:root{
  --primary:#5b8cff;
  --primary2:#7f5cff;
  --success:#19c37d;
  --warning:#ffb020;
  --danger:#ff5d73;
  --radius:18px;
  --container:1200px;
  --gradient-text:linear-gradient(135deg,#8ab0ff,#a890ff);
  --transition-fast:0.25s ease;
  --transition-medium:0.35s ease;
}

html{
  scroll-behavior:smooth;
}

html[data-theme="dark"]{
  --bg:#07111f;
  --bg2:#0c1728;
  --panel:#0f1d31;
  --panel2:#13233a;
  --text:#eaf2ff;
  --muted:#9eb0cc;
  --line:rgba(255,255,255,.08);
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --cardText:#eaf2ff;
  --cardMuted:#aab9d3;
  --bodyBg:
    radial-gradient(circle at top left, rgba(91,140,255,.18), transparent 30%),
    radial-gradient(circle at 90% 10%, rgba(127,92,255,.12), transparent 25%),
    linear-gradient(180deg, #06101c 0%, #091424 45%, #08121f 100%);
  --topbarBg:rgba(7,17,31,.72);
  --topbarBorder:rgba(255,255,255,.08);
  --topbarShadow:none;
  --navLink:#d8e5ff;
  --navLinkHover:#ffffff;
  --heroBadgeBg:rgba(255,255,255,.05);
  --heroBadgeBorder:rgba(255,255,255,.08);
  --heroBadgeText:#c9d7f0;
  --statBg:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  --statBorder:rgba(255,255,255,.08);
  --softCardBg:rgba(255,255,255,.04);
  --softCardBorder:rgba(255,255,255,.08);
  --featureBoxBg:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  --featureBoxBorder:rgba(255,255,255,.08);
  --aboutPanelBg:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  --aboutPanelBorder:rgba(255,255,255,.08);
  --checkItemBg:rgba(255,255,255,.04);
  --checkItemBorder:rgba(255,255,255,.06);
  --checkItemText:#dbe7ff;
  --faqBg:rgba(255,255,255,.04);
  --faqBorder:rgba(255,255,255,.08);
  --faqText:#ffffff;
  --contactCardBg:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  --contactCardBorder:rgba(255,255,255,.08);
  --inputBg:#0b1728;
  --inputBorder:rgba(255,255,255,.08);
  --inputText:#ffffff;
  --footerBorder:rgba(255,255,255,.06);
  --menuBtnBg:rgba(255,255,255,.05);
  --menuBtnBorder:rgba(255,255,255,.08);
  --menuBtnColor:#ffffff;
  --mobileMenuBg:rgba(9,20,36,.98);
  --mobileMenuBorder:rgba(255,255,255,.08);
  --btnOutlineBg:rgba(255,255,255,.04);
  --btnOutlineBorder:rgba(255,255,255,.14);
  --btnOutlineText:#ffffff;
  --themeToggleBg:rgba(255,255,255,.08);
  --themeToggleBorder:rgba(255,255,255,.10);
  --themeToggleThumbBg:linear-gradient(135deg, var(--primary), var(--primary2));
  --themeToggleIcon:#d8e5ff;
}

