/* ===== Sonic Booster — styles.css ===== */
:root{
  --blue:#1763ff;
  --blue-2:#3b86ff;
  --blue-3:#7db0ff;
  --red:#ed1c24;
  --red-2:#ff343b;
  --ink:#07080d;
  --ink-2:#0c0e16;
  --ink-3:#11141f;
  --card:#0f1320;
  --line:#1d2333;
  --white:#f3f6ff;
  --muted:#98a2bd;
  --maxw:1180px;
  --r:18px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Saira",system-ui,sans-serif;
  background:var(--ink);
  color:var(--white);
  line-height:1.55;
  overflow-x:hidden;
  position:relative;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
em{font-style:normal}
.t-blue{color:var(--blue-2)}
.t-red{color:var(--red-2)}

/* ===== Background FX ===== */
.bg-grid{
  position:fixed;inset:0;z-index:-3;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(23,99,255,.18), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(237,28,36,.12), transparent 55%),
    var(--ink);
}
.bg-streaks{
  position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.5;
  background-image:repeating-linear-gradient(115deg,
    transparent 0 38px,
    rgba(23,99,255,.05) 38px 39px,
    transparent 39px 80px);
  mask-image:linear-gradient(180deg,#000,transparent 70%);
}

/* ===== Wordmark ===== */
.wordmark{
  font-family:"Saira Condensed",sans-serif;
  font-style:italic;font-weight:900;
  line-height:.82;letter-spacing:-.5px;display:inline-flex;flex-direction:column;
  transform:skewX(-6deg);
}
.wm-sonic{color:var(--blue-2);text-shadow:0 2px 0 #06122e, 0 0 18px rgba(23,99,255,.45)}
.wm-booster{color:var(--red-2);text-shadow:0 2px 0 #2e0608, 0 0 18px rgba(237,28,36,.4)}
.wordmark--sm{font-size:26px}
.wordmark--sm .wm-sonic{font-size:26px}
.wordmark--sm .wm-booster{font-size:26px}

/* ===== Logo image ===== */
.brand-logo{height:38px;width:auto;display:block;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}
.brand-logo--footer{height:34px}

/* ===== Buttons ===== */
.btn{
  --bg:var(--blue);
  display:inline-flex;align-items:center;gap:9px;
  font-family:"Saira Condensed",sans-serif;font-weight:800;font-style:italic;
  font-size:16px;letter-spacing:.4px;text-transform:uppercase;
  padding:13px 22px;border-radius:12px;cursor:pointer;border:0;
  background:var(--bg);color:#fff;
  transition:transform .15s ease, box-shadow .25s ease, filter .2s ease;
  box-shadow:0 8px 26px rgba(0,0,0,.45);
}
.btn:hover{transform:translateY(-2px)}
.btn--lg{font-size:18px;padding:16px 28px}
.btn--blue{background:linear-gradient(135deg,var(--blue),#0c3fc4);box-shadow:0 10px 30px rgba(23,99,255,.4)}
.btn--blue:hover{box-shadow:0 14px 38px rgba(23,99,255,.55)}
.btn--ig{background:linear-gradient(135deg,#ff343b,#c10c13);box-shadow:0 10px 30px rgba(237,28,36,.4)}
.btn--ig:hover{box-shadow:0 14px 38px rgba(237,28,36,.55)}
.btn--ghost{background:transparent;border:1.5px solid var(--line);box-shadow:none}
.btn--ghost:hover{border-color:var(--blue-2);background:rgba(23,99,255,.08)}
.ig-ic{width:20px;height:20px;fill:currentColor;flex:none}

