/* ============================================================
   YILDIRIM BİLİŞİM · GÜNEŞ ENERJİSİ & BİLİŞİM
   Theme-tokenised design system — LIGHT (default) + DARK.
   Lightning × Sun.  gold (capture) → cyan/blue (power).
   ============================================================ */

:root {
  /* Brand glows (constant across themes) */
  --gold:      #FDB813;
  --gold-2:    #FF8A3D;
  --cyan:      #22D3EE;
  --blue:      #3B82F6;

  /* Gradients */
  --grad-sun:   linear-gradient(120deg, #FDB813 0%, #FF8A3D 100%);
  --grad-volt:  linear-gradient(120deg, #22D3EE 0%, #3B82F6 100%);
  --grad-fuse:  linear-gradient(110deg, #F59E0B 0%, #FF8A3D 38%, #22B8D9 100%);

  /* Type */
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --body:    "Inter", system-ui, -apple-system, sans-serif;

  /* Rhythm */
  --maxw: 1240px;
  --pad: clamp(20px, 5vw, 80px);
  --r:   18px;
}

/* ---------- LIGHT THEME (default) ---------- */
:root, [data-theme="light"] {
  --bg:        #EEF2F8;
  --bg-2:      #E6ECF4;
  --bg-3:      #DFE6F0;
  --atmo:      radial-gradient(70% 50% at 80% -5%, rgba(253,184,19,0.14), transparent 60%),
               radial-gradient(60% 50% at 0% 8%, rgba(34,211,238,0.10), transparent 60%);

  --text:      #0E1626;
  --text-dim:  #3C4858;
  --gray:      #5A6675;
  --gray-2:    #8A95A4;

  --line:      rgba(14,22,38,0.10);
  --line-2:    rgba(14,22,38,0.14);

  --ink-gold:  #C77A04;   /* accent text on light */
  --ink-cyan:  #0E8FB0;

  --hero-text: #0E1626;
  --hero-sub:  #3C4858;

  --glass-bg:  linear-gradient(160deg, rgba(255,255,255,0.82), rgba(255,255,255,0.52));
  --glass-brd: rgba(255,255,255,0.85);
  --glass-out: rgba(14,22,38,0.07);
  --glass-hi:  rgba(255,255,255,0.9);
  --glass-shadow: 0 24px 50px -28px rgba(23,42,82,0.30);
  --glass-spec: radial-gradient(120% 80% at 0% 0%, rgba(255,255,255,0.7), transparent 50%);

  --nav-bg:    rgba(238,242,248,0.78);
  --nav-brd:   rgba(14,22,38,0.08);

  --card-bg:   rgba(255,255,255,0.62);
  --field-bg:  rgba(255,255,255,0.72);
  --field-bg-2:rgba(255,255,255,0.95);
  --seg-bg:    rgba(14,22,38,0.04);
  --stripe-a:  rgba(14,22,38,0.05);
  --stripe-b:  rgba(14,22,38,0.012);
  --phlabel-bg:rgba(255,255,255,0.6);
  --phlabel-tx:rgba(14,22,38,0.5);

  --btn-ghost-bg: rgba(255,255,255,0.6);
  --btn-ghost-tx: #0E1626;

  --shadow-soft: 0 1px 0 rgba(255,255,255,0.6) inset;
}

/* ---------- DARK THEME ---------- */
[data-theme="dark"] {
  --bg:        #070B14;
  --bg-2:      #0B1020;
  --bg-3:      #0E1626;
  --atmo:      radial-gradient(70% 50% at 80% -5%, rgba(253,184,19,0.10), transparent 60%),
               radial-gradient(60% 50% at 0% 8%, rgba(34,211,238,0.08), transparent 60%);

  --text:      #F5F7FA;
  --text-dim:  #C5CCD8;
  --gray:      #9CA3AF;
  --gray-2:    #6B7280;

  --line:      rgba(255,255,255,0.07);
  --line-2:    rgba(255,255,255,0.12);

  --ink-gold:  #FDB813;
  --ink-cyan:  #22D3EE;

  --hero-text: #F5F7FA;
  --hero-sub:  #C5CCD8;

  --glass-bg:  linear-gradient(160deg, rgba(255,255,255,0.06), rgba(255,255,255,0.015));
  --glass-brd: rgba(255,255,255,0.12);
  --glass-out: rgba(255,255,255,0.04);
  --glass-hi:  rgba(255,255,255,0.08);
  --glass-shadow: 0 30px 60px -30px rgba(0,0,0,0.7);
  --glass-spec: radial-gradient(120% 80% at 0% 0%, rgba(255,255,255,0.07), transparent 50%);

  --nav-bg:    rgba(7,11,20,0.72);
  --nav-brd:   rgba(255,255,255,0.07);