html[data-theme="light"]{
  --bg:#ffffff;
  --bg2:#f5f8fc;
  --panel:#0f1d31;
  --panel2:#13233a;
  --text:#162033;
  --muted:#5f6f86;
  --line:rgba(16,24,40,.08);
  --shadow:0 20px 60px rgba(16,24,40,.10);
  --cardText:#eaf2ff;
  --cardMuted:#aab9d3;
  --bodyBg:
    radial-gradient(circle at top left, rgba(91,140,255,.10), transparent 28%),
    radial-gradient(circle at 90% 10%, rgba(127,92,255,.08), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 50%, #ffffff 100%);
  --topbarBg:rgba(255,255,255,.82);
  --topbarBorder:rgba(16,24,40,.08);
  --topbarShadow:0 8px 24px rgba(16,24,40,.06);
  --navLink:#23324a;
  --navLinkHover:#000000;
  --heroBadgeBg:#f3f7fd;
  --heroBadgeBorder:rgba(16,24,40,.08);
  --heroBadgeText:#405269;
  --statBg:#ffffff;
  --statBorder:rgba(16,24,40,.08);
  --softCardBg:rgba(255,255,255,.04);
  --softCardBorder:rgba(255,255,255,.08);
  --featureBoxBg:linear-gradient(180deg, #13243b, #0f1d31);
  --featureBoxBorder:rgba(16,24,40,.06);
  --aboutPanelBg:#ffffff;
  --aboutPanelBorder:rgba(16,24,40,.08);
  --checkItemBg:#f7faff;
  --checkItemBorder:rgba(16,24,40,.06);
  --checkItemText:#23324a;
  --faqBg:#ffffff;
  --faqBorder:rgba(16,24,40,.08);
  --faqText:#142033;
  --contactCardBg:#ffffff;
  --contactCardBorder:rgba(16,24,40,.08);
  --inputBg:#f8fbff;
  --inputBorder:rgba(16,24,40,.08);
  --inputText:#142033;
  --footerBorder:rgba(16,24,40,.08);
  --menuBtnBg:#ffffff;
  --menuBtnBorder:rgba(16,24,40,.12);
  --menuBtnColor:#172235;
  --mobileMenuBg:#ffffff;
  --mobileMenuBorder:rgba(16,24,40,.08);
  --btnOutlineBg:#ffffff;
  --btnOutlineBorder:rgba(16,24,40,.12);
  --btnOutlineText:#172235;
  --themeToggleBg:#f3f7fd;
  --themeToggleBorder:rgba(16,24,40,.10);
  --themeToggleThumbBg:linear-gradient(135deg, var(--primary), var(--primary2));
  --themeToggleIcon:#42536b;
}

*{
  box-sizing:border-box;
}

body{
  margin:0;
  font-family:Arial, Helvetica, sans-serif;
  color:var(--text);
  background:var(--bodyBg);
  line-height:1.6;
  transition:
    background var(--transition-medium),
    color var(--transition-fast);
}

a{
  text-decoration:none;
  color:inherit;
  transition:color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

button,
input,
textarea,
.card,
.stat-card,
.feature-box,
.about-panel,
.about-small,
.why-card,
.faq-item,
.contact-card,
.contact-form,
.topbar,
.btn,
.hero-badge,
.check-item,
.theme-toggle,
.menu-toggle,
.info-icon{
  transition:
    background var(--transition-medium),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.container{
  width:min(var(--container), calc(100% - 32px));
  margin:0 auto;
}

.section{
  padding:90px 0;
}

.section-tight-top{
  padding-top:20px;
}

.section-title{
  max-width:650px;
  margin:0 auto 50px;
  text-align:center;
}

.section-title h2{
  margin:0 0 14px;
  font-size:clamp(30px,5vw,48px);
  line-height:1.15;
}

.section-title p{
  margin:0;
  color:var(--muted);
  font-size:16px;
}

.section-tag{
  display:inline-block;
  padding:8px 14px;
  border:1px solid rgba(91,140,255,.20);
  background:rgba(91,140,255,.08);
  color:#5b78d4;
  border-radius:999px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.4px;
  margin-bottom:18px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:52px;
  padding:0 24px;
  border-radius:14px;
  border:1px solid transparent;
  font-weight:700;
  cursor:pointer;
}

.btn-primary{
  background:linear-gradient(135deg, var(--primary), var(--primary2));
  color:#fff;
  box-shadow:0 10px 30px rgba(91,140,255,.28);
}

.btn-primary:hover{
  transform:translateY(-2px);
}

.btn-outline{
  border-color:var(--btnOutlineBorder);
  background:var(--btnOutlineBg);
  color:var(--btnOutlineText);
}

.btn-outline:hover{
  transform:translateY(-2px);
}

.btn-outline-on-dark{
  background:rgba(255,255,255,.06);
  color:#fff;
  border-color:rgba(255,255,255,.12);
}