/* ===== Navbar ===== */
.nav{position:sticky;top:0;z-index:50;transition:background .3s ease, box-shadow .3s ease;
  backdrop-filter:blur(8px);border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(7,8,13,.82);border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(0,0,0,.4)}
.nav-inner{display:flex;align-items:center;gap:18px;height:72px}
.brand{flex:none}
.nav-links{display:flex;gap:26px;margin-left:auto;font-weight:600;font-size:15px}
.nav-links a{color:var(--muted);position:relative;transition:color .2s}
.nav-links a:hover{color:#fff}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--blue-2);transition:width .25s}
.nav-links a:hover::after{width:100%}
.nav-cta{margin-left:4px;font-size:14px;padding:10px 16px}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;margin-left:auto;padding:8px}
.nav-burger span{width:24px;height:2.5px;background:#fff;border-radius:2px;transition:.25s}
.nav-burger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;padding:64px 0 40px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;min-height:78vh}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:"Saira Condensed";font-weight:700;
  font-size:13px;letter-spacing:1.5px;color:var(--blue-3);text-transform:uppercase;
  border:1px solid var(--line);padding:7px 14px;border-radius:100px;background:rgba(23,99,255,.06)}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--red-2);box-shadow:0 0 10px var(--red-2);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero-title{
  font-family:"Saira Condensed";font-style:italic;font-weight:900;
  font-size:clamp(38px,6vw,76px);line-height:.92;letter-spacing:-1px;
  margin:20px 0 18px;transform:skewX(-4deg);
  text-shadow:0 6px 30px rgba(0,0,0,.5);
}
.hero-sub{font-size:clamp(16px,1.6vw,19px);color:var(--muted);max-width:560px}
.hero-sub strong{color:var(--white)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0 30px}
.hero-stats{list-style:none;display:flex;gap:34px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:22px}
.hero-stats b{display:block;font-family:"Saira Condensed";font-weight:900;font-style:italic;font-size:30px;color:#fff}
.hero-stats span{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

/* Hero visual / product */
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center;min-height:480px}
.glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;z-index:0}
.glow--blue{width:340px;height:340px;background:var(--blue);left:0;top:30px}
.glow--red{width:240px;height:240px;background:var(--red);right:10px;bottom:20px;opacity:.4}
.product-wrap{position:relative;z-index:2;animation:float 5s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
.product-rings{position:absolute;inset:-40px;border-radius:50%;
  background:conic-gradient(from 0deg, transparent, rgba(23,99,255,.5), transparent 40%, rgba(237,28,36,.4), transparent 70%);
  filter:blur(8px);animation:spin 9s linear infinite;opacity:.6;z-index:-1}
@keyframes spin{to{transform:rotate(360deg)}}
.product-can{width:min(340px,80%);filter:drop-shadow(0 30px 50px rgba(0,0,0,.6))}
.product-img{width:auto;max-width:90%;max-height:460px;height:auto;display:block;filter:drop-shadow(0 30px 55px rgba(0,0,0,.7)) drop-shadow(0 0 45px rgba(23,99,255,.3))}
.can-tag{font-family:"Saira Condensed";font-weight:700;font-size:11px;letter-spacing:1px;fill:var(--blue-3)}
.can-sonic{font-family:"Saira Condensed";font-style:italic;font-weight:900;font-size:34px;fill:#fff}
.can-booster{font-family:"Saira Condensed";font-style:italic;font-weight:900;font-size:30px;fill:var(--red-2)}
.can-sub{font-family:"Saira Condensed";font-weight:700;font-size:11px;letter-spacing:1px;fill:#c6d2ee}
.can-vol{font-family:"Saira Condensed";font-style:italic;font-weight:900;font-size:34px;fill:#fff}

