/* Optik Karnem tanıtım sitesi.
   Tasarım dili: optik form. Çizgi rengi baskı mavisi, işaretler kurşun kalem grafiti, kenarlarda zamanlama izleri. */

@font-face { font-family: "Bricolage Grotesque"; src: url("fonts/BricolageGrotesque-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Bricolage Grotesque"; src: url("fonts/BricolageGrotesque-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/InstrumentSans-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/InstrumentSans-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }

:root {
  --paper: #f4f5f9;
  --white: #ffffff;
  --ink: #1b1e27;
  --ink-2: #4a5063;
  --line: #d9dce8;
  --blue: #2837c9;
  --blue-deep: #10186b;
  --blue-soft: #e4e7fb;
  --mark: #d6246e;
  --good: #1f7a4d;
  --warn: #b8641a;

  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --text: "Instrument Sans", "Segoe UI", system-ui, sans-serif;

  --gutter: clamp(20px, 5vw, 64px);
  --max: 1200px;
  --shadow-sheet: 0 1px 2px rgba(16, 24, 107, .08), 0 18px 40px -12px rgba(16, 24, 107, .28), 0 48px 90px -30px rgba(16, 24, 107, .30);
  --shadow-win: 0 1px 2px rgba(16, 24, 107, .08), 0 24px 50px -20px rgba(16, 24, 107, .30);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 1.0625rem/1.6 var(--text); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, textarea { font: inherit; color: inherit; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
.on-dark :focus-visible { outline-color: #fff; }

.wrap { width: 100%; max-width: calc(var(--max) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 6px; z-index: 100; }
.skip:focus { left: 8px; }

/* ---------- Zamanlama izi: optik formların kenarındaki siyah işaretler ---------- */
.marks { height: 6px; background: repeating-linear-gradient(90deg, var(--ink) 0 3px, transparent 3px 14px); opacity: .9; }
.marks--soft { opacity: .22; }

/* ---------- Düğmeler ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 22px; border-radius: 10px; border: 1.5px solid transparent;
  font: 700 .98rem/1 var(--text); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color .18s, border-color .18s, color .18s, transform .18s, box-shadow .18s;
}
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 8px 20px -8px rgba(40, 55, 201, .7); }
.btn--primary:hover { background: #1f2db0; transform: translateY(-1px); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: #fff; }
.btn--light { background: #fff; color: var(--blue-deep); }
.btn--light:hover { background: var(--blue-soft); transform: translateY(-1px); }
.btn--outline-light { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn--outline-light:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: .92rem; }
.btn[aria-disabled="true"] { background: var(--line); color: var(--ink-2); box-shadow: none; cursor: not-allowed; transform: none; pointer-events: none; }

/* ---------- Üst çubuk ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(244, 245, 249, .86); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid var(--line); }
.nav__in { display: flex; align-items: center; gap: 28px; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.28rem/1 var(--display); letter-spacing: -.02em; }
.brand svg { width: 30px; height: 30px; }
.nav__links { display: flex; gap: 26px; margin-left: 12px; }
.nav__links a { text-decoration: none; font-weight: 700; font-size: .95rem; color: var(--ink-2); padding: 6px 0; border-bottom: 2px solid transparent; }
.nav__links a:hover { color: var(--ink); border-bottom-color: var(--blue); }
.nav__actions { margin-left: auto; display: flex; gap: 10px; }

/* ---------- Kahraman alan ---------- */
.hero { padding-block: clamp(40px, 6vw, 88px) clamp(56px, 8vw, 104px); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr); gap: clamp(32px, 6vw, 96px); align-items: center; }
.hero h1 { font: 700 clamp(2.55rem, 5.5vw, 4.7rem)/1.02 var(--display); letter-spacing: -.035em; max-width: 13ch; }
.hero__lead { margin-top: 26px; max-width: 52ch; font-size: clamp(1.08rem, 1.5vw, 1.22rem); color: var(--ink-2); }
.hero__cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.facts { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 14px 32px; font-size: .95rem; font-weight: 700; color: var(--ink-2); }
.facts li { padding-left: 14px; border-left: 2px solid var(--blue); line-height: 1.2; }