.topbar{
  position:sticky;
  top:0;
  z-index:1000;
  backdrop-filter:blur(14px);
  background:var(--topbarBg);
  border-bottom:1px solid var(--topbarBorder);
  box-shadow:var(--topbarShadow);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:82px;
  gap:20px;
}

.logo{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:800;
  letter-spacing:.4px;
  font-size:22px;
}

.logo-img{
  height:78px;
  width:auto;
  display:block;
}

.nav-links{
  display:flex;
  align-items:center;
  gap:24px;
}

.nav-links a{
  color:var(--navLink);
  font-size:15px;
}

.nav-links a:hover{
  color:var(--navLinkHover);
}

.nav-cta{
  display:flex;
  align-items:center;
  gap:12px;
}

.theme-toggle{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0;
  width:78px;
  height:44px;
  border:none;
  background:transparent;
  cursor:pointer;
}

.theme-toggle-track{
  position:relative;
  width:78px;
  height:44px;
  border-radius:999px;
  background:var(--themeToggleBg);
  border:1px solid var(--themeToggleBorder);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 10px;
  overflow:hidden;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.02);
}

.theme-icon{
  width:18px;
  height:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--themeToggleIcon);
  z-index:2;
}

.theme-icon svg{
  width:18px;
  height:18px;
}

.theme-toggle-thumb{
  position:absolute;
  top:4px;
  left:4px;
  width:34px;
  height:34px;
  border-radius:50%;
  background:var(--themeToggleThumbBg);
  box-shadow:0 8px 22px rgba(91,140,255,.25);
  z-index:1;
  transform:translateX(0);
  transition:transform var(--transition-medium), background var(--transition-medium), box-shadow var(--transition-fast);
}

html[data-theme="light"] .theme-toggle-thumb{
  transform:translateX(34px);
}

.theme-toggle:hover .theme-toggle-thumb{
  box-shadow:0 10px 26px rgba(91,140,255,.32);
}

.menu-toggle{
  display:none;
  width:46px;
  height:46px;
  border-radius:12px;
  border:1px solid var(--menuBtnBorder);
  background:var(--menuBtnBg);
  color:var(--menuBtnColor);
  font-size:20px;
  cursor:pointer;
}

.hero{
  position:relative;
  overflow:hidden;
  padding:90px 0 70px;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:40px;
  align-items:center;
}

.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  border-radius:999px;
  background:var(--heroBadgeBg);
  border:1px solid var(--heroBadgeBorder);
  color:var(--heroBadgeText);
  font-size:14px;
  margin-bottom:20px;
}

.hero h1{
  margin:0 0 18px;
  font-size:clamp(38px, 6vw, 68px);
  line-height:1.04;
  letter-spacing:-1px;
}

.hero p{
  color:var(--muted);
  font-size:18px;
  margin:0 0 28px;
  max-width:650px;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:30px;
}

.gradient-text{
  background:var(--gradient-text);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  max-width:700px;
}

.stat-card{
  background:var(--statBg);
  border:1px solid var(--statBorder);
  border-radius:18px;
  padding:22px;
  box-shadow:var(--shadow);
}

.stat-card h3{
  margin:0 0 6px;
  font-size:28px;
}

.stat-card span{
  color:var(--muted);
  font-size:14px;
}

.hero-visual{
  position:relative;
}

.dashboard{
  position:relative;
  background:linear-gradient(180deg, #13243b, #0e1d31);
  border:1px solid rgba(255,255,255,.08);
  border-radius:26px;
  padding:22px;
  box-shadow:var(--shadow);
  overflow:hidden;
}

.dashboard::before{
  content:"";
  position:absolute;
  inset:auto -60px -60px auto;
  width:180px;
  height:180px;
  background:radial-gradient(circle, rgba(91,140,255,.25), transparent 70%);
}

.dash-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:18px;
  gap:10px;
}

.dashboard-label{
  color:var(--cardMuted);
  font-size:14px;
}

.dots{
  display:flex;
  gap:8px;
}

.dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:rgba(255,255,255,.25);
}

.dot:nth-child(1){background:#ff5f57}
.dot:nth-child(2){background:#ffbd2f}
.dot:nth-child(3){background:#28c840}

