/* =========================================================
   Hakan ÖZER — Kişisel Web Sitesi
   Profesyonel Light Tema — Modüler CSS
   ========================================================= */

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-accent: #0ea5e9;
  --color-ink: #0f172a;
  --color-ink-soft: #475569;
  --color-ink-faint: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px -8px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 20px 50px -18px rgba(15, 23, 42, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --container: 1180px;
  --header-h: 72px;
  --transition: 220ms cubic-bezier(.4,0,.2,1);
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding: 96px 0;
  scroll-margin-top: var(--header-h);
}
.section-alt { background: var(--color-bg-alt); }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  background: var(--color-primary-light);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.section-subtitle {
  margin-top: 12px;
  color: var(--color-ink-soft);
  font-size: 1.05rem;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Skip link (a11y) */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ================= HEADER ================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  z-index: 500;
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.nav-wrap {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-badge {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 800;
  font-size: .95rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .92rem;
  color: var(--color-ink-soft);
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}
.nav-cta {
  margin-left: 8px;
  background: var(--color-primary) !important;
  color: #fff !important;
}
.nav-cta:hover { background: var(--color-primary-dark) !important; }

.nav-toggle {
  display: none;
  border: none;
  background: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  align-items: center; justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 22px; height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  position: relative;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after { position: absolute; top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

/* ================= HERO ================= */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 96px;
  background:
    radial-gradient(600px 300px at 85% 10%, rgba(37,99,235,.10), transparent 70%),
    radial-gradient(500px 260px at 10% 90%, rgba(14,165,233,.10), transparent 70%),
    var(--color-bg);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}
.hero-eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-size: .85rem;
}
.hero-name {
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 14px 0 6px;
}
.hero-name span { color: var(--color-primary); }
.hero-role-wrap {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--color-ink-soft);
  min-height: 2.4em;
  display: flex;
  align-items: center;
}
.hero-role-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--color-primary);
  margin-left: 4px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  margin-top: 22px;
  color: var(--color-ink-soft);
  font-size: 1.05rem;
  max-width: 560px;
}
.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .95rem;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.btn-outline {
  background: #fff;
  border-color: var(--color-border);
  color: var(--color-ink);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }

.hero-social {
  margin-top: 36px;
  display: flex;
  gap: 12px;
}
.social-btn {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  color: var(--color-ink-soft);
  transition: all var(--transition);
}
.social-btn:hover { color: var(--color-primary); border-color: var(--color-primary); transform: translateY(-3px); }
.social-btn svg { width: 18px; height: 18px; fill: currentColor; }

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-photo-ring {
  position: relative;
  width: min(300px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 10px;
  /*background: linear-gradient(150deg, var(--color-primary), var(--color-accent));*/
  box-shadow: var(--shadow-lg);
}
.hero-photo-ring img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
  background: #fff;
}
.hero-float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: .9rem;
  animation: floaty 4.5s ease-in-out infinite;
}
.hero-float-card.card-1 { top: 6%; left: -8%; }
.hero-float-card.card-2 { bottom: 8%; right: -6%; animation-delay: 1.2s; }
.hero-float-card.card-3 { top: 6%; right: -8%; animation-delay: 2.4s; }
.hero-float-card.card-4 { bottom: 8%; left: -6%; animation-delay: 3.6s; }
.hero-float-card .dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ================= ABOUT ================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-kicker {
  color: var(--color-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .85rem;
}
.about-title { font-size: 1.9rem; font-weight: 800; margin: 10px 0 18px; }
.about-bio { color: var(--color-ink-soft); font-size: 1.02rem; }
.about-location {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink-soft);
  font-weight: 600;
  font-size: .92rem;
}

.stats-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--color-primary);
  width: 100px;
  text-align: center;
}
.stat-label {
  margin-top: 6px;
  font-size: .82rem;
  color: var(--color-ink-soft);
  font-weight: 600;
}

/* ================= SKILLS ================= */
.core-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.core-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.core-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.core-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--color-primary-light);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.core-icon img { width: 30px; height: 30px; object-fit: contain; }
.core-name { font-size: 1.15rem; font-weight: 800; }
.core-years {
  display: inline-block;
  margin-top: 4px;
  font-size: .8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 3px 10px;
  border-radius: 999px;
}
.core-desc { margin-top: 14px; color: var(--color-ink-soft); font-size: .92rem; }
.core-level { margin-top: 18px; }

.progress-row { margin-bottom: 18px; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: .88rem;
  margin-bottom: 8px;
}
.progress-label span:last-child { color: var(--color-primary); }
.progress-track {
  height: 9px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  width: 0%;
  transition: width 1.1s cubic-bezier(.4,0,.2,1);
}

.expertise-panel {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 56px;
}
.expertise-panel-title { font-size: 1.3rem; font-weight: 800; margin-bottom: 26px; }
.expertise-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 48px;
}

.stack-block { margin-bottom: 40px; }
.stack-block:last-child { margin-bottom: 0; }
.stack-block h4 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 18px;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 12px;
}
.stack-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 8px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stack-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.stack-item img { width: 32px; height: 32px; margin: 0 auto 8px; object-fit: contain; }
.stack-item span { font-size: .74rem; font-weight: 600; color: var(--color-ink-soft); }