.sheetwrap { position: relative; padding: 8px 0 56px; }
.sheet { width: min(100%, 480px); margin-inline: auto; transform: rotate(1.4deg); filter: drop-shadow(0 0 0 transparent); }
.sheet svg { width: 100%; height: auto; border-radius: 6px; box-shadow: var(--shadow-sheet); background: #fff; }
.sheet .bub { fill: none; stroke: var(--blue); stroke-width: 1.15; }
.sheet .let { fill: var(--blue); opacity: .55; font: 400 7.4px var(--text); text-anchor: middle; dominant-baseline: central; }
.sheet .num { fill: var(--ink-2); font: 700 9px var(--text); text-anchor: end; dominant-baseline: central; }
.sheet .hdr { fill: var(--ink-2); font: 700 9px var(--text); text-anchor: middle; }
.sheet .ttl { fill: var(--ink); font: 700 12px var(--display); }
.sheet .tm { fill: var(--ink); }
.sheet .pen { fill: var(--ink); opacity: 0; transition: opacity .16s ease-out; }
.sheet .pen.on { opacity: .92; }
.sheet .key { fill: none; stroke: var(--mark); stroke-width: 2; opacity: 0; transition: opacity .25s; }
.sheet .key.on { opacity: 1; }

.readout {
  position: absolute; left: clamp(0px, 2vw, 24px); bottom: 0; background: var(--ink); color: #fff; border-radius: 12px;
  padding: 16px 20px; display: grid; grid-template-columns: repeat(4, auto); gap: 4px 22px; box-shadow: 0 20px 40px -16px rgba(16, 24, 107, .55);
  opacity: 0; transform: translateY(10px); transition: opacity .45s .1s, transform .45s .1s;
}
.readout.on { opacity: 1; transform: none; }
.readout b { font: 700 1.55rem/1 var(--display); font-variant-numeric: tabular-nums; }
.readout span { font-size: .78rem; color: #b8bdd2; }
.readout div { display: flex; flex-direction: column; gap: 4px; }
.readout .net b { color: #fff; }

/* ---------- Bölümler ---------- */
.section { padding-block: clamp(72px, 10vw, 128px); }
.section--tight { padding-block: clamp(56px, 7vw, 88px); }
.h2 { font: 700 clamp(1.95rem, 3.6vw, 3.1rem)/1.07 var(--display); letter-spacing: -.028em; max-width: 20ch; }
.lead { margin-top: 18px; max-width: 58ch; color: var(--ink-2); font-size: 1.1rem; }
.sechead { margin-bottom: clamp(40px, 6vw, 72px); }

/* Akış: gerçek bir sıra olduğu için numaralı */
.flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; counter-reset: step; border-top: 2px solid var(--ink); }
.flow li { counter-increment: step; padding: 28px 24px 8px 0; position: relative; }
.flow li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.flow li::before {
  content: counter(step); position: absolute; top: -17px; left: 0; width: 32px; height: 32px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--ink); display: grid; place-items: center; font: 700 .9rem/1 var(--display);
}
.flow li + li::before { left: 24px; }
.flow li:last-child::before { background: var(--ink); color: #fff; }
.flow h3 { font: 700 1.12rem/1.25 var(--display); margin-top: 14px; letter-spacing: -.01em; }
.flow p { margin-top: 8px; font-size: .97rem; color: var(--ink-2); }

