/* ==========================================================================
   Applixus — Mobil & Web Çözümleri
   Ortak stil dosyası (index.html + apps.html)
   Palet: koyu indigo zemin + mor/mavi gradient vurgu (screenshot sadakati)
   ========================================================================== */

/* ---------- Reset & Temel ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Zemin tonları (koyu indigo/navy) */
  --bg-900: #0b1020;
  --bg-800: #11162e;
  --bg-700: #161b38;
  --bg-600: #1e1b4b;
  --bg-500: #241a52;
  --surface: #171c36;
  --surface-2: #1d2342;
  --surface-3: #232a4d;

  /* Marka gradient renkleri */
  --violet: #8b5cf6;
  --indigo: #6366f1;
  --blue: #3b82f6;
  --purple: #a855f7;
  --cyan: #22d3ee;

  /* Metin */
  --text: #e7e9f5;
  --text-soft: #b9bfe0;
  --text-mute: #8a91b8;
  --heading: #ffffff;

  /* Vurgu / etkileşim */
  --accent: #8b5cf6;
  --accent-2: #6366f1;
  --accent-grad: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #3b82f6 100%);
  --accent-grad-soft: linear-gradient(135deg, rgba(168,85,247,.16), rgba(59,130,246,.16));

  /* Çizgiler */
  --border: rgba(255,255,255,.08);
  --border-strong: rgba(255,255,255,.16);
  --ring: rgba(139,92,246,.55);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-sm: 0 4px 16px rgba(0,0,0,.28);
  --shadow: 0 18px 48px rgba(5,8,24,.5);
  --shadow-lg: 0 30px 80px rgba(5,8,24,.55);
  --glow: 0 0 0 1px rgba(139,92,246,.25), 0 16px 40px rgba(99,102,241,.22);

  --maxw: 1200px;
  --header-h: 72px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  font-family: var(--font);
  background: var(--bg-900);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Dekoratif arka plan ışıması */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -8%, rgba(139,92,246,.18), transparent 60%),
    radial-gradient(800px 600px at 92% 4%, rgba(59,130,246,.16), transparent 60%),
    radial-gradient(700px 700px at 50% 120%, rgba(168,85,247,.12), transparent 60%),
    linear-gradient(180deg, #0b1020 0%, #0d1230 40%, #0b1020 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}

img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- Tipografi ölçeği ---------- */
h1, h2, h3, h4 { color: var(--heading); line-height: 1.15; letter-spacing: -0.02em; font-weight: 800; }
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); font-weight: 700; }
p { color: var(--text-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--violet);
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--accent-grad);
  border-radius: 2px;
}

.text-grad {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Düzen ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}
section { padding: clamp(64px, 9vw, 112px) 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head p { margin-top: 16px; font-size: 1.05rem; }

/* ---------- Butonlar ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: .98rem;
  padding: 14px 26px;
  border-radius: 999px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  min-height: 48px;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 10px 30px rgba(99,102,241,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(99,102,241,.5); }
.btn-ghost {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border-strong);
  color: var(--text);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255,255,255,.1); border-color: var(--violet); transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: .88rem; min-height: 40px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(11,16,32,.7);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0,0,0,.3);
  background: rgba(11,16,32,.85);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 38px; width: auto; }
.main-nav ul { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-soft);
  transition: color .18s ease, background .18s ease;
}
.main-nav a:hover { color: #fff; background: rgba(255,255,255,.06); }
.header-cta { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: rgba(255,255,255,.04);
  align-items: center;
  justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle span::before { transform: translateY(-6px); }
.nav-toggle span::after { transform: translateY(6px); position: relative; top: -2px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: rotate(-45deg); top: 0; }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(72px, 10vw, 120px); padding-bottom: clamp(64px, 9vw, 110px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { margin: 22px 0 18px; }
.hero h1 .text-grad { display: inline; }
.hero .lead { font-size: 1.12rem; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 40px;
}
.stat-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: 16px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
}
.stat-pill .num {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.stat-pill .lbl { font-size: .82rem; color: var(--text-mute); line-height: 1.2; }
.hero-visual { position: relative; }
.hero-visual img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-strong);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.about-visual img { border-radius: var(--radius-xl); border: 1px solid var(--border-strong); box-shadow: var(--shadow); }
.about-body p { margin-bottom: 16px; }
.about-body .btn { margin-top: 8px; }

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.feature-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent-grad);
  opacity: 0; transition: opacity .2s ease;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.feature-card:hover::before { opacity: 1; }
.feature-card .idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  border-radius: 12px;
  font-weight: 800;
  color: #fff;
  background: var(--accent-grad);
  margin-bottom: 18px;
  font-size: 1.05rem;
}
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: .96rem; }

/* ---------- Values ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 20px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border);
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.value-item:hover { border-color: var(--violet); background: rgba(139,92,246,.06); transform: translateY(-3px); }
.value-item .ico {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent-grad-soft);
  border: 1px solid var(--border-strong);
  color: var(--violet);
  font-size: 1.2rem;
}
.value-item h3 { font-size: 1.02rem; margin-bottom: 4px; }
.value-item p { font-size: .88rem; color: var(--text-mute); }

/* ---------- Principles ---------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.principle-card {
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.principle-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.principle-card .ico {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--accent-grad);
  color: #fff;
  font-size: 1.4rem;
  margin-bottom: 18px;
  box-shadow: 0 8px 22px rgba(99,102,241,.4);
}
.principle-card h3 { margin-bottom: 10px; }
.principle-card p { font-size: .95rem; }