.certs-wrap { margin-top: 48px; }
.certs-wrap h4 { font-size: 1.05rem; font-weight: 800; margin-bottom: 18px; }
.certs-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px 8px 8px;
  box-shadow: var(--shadow-sm);
  cursor: default;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.cert-badge:hover,
.cert-badge:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  outline: none;
}
.cert-badge img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 50%;
  background: var(--color-primary-light);
  padding: 4px;
  flex-shrink: 0;
}
.cert-badge-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  white-space: nowrap;
}
.cert-badge-name { font-size: .82rem; font-weight: 700; color: var(--color-ink); }
.cert-badge-issuer { font-size: .7rem; font-weight: 600; color: var(--color-ink-faint); }

/* ================= MOBILE APPS (App Store style) ================= */
.apps-count {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: .85rem;
  margin-bottom: 8px;
}
.app-list { display: flex; flex-direction: column; gap: 18px; }
.app-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}
.app-card:hover { box-shadow: var(--shadow-md); }
.app-card-top {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 18px;
}
.app-logo {
  width: 68px; height: 68px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  background: var(--color-bg-alt);
}
.app-info { flex: 1; min-width: 0; }
.app-name { font-size: 1.15rem; font-weight: 800; }
.app-desc { margin-top: 4px; color: var(--color-ink-soft); font-size: .92rem; }
.app-platforms { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.platform-badge {
  font-size: .72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-ink-soft);
}

.app-carousel-wrap { position: relative; }
.app-carousel {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.app-carousel::-webkit-scrollbar { height: 6px; }
.app-carousel::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 999px; }
.app-shot {
  scroll-snap-align: start;
  flex: 0 0 auto;
  width: 168px;
  aspect-ratio: 9/19;
  border-radius: 18px;
  overflow: hidden;
  border: 6px solid var(--color-ink);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-md);
}
.app-shot img { width: 100%; height: 100%; object-fit: cover; }
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 38px; height: 38px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  z-index: 2;
}
.carousel-btn.prev { left: -14px; }
.carousel-btn.next { right: -14px; }
.carousel-btn svg { width: 16px; height: 16px; }

/* ================= REFERENCES ================= */
.ref-search-wrap {
  position: relative;
  max-width: 340px;
  margin: 0 auto 32px;
}
.ref-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-ink-faint);
  pointer-events: none;
}
.ref-search-input {
  width: 100%;
  padding: 13px 44px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #fff;
  font-family: inherit;
  font-size: .92rem;
  color: var(--color-ink);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.ref-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}
.ref-search-input::-webkit-search-cancel-button { display: none; }
.ref-search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: var(--color-bg-alt);
  color: var(--color-ink-soft);
  display: grid;
  place-items: center;
  font-size: .75rem;
}
.ref-search-empty {
  text-align: center;
  color: var(--color-ink-soft);
  font-weight: 600;
  margin-bottom: 24px;
}
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}
.ref-tile {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 110px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.ref-tile.is-hidden { display: none; }
.ref-tile:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.ref-tile img { max-width: 110%; max-height: 110%; width: auto; height: auto; object-fit: contain; filter: grayscale(15%); }

/* Modal / Drawer */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal-panel {
  background: #fff;
  width: 100%;
  max-width: 560px;
  max-height: 82vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalIn .3s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(24px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.modal-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--color-border);
}
.modal-header img { width: 77px; height: 77px; object-fit: contain; }
.modal-header h3 { font-size: 1.1rem; font-weight: 800; }
.modal-header a { font-size: .8rem; color: var(--color-primary); font-weight: 700; }
.modal-close {
  margin-left: auto;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  display: grid;
  place-items: center;
}
.modal-body { padding: 12px 24px 24px; overflow-y: auto; }
.edu-table { width: 100%; border-collapse: collapse; }
.edu-table thead th {
  text-align: left;
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--color-ink-faint);
  padding: 10px 8px;
  border-bottom: 1px solid var(--color-border);
}
.edu-table tbody td {
  padding: 12px 8px;
  border-bottom: 1px solid var(--color-border);
  font-size: .9rem;
}
.edu-table tbody tr:last-child td { border-bottom: none; }
.edu-table td.num { font-weight: 700; color: var(--color-primary); text-align: center; }
.edu-table td.etitle { font-weight: 600; }
/* ================= CONTACT ================= */
.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 56px;
  align-items: flex-start;
}
.contact-highlights { list-style: none; margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.contact-highlights li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--color-ink-soft);
  font-weight: 500;
}
.contact-highlights li::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-top: 8px;
  flex-shrink: 0;
}
.contact-email {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 12px 20px;
  border-radius: 999px;
}