/* Özellik satırları */
.feature { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(28px, 5vw, 72px); align-items: center; }
.feature + .feature { margin-top: clamp(72px, 10vw, 136px); }
.feature__visual { grid-column: 1 / span 7; }
.feature__text { grid-column: 8 / span 5; }
.feature--flip .feature__visual { grid-column: 6 / span 7; order: 2; }
.feature--flip .feature__text { grid-column: 1 / span 5; order: 1; }
.feature h2 { font: 700 clamp(1.7rem, 2.8vw, 2.4rem)/1.1 var(--display); letter-spacing: -.025em; }
.feature p { margin-top: 16px; color: var(--ink-2); }
.ticks { margin-top: 22px; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 28px; font-size: .98rem; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .45em; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--blue); background: radial-gradient(circle, var(--blue) 0 4px, transparent 4.5px); }

/* Program penceresi örneği */
.win { min-width: 0; background: #fff; border-radius: 12px; box-shadow: var(--shadow-win); overflow: hidden; border: 1px solid var(--line); }
.win__bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: #eceef6; border-bottom: 1px solid var(--line); font-size: .82rem; font-weight: 700; color: var(--ink-2); }
.win__bar i { width: 10px; height: 10px; border-radius: 50%; background: #c4c9dc; }
.win__bar span { margin-left: 8px; }
.win__bar em { margin-left: auto; font-style: normal; font-weight: 400; color: var(--ink-2); }
.sum { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.sum div { padding: 16px 18px; border-right: 1px solid var(--line); }
.sum div:last-child { border-right: 0; }
.sum b { display: block; font: 700 1.5rem/1.1 var(--display); font-variant-numeric: tabular-nums; }
.sum span { font-size: .78rem; color: var(--ink-2); }
.tbl { width: 100%; border-collapse: collapse; font-size: .82rem; font-variant-numeric: tabular-nums; }
.tbl th { text-align: left; font-weight: 700; color: var(--ink-2); padding: 10px 11px; background: #f7f8fc; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 10px 11px; border-bottom: 1px solid #eceef6; white-space: nowrap; }
.tbl td.r, .tbl th.r { text-align: right; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl .up { color: var(--good); font-weight: 700; }
.tbl .dn { color: var(--warn); font-weight: 700; }
.tbl .miss td { background: #f1ebf8; font-style: italic; }
.scroll-x { overflow-x: auto; }

/* Karne örneği */
.card { background: #fff; border-radius: 6px; box-shadow: var(--shadow-sheet); border: 1px solid var(--line); padding: 22px 24px 20px; font-size: .78rem; max-width: 520px; margin-inline: auto; transform: rotate(-1deg); }
.card__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; border-bottom: 3px solid var(--blue); padding-bottom: 12px; }
.card__head b { font: 700 1.05rem/1.2 var(--display); }
.card__head span { color: var(--ink-2); font-size: .75rem; }
.card__stu { margin-top: 12px; padding: 9px 12px; background: var(--blue-soft); border-radius: 4px; display: flex; flex-wrap: wrap; gap: 4px 20px; }
.card__tiles { margin-top: 12px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.card__tiles div { border: 1px solid var(--line); border-radius: 4px; padding: 8px 10px; }
.card__tiles b { display: block; font: 700 1.2rem/1.1 var(--display); font-variant-numeric: tabular-nums; }
.card__tiles span { color: var(--ink-2); font-size: .7rem; }
.card .tbl { margin-top: 12px; font-size: .74rem; }
.card .tbl th, .card .tbl td { padding: 6px 8px; }
.card__chart { margin-top: 12px; border: 1px solid var(--line); border-radius: 4px; padding: 8px 10px 4px; }
.card__chart span { font-weight: 700; font-size: .72rem; }
.card__chart svg { width: 100%; height: 64px; }
.tag { display: inline-block; margin-top: 12px; font-size: .78rem; color: var(--ink-2); }

/* Ayrıca listesi */
.more { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(32px, 6vw, 96px); margin-top: clamp(64px, 9vw, 120px); border-top: 2px solid var(--ink); }
.more div { padding: 22px 0; border-bottom: 1px solid var(--line); }
.more dt { font: 700 1.1rem/1.3 var(--display); letter-spacing: -.01em; }
.more dd { margin-top: 6px; color: var(--ink-2); font-size: .98rem; }

