:root{
    --bg: #F5F9FC;
    --panel: #FFFFFF;
    --sidebar-a: #E9F2FA;
    --sidebar-b: #D3E6F4;
    --ink: #1E3A52;
    --ink-soft: #5C7C90;
    --ink-faint: #9DB7C7;
    --lavender: #6699CC;
    --lavender-deep: #276BB0;
    --mint: #8FC1E3;
    --blush: #4E8FC4;
    --peach: #BFDCF0;
    --line: #E0EDF6;
    --shadow: 0 12px 32px -16px rgba(39, 107, 176, 0.3);
    --radius: 20px;
    --ease: cubic-bezier(.65,0,.35,1);
  }

  *{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; }

  body{
    margin:0;
    font-family: 'Manrope', sans-serif;
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
  }

  h1,h2,h3{
    font-family:'Fraunces', serif;
    font-weight: 500;
    margin: 0 0 .4em 0;
    letter-spacing: -0.01em;
    color: var(--ink);
  }

  .eyebrow{
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--lavender-deep);
    margin-bottom: 0.9em;
    display: inline-block;
  }

  p{ line-height: 1.7; color: var(--ink-soft); }

  a{ color: inherit; }

  /* ---------- Layout ---------- */
  .app{
    display: flex;
    min-height: 100vh;
  }

  /* ---------- Sidebar ---------- */
  .sidebar{
    width: 280px;
    flex-shrink: 0;
    position: fixed;
    top:0; left:0; bottom:0;
    background: linear-gradient(165deg, var(--sidebar-a), var(--sidebar-b));
    padding: 44px 30px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 20;
  }

  .orb{
    position: absolute;
    border-radius: 50%;
    filter: blur(38px);
    opacity: .55;
    pointer-events: none;
    animation: drift 22s ease-in-out infinite;
  }
  .orb-1{ width: 220px; height:220px; background: var(--lavender); top: -60px; right: -70px; }
  .orb-2{ width: 180px; height:180px; background: var(--mint); bottom: 40px; left: -80px; animation-delay: -8s; }
  .orb-3{ width: 140px; height:140px; background: var(--peach); bottom: -60px; right: 20px; animation-delay: -14s; }

  @keyframes drift{
    0%,100%{ transform: translate(0,0) scale(1); }
    50%{ transform: translate(14px,-18px) scale(1.08); }
  }

  .brand{
    position: relative;
    display:flex;
    align-items:center;
    gap: 14px;
    margin-bottom: 46px;
  }

  .avatar{
    width: 52px; height:52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--lavender), var(--blush));
    display:flex; align-items:center; justify-content:center;
    font-family:'Fraunces', serif;
    font-weight: 600;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: var(--shadow);
  }

  .brand-text .name{ font-family:'Fraunces', serif; font-weight:600; font-size: 1.02rem; color: var(--ink); }
  .brand-text .role{ font-size: 0.78rem; color: var(--ink-soft); margin-top: 2px; }

  nav.tabs{ position: relative; display:flex; flex-direction:column; gap: 4px; flex:1; }

  .tab-btn{
    display:flex; align-items:center; gap: 12px;
    padding: 12px 16px;
    border-radius: 14px;
    border:none; background: transparent;
    font-family:'Manrope', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--ink-soft);
    text-align:left;
    cursor: pointer;
    transition: color .35s var(--ease), background .35s var(--ease), transform .35s var(--ease);
  }
  .tab-btn .ic{ width:18px; height:18px; flex-shrink:0; opacity:.8; }
  .tab-btn:hover{ color: var(--ink); background: rgba(255,255,255,.5); }
  .tab-btn.active{ color: var(--ink); background: var(--panel); box-shadow: var(--shadow); }

  .sidebar-footer{ position:relative; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.6); display:flex; gap:10px; }
  .social-dot{
    width: 34px; height:34px; border-radius: 50%;
    background: rgba(255,255,255,.6);
    display:flex; align-items:center; justify-content:center;
    font-size: .78rem; color: var(--ink-soft);
    transition: transform .3s var(--ease), background .3s var(--ease);
    text-decoration:none;
  }
  .social-dot:hover{ transform: translateY(-3px); background: var(--panel); }

  /* ---------- Main ---------- */
  main{
    margin-left: 280px;
    flex: 1;
    padding: 64px 72px;
    max-width: 1180px;
  }

  .section{
    display:none;
    animation: fadeIn .55s var(--ease);
  }
  .section.active{ display:block; }

  @keyframes fadeIn{
    from{ opacity:0; transform: translateY(6px); }
    to{ opacity:1; transform: translateY(0); }
  }