/* ===== Hero yakıt dolum animasyonu ===== */
.fuel-wrap{position:relative;z-index:2;width:min(430px,94%);animation:float 6s ease-in-out infinite}
.fuel-scene{width:100%;height:auto;overflow:visible;filter:drop-shadow(0 26px 46px rgba(0,0,0,.55))}
.fs-ring{transform-box:fill-box;transform-origin:center;animation:espin 16s linear infinite}
.fs-prog{animation:fs-gauge 3s ease-out forwards}
.fs-liquid-fill{animation:fs-fill 3s ease-out forwards}
.fs-liquid-slosh{animation:fs-slosh 3.6s ease-in-out infinite}
.fs-wave{animation:fs-waveX 2.4s linear infinite}
.fs-bubble{transform-box:fill-box;transform-origin:center;animation:fs-bubble 3s ease-in infinite}
.fs-stream{stroke-dasharray:6 9;animation:fs-flow .5s linear infinite}
.fs-streamfill{animation:fs-pulse 1.4s ease-in-out infinite}
.fs-drop{transform-box:fill-box;transform-origin:center;animation:fs-drop 1.2s ease-in infinite}
.fs-spark{transform-box:fill-box;transform-origin:center;animation:fs-spark 1.7s ease-in-out infinite}
.fs-bolt{transform-box:fill-box;transform-origin:center;animation:fs-spark 2.1s ease-in-out infinite}
.fs-nozzle{transform-box:fill-box;transform-origin:center;animation:fs-nozzle 3.6s ease-in-out infinite}
.fs-streak{transform-box:fill-box;transform-origin:center;animation:fs-streak 2.4s linear infinite}
@keyframes espin{to{transform:rotate(360deg)}}
@keyframes fs-gauge{from{stroke-dashoffset:100}to{stroke-dashoffset:27}}
@keyframes fs-fill{from{transform:translateY(150px)}to{transform:translateY(0)}}
@keyframes fs-slosh{0%,100%{transform:translateY(3px)}50%{transform:translateY(-3px)}}
@keyframes fs-waveX{from{transform:translateX(-44px)}to{transform:translateX(0)}}
@keyframes fs-bubble{0%{transform:translateY(0) scale(.6);opacity:0}20%{opacity:.85}100%{transform:translateY(-82px) scale(1);opacity:0}}
@keyframes fs-flow{to{stroke-dashoffset:-45}}
@keyframes fs-pulse{0%,100%{opacity:.75}50%{opacity:1}}
@keyframes fs-drop{0%{transform:translateY(0);opacity:0}12%{opacity:1}100%{transform:translateY(54px);opacity:0}}
@keyframes fs-spark{0%,100%{transform:scale(0);opacity:0}50%{transform:scale(1);opacity:1}}
@keyframes fs-nozzle{0%,100%{transform:translateY(0)}50%{transform:translateY(-2.5px)}}
@keyframes fs-streak{0%{transform:translateX(0);opacity:0}30%{opacity:.5}100%{transform:translateX(70px);opacity:0}}
.fs-bottle{transform-box:fill-box;transform-origin:50% 92%;animation:fs-wobble 3.2s ease-in-out infinite}
.fs-neckglow{animation:fs-neck 2.4s ease-in-out infinite}
@keyframes fs-wobble{0%,100%{transform:rotate(-2.5deg)}50%{transform:rotate(2.5deg)}}
@keyframes fs-neck{0%,100%{opacity:.5}50%{opacity:.95}}
.fs-glim{transform-box:fill-box;transform-origin:center;animation:fs-glim 2.4s ease-out infinite}
@keyframes fs-glim{0%{transform:translateY(6px) scale(0);opacity:0}25%{opacity:1}60%{transform:translateY(-14px) scale(1.1);opacity:.9}100%{transform:translateY(-30px) scale(.4);opacity:0}}

.scroll-cue{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);width:26px;height:42px;border:2px solid var(--line);border-radius:14px;display:flex;justify-content:center;padding-top:8px}
.scroll-cue span{width:4px;height:8px;background:var(--blue-2);border-radius:2px;animation:scroll 1.6s infinite}
@keyframes scroll{0%{transform:translateY(0);opacity:1}100%{transform:translateY(14px);opacity:0}}

/* ===== Marquee ===== */
.marquee{overflow:hidden;border-block:1px solid var(--line);background:linear-gradient(90deg,rgba(23,99,255,.08),rgba(237,28,36,.08));padding:14px 0}
.marquee-track{display:flex;gap:26px;white-space:nowrap;width:max-content;animation:marq 26s linear infinite;
  font-family:"Saira Condensed";font-style:italic;font-weight:800;font-size:18px;letter-spacing:.5px;text-transform:uppercase}
.marquee-track i{color:var(--red-2);font-style:normal}
.marquee-track span{color:#dfe6f7}
@keyframes marq{to{transform:translateX(-50%)}}

