/* OZ UI Design · landing
   Kareli Defter: açık temada kareli kâğıt, koyu temada mimari çizim (blueprint).
   Renk ve yazı değerleri uygulamadaki AppPalette / AppTheme ile aynıdır. */

:root {
  --paper: #fbfcfe;
  --surface: #ffffff;
  --grid: #e3e9f4;
  --ink: #1b2a4a;
  --ink-muted: #4a5b7d;
  --cobalt: #2344c9;
  --on-cobalt: #ffffff;
  --highlighter: #ffe14d;
  --hard-shadow: #1b2a4a;
  --redline: #e5306b;
  --tinted: #f3f6fb;

  --font-display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --radius: 4px;
  --stroke: 1.5px;
  --cell: 20px;
  --gutter: clamp(16px, 4vw, 48px);
  color-scheme: light;
}

/* Koyu tema (blueprint): sadece kullanıcı seçince (<html data-theme="dark">).
   Varsayılan açık tema; sistem teması izlenmez. Seçim uygulamayla paylaşılır. */
:root[data-theme="dark"] {
  --paper: #0f2147;
  --surface: #132a57;
  --grid: #1d3a72;
  --ink: #e6eeff;
  --ink-muted: #a9bce3;
  --cobalt: #8fb0ff;
  --on-cobalt: #0b1a3a;
  --highlighter: rgba(255, 225, 77, 0.4);
  --hard-shadow: #07122b;
  --tinted: #112650;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-wrap: balance;
  margin: 0;
}

h2 {
  font-size: clamp(30px, 4.2vw, 44px);
}

h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 10;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- Ortak parçalar ---------- */

.grid-paper {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
}

.sketch {
  background: var(--surface);
  border: var(--stroke) solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--hard-shadow);
}

.eyebrow {
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--cobalt);
  margin-bottom: 16px;
}

.note {
  font: 500 12px/1.4 var(--font-mono);
  color: var(--ink-muted);
}

mark {
  color: inherit;
  background: linear-gradient(transparent 56%, var(--highlighter) 56%, var(--highlighter) 92%, transparent 92%);
  padding: 0 2px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 20px;
  border: var(--stroke) solid var(--ink);
  border-radius: 3px;
  font: 600 15px/1 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.button--primary {
  background: var(--cobalt);
  border-color: var(--cobalt);
  color: var(--on-cobalt);
}

.button--highlight {
  /* Her iki temada da tam fosforlu sarı (koyu temadaki yarı saydam değil). */
  background: #ffe14d;
  color: #1b2a4a;
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--hard-shadow);
}

.button--small {
  min-height: 38px;
  padding: 0 14px;
  font-size: 14px;
}

.button:hover {
  transform: translate(-1px, -1px);
}

.button--highlight:hover {
  box-shadow: 5px 5px 0 var(--hard-shadow);
}

.chip {
  padding: 6px 12px;
  background: var(--surface);
  color: var(--ink);
  border: var(--stroke) solid var(--ink);
  border-radius: 3px;
  font: 500 14px/1.3 var(--font-body);
  cursor: pointer;
}

.chip:hover {
  background: var(--highlighter);
}

/* ---------- Üst menü ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--paper);
  border-bottom: var(--stroke) solid var(--ink);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand img {
  border-radius: 7px;
}

.brand__name {
  font: 800 22px/1 var(--font-display);
  letter-spacing: -0.02em;
}

.brand__tag {
  font: 500 12px/1 var(--font-mono);
  color: var(--ink-muted);
}

.brand--small .brand__name {
  font-size: 16px;
}

.nav__links {
  display: flex;
  gap: 24px;
  margin-left: 16px;
}

.nav__links a {
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-muted);
}

.nav__links a:hover {
  color: var(--ink);
}

.nav__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang {
  display: inline-flex;
  padding: 2px;
  border: var(--stroke) solid var(--ink);
  border-radius: var(--radius);
}

.lang__option {
  padding: 4px 8px;
  border: 0;
  border-radius: 3px;
  background: none;
  color: var(--ink-muted);
  font: 600 12px/1 var(--font-mono);
  cursor: pointer;
}

.lang__option[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: none;
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--tinted);
}

.theme-toggle svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Koyu temadayken güneş (açığa geç), açıkta ay (koyuya geç) görünür. */
.theme-toggle .icon-sun,
:root[data-active-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

:root[data-active-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* ---------- Kahraman ---------- */

.hero {
  border-bottom: var(--stroke) solid var(--ink);
  overflow: hidden;
}

.hero__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: var(--gutter);
  padding-block: clamp(48px, 8vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero__copy {
  min-width: 0;
}

.hero__title {
  font-size: clamp(38px, 5.6vw, 64px);
  margin-bottom: 20px;
}

.hero__lead {
  font-size: clamp(17px, 1.6vw, 19px);
  color: var(--ink-muted);
  max-width: 58ch;
  margin-bottom: 32px;
}

