/* AlgoriTUS tanıtım sayfası. Görsel dil: optik cevap kâğıdı (teal "dropout" mürekkebi, kurşun kalem dolgusu,
   kenardaki zamanlama işaretleri). Renkler uygulamanın site.css'iyle aynı aileden: --form = --brand. */

@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  font-stretch: 75% 100%;
  src: url(/fonts/instrument-sans-latin-wdth-normal.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: "Instrument Sans";
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  font-stretch: 75% 100%;
  src: url(/fonts/instrument-sans-latin-ext-wdth-normal.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;
}

:root {
  color-scheme: light dark;

  --paper: #f4f7f6;
  --sheet: #ffffff;
  --ink: #16202c;
  --ink-2: #3f4b5b;
  --ink-3: #5f6c7d;
  --line: #d9e2e4;
  --form: #0e7c86;
  --form-strong: #0a5f67;
  --form-soft: #bfe0e3;
  --form-wash: #e6f3f4;
  --on-form: #ffffff;
  --graphite: #2c3136;
  --on-graphite: #ffffff;
  --mark: #c62f3e;
  --mark-wash: #fbe9eb;

  --font: "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
  --measure: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1719;
    --sheet: #132226;
    --ink: #e4eced;
    --ink-2: #b7c4c7;
    --ink-3: #8e9ea2;
    --line: #26383c;
    --form: #4db6c0;
    --form-strong: #7fd0d7;
    --form-soft: #2a5359;
    --form-wash: #17302f;
    --on-form: #07181a;
    --graphite: #dde4e6;
    --on-graphite: #0d1719;
    --mark: #f0808a;
    --mark-wash: #3a1d22;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { margin: 0; line-height: 1.15; text-wrap: balance; }
p { margin: 0; }
sup { font-size: .68em; line-height: 0; vertical-align: .45em; }
a { color: var(--form-strong); text-underline-offset: .18em; }
:focus-visible { outline: 3px solid var(--form); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 72rem; margin-inline: auto; padding-inline: var(--gutter); }

.skip {
  position: absolute; left: var(--gutter); top: -4rem;
  background: var(--sheet); color: var(--ink); padding: .5rem .9rem; border-radius: 6px; z-index: 10;
}
.skip:focus { top: .75rem; }

/* ── Düğmeler ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 2.875rem; padding: .6rem 1.35rem;
  border: 1.5px solid var(--form); border-radius: 8px;
  background: var(--form); color: var(--on-form);
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { background: var(--form-strong); border-color: var(--form-strong); }
.btn-line { background: transparent; color: var(--form-strong); border-color: var(--form-soft); }
.btn-line:hover { background: var(--form-wash); border-color: var(--form); color: var(--form-strong); }

/* ── Üst çubuk ────────────────────────────────────────────── */
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-block: 1.25rem;
}
.top .btn { min-height: 2.5rem; padding-inline: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); text-decoration: none; }
.brand-mark {
  display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: 11px;
  background: linear-gradient(135deg, #0e7c86 0%, #27a1ad 100%);
  color: #fff; font-weight: 700; font-size: .95rem;
}
.brand-name { font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; }
.brand-name span { color: var(--form); }

/* ── Giriş ────────────────────────────────────────────────── */
.hero { padding-block: clamp(2rem, 7vw, 5.5rem) clamp(3.5rem, 8vw, 6.5rem); }

.hero h1 {
  max-width: 14ch;
  font-size: clamp(2.9rem, 9vw, 6.4rem);
  font-stretch: 75%;
  font-weight: 640;
  line-height: .94;
  letter-spacing: -.012em;
  color: var(--ink);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.intro { max-width: var(--measure); padding-top: .35rem; }
.lede { font-size: clamp(1.125rem, 1.6vw, 1.3rem); line-height: 1.5; color: var(--ink-2); }
.actions { margin-top: 1.75rem; }
.note { margin-top: .9rem; font-size: .9375rem; color: var(--ink-3); max-width: 30rem; }

/* ── Cevap kâğıdı ─────────────────────────────────────────── */
.sheet {
  position: relative;
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.35rem 1.5rem 1.6rem 3rem;
  box-shadow: 0 1px 0 var(--line), 0 22px 40px -30px rgba(10, 79, 86, .45);
}

.sheet-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding-bottom: .8rem; margin-bottom: 1rem;
  border-bottom: 1px solid var(--form-soft);
  color: var(--form-strong); font-size: .875rem;
}
.sheet-head h2 { font-size: .875rem; font-weight: 600; }