  --card-bg:   rgba(11,16,32,0.6);
  --field-bg:  rgba(255,255,255,0.03);
  --field-bg-2:rgba(34,211,238,0.04);
  --seg-bg:    rgba(255,255,255,0.02);
  --stripe-a:  rgba(255,255,255,0.04);
  --stripe-b:  rgba(255,255,255,0.012);
  --phlabel-bg:rgba(7,11,20,0.4);
  --phlabel-tx:rgba(245,247,250,0.45);

  --btn-ghost-bg: rgba(255,255,255,0.03);
  --btn-ghost-tx: #F5F7FA;

  --shadow-soft: 0 1px 0 rgba(255,255,255,0.08) inset;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .5s ease, color .5s ease;
}
/* fixed atmosphere layer */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -10;
  background: var(--atmo);
  pointer-events: none; transition: background .5s ease;
}

.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

::selection { background: var(--cyan); color: #04121A; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }

/* ---------- Layout helpers ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }

.eyebrow {
  font-family: var(--display);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--ink-gold);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--ink-gold); opacity: 0.85; }
.eyebrow.volt { color: var(--ink-cyan); }
.eyebrow.volt::before { background: var(--ink-cyan); }

h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.02; letter-spacing: -0.02em; }

.section-title {
  font-size: clamp(2rem, 5.2vw, 4rem);
  text-transform: uppercase; letter-spacing: -0.01em;
  line-height: 0.98; text-wrap: balance; color: var(--text);
}
.lead { font-size: clamp(1rem, 1.6vw, 1.2rem); color: var(--text-dim); max-width: 56ch; text-wrap: pretty; }

/* ---------- Glass ---------- */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-brd);
  border-radius: var(--r);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow-soft), 0 0 0 1px var(--glass-out), var(--glass-shadow);
  position: relative;
}
.glass::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: var(--glass-spec); pointer-events: none;
}

/* ---------- Buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--display); font-weight: 600; font-size: 15px; letter-spacing: 0.01em;
  padding: 16px 28px; border-radius: 100px; border: 1px solid transparent;
  color: #1A1206; background: var(--grad-sun);
  transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, filter .35s;
  box-shadow: 0 14px 40px -12px rgba(253,184,19,0.55);
  will-change: transform; white-space: nowrap;
}
.btn:hover { box-shadow: 0 0 36px -4px rgba(253,184,19,0.5), 0 14px 40px -12px rgba(253,184,19,0.65); filter: brightness(1.04); }
.btn:active { transform: scale(.97); }
.btn .arr { transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.btn:hover .arr { transform: translateX(4px); }

.btn.ghost {
  color: var(--btn-ghost-tx); background: var(--btn-ghost-bg);
  border: 1px solid var(--line-2); box-shadow: none;
  backdrop-filter: blur(10px);
}
.btn.ghost:hover { border-color: var(--cyan); box-shadow: 0 0 28px -6px rgba(34,211,238,0.4); filter: none; }

.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px;
}

/* ============================================================ NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--pad);
  transition: background .4s, backdrop-filter .4s, border-color .4s, padding .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--nav-brd);
  padding-block: 12px;
}
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--display); font-weight: 700; letter-spacing: 0.01em; font-size: 18px; color: var(--text); line-height: 1.05; }
.brand .mark { width: 30px; height: 30px; display: grid; place-items: center; flex: 0 0 auto; }
.brand .mark svg { width: 100%; height: 100%; filter: drop-shadow(0 0 8px rgba(253,184,19,0.45)); }
.brand .sub { color: var(--gray); font-weight: 500; font-family: var(--body); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 14.5px; color: var(--text-dim); position: relative; transition: color .3s; font-weight: 500; }
.nav-links a::after { content:""; position:absolute; left:0; bottom:-6px; height:2px; width:0; background: var(--grad-volt); transition: width .35s cubic-bezier(.2,.8,.2,1); }
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav .btn { padding: 12px 22px; font-size: 14px; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle { width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--seg-bg); color: var(--text); display: grid; place-items: center; transition: border-color .3s, box-shadow .3s, color .3s, transform .3s; }
.theme-toggle:hover { border-color: var(--cyan); box-shadow: 0 0 22px -8px var(--cyan); }
.theme-toggle:active { transform: scale(.92); }
.theme-toggle svg { display: none; }
[data-theme="light"] .theme-toggle .ic-moon { display: block; }
[data-theme="dark"] .theme-toggle .ic-sun { display: block; color: var(--gold); }
.nav-toggle { display:none; background:none; border:0; color: var(--text); width:42px; height:42px; }
@media (max-width: 1040px) { .nav-links, .nav .btn.nav-cta { display: none; } .nav-toggle { display: grid; place-items:center; } }

/* ============================================================ HERO */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; isolation: isolate; padding: 110px 0 70px; }
#hero-bg { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; display: block; }
.hero-veil {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 60% at 80% 30%, var(--veil-glow, rgba(253,184,19,0.10)), transparent 60%),
    linear-gradient(180deg, transparent 60%, var(--veil-bot, rgba(238,242,248,0.35)) 100%);
  transition: background .5s ease;
}
[data-theme="dark"] .hero-veil { --veil-glow: rgba(253,184,19,0.12); --veil-bot: rgba(7,11,20,0.45); }