  /* Home */
  .home-title{ font-size: clamp(2.2rem, 4vw, 3.1rem); line-height:1.08; }
  .home-title em{ font-style: italic; color: var(--lavender-deep); }
  .home-lede{ max-width: 560px; font-size: 1.05rem; margin-bottom: 34px; }

  .cta-row{ display:flex; gap: 14px; flex-wrap:wrap; margin-bottom: 56px; }
  .btn{
    padding: 13px 26px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration:none;
    display:inline-flex; align-items:center; gap:8px;
    transition: transform .3s var(--ease), box-shadow .3s var(--ease);
    border: 1px solid transparent;
    cursor:pointer;
  }
  .btn-primary{ background: var(--ink); color:#fff; }
  .btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 14px 24px -12px rgba(30,58,82,.45); }
  .btn-ghost{ border-color: var(--line); color: var(--ink); background: var(--panel); }
  .btn-ghost:hover{ transform: translateY(-2px); box-shadow: var(--shadow); }
  .whatsapp-btn{ background: #25D366; color:#fff; }
  .whatsapp-btn:hover{ transform: translateY(-2px); box-shadow: 0 14px 24px -12px rgba(37,211,102,.5); }

.stat-row{ display:grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
  .stat-card{
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
  }
  .stat-card .num{ font-family:'Fraunces', serif; font-size: 1.7rem; color: var(--lavender-deep); }
  .stat-card .label{ font-size: 0.8rem; color: var(--ink-soft); margin-top: 4px; }

  .home-block{ margin-top: 52px; }

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

  .problem-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
  .problem-card{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 20px 22px; font-family:'Fraunces',serif; font-style: italic;
    font-size: 1rem; color: var(--ink); line-height:1.5;
    border-left: 3px solid var(--lavender-deep);
  }
  @media (max-width: 700px){ .problem-grid{ grid-template-columns: 1fr; } }
  .audience-card{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 22px; transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  }
  .audience-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow); }
  .audience-ic{ font-size: 1.5rem; margin-bottom: 10px; }
  .audience-card h3{ font-size: 1rem; margin-bottom: 6px; }
  .audience-card p{ font-size: 0.85rem; margin:0; }

  .trust-row{ display:flex; flex-direction:column; gap: 12px; }
  .trust-item{
    display:flex; align-items:flex-start; gap:12px;
    background: var(--panel); border:1px solid var(--line); border-radius: 14px;
    padding: 14px 18px; font-size: 0.9rem; font-weight: 600; color: var(--ink);
    line-height: 1.5;
  }
  .trust-ic{ font-size: 1.1rem; flex-shrink:0; }

  .service-teaser{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom: 14px; }
  .mini-link{
    display:inline-block; font-weight:700; font-size:0.9rem; color: var(--lavender-deep);
    text-decoration:none; border-bottom: 1px solid transparent; transition: border-color .3s var(--ease);
    cursor:pointer;
  }
  .mini-link:hover{ border-color: var(--lavender-deep); }

  @media (max-width: 700px){ .audience-grid{ grid-template-columns: 1fr; } }

  /* About */
  .about-grid{ display:grid; grid-template-columns: 1.3fr 1fr; gap: 46px; align-items:start; }
  .skill-cloud{ display:flex; flex-wrap:wrap; gap: 10px; margin-top: 14px; }
  .skill-pill{
    background: var(--panel); border:1px solid var(--line);
    padding: 8px 16px; border-radius: 30px;
    font-size: 0.82rem; font-weight:600;
  }
  .timeline{ margin-top: 6px; }
  .t-item{ display:flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--line); }
  .t-item:last-child{ border:none; }
  .t-dot{ width:8px; height:8px; border-radius:50%; background: var(--mint); margin-top:8px; flex-shrink:0; }
  .t-item .t-year{ font-family:'JetBrains Mono', monospace; font-size:.72rem; color: var(--ink-faint); }

  /* Certificates */
  .cert-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 20px; margin-top: 26px; }
  .cert-card{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 24px; text-align: center; overflow: visible;
    position: relative;
    transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  }
  .cert-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); z-index: 10; }
  .cert-icon{
    width: 56px; height:56px; border-radius: 50%;
    object-fit: cover; display:block; margin: 0 auto 16px;
    border: 2px solid var(--panel);
    box-shadow: 0 0 0 3px var(--line);
    cursor: zoom-in;
    transition: transform .45s var(--ease), box-shadow .45s var(--ease);
    position: relative;
    z-index: 1;
  }
  .cert-icon:hover{
    transform: scale(4.6);
    box-shadow: 0 0 0 3px var(--panel), var(--shadow);
    z-index: 5;
  }
  .cert-card h3{ font-size: 1rem; margin-bottom: 4px; }
  .cert-meta{ font-family:'JetBrains Mono', monospace; font-size: .7rem; color: var(--ink-faint); }