.question { border: 0; margin: 0; padding: 0; min-width: 0; }
.question legend {
  padding: 0; margin-bottom: 1rem;
  font-size: 1.0625rem; font-weight: 600; line-height: 1.45; color: var(--ink);
}

.opt {
  position: relative;
  display: grid; grid-template-columns: 1.9rem minmax(0, 1fr) auto; align-items: center; gap: .8rem;
  padding: .45rem .55rem; margin-inline: -.55rem;
  border-radius: 6px; cursor: pointer;
}
/* Optik formun kenarındaki zamanlama işaretleri: her şık satırına bir tane. */
.opt::before {
  content: ""; position: absolute; left: -1.95rem; top: 50%;
  width: .85rem; height: .3rem; margin-top: -.15rem;
  background: var(--graphite); opacity: .82;
}
.opt:hover { background: var(--form-wash); }
.opt input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; pointer-events: none; }

.bubble {
  display: grid; place-items: center;
  width: 1.9rem; height: 1.9rem; border-radius: 50%;
  border: 1.5px solid var(--form); color: var(--form-strong);
  font-size: .8125rem; font-weight: 600; font-stretch: 85%;
  transition: background-color .12s ease, color .12s ease, border-color .12s ease, transform .12s ease;
}
.opt input:checked + .bubble {
  background: var(--graphite); border-color: var(--graphite); color: var(--on-graphite);
  transform: scale(1.06);
}
.opt input:focus-visible + .bubble { outline: 3px solid var(--form); outline-offset: 3px; }
.opt-text { color: var(--ink-2); }
.opt input:checked ~ .opt-text { color: var(--ink); }

.opt-tag { font-size: .8125rem; font-weight: 600; white-space: nowrap; }

.sheet[data-phase="result"] .opt { cursor: default; }
.sheet[data-phase="result"] .opt:hover { background: transparent; }
.opt.is-key .bubble { box-shadow: 0 0 0 3px var(--sheet), 0 0 0 5px var(--form); }
.opt.is-key .opt-tag { color: var(--form-strong); }
.opt.is-wrong .opt-text, .opt.is-wrong .opt-tag { color: var(--mark); }

.confidence { margin-top: 1.35rem; }
.conf-q { font-weight: 600; margin-bottom: .6rem; }
.conf-btns { display: flex; flex-wrap: wrap; gap: .5rem; }
.conf-btns button {
  min-height: 2.75rem; min-width: 6.5rem; padding: .5rem 1.1rem;
  border: 1.5px solid var(--form-soft); border-radius: 8px;
  background: var(--sheet); color: var(--ink);
  font: inherit; font-weight: 600; cursor: pointer;
  transition: background-color .12s ease, border-color .12s ease, opacity .12s ease;
}
.conf-btns button:hover:not(:disabled) { background: var(--form-wash); border-color: var(--form); }
.conf-btns button:disabled { opacity: .45; cursor: not-allowed; }
.conf-hint { margin-top: .6rem; font-size: .875rem; color: var(--ink-3); }

.sheet[data-phase="result"] .confidence { display: none; }

.result {
  margin-top: 1.35rem; padding-top: 1.2rem;
  border-top: 1.5px dashed var(--form-soft);
}
.verdict { font-size: 1.5rem; font-stretch: 85%; font-weight: 650; }
.verdict:focus { outline: none; }
.result[data-tone="good"] .verdict { color: var(--form-strong); }
.result[data-tone="bad"] .verdict { color: var(--mark); }
.verdict-text { margin-top: .35rem; color: var(--ink-2); }

.meter { margin-top: 1.1rem; }
.meter-label { font-size: .875rem; color: var(--ink-3); }
.meter-row { display: grid; grid-template-columns: 3rem minmax(0, 1fr) 3rem; align-items: center; gap: .75rem; margin-top: .3rem; }
.meter-num { font-weight: 600; font-variant-numeric: tabular-nums; color: var(--ink-3); }
.meter-num-after { text-align: right; color: var(--ink); font-size: 1.25rem; }
.meter-track { position: relative; height: .6rem; border-radius: 999px; background: var(--form-wash); overflow: hidden; }
.meter-fill {
  position: absolute; inset: 0 auto 0 0; width: 0;
  background: var(--form); border-radius: 999px;
  transition: width .7s cubic-bezier(.2, .7, .2, 1);
}
.result[data-tone="bad"] .meter-fill { background: var(--mark); }
.meter-before { position: absolute; top: -2px; bottom: -2px; width: 2px; margin-left: -1px; left: 0; background: var(--ink-3); z-index: 1; }
.meter-foot { margin-top: .55rem; font-size: .8125rem; line-height: 1.5; color: var(--ink-3); }