.hero-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: clamp(28px, 4vw, 60px); align-items: center; width: 100%; }
@media (max-width: 980px){ .hero-grid { grid-template-columns: 1fr; gap: 40px; } }
.hero .eyebrow { opacity: 0; transform: translateY(14px); }

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.0;
  text-transform: uppercase; letter-spacing: -0.035em; font-weight: 700;
  margin: 18px 0 22px; max-width: none; color: var(--hero-text);
}
.knockout {
  background: var(--grad-fuse); background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
  animation: sheen 9s ease-in-out infinite;
  filter: drop-shadow(0 4px 22px rgba(34,211,238,0.18));
}
@keyframes sheen { 0%,100%{ background-position: 0% 50%; } 50%{ background-position: 100% 50%; } }
.hero .line { display: block; overflow: hidden; padding: 0.06em 0.14em 0.06em 0; margin: -0.06em 0; }
.hero .line > span { display: block; transform: translateY(105%); }
.hero-sub { max-width: 46ch; font-size: clamp(1rem, 1.4vw, 1.18rem); color: var(--hero-sub); opacity: 0; transform: translateY(14px); }
.hero-cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; opacity: 0; transform: translateY(14px); }
.hero-trust { display: flex; gap: 26px; margin-top: 36px; flex-wrap: wrap; opacity: 0; transform: translateY(14px); }
.hero-trust .ht { display: flex; flex-direction: column; gap: 2px; }
.hero-left { min-width: 0; }
.hero-trust .ht b { font-family: var(--display); font-weight: 700; font-size: 1.35rem; color: var(--text); letter-spacing: -0.01em; white-space: nowrap; }
.hero-trust .ht span { font-size: 12px; color: var(--gray); }
.hero-trust .ht b .u { color: var(--ink-gold); font-size: 0.62em; }

/* ---- Energy Console (interactive HUD) ---- */
.hero-right { opacity: 0; transform: translateY(20px); }
.console { padding: 22px 22px 20px; border-radius: 20px; position: relative; overflow: hidden; }
.console::before { content:""; position:absolute; inset:0; border-radius:inherit; padding:1px; background: linear-gradient(150deg, color-mix(in oklab, var(--cyan) 40%, transparent), transparent 40%, transparent 70%, color-mix(in oklab, var(--gold) 35%, transparent)); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events:none; opacity:.8; }
.console-hd { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.console-hd .ch-t { display: flex; align-items: center; gap: 10px; font-family: var(--display); font-size: 13px; font-weight: 600; letter-spacing: 0.02em; color: var(--text); }
.live { display: inline-flex; align-items: center; gap: 6px; font-size: 10.5px; font-weight: 600; letter-spacing: 0.12em; color: var(--ink-cyan); padding: 4px 9px; border-radius: 100px; border: 1px solid color-mix(in oklab, var(--cyan) 28%, transparent); background: color-mix(in oklab, var(--cyan) 8%, transparent); }
.live i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 0 var(--cyan); animation: livep 1.8s ease-out infinite; }
@keyframes livep { 0%{ box-shadow: 0 0 0 0 color-mix(in oklab, var(--cyan) 70%, transparent);} 70%{ box-shadow: 0 0 0 7px transparent;} 100%{ box-shadow: 0 0 0 0 transparent;} }
.city-sel { position: relative; }
.city-sel select { appearance: none; font-family: var(--body); font-size: 13px; color: var(--text); background: var(--seg-bg); border: 1px solid var(--line-2); border-radius: 9px; padding: 8px 30px 8px 12px; cursor: pointer; transition: border-color .3s; }
.city-sel select:hover { border-color: var(--cyan); }
.city-sel::after { content:"▾"; position:absolute; right:11px; top:50%; transform:translateY(-50%); color: var(--gray); pointer-events:none; font-size: 11px; }

.chart-wrap { position: relative; height: 188px; margin: 0 -4px 6px; }
#prodChart { width: 100%; height: 100%; display: block; }
.chart-tip { position: absolute; pointer-events: none; transform: translate(-50%, -120%); background: var(--field-bg-2); border: 1px solid var(--line-2); border-radius: 8px; padding: 6px 10px; font-size: 11.5px; color: var(--text); white-space: nowrap; opacity: 0; transition: opacity .15s; box-shadow: var(--glass-shadow); z-index: 4; }
.chart-tip b { font-family: var(--display); color: var(--ink-cyan); }
.chart-axis { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--gray-2); padding: 0 2px; margin-bottom: 14px; font-family: var(--display); letter-spacing: 0.04em; }