/* ---------- References ---------- */
.refs-band { text-align: center; }
.refs-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 40px;
}
.ref-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  min-width: 260px;
  transition: border-color .2s ease, transform .2s ease;
}
.ref-card:hover { border-color: var(--violet); transform: translateY(-3px); }
.ref-card img { width: 56px; height: 56px; border-radius: 12px; background: rgba(255,255,255,.06); padding: 6px; }
.ref-card .meta { text-align: left; }
.ref-card .meta strong { display: block; color: #fff; font-size: 1.02rem; }
.ref-card .meta span { font-size: .82rem; color: var(--text-mute); }
.refs-count {
  margin-top: 30px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent-grad-soft);
  border: 1px solid var(--border-strong);
  font-weight: 700;
  color: #fff;
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin-inline: auto; display: grid; gap: 14px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  overflow: hidden;
  transition: border-color .2s ease, background .2s ease;
}
.faq-item.open { border-color: var(--violet); background: rgba(139,92,246,.05); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 1.04rem;
  font-weight: 700;
  color: #fff;
  min-height: 56px;
}
.faq-q .ico {
  flex: 0 0 auto;
  width: 28px; height: 28px;
  border-radius: 8px;
  display: grid; place-items: center;
  background: var(--accent-grad-soft);
  border: 1px solid var(--border-strong);
  color: var(--violet);
  font-size: 1.1rem;
  transition: transform .25s ease;
}
.faq-item.open .faq-q .ico { transform: rotate(45deg); background: var(--accent-grad); color: #fff; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner { padding: 0 24px 22px; color: var(--text-soft); }
.faq-a-inner a { color: var(--violet); font-weight: 600; }
.faq-a-inner .contact-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.faq-a-inner .contact-row .btn { margin: 0; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 40px;
  padding: 64px 0 32px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(11,16,32,.6));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}
.footer-brand img { height: 40px; margin-bottom: 16px; }
.footer-brand p { font-size: .92rem; max-width: 300px; }
.footer-col h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; color: var(--text-mute); margin-bottom: 16px; font-weight: 700; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { color: var(--text-soft); font-size: .94rem; transition: color .18s ease; }
.footer-col a:hover { color: var(--violet); }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; color: var(--text-soft); font-size: .92rem; }
.footer-contact .ico { color: var(--violet); flex: 0 0 auto; margin-top: 3px; }
.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-mute);
  font-size: .86rem;
}

/* ---------- Apps page ---------- */
.apps-hero { padding-top: clamp(64px, 8vw, 96px); padding-bottom: clamp(40px, 5vw, 64px); text-align: center; }
.apps-hero .lead { max-width: 640px; margin-inline: auto; margin-top: 16px; }
.apps-hero .eyebrow { justify-content: center; }
.app-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.app-section-head h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
.app-section-head .count { font-size: .9rem; color: var(--text-mute); }

.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.app-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
  position: relative;
  overflow: hidden;
}
.app-card::after {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(139,92,246,.18), transparent 70%);
  opacity: 0; transition: opacity .25s ease;
}
.app-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.app-card:hover::after { opacity: 1; }
.app-card .app-top { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.app-card .app-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border-strong);
  padding: 8px;
  flex: 0 0 auto;
}
.app-card .app-top h3 { margin: 0; }
.app-card .app-desc { font-size: .94rem; margin-bottom: 18px; }
.app-card .badge-web {
  position: absolute;
  top: 20px; right: 20px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--accent-grad);
  color: #fff;
}
.app-card h3 { font-size: 1.12rem; }
.app-card .sub { font-size: .8rem; color: var(--text-mute); display: block; margin-top: 2px; }

.app-card h4 {
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-mute);
  margin: 16px 0 10px;
  font-weight: 700;
}
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: .78rem;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(139,92,246,.12);
  border: 1px solid rgba(139,92,246,.28);
  color: #d6c9ff;
}
.features-list { display: grid; gap: 7px; }
.features-list li {
  position: relative;
  padding-left: 22px;
  font-size: .9rem;
  color: var(--text-soft);
}
.features-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 12px;
  border-radius: 4px;
  background: var(--accent-grad);
}
.app-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.app-links .btn { flex: 1 1 auto; min-width: 120px; }

.apps-cta-band {
  margin-top: 56px;
  text-align: center;
  padding: 48px 28px;
  border-radius: var(--radius-xl);
  background: var(--accent-grad-soft);
  border: 1px solid var(--border-strong);
}
.apps-cta-band h3 { font-size: 1.4rem; margin-bottom: 10px; }
.apps-cta-band p { margin-bottom: 22px; }

/* ---------- Yardımcılar ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; border-radius: 6px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; max-width: 520px; margin-inline: auto; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-visual { max-width: 520px; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .principles-grid { grid-template-columns: repeat(2, 1fr); }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(11,16,32,.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    transform: translateY(-130%);
    transition: transform .3s ease;
    box-shadow: var(--shadow);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav a { padding: 14px 16px; font-size: 1rem; border-radius: 12px; }
  .nav-toggle { display: inline-flex; }
  .header-cta .btn-ghost { display: none; }

  .cards-3 { grid-template-columns: 1fr; }
  .principles-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 10px; }
  .stat-pill { flex: 1 1 140px; }
  .refs-logos { gap: 14px; }
  .ref-card { min-width: 100%; }
}

@media (max-width: 375px) {
  .container { padding-inline: 18px; }
  .hero-actions .btn { width: 100%; }
  .stat-pill { flex: 1 1 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

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