.prompt {
  padding: 16px;
  display: grid;
  gap: 12px;
}

.prompt textarea {
  width: 100%;
  border: 0;
  resize: vertical;
  min-height: 84px;
  background: transparent;
  color: var(--ink);
  font: 400 17px/1.5 var(--font-body);
}

.prompt textarea:focus {
  outline: none;
}

.prompt:focus-within {
  box-shadow: 4px 4px 0 var(--cobalt);
}

.prompt textarea::placeholder {
  color: var(--ink-muted);
  opacity: 0.8;
}

.prompt__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.examples {
  margin-top: 28px;
  display: grid;
  gap: 10px;
}

.examples__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Sağdaki artboard'lar: canvas'taki gibi, biri seçili. Yükseklik genişliğe
   orantılı; böylece her ekran boyutunda görseller kutuya sığar. */
.hero__visual {
  margin: 0;
  min-width: 0;
  width: 100%;
  max-width: 500px;
  justify-self: center;
  display: grid;
  gap: 12px;
}

.hero__stack {
  position: relative;
  /* Artboard genişliği %54; telefon ekranı 390:844 + etiket + kayma payı. */
  aspect-ratio: 100 / 130;
}

.artboard {
  position: absolute;
  width: 54%;
}

.artboard img {
  border: 1px solid var(--grid);
  box-shadow: 0 18px 40px rgba(16, 24, 48, 0.18);
  background: #fff;
}

.artboard__label {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  font: 600 13px/1 var(--font-body);
}

.artboard--back {
  right: 2%;
  top: 7%;
  transform: rotate(3deg);
  opacity: 0.95;
}

.artboard--front {
  left: 4%;
  top: 1%;
  transform: rotate(-2deg);
}

.is-selected img {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
}

.redline {
  font: 500 11px/1 var(--font-mono);
  color: var(--redline);
}

.hero__visual figcaption {
  justify-self: end;
}

/* ---------- Bölümler ---------- */

.section {
  padding-block: clamp(64px, 9vw, 112px);
  padding-inline: var(--gutter);
}

.section--tinted {
  background: var(--tinted);
  border-block: var(--stroke) solid var(--ink);
}

.section__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: 760px;
}

.section h2 {
  margin-bottom: 40px;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.step {
  padding: 24px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.step__number {
  font: 500 13px/1 var(--font-mono);
  color: var(--cobalt);
}

.step p {
  color: var(--ink-muted);
}

.feature-lead {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  margin-bottom: 56px;
}

.feature-lead__copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.feature-lead__copy h3 {
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 800;
}

.feature-lead__copy p {
  color: var(--ink-muted);
}

.feature-lead__visual {
  margin: 0;
  padding: 8px;
  min-width: 0;
}

.checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.checks li {
  display: flex;
  gap: 10px;
  align-items: baseline;
}

.checks li::before {
  content: "✓";
  font-weight: 700;
  color: var(--cobalt);
}

.features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px 24px;
}

.feature {
  display: grid;
  gap: 10px;
  align-content: start;
}

.feature p {
  color: var(--ink-muted);
  font-size: 15px;
}

.feature__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: var(--stroke) solid var(--ink);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature__icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature__icon .accent {
  stroke: var(--cobalt);
}

/* ---------- SSS ---------- */

.faq {
  border-top: var(--stroke) solid var(--ink);
}

.faq details {
  border-bottom: var(--stroke) solid var(--ink);
  padding: 4px 0;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font: 600 18px/1.35 var(--font-body);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  font: 500 22px/1 var(--font-mono);
  color: var(--cobalt);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  color: var(--ink-muted);
  padding-bottom: 16px;
  max-width: 62ch;
}

/* ---------- Kapanış ----------
   Temayı izler: açıkta kareli defter, koyuda blueprint (.grid-paper). */

.cta {
  border-top: var(--stroke) solid var(--ink);
  padding-block: clamp(72px, 10vw, 128px);
  padding-inline: var(--gutter);
  text-align: center;
}

.cta__inner {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
  justify-items: center;
}

.cta p {
  color: var(--ink-muted);
  font-size: 18px;
}

/* ---------- Alt bilgi ---------- */

.footer {
  border-top: var(--stroke) solid var(--ink);
  padding-inline: var(--gutter);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding-block: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

/* ---------- Duyarlı yerleşim ---------- */

@media (max-width: 960px) {
  .hero__inner,
  .feature-lead {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__visual {
    max-width: 440px;
  }

  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .nav__links {
    display: none;
  }

  .steps {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .nav__inner {
    gap: 12px;
  }

  .brand__tag {
    display: none;
  }


  .features {
    grid-template-columns: minmax(0, 1fr);
  }

  .prompt__footer .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }

  .button:hover {
    transform: none;
  }
}

/* Arkadaki ekranın etiketi öndekinin arkasında yarım kalıyordu. */
.artboard--back .artboard__label {
  visibility: hidden;
}