controls{margin-top:clamp(1.4rem,3vw,2rem)}
.ss-progress{height:1px;background:var(--line);position:relative}
.ss-progress span{position:absolute;top:-0.5px;left:0;height:2px;width:0;background:var(--accent)}

/* Lightbox */
.lightbox{border:0;padding:0;background:transparent;max-width:min(1100px,94vw);width:auto;margin:auto}
.lightbox::backdrop{background:rgba(10,14,15,.9)}
.lightbox figure{position:relative;margin:0}
.lightbox img{max-height:82vh;width:auto;max-width:100%;margin-inline:auto;border-radius:var(--radius)}
.lightbox figcaption{
  margin-top:.9rem;text-align:center;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--paper-mute);
}
.lightbox .lb-close{
  position:absolute;top:12px;right:12px;width:40px;height:40px;border-radius:50%;
  background:var(--accent);color:#fff;display:grid;place-items:center;
  transition:background-color .2s;
}
.lightbox .lb-close:hover{background:var(--ink)}
.lightbox .lb-close svg{width:18px;height:18px}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:rgba(18,24,26,.72);color:var(--paper);display:grid;place-items:center;transition:background-color .2s}
.lb-nav:hover{background:var(--accent)}
.lb-nav svg{width:20px;height:20px}
.lb-prev{left:10px}
.lb-next{right:10px}

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band{position:relative;background:var(--ink);overflow:hidden}
.cta-band .seismo{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);height:180px;opacity:.14;pointer-events:none}
.cta-in{position:relative;text-align:center;padding-block:clamp(4.5rem,9vw,7rem);display:flex;flex-direction:column;align-items:center;gap:1.3rem}
.cta-in h2{font-size:var(--fs-h2);max-width:22ch;text-wrap:balance}
.cta-tel{
  font-family:var(--font-mono);font-weight:500;letter-spacing:.04em;
  font-size:clamp(1.5rem,3.4vw,2.3rem);color:var(--paper);
  transition:color .25s;
}
.cta-tel:hover{color:var(--accent-lt)}
.cta-in .btn-row{display:flex;gap:.9rem;flex-wrap:wrap;justify-content:center;margin-top:.5rem}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{background:var(--ink-2);color:var(--paper-mute)}
.footer-main{
  display:grid;grid-template-columns:2.2fr 1fr 1.4fr 1.6fr;gap:clamp(2rem,4vw,4rem);
  padding-block:clamp(3.5rem,6vw,5rem);
}
.footer-brand .brand-name{color:var(--paper);font-size:1.15rem}
.footer-brand .brand-sub{color:var(--paper-mute)}
.footer-brand p{font-size:.92rem;line-height:1.7;margin-top:1.1rem;max-width:34ch}
.footer-social{display:flex;gap:.8rem;margin-top:1.4rem}
.footer-social a{
  width:40px;height:40px;border:1px solid var(--line-d);border-radius:var(--radius);
  display:grid;place-items:center;color:var(--paper-mute);
  transition:color .25s,border-color .25s;
}
.footer-social a:hover{color:var(--accent-lt);border-color:var(--accent-lt)}
.footer-social svg{width:18px;height:18px}
.site-footer h4{
  font-family:var(--font-mono);font-weight:500;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--paper);margin-bottom:1.2rem;
}
.footer-col ul{display:flex;flex-direction:column;gap:.55rem}
.footer-col a{font-size:.92rem;color:var(--paper-mute);transition:color .2s}
.footer-col a:hover{color:var(--accent-lt)}
.footer-col address{font-style:normal;font-size:.92rem;line-height:1.7}
.footer-col address a{display:block;margin-top:.5rem}
.footer-col .f-tel{font-family:var(--font-mono);color:var(--paper)}
.footer-bottom{border-top:1px solid var(--line-d)}
.footer-bottom-in{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding-block:1.4rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--paper-mute);
}