/* ===== Sections ===== */
.section{padding:88px 0;position:relative}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head--center{margin-inline:auto;text-align:center}
.kicker{display:inline-block;font-family:"Saira Condensed";font-weight:800;font-style:italic;
  font-size:14px;letter-spacing:2px;text-transform:uppercase;color:var(--blue-3);margin-bottom:14px}
.kicker--red{color:var(--red-2)}
.kicker--blue{color:var(--blue-3)}
.sec-title{font-family:"Saira Condensed";font-style:italic;font-weight:900;
  font-size:clamp(30px,4.4vw,52px);line-height:1;letter-spacing:-.5px;transform:skewX(-3deg)}
.sec-lead{color:var(--muted);font-size:18px;margin-top:18px}
.sec-lead strong{color:#fff}

/* ===== Problem ===== */
.problem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.prob-card{background:linear-gradient(180deg,var(--card),#0a0d16);border:1px solid var(--line);
  border-radius:var(--r);padding:26px 22px;transition:transform .2s,border-color .2s}
.prob-card:hover{transform:translateY(-5px);border-color:rgba(237,28,36,.5)}
.prob-ic{width:50px;height:50px;border-radius:12px;display:grid;place-items:center;
  background:rgba(237,28,36,.12);color:var(--red-2);margin-bottom:16px}
.prob-ic svg{width:26px;height:26px}
.prob-card h3{font-family:"Saira Condensed";font-weight:800;font-size:21px;margin-bottom:8px}
.prob-card p{color:var(--muted);font-size:15px}

/* ===== Solution ===== */
.solution-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
.solution-visual .comp{background:linear-gradient(180deg,var(--card),#0a0d16);border:1px solid var(--line);
  border-radius:22px;padding:30px}
.comp-row{margin-bottom:6px}
.comp-label{font-family:"Saira Condensed";font-weight:700;font-size:13px;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.comp-bar{height:16px;border-radius:10px;background:#161a28;overflow:hidden;margin:8px 0 4px}
.comp-bar i{display:block;height:100%;border-radius:10px;background:linear-gradient(90deg,#6b7280,#3a3f4d)}
.comp-bar--good i{background:linear-gradient(90deg,var(--blue),var(--blue-2))}
.comp-val{font-size:13px;color:var(--muted)}
.comp-row--good .comp-val{color:var(--blue-3)}
.comp-plus{font-family:"Saira Condensed";font-style:italic;font-weight:900;color:var(--red-2);
  text-align:center;margin:18px 0;font-size:20px;letter-spacing:.5px}
.check-list{list-style:none;margin:22px 0 28px;display:grid;gap:12px}
.check-list li{position:relative;padding-left:34px;color:#d4dcf0;font-size:16px}
.check-list li::before{content:"";position:absolute;left:0;top:2px;width:22px;height:22px;border-radius:6px;
  background:rgba(23,99,255,.15);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233b86ff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;background-size:14px}

/* ===== Benefits ===== */
.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ben-card{position:relative;background:linear-gradient(180deg,var(--card),#0a0d16);
  border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;overflow:hidden;
  transition:transform .2s,border-color .2s}
.ben-card:hover{transform:translateY(-6px);border-color:rgba(23,99,255,.5)}
.ben-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--blue),var(--red));transform:scaleX(0);transform-origin:left;transition:transform .3s}
.ben-card:hover::before{transform:scaleX(1)}
.ben-num{position:absolute;top:18px;right:22px;font-family:"Saira Condensed";font-style:italic;font-weight:900;
  font-size:46px;color:#161b2b;line-height:1}
.ben-ic{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;
  background:rgba(23,99,255,.12);color:var(--blue-2);margin-bottom:18px}
.ben-ic svg{width:30px;height:30px}
.ben-card h3{font-family:"Saira Condensed";font-weight:800;font-size:23px;margin-bottom:9px}
.ben-card p{color:var(--muted);font-size:15px}
.ben-card--cta{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
  background:linear-gradient(150deg,rgba(237,28,36,.16),rgba(23,99,255,.12));border-color:rgba(237,28,36,.35)}
.ben-card--cta h3{font-size:24px}
.ben-card--cta .btn{margin-top:16px}