/* Güvenlik */
.secure { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(28px, 5vw, 72px); }
.secure__lead { grid-column: 1 / span 5; }
.secure__list { grid-column: 7 / span 6; display: grid; gap: 0; }
.secure__list div { padding: 20px 0; border-top: 1px solid var(--line); }
.secure__list div:last-child { border-bottom: 1px solid var(--line); }
.secure__list dt { font: 700 1.08rem/1.3 var(--display); }
.secure__list dd { margin-top: 4px; color: var(--ink-2); font-size: .98rem; }

/* FMT bölümü */
.fmt { background: var(--blue-deep); color: #fff; position: relative; overflow: hidden; }
.fmt::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 14px; background: repeating-linear-gradient(180deg, rgba(255,255,255,.85) 0 18px, transparent 18px 34px); opacity: .55; }
.fmt .h2 { max-width: 17ch; }
.fmt .lead { color: #c8ccee; }
.fmt__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.ways { margin-top: 32px; display: grid; gap: 0; border-top: 1px solid rgba(255,255,255,.25); }
.ways li { padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.25); display: grid; grid-template-columns: 160px 1fr; gap: 16px; }
.ways b { font: 700 1.02rem/1.35 var(--display); }
.ways span { color: #c8ccee; font-size: .98rem; }
.fmt__cta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.codebox { margin-top: 36px; border-radius: 10px; background: #0b1150; border: 1px solid rgba(255,255,255,.18); overflow: hidden; }
.codebox__bar { padding: 10px 16px; font-size: .8rem; color: #b8bdd2; border-bottom: 1px solid rgba(255,255,255,.14); display: flex; justify-content: space-between; gap: 12px; }
.codebox pre { margin: 0; padding: 16px; overflow-x: auto; font: 400 .84rem/1.7 ui-monospace, "Cascadia Mono", Consolas, monospace; color: #dfe2ff; }
.codebox pre i { font-style: normal; color: #8f97e8; }

.panel { background: #fff; color: var(--ink); border-radius: 14px; padding: clamp(22px, 3vw, 36px); box-shadow: 0 30px 60px -24px rgba(0, 0, 20, .6); }
.panel h3 { font: 700 1.4rem/1.2 var(--display); letter-spacing: -.02em; }
.panel > p { margin-top: 8px; color: var(--ink-2); font-size: .97rem; }
.form { margin-top: 22px; display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; font-weight: 700; font-size: .9rem; }
.form input, .form textarea { border: 1.5px solid var(--line); border-radius: 8px; padding: 11px 13px; background: #fff; font-weight: 400; width: 100%; }
.form textarea { min-height: 104px; resize: vertical; }
.form input:focus, .form textarea:focus { outline: 3px solid var(--blue-soft); border-color: var(--blue); }
.form .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form small { font-weight: 400; color: var(--ink-2); font-size: .82rem; }
.status { min-height: 1.4em; font-size: .92rem; font-weight: 700; }
.status.err { color: #b3261e; }
.status.ok { color: var(--good); }