/* ==========================================================================
   Services page
   ========================================================================== */
.svc-detail{border-bottom:1px solid var(--line);padding-block:clamp(2.75rem,5vw,4rem)}
.svc-detail:last-of-type{border-bottom:0}
.svc-detail-grid{display:grid;grid-template-columns:260px 1fr;gap:clamp(1.5rem,4vw,4rem);align-items:start}
.svc-detail-grid.has-media{grid-template-columns:260px minmax(0,1fr) 280px}
.svc-media{margin:0}
.svc-media img{display:block;width:100%;aspect-ratio:1;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}
.svc-detail .svc-id{font-size:1rem;color:var(--accent)}
.svc-detail h3{font-size:var(--fs-h3);margin-top:.6rem;letter-spacing:-.01em}
.svc-detail p + p{margin-top:1rem}

/* Saha kabiliyeti band (hizmetler) */
.field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1rem,2.5vw,1.6rem)}
.field-grid img{display:block;width:100%;aspect-ratio:1;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}
.section-ink .field-grid img{border-color:var(--line-d)}
.on-ink .figure figcaption{color:var(--paper-mute)}
.on-ink .figure figcaption::before{background:var(--accent-lt)}
.svc-tags{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.4rem}
.svc-tags .chip{color:var(--accent);border-color:rgba(55,71,75,.35);background:#fff}

/* Geophysics methods */
.geo-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-d);border:1px solid var(--line-d);border-radius:var(--radius);overflow:hidden}
.geo-cell{background:var(--ink);padding:1.6rem 1.7rem;transition:background-color .3s}
.geo-cell:hover{background:var(--ink-2)}
.geo-cell h4{font-family:var(--font-display);font-weight:500;font-size:1.05rem;color:var(--paper);display:flex;align-items:center;gap:.7rem}
.geo-cell h4 svg{width:20px;height:20px;color:var(--accent-lt);flex:none}
.geo-cell p{font-size:.88rem;line-height:1.6;margin-top:.5rem}

/* FAQ */
.faq{max-width:820px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;width:100%;
  padding:1.4rem 0;text-align:left;
  font-family:var(--font-display);font-weight:500;font-size:1.12rem;color:var(--graphite);
  transition:color .2s;
}
.faq-q:hover{color:var(--accent)}
.faq-q .faq-ico{flex:none;width:22px;height:22px;color:var(--accent);transition:transform .35s var(--ease)}
.faq-q[aria-expanded="true"] .faq-ico{transform:rotate(45deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s var(--ease)}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden}
.faq-a p{padding-bottom:1.4rem;max-width:64ch}

/* ==========================================================================
   About page
   ========================================================================== */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:2.5rem}
.stat-cell{background:var(--stone);padding:1.8rem 1.6rem}
.stat-cell b{font-family:var(--font-display);font-weight:600;font-size:clamp(1.9rem,3.4vw,2.6rem);color:var(--graphite);letter-spacing:-.02em;display:block}
.stat-cell b i{font-style:normal;color:var(--accent)}
.stat-cell b span{font:inherit;color:inherit;letter-spacing:inherit;display:inline;margin:0}
.stat-cell > span{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--mute);display:block;margin-top:.4rem}
.mv-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}
.mv-card{
  background:var(--ink);border-radius:var(--radius);padding:clamp(1.8rem,3.5vw,2.8rem);
  display:flex;flex-direction:column;gap:1rem;
}
.mv-card .kicker{color:var(--accent-lt)}
.mv-card .kicker::before{background:var(--accent-lt)}
.mv-card p{font-family:var(--font-display);font-weight:500;font-size:clamp(1.15rem,1.9vw,1.45rem);line-height:1.4;color:var(--paper);letter-spacing:-.01em}
.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.principle{border-top:1px solid var(--line);padding-top:1.4rem}
.principle .p-idx{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;color:var(--accent)}
.principle h3{font-size:1.15rem;margin-top:.6rem}
.principle p{font-size:.94rem;margin-top:.6rem}