.contact-form-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.form-row { margin-bottom: 18px; }
.form-row label {
  display: block;
  font-weight: 700;
  font-size: .85rem;
  margin-bottom: 8px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-family: inherit;
  font-size: .94rem;
  color: var(--color-ink);
  transition: border-color var(--transition), background var(--transition);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}
.form-row input.has-error,
.form-row textarea.has-error {
  border-color: #dc2626;
  background: #fef2f2;
}
.form-row input.has-error:focus,
.form-row textarea.has-error:focus {
  box-shadow: 0 0 0 4px rgba(220, 38, 38, .12);
}
.field-error {
  display: block;
  min-height: 1.1em;
  margin-top: 6px;
  font-size: .78rem;
  font-weight: 600;
  color: #dc2626;
}
.form-row textarea { resize: vertical; min-height: 120px; }
.form-two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.submit-btn {
  width: 100%;
  justify-content: center;
  border: none;
  font-size: 1rem;
}
.submit-btn[disabled] { opacity: .75; cursor: progress; }
.spinner {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  animation: spin .7s linear infinite;
  display: none;
}
.submit-btn.loading .spinner { display: inline-block; }
.submit-btn.loading .btn-text::after { content: 'Gönderiliyor...'; }
.submit-btn.loading .btn-text { font-size: 0; }
.submit-btn.loading .btn-text::after { font-size: 1rem; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  min-width: 280px;
  max-width: 360px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 16px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-left: 4px solid var(--color-primary);
  animation: toastIn .35s ease;
  font-size: .9rem;
  font-weight: 600;
}
.toast.success { border-left-color: #16a34a; }
.toast.error { border-left-color: #dc2626; }
.toast.leaving { animation: toastOut .3s ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateX(24px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(24px); } }

/* ================= FOOTER ================= */
.site-footer {
  background: var(--color-ink);
  color: #cbd5e1;
  padding: 48px 0 28px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand { font-weight: 800; color: #fff; font-size: 1.1rem; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  display: grid;
  place-items: center;
  color: #cbd5e1;
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--color-primary); color: #fff; }
.footer-social svg { width: 16px; height: 16px; fill: currentColor; }
.footer-bottom {
  margin-top: 22px;
  text-align: center;
  font-size: .85rem;
  color: #94a3b8;
}

/* ================= BACK TO TOP ================= */
.back-to-top {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 400;
  border: none;
}
.back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ================= RESPONSIVE ================= */
@media (max-width: 980px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 48px; }
  .hero-visual { order: -1; }
  .core-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-two-col { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-two { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { 
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-130%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; }
  .nav-links a { text-align: center; }
  .nav-toggle { display: flex; }
  .nav-cta { margin-left: 0; }
  .section { padding: 64px 0; }
  .core-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .expertise-panel { padding: 24px; }
  .contact-form-card { padding: 22px; }
  .app-card-top { flex-direction: column; }
  .ref-search-wrap { max-width: 100%; }
  .hero-float-card { padding: 10px 14px; font-size: .78rem; gap: 8px; }
  .hero-float-card.card-1 { left: -4%; }
  .hero-float-card.card-3 { right: -4%; }
  .hero-float-card.card-4 { left: -4%; }
}

@media (max-width: 460px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

.cert-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 12px;
}

.cert-table {
  width: 100%;
  min-width: 950px;
  border-collapse: collapse;
  background: var(--card-bg, #fff);
}

.cert-table th,
.cert-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color, #e5e7eb);
}

.cert-table th {
  font-size: 0.85rem;
  font-weight: 700;
  white-space: nowrap;
  background: var(--table-header-bg, #f8fafc);
  color: var(--text-secondary, #475569);
}

.cert-table td {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-color, #334155);
}

/* Logo */
.cert-logo-cell {
  width: 60px;
  text-align: center !important;
}

.cert-logo-cell img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

/* Sertifika adı */
.cert-name-cell {
  min-width: 180px;
}

.cert-name-cell strong {
  display: block;
  font-weight: 700;
  color: var(--heading-color, #111827);
}

/* Açıklama */
.cert-description {
  min-width: 280px;
  max-width: 400px;
}

/* Kategori */
.cert-category {
  display: inline-block;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  background: var(--badge-bg, #eef2ff);
  color: var(--badge-color, #4338ca);
}

/* Teknolojiler */
.cert-technologies {
  min-width: 200px;
}

.cert-tech {
  display: inline-block;
  margin: 2px 4px 2px 0;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  background: var(--tech-bg, #f1f5f9);
  color: var(--tech-color, #475569);
  white-space: nowrap;
}

/* Highlight */
.cert-highlight {
  min-width: 180px;
}

.cert-highlight span {
  font-weight: 600;
  color: var(--highlight-color, #2563eb);
}

/* Satır hover */
.cert-table tbody tr {
  transition: background-color 0.2s ease;
}

.cert-table tbody tr:hover {
  background: var(--row-hover-bg, #f8fafc);
}

/* Son satır */
.cert-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 768px) {

  .cert-table-wrapper {
    margin: 0 -10px;
    padding: 0 10px;
  }

  .cert-table {
    min-width: 900px;
  }

  .cert-table th,
  .cert-table td {
    padding: 12px;
  }

  .cert-table td {
    font-size: 0.85rem;
  }

  .cert-logo-cell img {
    width: 34px;
    height: 34px;
  }
}