  /* Blog */
  .blog-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 20px; margin-top: 26px; align-items: start; }
  .blog-card{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 26px; transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  }
  .blog-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); }
  .blog-date{
    font-family:'JetBrains Mono', monospace; font-size: .7rem; letter-spacing:.08em;
    text-transform: uppercase; color: var(--lavender-deep);
  }
  .blog-card h3{ font-size: 1.1rem; margin: 10px 0 10px; }
  .blog-card p{ font-size: 0.88rem; margin:0; }

  /* Hizmetlerimiz */
  .service-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 26px; }
  .service-card{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 24px 26px; transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  }
  .service-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow); }
  .service-card h3{ font-size: 1rem; margin-bottom: 10px; line-height: 1.35; }
  .service-card .mini-link{ display:inline-block; margin-top: 12px; }
  .service-card p{
    font-size: 0.86rem; margin: 0;
    color: var(--ink-faint);
    font-style: italic;
  }
  @media (max-width: 700px){ .service-grid{ grid-template-columns: 1fr; } }

  /* FAQ */
  .faq-item{ border-bottom: 1px solid var(--line); }
  .faq-q{
    width:100%; text-align:left; background:none; border:none; cursor:pointer;
    padding: 22px 0; display:flex; justify-content:space-between; align-items:center;
    font-family:'Fraunces', serif; font-size: 1.05rem; color: var(--ink);
  }
  .faq-q .plus{ transition: transform .4s var(--ease); color: var(--lavender-deep); font-size:1.3rem; }
  .faq-item.open .plus{ transform: rotate(45deg); }
  .faq-a{ max-height:0; overflow:hidden; transition: max-height .5s var(--ease), opacity .4s var(--ease); opacity:0; }
  .faq-item.open .faq-a{ max-height: 320px; opacity:1; padding-bottom: 22px; }

  /* Contact */
  .contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 40px; }
  .field{ margin-bottom: 18px; }
  .field label{ display:block; font-size:.78rem; font-weight:700; margin-bottom:8px; color: var(--ink-soft); }
  .field input, .field textarea{
    width:100%; border: 1px solid var(--line); border-radius: 14px;
    padding: 13px 16px; font-family:'Manrope',sans-serif; font-size:.92rem;
    background: var(--panel); color: var(--ink);
    transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
  }
  .field input:focus, .field textarea:focus{
    outline:none; border-color: var(--lavender-deep);
    box-shadow: 0 0 0 4px rgba(39,107,176,.18);
  }
  .contact-card{ background: var(--panel); border:1px solid var(--line); border-radius: var(--radius); padding: 28px; }
  .contact-line{ display:flex; gap:12px; align-items:center; padding: 12px 0; border-bottom: 1px dashed var(--line); font-size:.9rem; }
  .contact-line:last-child{ border:none; }

  /* Randevu Al */
  .booking-box{
    background: var(--panel); border:1px solid var(--line); border-radius: var(--radius);
    padding: 30px; max-width: 640px; margin-top: 24px;
  }
  .day-picker, .time-picker{ display:flex; flex-wrap:wrap; gap:10px; }
  .pill-btn{
    border:1px solid var(--line); background: var(--bg); border-radius:14px;
    padding: 10px 16px; font-family:'Manrope',sans-serif; font-weight:600; font-size:.85rem;
    cursor:pointer; color: var(--ink-soft); transition: all .3s var(--ease);
    display:flex; flex-direction:column; align-items:center; gap:2px; line-height:1.2;
  }
  .pill-btn .d-name{ font-size:.65rem; text-transform:uppercase; letter-spacing:.05em; }
  .pill-btn .d-num{ font-family:'Fraunces',serif; font-size:1.05rem; color: var(--ink); }
  .pill-btn:hover:not(:disabled){ border-color: var(--lavender-deep); }
  .pill-btn.selected{ background: var(--lavender-deep); border-color: var(--lavender-deep); color:#fff; }
  .pill-btn.selected .d-num{ color:#fff; }
  .pill-btn:disabled{ opacity:.35; cursor:not-allowed; }
  .time-picker .pill-btn{ flex-direction:row; padding:10px 16px; }

  /* Focus visibility */
  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
    outline: 2px solid var(--lavender-deep); outline-offset: 2px;
  }

  /* ---------- Responsive: sidebar stays fixed on the left, nav always stacked ---------- */
  @media (max-width: 900px){
    .sidebar{ width: 220px; padding: 32px 20px; }
    .brand{ margin-bottom: 34px; }
    main{ margin-left: 220px; padding: 40px 28px; }
    .about-grid, .contact-grid{ grid-template-columns: 1fr; }
    .stat-row{ grid-template-columns: 1fr 1fr; }
  }