.console-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.ctile { background: var(--card-bg); padding: 13px 12px; }
.ctile .k { font-size: 10.5px; color: var(--gray); letter-spacing: 0.02em; }
.ctile .v { font-family: var(--display); font-weight: 700; font-size: 1.32rem; color: var(--text); margin-top: 5px; letter-spacing: -0.02em; line-height: 1; }
.ctile .v span { font-size: 0.55em; color: var(--gray); margin-left: 2px; font-weight: 500; }
.ctile.accent .v { color: var(--ink-gold); }

.console-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 16px; }
.goal { flex: 1; }
.goal .gtrack { height: 6px; border-radius: 6px; background: var(--line-2); overflow: hidden; }
.goal .gfill { height: 100%; width: 0; border-radius: 6px; background: var(--grad-fuse); transition: width .4s ease; }
.goal .glab { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--gray); margin-top: 7px; }
.console .ccta { flex: 0 0 auto; font-family: var(--display); font-size: 12.5px; font-weight: 600; color: var(--ink-cyan); display: inline-flex; align-items: center; gap: 6px; padding: 9px 14px; border-radius: 100px; border: 1px solid var(--line-2); transition: all .3s; }
.console .ccta:hover { border-color: var(--cyan); box-shadow: 0 0 20px -8px var(--cyan); color: var(--text); }
.console .ccta .arr { transition: transform .3s; }
.console .ccta:hover .arr { transform: translateX(3px); }

.hero-scroll { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 10px; font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--gray); z-index: 2; }
@media (max-width: 980px){ .hero-scroll { display: none; } }
.hero-scroll .rail { width: 2px; height: 40px; background: linear-gradient(var(--cyan), transparent); position: relative; overflow: hidden; border-radius: 2px; }
.hero-scroll .rail::after { content:""; position:absolute; top:-40%; left:0; width:2px; height:40%; background: #fff; animation: railrun 2.2s ease-in-out infinite; }
@keyframes railrun { 0%{ transform: translateY(-20%);} 100%{ transform: translateY(260%);} }

/* ============================================================ DIVIDERS */
.cut-top-diag { clip-path: polygon(0 3.5vw, 100% 0, 100% 100%, 0 100%); margin-top: -2.5vw; padding-top: calc(clamp(70px,11vw,160px) + 2.5vw) !important; }

/* ============================================================ TRUST STRIP */
.trust { padding: clamp(40px, 7vw, 92px) 0; position: relative; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.stat { padding: clamp(22px, 3vw, 40px) clamp(18px,2.4vw,30px); background: var(--card-bg); position: relative; backdrop-filter: blur(10px); }
.stat .num { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 4.4vw, 3.4rem); line-height: 1; letter-spacing: -0.02em; color: var(--text); }
.stat .num .u { font-size: 0.5em; color: var(--ink-gold); margin-left: 4px; }
.stat.volt .num .u { color: var(--ink-cyan); }
.stat .lab { margin-top: 12px; font-size: 14px; color: var(--gray); }
.stat::before { content:""; position:absolute; left:0; top:0; width:0; height:3px; background: var(--grad-sun); transition: width 1.1s cubic-bezier(.2,.8,.2,1); }
.stat.volt::before { background: var(--grad-volt); }
.stat.in::before { width: 100%; }
@media (max-width: 760px){ .trust-grid { grid-template-columns: repeat(2,1fr);} }

/* ============================================================ SECTION shell */
.section { position: relative; padding: clamp(70px, 11vw, 160px) 0; }
.section-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 68px); }
.section-head .lead { margin-top: 22px; }
.section-head h2 { margin-top: 18px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .06s; }
.reveal.d2 { transition-delay: .12s; }
.reveal.d3 { transition-delay: .18s; }
.reveal.d4 { transition-delay: .24s; }
.reveal.d5 { transition-delay: .30s; }
.reveal.d6 { transition-delay: .36s; }

/* ============================================================ FLAGSHIP (solar) */
.solutions { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.flag { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 26px; margin-bottom: 26px; align-items: stretch; }
@media (max-width: 940px){ .flag { grid-template-columns: 1fr; } }
.flag-copy { padding: clamp(28px,3.4vw,46px); display: flex; flex-direction: column; }
.flag-copy .badge-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.pill { font-family: var(--display); font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; padding: 7px 14px; border-radius: 100px; border: 1px solid var(--line-2); color: var(--text-dim); background: var(--seg-bg); }
.pill.gold { color: var(--ink-gold); border-color: color-mix(in oklab, var(--gold) 35%, transparent); }
.flag-copy h3 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); text-transform: uppercase; letter-spacing: -0.02em; line-height: 0.98; }
.flag-copy p { color: var(--text-dim); margin-top: 18px; font-size: 1.05rem; max-width: 46ch; }
.flag-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; margin: 26px 0 28px; }
.flag-feats li { list-style: none; display: flex; align-items: flex-start; gap: 10px; font-size: 14.5px; color: var(--text-dim); }
.flag-feats .dot { width: 18px; height: 18px; flex: 0 0 auto; margin-top: 1px; border-radius: 50%; display: grid; place-items: center; background: var(--grad-volt); color: #04121A; font-size: 11px; font-weight: 700; }
.flag-copy .flag-cta { margin-top: auto; display: flex; gap: 14px; flex-wrap: wrap; }
.flag-visual { border-radius: var(--r); position: relative; overflow: hidden; min-height: 420px; border: 1px solid var(--glass-brd); }
.flag-visual .ph { position: absolute; inset: 0; }
.flag-visual .badge-float { position: absolute; right: 18px; bottom: 18px; z-index: 3; padding: 16px 18px; border-radius: 14px; }
.flag-visual .badge-float .v { font-family: var(--display); font-weight: 700; font-size: 1.6rem; color: var(--text); line-height: 1; }
.flag-visual .badge-float .k { font-size: 12px; color: var(--gray); margin-top: 4px; }