/* ===== Usage ===== */
.steps{display:flex;align-items:stretch;justify-content:center;gap:0;flex-wrap:wrap}
.step{flex:1;min-width:220px;text-align:center;padding:18px;position:relative}
.step-no{display:inline-grid;place-items:center;width:62px;height:62px;border-radius:50%;
  font-family:"Saira Condensed";font-style:italic;font-weight:900;font-size:28px;margin-bottom:16px;
  background:linear-gradient(135deg,var(--blue),#0c3fc4);box-shadow:0 10px 26px rgba(23,99,255,.4)}
.step:nth-child(5) .step-no{background:linear-gradient(135deg,var(--red-2),#c10c13);box-shadow:0 10px 26px rgba(237,28,36,.4)}
.step h3{font-family:"Saira Condensed";font-weight:800;font-size:22px;margin-bottom:8px}
.step p{color:var(--muted);font-size:15px;max-width:260px;margin-inline:auto}
.step-line{flex:0 0 60px;align-self:flex-start;margin-top:48px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px)}

/* ===== Instagram ===== */
.ig-embed{position:relative;border:1px solid var(--line);border-radius:22px;overflow:hidden;
  background:linear-gradient(180deg,var(--card),#0a0d16);min-height:520px}
.ig-embed > behold-widget{display:block;width:100%;min-height:520px}
.ig-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;padding:30px}
.ig-ph-grid{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:6px;opacity:.25}
.ig-ph-grid span{background:linear-gradient(135deg,#141a2b,#0c1019);border-radius:8px;
  background-size:200% 100%;animation:shimmer 2.2s infinite}
.ig-ph-grid span:nth-child(2){animation-delay:.2s}
.ig-ph-grid span:nth-child(3){animation-delay:.4s}
.ig-ph-grid span:nth-child(4){animation-delay:.6s}
.ig-ph-grid span:nth-child(5){animation-delay:.8s}
.ig-ph-grid span:nth-child(6){animation-delay:1s}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
.ig-ph-msg{position:relative;z-index:2;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
  background:rgba(7,8,13,.7);backdrop-filter:blur(4px);padding:28px 32px;border-radius:18px;border:1px solid var(--line)}
.ig-ph-msg .ig-ic{width:38px;height:38px;color:var(--red-2)}
.ig-ph-msg p{color:var(--muted)}

