/* NoteRun — noterun.fatihkacar.com
 *
 * Renkler uygulama simgesinden: turuncu zemin (#FD9201), kâğıt beyazı belge,
 * koyu simgenin kömür rengi (#18181A). Beyaz yazı turuncu üstünde 2,3:1
 * kalıyor; turuncu zeminde yazı kömür rengi (7,8:1). Beyaz üstünde turuncu
 * yazı gerekirse koyusu (#A85A00, 5,1:1).
 *
 * Yazı tipi indirilmiyor: Apple aygıtlarında sistemin yazısı (SF), kod için
 * sistemin eş aralıklısı. Site hiçbir üçüncü tarafa istek göndermiyor.
 */

:root {
  --marigold: #FD9201;
  --marigold-deep: #A85A00;
  --charcoal: #18181A;
  --paper: #FFFFFF;

  --field: var(--marigold);
  --field-ink: var(--charcoal);
  --field-soft: var(--charcoal);
  --page: var(--paper);
  --text: var(--charcoal);
  --text-soft: #55555B;
  --rule: #E7E5E2;
  --link-line: var(--marigold);
  --sheet: var(--paper);
  --sheet-rule: #ECEAE7;
  --code-bg: #F4F4F5;
  --fold: #E6E2DC;
  --prompt: var(--marigold-deep);
  --marker: var(--marigold-deep);
  --focus: var(--charcoal);
  --shadow: rgba(24, 24, 26, 0.28);
  --us: #FFF2DF;

  --measure: 38rem;
  --wrap: 68rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  color-scheme: light dark;
}

/* Karanlıkta koyu simge: kömür zemin, turuncu belge. */
@media (prefers-color-scheme: dark) {
  :root {
    --field: var(--charcoal);
    --field-ink: var(--marigold);
    --field-soft: #C9C9CE;
    --page: var(--charcoal);
    --text: #EDEDEF;
    --text-soft: #A9A9AF;
    --rule: #2E2E33;
    --sheet: #242427;
    --sheet-rule: #36363C;
    --code-bg: #1C1C1F;
    --fold: #3C3C42;
    --prompt: var(--marigold);
    --marker: var(--marigold);
    --focus: var(--marigold);
    --shadow: rgba(0, 0, 0, 0.55);
    --us: #2E2418;
  }
}

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

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

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 400 1.0625rem/1.6 var(--font);
  font-kerning: normal;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: var(--link-line);
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 0.22em;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

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

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: var(--gutter);
  top: 0.75rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--page);
  color: var(--text);
}

/* Başlık çubuğu: simgenin zemini. Açık temada simge zeminle birleşiyor,
   yalnız beyaz belge kalıyor. */
.masthead {
  background: var(--field);
  color: var(--field-ink);
  --link-line: color-mix(in srgb, currentColor 45%, transparent);
  --focus: var(--field-ink);
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 22.5%;
}

.bar nav,
.colophon nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.bar nav a {
  font-weight: 500;
}

/* MARK: Ana sayfa */

.hero {
  color: var(--field-ink);
  --link-line: var(--field-ink);
  --focus: var(--field-ink);
  /* Zemin sayfanın kâğıdına defterin ortasında geçiyor: sayfa simgedeki
     belge gibi turuncunun üstünde duruyor. */
  background: linear-gradient(to bottom, var(--field) calc(100% - 9rem), var(--page) calc(100% - 9rem));
  padding-top: clamp(2rem, 6vw, 4.5rem);
}

.hero h1 {
  margin: 0 0 1.25rem;
  max-width: 15ch;
  font-size: clamp(2.5rem, 1.35rem + 4.6vw, 4.75rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.lede {
  margin: 0;
  max-width: 34rem;
  color: var(--field-soft);
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.3125rem);
  line-height: 1.5;
}

.notebook {
  margin: clamp(2.25rem, 5vw, 3.25rem) 0 0;
  max-width: 40rem;
  color: var(--text);
  filter: drop-shadow(0 24px 28px var(--shadow)) drop-shadow(0 2px 3px var(--shadow));
}

/* Simgedeki gibi sağ üst köşesi kıvrık kâğıt. */
.sheet {
  --ear: clamp(2rem, 5vw, 2.75rem);
  position: relative;
  padding: clamp(1.25rem, 3vw, 1.75rem) clamp(1rem, 3vw, 1.75rem) clamp(1.5rem, 3vw, 2rem);
  border-radius: 14px;
  background: var(--sheet);
  clip-path: polygon(0 0, calc(100% - var(--ear)) 0, 100% var(--ear), 100% 100%, 0 100%);
}

.sheet::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: var(--ear);
  height: var(--ear);
  border-bottom-left-radius: 7px;
  background: linear-gradient(to bottom left, transparent calc(50% - 0.5px), var(--fold) 50%);
}

.cell {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  column-gap: 0.75rem;
  align-items: start;
}

.prompt {
  display: grid;
  padding-top: 0.8rem;
  color: var(--prompt);
  font: 600 0.8125rem/1.7 var(--mono);
  text-align: right;
}

.prompt > span {
  grid-area: 1 / 1;
}

.prompt .running {
  visibility: hidden;
}

.code {
  margin: 0;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--code-bg);
  font: 0.875rem/1.7 var(--mono);
  tab-size: 4;
}

.code .kw {
  font-weight: 700;
}

.code .str {
  color: var(--prompt);
}

.output {
  margin: 1rem 0 0 3.25rem;
  border-collapse: collapse;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

.output th,
.output td {
  padding: 0.35rem 1.5rem 0.35rem 0;
  border-bottom: 1px solid var(--sheet-rule);
  text-align: left;
}

