/* ===========================================================================
   site.css — Devixa Yazılım tanıtım sitesi

   Renk paleti bilerek menü sisteminin (qr-menu/assets/base.css) tokenlarıyla
   aynı: aynı indigo (#4f46e5). İki mülk yan yana görülünce aynı marka olduğu
   anlaşılsın diye.

   Tema: koyu varsayılan. Tanıtım sayfası koyu zeminde daha iyi duruyor ve
   içindeki AÇIK renkli telefon önizlemesi (gerçek menü) böylece öne çıkıyor.
   Sistemi açık temada olan ziyaretçi için ayrıca açık palet tanımlı.
   ======================================================================== */

:root {
  color-scheme: dark;

  --bg:        #0b0b0f;
  --bg-2:      #101017;
  --surface:   #16161f;
  --surface-2: #1c1c27;
  --line:      #26262f;
  --line-soft: #1e1e27;

  --text:      #f2f2f5;
  --dim:       #a6a6b4;
  --faint:     #71717f;

  --accent:      #6366f1;
  --accent-2:    #8b5cf6;
  --accent-soft: rgba(99, 102, 241, .14);
  --wa:          #22c55e;
  --wa-ink:      #05230f;

  --radius:    14px;
  --radius-lg: 22px;
  --wrap:      1140px;

  --font: system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI",
          Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg:        #f7f7fa;
    --bg-2:      #ffffff;
    --surface:   #ffffff;
    --surface-2: #f2f2f6;
    --line:      #e4e4ea;
    --line-soft: #ededf2;
    --text:      #14141a;
    --dim:       #55555f;
    --faint:     #8a8a96;
    --accent:      #4f46e5;
    --accent-2:    #7c3aed;
    --accent-soft: rgba(79, 70, 229, .10);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg, iframe { max-width: 100%; display: block; }
a { color: inherit; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

/* --------------------------------------------------------------- ÜST BAR */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, background .2s;
}
.nav.stuck { border-bottom-color: var(--line); }

.nav-in { display: flex; align-items: center; gap: 18px; height: 66px; }

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; padding: 6px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 2.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.brand-mark span { background: #fff; border-radius: 1.5px; opacity: .92; }
.brand-mark span:nth-child(2) { opacity: .5; }
.brand-mark span:nth-child(3) { opacity: .68; }

.brand-txt { font-size: 19px; letter-spacing: -.02em; }
.brand-txt b { color: var(--accent); }
.brand-txt.small { font-size: 16px; }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 13px; border-radius: 9px; text-decoration: none;
  color: var(--dim); font-size: 14.5px; font-weight: 500;
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }

.burger { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.burger span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; }
.burger span + span { margin-top: 4px; }

/* --------------------------------------------------------------- BUTONLAR */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 11px; border: 1px solid transparent;
  font: inherit; font-weight: 650; font-size: 15px; text-decoration: none;
  cursor: pointer; transition: transform .12s, filter .15s, background .15s, border-color .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 18px; height: 18px; fill: currentColor; }

.btn-wa { background: var(--wa); color: var(--wa-ink); }
.btn-wa:hover { filter: brightness(1.07); }

.btn-ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: var(--surface); border-color: var(--accent); }

.btn-sm { padding: 9px 15px; font-size: 14px; border-radius: 10px; }
.btn-lg { padding: 16px 30px; font-size: 17px; border-radius: 13px; }

/* --------------------------------------------------------------- HERO */
.hero { position: relative; overflow: hidden; padding: 74px 0 84px; }

.hero-glow {
  position: absolute; inset: -30% -10% auto -10%; height: 620px; pointer-events: none;
  background:
    radial-gradient(46% 52% at 22% 30%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 70%),
    radial-gradient(40% 44% at 78% 18%, color-mix(in srgb, var(--accent-2) 24%, transparent), transparent 72%);
  filter: blur(28px); opacity: .82;
}

.hero-in {
  position: relative;
  display: grid; grid-template-columns: 1.25fr .75fr; gap: 54px; align-items: center;
}

.eyebrow {
  margin: 0 0 14px; font-size: 12.5px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
}

h1 {
  margin: 0 0 18px; font-size: clamp(33px, 5.1vw, 55px); line-height: 1.08;
  letter-spacing: -.03em; font-weight: 800;
}
.hl {
  background: linear-gradient(105deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.lead { margin: 0 0 28px; font-size: 17.5px; color: var(--dim); max-width: 54ch; }

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }

.hero-facts { list-style: none; display: flex; gap: 30px; flex-wrap: wrap; margin: 0; padding: 0; }
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts b { font-size: 17px; letter-spacing: -.01em; }
.hero-facts span { font-size: 13px; color: var(--faint); }