.sol-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
@media (max-width: 1040px){ .sol-grid { grid-template-columns: repeat(2,1fr);} }
@media (max-width: 560px){ .sol-grid { grid-template-columns: 1fr;} }
.sol-card { padding: 28px 24px 30px; border-radius: var(--r); position: relative; overflow: hidden; min-height: 300px; display: flex; flex-direction: column; transition: transform .5s cubic-bezier(.2,.8,.2,1), border-color .5s, box-shadow .5s; }
.sol-card:hover { transform: translateY(-8px); border-color: color-mix(in oklab, var(--cyan) 45%, transparent); box-shadow: var(--shadow-soft), 0 30px 60px -28px rgba(34,150,200,0.4); }
.sol-card .cut-img { height: 110px; margin: -2px -2px 22px; border-radius: 14px; position: relative; overflow: hidden; display: grid; place-items: center; }
.sol-ico { width: 54px; height: 54px; position: relative; z-index: 2; filter: drop-shadow(0 0 12px rgba(253,184,19,0.45)); transition: transform .5s; }
.sol-card:hover .sol-ico { transform: translateY(-4px) scale(1.06); }
.sol-card h3 { font-size: 1.32rem; text-transform: none; letter-spacing: -0.01em; color: var(--text); }
.sol-card p { color: var(--gray); font-size: 14.5px; margin-top: 10px; }
.sol-card .tag { margin-top: auto; padding-top: 18px; font-family: var(--display); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-cyan); display: flex; align-items: center; gap: 8px; }
.glow-bed { position:absolute; inset:0; background: radial-gradient(60% 70% at 50% 0%, color-mix(in oklab, var(--gold) 22%, transparent), transparent 70%); }
.sol-card.volt .glow-bed { background: radial-gradient(60% 70% at 50% 0%, color-mix(in oklab, var(--cyan) 22%, transparent), transparent 70%); }
.sol-card.volt .sol-ico { filter: drop-shadow(0 0 12px rgba(34,211,238,0.5)); }

/* ============================================================ HİZMETLER CHAPTER (dedicated feature sections) */
.svc-intro { background: var(--bg-2); position: relative; overflow: hidden; }
.svc-intro .marquee { margin-top: 30px; display: flex; gap: 10px; flex-wrap: wrap; }
.svc-chip { font-family: var(--display); font-size: 12.5px; font-weight: 500; letter-spacing: 0.02em; padding: 9px 15px; border-radius: 100px; border: 1px solid var(--line-2); color: var(--text-dim); background: var(--seg-bg); transition: all .3s; cursor: default; }
.svc-chip:hover { border-color: color-mix(in oklab, var(--cyan) 45%, transparent); color: var(--text); transform: translateY(-2px); }
.svc-chip.on { color: var(--ink-gold); border-color: color-mix(in oklab, var(--gold) 40%, transparent); }

.feature { position: relative; padding: clamp(54px, 8vw, 104px) 0; }
.feature:nth-of-type(even) { background: var(--bg-2); }
.feature:nth-of-type(odd) { background: var(--bg); }
.feat-grid { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: clamp(28px, 5vw, 66px); align-items: center; }
@media (max-width: 940px){ .feat-grid { grid-template-columns: 1fr; gap: 32px; } }
.feature.flip .feat-visual { order: -1; }
@media (max-width: 940px){ .feature.flip .feat-visual { order: 0; } }

.feat-no { font-family: var(--display); font-size: 12.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fa, var(--ink-cyan)); display: inline-flex; align-items: center; gap: 10px; }
.feat-no::before { content: ""; width: 22px; height: 2px; background: var(--fa, var(--ink-cyan)); }
.feat-copy h3 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); text-transform: uppercase; letter-spacing: -0.02em; line-height: 1.0; margin: 18px 0 16px; color: var(--text); }
.feat-copy > p { color: var(--text-dim); font-size: 1.04rem; max-width: 46ch; }
.feat-list { margin: 22px 0 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
@media (max-width: 460px){ .feat-list { grid-template-columns: 1fr; } }
.feat-list li { list-style: none; display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text-dim); }
.feat-list .dot { width: 18px; height: 18px; flex: 0 0 auto; margin-top: 1px; border-radius: 50%; display: grid; place-items: center; background: var(--fa, var(--cyan)); color: #04121A; font-size: 10px; font-weight: 700; }
.feat-link { font-family: var(--display); font-size: 13.5px; font-weight: 600; color: var(--fa, var(--ink-cyan)); display: inline-flex; align-items: center; gap: 8px; transition: gap .3s; }
.feat-link:hover { gap: 12px; }
.feat-link .arr { transition: transform .3s; }