.explain { margin-top: 1.1rem; padding: .9rem 1rem; border-radius: 6px; background: var(--form-wash); font-size: .9375rem; color: var(--ink-2); }
.explain strong { color: var(--ink); }
.result .btn-line { margin-top: 1.1rem; }

/* ── Güven × doğruluk ─────────────────────────────────────── */
.band { background: var(--sheet); border-block: 1px solid var(--line); padding-block: clamp(3.5rem, 8vw, 6rem); }

.section-head { max-width: 44rem; }
.section-head h2, .after h2, .closing h2 { font-size: clamp(1.65rem, 3.4vw, 2.4rem); font-stretch: 85%; font-weight: 650; letter-spacing: -.005em; }
.section-head p { margin-top: .9rem; color: var(--ink-2); max-width: var(--measure); }

.matrix {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: .75rem;
  margin-top: 2.5rem;
}
.axis { font-size: .875rem; font-weight: 600; color: var(--form-strong); }
.axis-col { grid-row: 1; padding-left: .25rem; }
.axis-col-1 { grid-column: 2; }
.axis-col-2 { grid-column: 3; }
.axis-row { grid-column: 1; writing-mode: vertical-rl; transform: rotate(180deg); text-align: center; padding-inline: .1rem; }
.axis-row-1 { grid-row: 2; }
.axis-row-2 { grid-row: 3; }
#q-emin-dogru { grid-column: 2; grid-row: 2; }
#q-emin-yanlis { grid-column: 3; grid-row: 2; }
#q-dogru-emin-degil { grid-column: 2; grid-row: 3; }
#q-yanlis-emin-degil { grid-column: 3; grid-row: 3; }

.cell {
  padding: 1.25rem 1.35rem 1.4rem;
  border: 1px solid var(--line); border-radius: 6px;
  background: var(--paper);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.cell h3 { font-size: 1.2rem; font-weight: 650; font-stretch: 90%; }
.cell p { margin-top: .45rem; color: var(--ink-2); max-width: 30rem; }
.cell-bad { background: var(--mark-wash); border-color: color-mix(in srgb, var(--mark) 35%, transparent); }
.cell-bad h3 { color: var(--mark); }
.cell.is-current { border-color: var(--form); box-shadow: inset 0 0 0 1px var(--form); }
.cell-bad.is-current { border-color: var(--mark); box-shadow: inset 0 0 0 1px var(--mark); }
.cell-you { display: block; margin-top: .7rem; font-size: .8125rem; font-weight: 600; color: var(--form-strong); }
.cell-bad .cell-you { color: var(--mark); }

/* ── Cevaptan sonra ───────────────────────────────────────── */
.after { padding-block: clamp(3.5rem, 8vw, 6rem) clamp(2.5rem, 6vw, 4rem); }
.after-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3.5rem); margin-top: 2rem; }
.after-grid h3 { font-size: 1.2rem; font-weight: 650; font-stretch: 90%; padding-top: .9rem; border-top: 2px solid var(--form); }
.after-grid p { margin-top: .5rem; color: var(--ink-2); }

/* ── Kapanış ──────────────────────────────────────────────── */
.closing { padding-block: clamp(2.5rem, 6vw, 4rem) clamp(3.5rem, 8vw, 5.5rem); }
.closing .actions { margin-top: 1.25rem; }

.foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1.5rem;
  padding-block: 1.5rem 2rem; border-top: 1px solid var(--line);
  font-size: .875rem; color: var(--ink-3);
}
.foot a { color: var(--ink-3); }

/* ── 404 ──────────────────────────────────────────────────── */
.lost { padding-block: clamp(3rem, 10vw, 7rem); }
.lost h1 { font-size: clamp(2.4rem, 7vw, 4.5rem); font-stretch: 75%; font-weight: 640; line-height: .98; }
.lost p { margin-top: 1rem; color: var(--ink-2); max-width: var(--measure); }
.lost .actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* ── Dar ekran ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .after-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .matrix { grid-template-columns: minmax(0, 1fr); grid-template-rows: none; }
  .matrix .axis { display: none; }
  .matrix .cell { grid-column: 1 !important; grid-row: auto !important; }
  .sheet { padding: 1.1rem 1rem 1.3rem 2.1rem; }
  .opt::before { left: -1.2rem; width: .6rem; }
  .opt { gap: .65rem; grid-template-columns: 1.9rem minmax(0, 1fr); }
  .opt-tag { grid-column: 2; }
  .conf-btns button { flex: 1 1 0; min-width: 0; }
  .top .brand-name { font-size: 1.05rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}