.dash-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:16px;
}

.card{
  background:var(--softCardBg);
  border:1px solid var(--softCardBorder);
  border-radius:18px;
  padding:18px;
}

.card-full{
  grid-column:1/-1;
}

.card-title{
  font-size:15px;
  font-weight:700;
  margin-bottom:14px;
  color:#dfe9ff;
}

.mini-chart{
  display:flex;
  align-items:end;
  gap:10px;
  height:150px;
}

.bar{
  flex:1;
  border-radius:10px 10px 4px 4px;
  background:linear-gradient(180deg, var(--primary), var(--primary2));
  opacity:.95;
}

.list{
  display:flex;
  flex-direction:column;
  gap:12px;
}

.list-item{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border-radius:14px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.05);
}

.list-item strong{
  color:#fff;
}

.list-item small{
  display:block;
  color:var(--cardMuted);
}

.pill{
  padding:7px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  white-space:nowrap;
}

.pill.ok{background:rgba(25,195,125,.14);color:#77e5b2}
.pill.warn{background:rgba(255,176,32,.12);color:#ffd073}
.pill.info{background:rgba(91,140,255,.14);color:#b4c8ff}

.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}

.feature-box {
  display: flex;
  flex-direction: column; /* İçerikleri alt alta dizer */
  background: var(--featureBoxBg);
  border: 1px solid var(--featureBoxBorder);
  border-radius: 22px;
  padding: 28px;
  box-shadow: var(--shadow);
  height: 100%;           /* Kutuların boyunu eşitler */
}

.feature-box:hover{
  transform:translateY(-5px);
  border-color:rgba(91,140,255,.35);
}

.feature-icon{
  width:62px;
  height:62px;
  border-radius:18px;
  display:grid;
  place-items:center;
  margin-bottom:18px;
  background:linear-gradient(135deg, rgba(91,140,255,.18), rgba(127,92,255,.18));
  border:1px solid rgba(91,140,255,.2);
  font-size:28px;
}

.feature-icon-center{
  margin:0 auto 18px;
}

.feature-box h3{
  margin:0 0 10px;
  font-size:22px;
  color:#fff;
}

.feature-box p{
  margin:0;
  color:var(--cardMuted);
  font-size:15px;
}

.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:30px;
  align-items:center;
}

.about-panel{
  background:var(--aboutPanelBg);
  border:1px solid var(--aboutPanelBorder);
  border-radius:24px;
  padding:32px;
  box-shadow:var(--shadow);
}

.about-panel h2{
  margin-top:0;
  font-size:clamp(28px,4vw,44px);
  line-height:1.15;
}

.about-panel p{
  color:var(--muted);
  margin-bottom:24px;
}

.check-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}

.check-item{
  padding:14px 16px;
  border-radius:14px;
  background:var(--checkItemBg);
  border:1px solid var(--checkItemBorder);
  font-size:15px;
  color:var(--checkItemText);
}

.check-item::before{
  content:"✓";
  color:#2aaa6a;
  margin-right:10px;
  font-weight:700;
}

.about-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}

.about-small{
  min-height:170px;
  background:linear-gradient(180deg, #122238, #0e1c2f);
  border:1px solid rgba(255,255,255,.08);
  border-radius:20px;
  padding:24px;
  box-shadow:var(--shadow);
}

.about-small h4{
  margin:0 0 10px;
  font-size:20px;
  color:#fff;
}

.about-small p{
  margin:0;
  color:var(--cardMuted);
  font-size:15px;
}

.why-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}

.why-card{
  padding:24px;
  border-radius:20px;
  background:var(--aboutPanelBg);
  border:1px solid var(--aboutPanelBorder);
  text-align:center;
  box-shadow:var(--shadow);
}