.feat-visual { border-radius: 20px; position: relative; overflow: hidden; aspect-ratio: 4 / 3.1; border: 1px solid var(--glass-brd); box-shadow: var(--glass-shadow); background: linear-gradient(160deg, color-mix(in oklab, var(--fa, var(--cyan)) 8%, var(--bg-3)), var(--bg-3)); }
@media (max-width: 940px){ .feat-visual { aspect-ratio: 16 / 10; } }
.feat-visual canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.feat-hud { position: absolute; left: 14px; top: 13px; z-index: 3; display: flex; align-items: center; gap: 8px; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 11px; letter-spacing: 0.05em; color: var(--text-dim); background: var(--phlabel-bg); border: 1px solid var(--line); padding: 4px 9px; border-radius: 7px; backdrop-filter: blur(6px); }
.feat-hud .rec { width: 8px; height: 8px; border-radius: 50%; background: var(--fa, var(--cyan)); box-shadow: 0 0 8px var(--fa, var(--cyan)); animation: livep 1.8s ease-out infinite; }
.feat-corner { position: absolute; right: 14px; bottom: 13px; z-index: 3; font-family: var(--display); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fa, var(--ink-cyan)); opacity: 0.9; }
.feat-tag { --fa: var(--ink-cyan); }
.feat-tag.gold { --fa: var(--ink-gold); }

/* ============================================================ PROCESS */
.process { background: var(--bg); }
.proc-wrap { position: relative; }
#proc-canvas { position:absolute; inset:0; width:100%; height:100%; z-index:0; pointer-events:none; }
.proc-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; position: relative; z-index: 1; }
@media (max-width: 920px){ .proc-grid { grid-template-columns: repeat(2,1fr);} }
@media (max-width: 520px){ .proc-grid { grid-template-columns: 1fr;} }
.step { padding: 28px 24px 30px; border-radius: var(--r); }
.step .idx { font-family: var(--display); font-weight: 700; font-size: 1rem; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); color: var(--ink-gold); background: var(--card-bg); transition: all .4s; }
.step.lit .idx { color: #04121A; background: var(--grad-volt); border-color: transparent; box-shadow: 0 0 26px -4px var(--cyan); }
.step h3 { font-size: 1.2rem; text-transform: none; margin: 20px 0 8px; color: var(--text); }
.step p { color: var(--gray); font-size: 14px; }

/* ============================================================ CALCULATOR */
.calc { background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 100%); }
.calc-shell { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 26px; }
@media (max-width: 960px){ .calc-shell { grid-template-columns: 1fr; } }
.calc-panel { padding: clamp(26px, 3vw, 40px); }
.calc-panel h3 { font-size: 1.5rem; text-transform: none; margin-bottom: 4px; color: var(--text); }
.calc-panel .hint { color: var(--gray); font-size: 13.5px; margin-bottom: 26px; }
.field { margin-bottom: 24px; }
.field label { display: flex; justify-content: space-between; align-items: baseline; font-size: 13.5px; color: var(--text-dim); margin-bottom: 12px; }
.field label .val { font-family: var(--display); font-weight: 600; color: var(--text); font-size: 15px; }
.field label .val b { color: var(--ink-gold); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 5px; border-radius: 5px; background: var(--line-2); outline: none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--grad-sun); cursor: pointer; box-shadow: 0 0 0 5px rgba(253,184,19,0.16), 0 2px 8px rgba(0,0,0,0.2); transition: transform .2s; }
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type=range]::-moz-range-thumb { width: 20px; height: 20px; border:0; border-radius: 50%; background: #FDB813; cursor: pointer; box-shadow: 0 0 0 5px rgba(253,184,19,0.16); }
.seg { display: flex; gap: 8px; }
.seg button { flex: 1; padding: 12px 8px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--seg-bg); color: var(--text-dim); font-size: 13.5px; font-family: var(--body); transition: all .3s; }
.seg button.on { color: #04121A; background: var(--grad-volt); border-color: transparent; font-weight: 600; box-shadow: 0 0 24px -6px rgba(34,211,238,0.5); }
.seg button:hover:not(.on) { border-color: var(--cyan); color: var(--text); }
.calc-out { padding: clamp(26px, 3vw, 40px); display: flex; flex-direction: column; }
.calc-out .badge { align-self: flex-start; font-family: var(--display); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-cyan); padding: 7px 14px; border: 1px solid color-mix(in oklab, var(--cyan) 30%, transparent); border-radius: 100px; margin-bottom: 26px; background: color-mix(in oklab, var(--cyan) 8%, transparent); }
.out-row { display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--line); border-radius: 14px; overflow: hidden; border: 1px solid var(--line); }
.out-cell { background: var(--card-bg); padding: 22px; backdrop-filter: blur(8px); }
.out-cell .k { font-size: 12.5px; color: var(--gray); }
.out-cell .v { font-family: var(--display); font-weight: 700; font-size: clamp(1.5rem, 2.6vw, 2.1rem); line-height: 1.1; margin-top: 8px; letter-spacing: -0.02em; color: var(--text); }
.out-cell .v .u { font-size: 0.5em; color: var(--gray); margin-left: 4px; font-weight: 500; }
.out-cell.hero-cell { grid-column: 1 / -1; background: linear-gradient(120deg, color-mix(in oklab, var(--gold) 12%, transparent), color-mix(in oklab, var(--cyan) 10%, transparent)); }
.out-cell.hero-cell .v { background: var(--grad-fuse); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.calc-note { font-size: 12px; color: var(--gray-2); margin-top: 22px; line-height: 1.5; }
.calc-out .btn { margin-top: 24px; align-self: flex-start; }