/* İndir */
.dl { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(28px, 5vw, 72px); align-items: start; }
.dl__text { grid-column: 1 / span 6; }
.dl__card { grid-column: 8 / span 5; background: #fff; border-radius: 14px; border: 1px solid var(--line); padding: clamp(22px, 3vw, 32px); box-shadow: var(--shadow-win); }
.dl__file { display: flex; gap: 16px; align-items: center; }
.dl__file svg { width: 48px; height: 48px; flex: none; }
.dl__file b { font: 700 1.2rem/1.2 var(--display); display: block; }
.dl__file span { color: var(--ink-2); font-size: .92rem; }
.dl__meta { margin: 22px 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.dl__meta div { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .93rem; }
.dl__meta dt { color: var(--ink-2); }
.dl__meta dd { font-weight: 700; text-align: right; overflow-wrap: anywhere; }
.dl__meta code { font: 400 .78rem/1.4 ui-monospace, Consolas, monospace; font-weight: 400; }
.dl__card .btn { width: 100%; }
.dl__note { margin-top: 14px; font-size: .86rem; color: var(--ink-2); }
.req { margin-top: 28px; display: grid; gap: 10px; }
.req li { position: relative; padding-left: 28px; }
.req li::before { content: ""; position: absolute; left: 0; top: .5em; width: 14px; height: 8px; border-left: 3px solid var(--blue); border-bottom: 3px solid var(--blue); transform: rotate(-45deg) translateY(-3px); }

details { border-bottom: 1px solid var(--line); }
details:first-of-type { border-top: 1px solid var(--line); }
summary { list-style: none; cursor: pointer; padding: 20px 40px 20px 0; font: 700 1.12rem/1.35 var(--display); letter-spacing: -.01em; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 11px; height: 11px; border-right: 2.5px solid var(--ink); border-bottom: 2.5px solid var(--ink); transform: translateY(-70%) rotate(45deg); transition: transform .2s; }
details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
details > div { padding: 0 0 22px; max-width: 70ch; color: var(--ink-2); }
details ol { margin-top: 10px; padding-left: 20px; list-style: decimal; display: grid; gap: 6px; }
details code { background: var(--blue-soft); padding: 2px 6px; border-radius: 4px; font-size: .9em; }
.sec-note { margin-top: 36px; max-width: 760px; }
.faq { max-width: 820px; }

/* Alt bilgi */
.foot { background: var(--ink); color: #c9cde0; padding-block: 48px 36px; }
.foot__in { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; align-items: flex-start; }
.foot .brand { color: #fff; }
.foot nav { display: flex; flex-wrap: wrap; gap: 10px 28px; }
.foot nav a { text-decoration: none; font-weight: 700; font-size: .95rem; }
.foot nav a:hover { color: #fff; text-decoration: underline; }
.foot small { display: block; margin-top: 32px; color: #8e93aa; font-size: .85rem; }

[hidden] { display: none !important; }

/* ---------- Duyarlı ---------- */
@media (max-width: 1020px) {
  .flow { grid-template-columns: 1fr; border-top: 0; border-left: 2px solid var(--ink); margin-left: 16px; }
  .flow li, .flow li + li { padding: 0 0 28px 36px; border-left: 0; }
  .flow li::before, .flow li + li::before { top: 0; left: -17px; }
  .flow h3 { margin-top: 2px; }
  .feature, .feature--flip { grid-template-columns: minmax(0, 1fr); }
  .feature__visual, .feature__text, .feature--flip .feature__visual, .feature--flip .feature__text { grid-column: 1 / -1; order: 0; }
  .secure__lead, .secure__list, .dl__text, .dl__card { grid-column: 1 / -1; }
  .fmt__grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .nav__links { display: none; }
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .hero h1 { max-width: 16ch; }
  .more { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .nav__in { gap: 12px; min-height: 64px; }
  .brand { font-size: 1.1rem; gap: 8px; }
  .brand svg { width: 26px; height: 26px; }
  .nav__actions { gap: 8px; }
  .nav__actions .btn { padding: 0 12px; min-height: 38px; font-size: .86rem; }
  .readout { left: 0; gap: 4px 16px; padding: 12px 16px; }
  .fmt::before { width: 8px; }
  .readout b { font-size: 1.25rem; }
  .ways li { grid-template-columns: 1fr; gap: 4px; }
  .form .row2 { grid-template-columns: 1fr; }
  .sum { grid-template-columns: repeat(2, 1fr); }
  .sum div:nth-child(2) { border-right: 0; }
  .sum div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .card { padding: 16px; }
  .btn { white-space: normal; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}