.why-card h3{
  margin:14px 0 8px;
  font-size:20px;
}

.why-card p{
  margin:0;
  color:var(--muted);
  font-size:15px;
}

.cta-wrap{
  position:relative;
  padding:42px;
  border-radius:30px;
  overflow:hidden;
  background:
    radial-gradient(circle at 10% 20%, rgba(91,140,255,.22), transparent 28%),
    radial-gradient(circle at 90% 80%, rgba(127,92,255,.18), transparent 30%),
    linear-gradient(135deg, #12233a, #0b1728);
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow);
}

.cta-wrap h2{
  margin:0 0 12px;
  font-size:clamp(30px,4vw,48px);
  color:#fff;
}

.cta-wrap p{
  margin:0 0 24px;
  color:#cad8f0;
  max-width:720px;
}

.cta-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}

.faq-list{
  max-width:900px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:14px;
}

.faq-item{
  border:1px solid var(--faqBorder);
  border-radius:18px;
  background:var(--faqBg);
  overflow:hidden;
  box-shadow:var(--shadow);
}

.faq-question{
  width:100%;
  background:none;
  border:none;
  color:var(--faqText);
  text-align:left;
  padding:22px 24px;
  font-size:18px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:space-between;
  cursor:pointer;
}

.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease, padding .3s ease, color var(--transition-fast);
  color:var(--muted);
  padding:0 24px;
}

.faq-item.active .faq-answer{
  max-height:240px;
  padding:0 24px 22px;
}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px;
}

.contact-card,
.contact-form{
  background:var(--contactCardBg);
  border:1px solid var(--contactCardBorder);
  border-radius:24px;
  padding:28px;
  box-shadow:var(--shadow);
}

.contact-title{
  margin-top:0;
  font-size:38px;
}

.contact-text{
  color:var(--muted);
  margin-bottom:28px;
}

.info-row{
  display:flex;
  gap:16px;
  align-items:flex-start;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}

.info-row:last-child{
  border-bottom:none;
}

.info-icon{
  min-width:48px;
  width:48px;
  height:48px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, rgba(91,140,255,.2), rgba(127,92,255,.2));
  font-size:20px;
}

.info-row h4{
  margin:0 0 4px;
}

.info-row p{
  margin:0;
  color:var(--muted);
}

.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}

.form-grid .full{
  grid-column:1/-1;
}

input,
textarea{
  width:100%;
  border:none;
  outline:none;
  border-radius:14px;
  background:var(--inputBg);
  border:1px solid var(--inputBorder);
  color:var(--inputText);
  padding:15px 16px;
  font-size:15px;
}

textarea{
  min-height:140px;
  resize:vertical;
}

.form-note{
  margin-top:14px;
  color:var(--muted);
  font-size:14px;
}

footer{
  padding:28px 0 36px;
  border-top:1px solid var(--footerBorder);
}

.footer-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  color:var(--muted);
  font-size:14px;
}

.footer-links{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}

.floating-demo{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:999;
  box-shadow:0 14px 40px rgba(91,140,255,.3);
}

@media (max-width: 1100px){
  .hero-grid,
  .about-grid,
  .contact-grid,
  .dash-grid{
    grid-template-columns:1fr;
  }

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

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

@media (max-width: 860px){
  .nav-links,
  .nav-cta .btn-outline{
    display:none;
  }

  .menu-toggle{
    display:inline-grid;
    place-items:center;
  }

  .nav-links.mobile-open{
    position:absolute;
    left:16px;
    right:16px;
    top:82px;
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    padding:18px;
    border-radius:18px;
    border:1px solid var(--mobileMenuBorder);
    background:var(--mobileMenuBg);
    box-shadow:var(--shadow);
  }

  .hero-stats,
  .features-grid,
  .check-list,
  .about-cards,
  .why-grid,
  .form-grid{
    grid-template-columns:1fr;
  }

  .section{
    padding:70px 0;
  }

  .cta-wrap{
    padding:28px;
  }

  .logo-img{
    height:64px;
  }

  .theme-toggle{
    order:3;
  }
}

@media (max-width: 640px){
  .nav{
    min-height:auto;
    padding:12px 0;
    flex-wrap:wrap;
  }

  .nav-cta{
    width:100%;
    justify-content:flex-end;
    flex-wrap:wrap;
  }
}

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