/* ===== Etanol Hesaplayıcı ===== */
.calc-card{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:24px;overflow:hidden;
  background:linear-gradient(180deg,var(--card),#0a0d16)}
.calc-inputs{padding:34px;border-right:1px solid var(--line)}
.calc-field{margin-bottom:24px}
.calc-field:last-child{margin-bottom:0}
.calc-field label{display:block;font-family:"Saira Condensed";font-weight:700;font-size:15px;letter-spacing:.4px;
  text-transform:uppercase;color:#cdd6ec;margin-bottom:10px}
.calc-inp{display:flex;align-items:stretch;gap:10px}
.calc-inp input[type=number]{flex:1;min-width:0;background:#0a0d16;border:1.5px solid var(--line);border-radius:12px;
  color:#fff;font-family:"Saira Condensed";font-weight:800;font-size:24px;padding:12px 16px;outline:none;transition:border-color .2s}
.calc-inp input[type=number]:focus{border-color:var(--blue-2)}
.calc-inp input::-webkit-outer-spin-button,.calc-inp input::-webkit-inner-spin-button{opacity:.5}
.calc-unit{display:inline-flex;align-items:center;padding:0 16px;border-radius:12px;background:#141a2b;border:1.5px solid var(--line);
  font-family:"Saira Condensed";font-weight:700;color:var(--muted);white-space:nowrap}
.calc-unit-toggle{display:flex;background:#0a0d16;border:1.5px solid var(--line);border-radius:12px;overflow:hidden}
.calc-unit-toggle button{background:none;border:0;color:var(--muted);font-family:"Saira Condensed";font-weight:800;
  font-size:15px;padding:0 16px;cursor:pointer;transition:.2s}
.calc-unit-toggle button.active{background:var(--blue);color:#fff}
.calc-range{margin-top:12px}
.calc-range input[type=range]{width:100%;-webkit-appearance:none;appearance:none;height:6px;border-radius:6px;
  background:linear-gradient(90deg,var(--blue),#0c3fc4) no-repeat;background-size:var(--fill,50%) 100%;
  background-color:#161a28;cursor:pointer;outline:none}
.calc-range input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;
  background:#fff;border:3px solid var(--blue-2);box-shadow:0 2px 8px rgba(0,0,0,.5);cursor:pointer}
.calc-range input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--blue-2);cursor:pointer}
.calc-adv{margin-top:22px;border-top:1px solid var(--line);padding-top:16px}
.calc-adv summary{cursor:pointer;font-family:"Saira Condensed";font-weight:700;font-size:14px;letter-spacing:.5px;
  text-transform:uppercase;color:var(--blue-3);list-style:none;display:flex;align-items:center;gap:8px;user-select:none}
.calc-adv summary::-webkit-details-marker{display:none}
.calc-adv summary::before{content:"+";font-size:18px;line-height:1}
.calc-adv[open] summary::before{content:"–"}
.calc-adv-body{padding-top:18px;display:grid;gap:18px}

.calc-result{padding:34px;display:flex;flex-direction:column;position:relative;
  background:radial-gradient(500px 300px at 70% 0%, rgba(23,99,255,.12), transparent 60%)}
.calc-result.warn{background:radial-gradient(500px 300px at 70% 0%, rgba(255,176,32,.14), transparent 60%)}
.calc-result.danger{background:radial-gradient(500px 300px at 70% 0%, rgba(237,28,36,.16), transparent 60%)}
.calc-gauge{text-align:center;margin-bottom:22px}
.calc-e{display:block;font-family:"Saira Condensed";font-style:italic;font-weight:900;font-size:clamp(56px,9vw,84px);
  line-height:.9;color:var(--blue-2);text-shadow:0 0 30px rgba(23,99,255,.4);transition:color .25s}
.calc-result.warn .calc-e{color:#ffc23c;text-shadow:0 0 30px rgba(255,176,32,.4)}
.calc-result.danger .calc-e{color:var(--red-2);text-shadow:0 0 30px rgba(237,28,36,.4)}
.calc-pct{display:block;font-family:"Saira Condensed";font-weight:800;font-size:26px;margin-top:2px}
.calc-elabel{display:block;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-top:2px}
.calc-bar{height:12px;border-radius:8px;background:#161a28;overflow:hidden;margin:18px 0 8px}
.calc-bar i{display:block;height:100%;border-radius:8px;background:linear-gradient(90deg,var(--blue),var(--blue-2));transition:width .35s ease, background .25s}
.calc-result.warn .calc-bar i{background:linear-gradient(90deg,#f0a800,#ffc23c)}
.calc-result.danger .calc-bar i{background:linear-gradient(90deg,#c10c13,var(--red-2))}
.calc-scale{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);font-family:"Saira Condensed";font-weight:600}
.calc-breakdown{list-style:none;display:grid;gap:10px;margin:6px 0 18px}
.calc-breakdown li{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;
  background:#0c1019;border:1px solid var(--line);border-radius:12px}
.calc-breakdown span{color:var(--muted);font-size:15px}
.calc-breakdown b{font-family:"Saira Condensed";font-weight:800;font-size:20px}
.calc-note{font-size:15px;line-height:1.5;padding:14px 16px;border-radius:12px;margin-bottom:18px;
  border:1px solid rgba(23,99,255,.35);background:rgba(23,99,255,.1);color:#dbe4fb}
.calc-result.warn .calc-note{border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.1);color:#ffe6b0}
.calc-result.danger .calc-note{border-color:rgba(237,28,36,.4);background:rgba(237,28,36,.1);color:#ffcfd1}
.calc-cta{margin-top:auto;justify-content:center}
.calc-disclaimer{margin-top:18px;color:var(--muted);font-size:13.5px;line-height:1.6;max-width:900px}
.calc-disclaimer b{color:#c6d2ee}