/* Karekod kartı */
.hero-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 22px; text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .28);
}
.qr-frame {
  background: #fff; border-radius: 16px; padding: 14px; display: grid; place-items: center;
}
.qr-box { width: 100%; max-width: 210px; }
.qr-box canvas, .qr-box svg { width: 100% !important; height: auto !important; display: block; }
.qr-cap { margin: 15px 0 6px; font-size: 13.5px; color: var(--dim); }
.qr-cap b { color: var(--text); }
.qr-link { font-size: 13px; color: var(--accent); text-decoration: none; }
.qr-link:hover { text-decoration: underline; }

/* --------------------------------------------------------------- BÖLÜMLER */
.sec { padding: 80px 0; }
.sec-alt { background: var(--bg-2); border-block: 1px solid var(--line-soft); }

.sec-eyebrow {
  margin: 0 0 10px; font-size: 12.5px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
}
.sec-title { margin: 0 0 12px; font-size: clamp(26px, 3.4vw, 37px); letter-spacing: -.025em; font-weight: 800; }
.sec-sub { margin: 0 0 40px; font-size: 16.5px; color: var(--dim); max-width: 62ch; }

.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; transition: border-color .18s, transform .18s;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); transform: translateY(-2px); }
.card .ic {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 19px; margin-bottom: 15px;
}
.card h3 { margin: 0 0 8px; font-size: 17.5px; letter-spacing: -.01em; }
.card p { margin: 0; font-size: 14.8px; color: var(--dim); }
.card-link {
  display: inline-block; margin-top: 13px; font-size: 14px; font-weight: 600;
  color: var(--accent); text-decoration: none;
}
.card-link:hover { text-decoration: underline; }

/* --------------------------------------------------------------- QR MENÜ */
.split { display: grid; grid-template-columns: 1fr .8fr; gap: 56px; align-items: center; }

.checks { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 13px; }
.checks li { position: relative; padding-left: 30px; font-size: 15.3px; color: var(--dim); }
.checks li b { color: var(--text); }
.checks li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 800;
}

.split-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.note { margin: 16px 0 0; font-size: 12.5px; color: var(--faint); }

.phone-wrap { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.phone {
  position: relative; width: 100%; max-width: 310px; aspect-ratio: 9 / 18.5;
  background: #0a0a0e; border: 9px solid #17171d; border-radius: 40px;
  box-shadow: 0 26px 60px rgba(0, 0, 0, .4); overflow: hidden;
}
.phone-notch {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 82px; height: 18px; background: #17171d; border-radius: 12px; z-index: 2;
}
.phone iframe { width: 100%; height: 100%; border: 0; background: #fff; }

.phone-switch { display: flex; gap: 7px; }
.chip {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--dim); font: inherit; font-size: 13.5px;
  font-weight: 600; cursor: pointer; transition: all .15s;
}
.chip:hover { color: var(--text); }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }

/* --------------------------------------------------------------- ADIMLAR */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: s; }
.steps li {
  position: relative; padding: 26px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
}
.step-n {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 15px; margin-bottom: 14px;
}
.steps h3 { margin: 0 0 7px; font-size: 17px; }
.steps p { margin: 0; font-size: 14.8px; color: var(--dim); }

/* --------------------------------------------------------------- CTA */
.sec-cta { background: var(--bg-2); border-top: 1px solid var(--line-soft); }
.cta-in { text-align: center; padding: 18px 22px; }
.cta-in h2 { margin: 0 0 12px; font-size: clamp(25px, 3.4vw, 36px); letter-spacing: -.025em; font-weight: 800; }
.cta-in p { margin: 0 0 28px; color: var(--dim); font-size: 16.5px; }

/* --------------------------------------------------------------- FOOTER */
.foot { border-top: 1px solid var(--line); padding: 26px 0; background: var(--bg); }
.foot-in { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.foot-c { color: var(--faint); font-size: 13.5px; margin-left: auto; }
.foot-link { color: var(--dim); font-size: 13.5px; text-decoration: none; }
.foot-link:hover { color: var(--accent); }

/* --------------------------------------------------------------- MOBİL */
@media (max-width: 940px) {
  .hero-in { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { max-width: 340px; margin: 0 auto; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 10px 16px 16px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 12px; font-size: 15.5px; }
  .burger { display: block; margin-left: auto; order: 3; }
  .nav .btn-wa { order: 2; margin-left: auto; }
  .nav-links { margin-left: 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .sec { padding: 62px 0; }
  .hero { padding: 46px 0 60px; }
  .hero-facts { gap: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}