.output td {
  padding-right: 0;
  text-align: right;
}

.output thead th {
  color: var(--text-soft);
  font-weight: 600;
}

.output tbody th {
  font-weight: 500;
}

/* Telefonda kod satırları kaymadan sığsın: dar sütun, küçük kod yazısı. */
@media (max-width: 30rem) {
  .cell {
    grid-template-columns: 1.9rem minmax(0, 1fr);
    column-gap: 0.4rem;
  }

  .prompt {
    padding-top: 0.65rem;
    font-size: 0.75rem;
  }

  .code {
    padding: 0.6rem 0.7rem;
    font-size: 0.78rem;
  }

  .output {
    margin-left: 2.3rem;
  }
}

/* Tek hareket: hücre çalışıyor, sonra çıktısı geliyor. Hareketi azaltanlar
   ve eski tarayıcılar son hâli görüyor. */
@media (prefers-reduced-motion: no-preference) {
  .notebook .running {
    visibility: visible;
    animation: vanish 0s linear 1.3s forwards;
  }

  .notebook .done {
    visibility: hidden;
    animation: appear 0s linear 1.3s forwards;
  }

  .notebook .output {
    opacity: 0;
    transform: translateY(6px);
    animation: reveal 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) 1.35s forwards;
  }
}

@keyframes vanish {
  to { visibility: hidden; }
}

@keyframes appear {
  to { visibility: visible; }
}

@keyframes reveal {
  to { opacity: 1; transform: none; }
}

.section-title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.5rem, 1.15rem + 1.4vw, 2.125rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.features {
  padding-top: clamp(3rem, 7vw, 4.5rem);
}

.features ul {
  display: grid;
  gap: 1.75rem 3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 40rem) {
  .features ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 62rem) {
  .features ul {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.features h3 {
  margin: 0 0 0.3rem;
  font-size: 1.125rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.features p {
  margin: 0;
  color: var(--text-soft);
}

/* Karşılaştırma: NoteRun sütunu simgenin turuncusunun açığıyla ayrılıyor.
   Telefonda her satır bir blok, hücrelerin başında uygulamanın adı. */
.compare {
  padding-top: clamp(3.5rem, 8vw, 5.5rem);
}

.compare-lede {
  margin: -0.75rem 0 1.75rem;
  max-width: 36rem;
  font-size: 1.1875rem;
  line-height: 1.5;
}

.versus {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.versus th,
.versus td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.versus thead th {
  font-size: 1rem;
  font-weight: 700;
}

.versus tbody th {
  width: 28%;
  font-weight: 600;
}

.versus .us {
  background: var(--us);
  font-weight: 600;
}

.versus thead .us {
  border-top: 4px solid var(--marigold);
}

.source {
  margin: 0.75rem 0 0;
  color: var(--text-soft);
  font-size: 0.8125rem;
}

@media (max-width: 40rem) {
  .versus thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .versus,
  .versus tbody {
    display: block;
  }

  .versus tr {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--rule);
  }

  .versus tbody th {
    grid-column: 1 / -1;
    width: auto;
    padding: 0;
    border: 0;
  }

  .versus td {
    padding: 0.45rem 0.55rem;
    border: 0;
    border-radius: 8px;
    font-size: 0.875rem;
  }

  .versus td::before {
    content: attr(data-app);
    display: block;
    color: var(--text-soft);
    font-size: 0.75rem;
    font-weight: 600;
  }
}

.availability {
  padding-block: clamp(3rem, 7vw, 4.5rem);
}

.availability p {
  margin: 0;
  max-width: var(--measure);
  color: var(--text-soft);
}

.availability .soon {
  margin-bottom: 0.4rem;
  color: var(--text);
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* MARK: Metin sayfaları (gizlilik, 404) */

.prose {
  padding-block: clamp(2.25rem, 6vw, 4rem);
}

.prose > * {
  max-width: var(--measure);
}

.prose h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.prose h1 span {
  display: block;
  color: var(--text-soft);
}

/* Tarih satırı, sonra metnin özeti. */
.prose h1 + p {
  color: var(--text-soft);
  font-size: 0.9375rem;
}

.prose h1 + p em {
  font-style: normal;
}

.prose h1 + p + p {
  font-size: 1.1875rem;
  line-height: 1.55;
}

.prose h2 {
  margin: 2.5rem 0 0.6rem;
  font-size: 1.3125rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.prose p,
.prose ul {
  margin: 0 0 1rem;
}

.prose ul {
  padding-left: 1.25rem;
}

.prose li {
  margin: 0.4rem 0;
}

.prose li::marker {
  color: var(--marker);
}

.site-note {
  margin-top: 3rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--rule);
}

/* MARK: İletişim */

.contact {
  padding-block: clamp(2.25rem, 6vw, 4rem);
}

.contact h1 {
  margin: 0;
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.contact h1 span {
  display: block;
}

.contact h1 span[lang="tr"] {
  color: var(--text-soft);
}

.email {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 clamp(2rem, 5vw, 3rem);
  font-size: clamp(1.375rem, 0.95rem + 2.6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.email a {
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

.columns {
  display: grid;
  gap: 1.5rem 3.5rem;
}

@media (min-width: 46rem) {
  .columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.columns p {
  margin: 0 0 1rem;
  max-width: 32rem;
}

/* MARK: Alt bilgi */

.colophon {
  border-top: 1px solid var(--rule);
  color: var(--text-soft);
  font-size: 0.9375rem;
}

.colophon .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding-block: 2rem 3rem;
}

.colophon p {
  margin: 0;
}