/* ============================================================ PROJECTS */
.projects { background: var(--bg); }
.proj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px){ .proj-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px){ .proj-grid { grid-template-columns: 1fr; } }
.proj-card { border-radius: var(--r); overflow: hidden; position: relative; aspect-ratio: 4/3.3; border: 1px solid var(--glass-brd); box-shadow: var(--glass-shadow); }
.proj-card .ph { position: absolute; inset: 0; }
.proj-card .meta { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px; background: linear-gradient(transparent, rgba(7,11,20,0.86) 72%); z-index: 2; }
.proj-card .meta .loc { font-family: var(--display); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: #5BE9FF; }
.proj-card .meta h4 { font-family: var(--display); font-weight: 600; font-size: 1.18rem; margin-top: 6px; color: #fff; }
.proj-card .meta .kw { color: var(--gold); font-size: 13px; margin-top: 6px; font-family: var(--display); }
.proj-card .ph .stripes { transition: transform .8s cubic-bezier(.2,.8,.2,1); }
.proj-card:hover .ph .stripes { transform: scale(1.06); }
.proj-feature { grid-column: span 2; aspect-ratio: auto; }
@media (max-width: 600px){ .proj-feature { grid-column: span 1; } }

/* ============================================================ BLOG */
.blog { background: var(--bg-2); }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px){ .blog-grid { grid-template-columns: 1fr; } }
.post { border-radius: var(--r); overflow: hidden; display: flex; flex-direction: column; transition: transform .5s cubic-bezier(.2,.8,.2,1), border-color .5s, box-shadow .5s; }
.post:hover { transform: translateY(-8px); border-color: color-mix(in oklab, var(--cyan) 40%, transparent); box-shadow: var(--shadow-soft), 0 30px 60px -28px rgba(34,150,200,0.4); }
.post .thumb { height: 180px; position: relative; overflow: hidden; }
.post .thumb .stripes { transition: transform .8s cubic-bezier(.2,.8,.2,1); }
.post:hover .thumb .stripes { transform: scale(1.06); }
.post .body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.post .cat { font-family: var(--display); font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-cyan); }
.post h4 { font-family: var(--display); font-weight: 600; font-size: 1.22rem; line-height: 1.2; margin: 12px 0 10px; color: var(--text); letter-spacing: -0.01em; }
.post p { color: var(--gray); font-size: 14px; }
.post .read { margin-top: auto; padding-top: 18px; display: flex; align-items: center; justify-content: space-between; }
.post .read .date { font-size: 12.5px; color: var(--gray-2); }
.post .read .go { font-family: var(--display); font-size: 13px; color: var(--ink-gold); display: inline-flex; align-items: center; gap: 6px; }
.post:hover .read .go .arr { transform: translateX(4px); }
.post .read .go .arr { transition: transform .35s; }

/* ============================================================ WHY */
.why { background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%); }
.why-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
@media (max-width: 960px){ .why-grid { grid-template-columns: repeat(2,1fr);} }
@media (max-width: 520px){ .why-grid { grid-template-columns: 1fr;} }
.why-card { padding: 30px 26px; border-radius: var(--r); min-height: 220px; display: flex; flex-direction: column; }
.why-card .wn { font-family: var(--display); color: var(--ink-cyan); font-size: 13px; letter-spacing: 0.2em; }
.why-card h3 { font-size: 1.28rem; text-transform: none; margin: auto 0 10px; color: var(--text); }
.why-card p { color: var(--gray); font-size: 14px; }