  @media (max-width: 620px){
    .sidebar{ width: 84px; padding: 24px 12px; align-items:center; }
    .brand{ flex-direction: column; gap: 8px; }
    .brand-text{ display:none; }
    .tab-btn{ justify-content:center; padding: 12px; }
    .tab-btn span.label{ display:none; }
    .sidebar-footer{ flex-direction:column; }
    main{ margin-left: 84px; padding: 32px 16px; }
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  }

/* Site-wide floating WhatsApp button */
.float-whatsapp{
  position: fixed;
  bottom: 26px;
  right: 26px;
  width: 58px; height: 58px;
  background: #25D366;
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px -8px rgba(37,211,102,.6);
  z-index: 100;
  transition: transform .3s cubic-bezier(.65,0,.35,1), box-shadow .3s cubic-bezier(.65,0,.35,1);
  animation: floatPulse 2.6s ease-in-out infinite;
}
.float-whatsapp:hover{ transform: scale(1.08); box-shadow: 0 14px 30px -8px rgba(37,211,102,.7); }

@keyframes floatPulse{
  0%, 100% { box-shadow: 0 10px 24px -8px rgba(37,211,102,.6); }
  50% { box-shadow: 0 10px 24px -8px rgba(37,211,102,.6), 0 0 0 8px rgba(37,211,102,.15); }
}

@media (max-width: 620px){
  .float-whatsapp{ width: 52px; height: 52px; bottom: 72px; right: 18px; }
}

@media (prefers-reduced-motion: reduce){
  .float-whatsapp{ animation: none; }
}

/* ---------- Site footer / architecture ---------- */
.site-footer{
  margin-left:280px; max-width:1180px; padding:28px 72px 36px;
  border-top:1px solid var(--line); color:var(--ink-soft); font-size:.82rem;
}
.site-footer nav{display:flex;flex-wrap:wrap;gap:10px 18px;margin:12px 0;}
.site-footer a{color:var(--ink-soft);text-decoration:none;}
.site-footer a:hover{color:var(--lavender-deep);}
.site-footer small{color:var(--ink-faint);}
@media (max-width:900px){.site-footer{margin-left:220px;padding:24px 28px;}}
@media (max-width:620px){.site-footer{margin-left:84px;padding:22px 16px;}}

/* ---------- Engagement + performance ---------- */
.hero-quick{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0 0 44px;}
.hero-quick a{display:flex;flex-direction:column;gap:5px;text-decoration:none;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px 17px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);}
.hero-quick a:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--lavender);}
.hero-quick strong{font-size:.9rem;color:var(--ink);}
.hero-quick span{font-size:.76rem;line-height:1.45;color:var(--ink-soft);}
.quick-icon{font-size:1.15rem;line-height:1;}
.reading-hub{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;margin-top:24px;}
.reading-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;text-decoration:none;transition:transform .25s var(--ease),box-shadow .25s var(--ease);}
.reading-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.reading-card .reading-meta{font-size:.7rem;color:var(--lavender-deep);font-weight:700;letter-spacing:.06em;text-transform:uppercase;}
.reading-card h3{font-size:1.05rem;margin:8px 0 6px;}
.reading-card p{font-size:.82rem;margin:0;}
.engagement-note{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;margin-top:18px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,var(--panel),var(--sidebar-a));}
.engagement-note p{margin:0;font-size:.84rem;}
@media(max-width:700px){.hero-quick{grid-template-columns:1fr;}.reading-hub{grid-template-columns:1fr;}.engagement-note{align-items:flex-start;flex-direction:column;}}
@media(max-width:620px){
  .sidebar{width:100%;height:66px;top:auto;right:0;bottom:0;left:0;padding:6px 8px;display:block;overflow-x:auto;overflow-y:hidden;box-shadow:0 -8px 25px rgba(30,58,82,.12);background:rgba(233,242,250,.96);backdrop-filter:blur(14px);}
  .orb,.brand,.sidebar-footer{display:none;}
  nav.tabs{display:flex;flex-direction:row;gap:2px;min-width:max-content;height:54px;align-items:stretch;}
  .tab-btn{width:58px;height:54px;flex:0 0 58px;justify-content:center;padding:8px;border-radius:12px;}
  .tab-btn .ic{width:20px;height:20px;}
  main{margin-left:0;max-width:none;padding:28px 16px 92px;}
  .site-footer{margin-left:0;max-width:none;padding:22px 16px 92px;}
  .float-whatsapp{bottom:80px;}
}