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(2.5rem,5vw,5rem);align-items:start}
.contact-cards{display:flex;flex-direction:column;gap:1rem}
.c-card{
  display:flex;gap:1.1rem;align-items:flex-start;
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  padding:1.4rem 1.5rem;
  transition:border-color .25s;
}
.c-card:hover{border-color:var(--accent)}
.c-card .c-ico{
  flex:none;width:42px;height:42px;border-radius:var(--radius);
  background:var(--stone);display:grid;place-items:center;color:var(--accent);
}
.c-card .c-ico svg{width:20px;height:20px}
.c-card h3{font-size:.78rem;font-family:var(--font-mono);font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--mute)}
.c-card .c-val{font-family:var(--font-mono);font-weight:500;font-size:1.02rem;color:var(--graphite);margin-top:.35rem;display:block;word-break:break-word}
a.c-val:hover{color:var(--accent)}
.c-card p{font-size:.95rem;line-height:1.65;margin-top:.35rem;color:var(--body)}
.c-card .tlink{margin-top:.6rem;font-size:.88rem}

/* Form */
.form-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.6rem,3.5vw,2.6rem)}
.form-panel h2{font-size:1.45rem}
.form-panel .form-note{font-size:.92rem;margin-top:.5rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-top:1.8rem}
.field{display:flex;flex-direction:column;gap:.45rem}
.field.wide{grid-column:1 / -1}
.field label{font-weight:500;font-size:.9rem;color:var(--graphite)}
.field label i{font-style:normal;color:var(--accent)}
.field input,.field select,.field textarea{
  font:inherit;color:var(--graphite);
  background:var(--stone);border:1px solid var(--line);border-radius:var(--radius);
  padding:.8em 1em;width:100%;
  transition:border-color .2s,box-shadow .2s,background-color .2s;
}
.field textarea{min-height:150px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);background:#fff;
  box-shadow:0 0 0 3px rgba(55,71,75,.14);
}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-top:.4rem}
.form-actions small{font-size:.8rem;color:var(--mute);max-width:38ch}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}

/* Map */
.map-wrap{margin-top:clamp(2.5rem,5vw,4rem);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:relative}
.map-wrap iframe{
  display:block;width:100%;height:440px;border:0;
  filter:grayscale(1) contrast(1.04);
  transition:filter .5s var(--ease);
}
.map-wrap:hover iframe{filter:none}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .footer-main{grid-template-columns:1fr 1fr}
  .svc-detail-grid,.svc-detail-grid.has-media{grid-template-columns:200px 1fr}
  .svc-media{grid-column:2;max-width:440px}
  .steps{grid-template-columns:1fr 1fr;gap:2.5rem 2rem}
}
@media (max-width:860px){
  .site-nav,.header-tel{display:none}
  .nav-toggle{display:block}
  .split{grid-template-columns:1fr}
  .split .figure{order:-1;max-width:560px}
  .contact-grid{grid-template-columns:1fr}
  .mv-grid{grid-template-columns:1fr}
  .principles{grid-template-columns:1fr;gap:1.2rem}
  .geo-grid{grid-template-columns:1fr}
  .svc-detail-grid,.svc-detail-grid.has-media{grid-template-columns:1fr;gap:1rem}
  .svc-media{grid-column:auto;margin-top:.5rem}
  .footer-main{grid-template-columns:1fr;gap:2.5rem}
}
@media (max-width:640px){
  .checklist{grid-template-columns:1fr}
  .field-grid{grid-template-columns:1fr}
  .proj-row{grid-template-columns:1fr;gap:.45rem;padding-block:1.1rem}
  .proj-client{justify-self:start}
  .timeline{grid-template-columns:1fr}
  .spec-row{grid-template-columns:64px 1fr;gap:1rem}
  .steps{grid-template-columns:1fr;gap:2rem}
  .hero-facts-in{grid-template-columns:1fr 1fr;gap:1.2rem}
  .fact:nth-child(3){grid-column:1 / -1}
  .fact b{font-size:1.2rem}
  .svc-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .brand img{height:44px}
  .brand-text{display:none}
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .marquee-track{animation:none}
  .marquee{mask-image:none;-webkit-mask-image:none;overflow-x:auto}
  .seismo path{stroke-dashoffset:0 !important;stroke-dasharray:none !important}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
}