/* ============================================================ CONTACT */
.contact { background: var(--bg-3); position: relative; overflow: hidden; }
.contact::before { content:""; position: absolute; width: 600px; height: 600px; right: -160px; top: -160px; background: radial-gradient(circle, color-mix(in oklab, var(--gold) 14%, transparent), transparent 65%); pointer-events:none; }
.contact::after { content:""; position: absolute; width: 600px; height: 600px; left: -200px; bottom: -240px; background: radial-gradient(circle, color-mix(in oklab, var(--cyan) 14%, transparent), transparent 65%); pointer-events:none; }
.contact-shell { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 40px; position: relative; z-index: 1; align-items: start; }
@media (max-width: 900px){ .contact-shell { grid-template-columns: 1fr; } }
.contact-aside h2 { font-size: clamp(2rem, 4.6vw, 3.2rem); text-transform: uppercase; line-height: 0.98; color: var(--text); }
.contact-aside .lead { margin-top: 20px; }
.contact-meta { margin-top: 34px; display: flex; flex-direction: column; gap: 16px; }
.contact-meta a, .contact-meta div { display: flex; align-items: center; gap: 14px; color: var(--text-dim); font-size: 15px; }
.contact-meta .ic { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line-2); display: grid; place-items: center; color: var(--ink-gold); flex: 0 0 auto; background: var(--seg-bg); }
.form { padding: clamp(26px, 3vw, 40px); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 520px){ .form-row { grid-template-columns: 1fr; } }
.form .field { margin-bottom: 18px; }
.inp { width: 100%; padding: 15px 16px; border-radius: 12px; background: var(--field-bg); border: 1px solid var(--line-2); color: var(--text); font-family: var(--body); font-size: 15px; transition: border-color .3s, box-shadow .3s, background .3s; }
.inp::placeholder { color: var(--gray-2); }
.inp:focus { border-color: var(--cyan); background: var(--field-bg-2); box-shadow: 0 0 0 3px rgba(34,211,238,0.12); }
textarea.inp { resize: vertical; min-height: 110px; }
label.flbl { font-size: 13px; color: var(--text-dim); margin-bottom: 8px; display: block; }
.form .btn { width: 100%; justify-content: center; margin-top: 8px; }
.form-ok { display:none; padding: 14px 16px; border-radius: 12px; background: color-mix(in oklab, var(--cyan) 10%, transparent); border: 1px solid color-mix(in oklab, var(--cyan) 30%, transparent); color: var(--ink-cyan); font-size: 14px; margin-top: 14px; }
.form-ok.show { display: block; }

/* ============================================================ FOOTER */
.footer { background: var(--bg); border-top: 1px solid var(--line); padding: clamp(48px,7vw,84px) 0 36px; }
.foot-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 46px; border-bottom: 1px solid var(--line); }
@media (max-width: 820px){ .foot-top { grid-template-columns: 1fr 1fr; gap: 36px 20px; } }
.foot-brand .brand { font-size: 20px; margin-bottom: 16px; }
.foot-brand p { color: var(--gray); font-size: 14px; max-width: 36ch; }
.foot-col h5 { font-family: var(--display); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gray-2); margin-bottom: 16px; }
.foot-col a, .foot-col span { display: block; color: var(--text-dim); font-size: 14.5px; margin-bottom: 11px; transition: color .3s; }
.foot-col a:hover { color: var(--ink-cyan); }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 26px; flex-wrap: wrap; gap: 14px; }
.foot-bottom p { color: var(--gray-2); font-size: 13px; }
.socials { display: flex; gap: 12px; }
.socials a { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line-2); display: grid; place-items: center; color: var(--gray); transition: all .3s; background: var(--seg-bg); }
.socials a:hover { color: var(--text); border-color: var(--cyan); box-shadow: 0 0 20px -6px rgba(34,211,238,0.5); }

/* ---------- Striped placeholder ---------- */
.stripes { position:absolute; inset:0; background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 10px, var(--stripe-b) 10px 20px); }
.ph-label { position:absolute; left:14px; top:12px; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 11px; letter-spacing: 0.03em; color: var(--phlabel-tx); z-index:3; background: var(--phlabel-bg); padding: 3px 8px; border-radius: 6px; border: 1px solid var(--line); }
/* projects/blog placeholders always read on dark image overlays */
.proj-card .ph-label, .post .thumb .ph-label { color: rgba(245,247,250,0.7); background: rgba(7,11,20,0.45); border-color: rgba(255,255,255,0.12); }

/* ---------- Loader ---------- */
.loader { position: fixed; inset: 0; background: var(--bg); z-index: 9999; display: grid; place-items: center; transition: opacity .7s ease, visibility .7s; }
.loader.gone { opacity: 0; visibility: hidden; }
.loader .l-mark { width: 64px; height: 64px; filter: drop-shadow(0 0 16px rgba(253,184,19,0.5)); animation: pulse 1.6s ease-in-out infinite; }
.loader .l-txt { position:absolute; bottom: 16%; font-family: var(--display); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--gray); }
@keyframes pulse { 0%,100%{ transform: scale(.94); opacity:.8;} 50%{ transform: scale(1.04); opacity:1;} }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero .line > span { transform: none !important; }
}