/* ===== Final CTA ===== */
.finalcta{text-align:center;overflow:hidden}
.finalcta-inner{position:relative;border:1px solid var(--line);border-radius:28px;
  padding:64px 28px;background:linear-gradient(180deg,#0d1322,#070a12);overflow:hidden}
.finalcta-inner .glow--blue{left:10%;top:-40px}
.finalcta-inner .glow--red{right:8%;bottom:-30px}
.finalcta-title{position:relative;z-index:2;font-family:"Saira Condensed";font-style:italic;font-weight:900;
  font-size:clamp(28px,4.6vw,52px);line-height:1;letter-spacing:-.5px;transform:skewX(-3deg);margin-bottom:14px}
.finalcta p{position:relative;z-index:2;color:var(--muted);font-size:18px;margin-bottom:28px}
.finalcta .btn{position:relative;z-index:2}

/* ===== Footer ===== */
.footer{border-top:1px solid var(--line);background:#06070c;padding-top:54px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:30px;padding-bottom:40px}
.footer-brand p{color:var(--muted);font-size:15px;margin-top:14px;max-width:340px}
.footer-col h4{font-family:"Saira Condensed";font-weight:800;font-size:16px;letter-spacing:1px;text-transform:uppercase;margin-bottom:14px;color:#fff}
.footer-col a{display:block;color:var(--muted);font-size:15px;margin-bottom:9px;transition:color .2s}
.footer-col a:hover{color:var(--blue-2)}
.footer-loc{color:var(--muted);font-size:15px}
.footer-bar{border-top:1px solid var(--line);padding:18px 0}
.footer-bar-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:14px}
.footer-domain{color:var(--blue-3);font-weight:600}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease, transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (max-width:980px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-burger{display:flex}
  .nav-links.mobile-open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;
    background:rgba(7,8,13,.97);border-bottom:1px solid var(--line);padding:18px 24px;gap:16px;margin:0}
  .hero-inner{grid-template-columns:1fr;gap:30px;min-height:auto;text-align:center}
  .hero-sub{margin-inline:auto}
  .hero-cta,.hero-stats{justify-content:center}
  .eyebrow{margin-inline:auto}
  .hero-copy{order:1}
  .hero-visual{order:2;min-height:300px}
  .fuel-wrap{width:min(330px,82%)}
  .product-can{width:min(260px,70%)}
  .product-img{max-height:340px;max-width:78%}
  .problem-grid{grid-template-columns:repeat(2,1fr)}
  .solution-inner{grid-template-columns:1fr;gap:32px}
  .benefit-grid{grid-template-columns:repeat(2,1fr)}
  .step-line{display:none}
  .footer-inner{grid-template-columns:1fr 1fr}
  .calc-card{grid-template-columns:1fr}
  .calc-inputs{border-right:0;border-bottom:1px solid var(--line)}
}
@media (max-width:560px){
  .section{padding:64px 0}
  .problem-grid{grid-template-columns:1fr}
  .benefit-grid{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .footer-inner{grid-template-columns:1fr}
  .footer-brand{text-align:left}
  /* Hesaplayıcı — mobil ölçü düzeltmeleri */
  .calc-inputs,.calc-result{padding:22px}
  .calc-inp input[type=number]{font-size:20px;padding:11px 12px}
  .calc-unit{padding:0 12px;font-size:14px}
  .calc-unit-toggle button{padding:0 12px}
  .calc-e{font-size:clamp(48px,16vw,64px)}
  .calc-pct{font-size:22px}
  .calc-breakdown li{padding:11px 13px}
  .calc-breakdown b{font-size:18px}
  .calc-note{font-size:14px}
  .calc-field label{font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}