/* =============================================
   YAZAD - Yapay Zeka Arastirmalari ve Stratejik Teknolojiler Dernegi
   .NET Framework 4.8 MVC 5 - Site Stylesheet
   Midnight Blue Theme
   ============================================= */

/* ---- Design Tokens ---- */
:root {
  --midnight: #0a192f;
  --deep-navy: #112240;
  --cyber-blue: #64ffda;
  --cyber-blue-bright: #00d4ff;
  --slate-gray: #8892b0;
  --light-slate: #ccd6f6;
  --white: #ffffff;
}

/* ---- Base ---- */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--midnight);
  color: var(--slate-gray);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: rgba(100, 255, 218, 0.2);
  color: var(--light-slate);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--light-slate);
  line-height: 1.2;
}

a { color: var(--cyber-blue); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--cyber-blue-bright); }

/* ---- Section Spacing ---- */
.yazad-section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}

/* ---- Navbar ---- */
.yazad-navbar {
  background: transparent;
  transition: all 0.5s ease;
  padding: 0.75rem 0;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
}

.yazad-navbar.scrolled {
  background: rgba(17, 34, 64, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(100, 255, 218, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.navbar-brand-yazad {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--light-slate);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar-brand-yazad i { color: var(--cyber-blue); font-size: 1.5rem; }

.nav-link-yazad {
  color: var(--slate-gray) !important;
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.5rem 0 !important;
  margin: 0 1rem;
  position: relative;
  transition: color 0.3s ease;
  text-decoration: none !important;
}

.nav-link-yazad:hover,
.nav-link-yazad.active {
  color: var(--cyber-blue) !important;
}

.nav-link-yazad::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyber-blue);
  border-radius: 1px;
  transition: width 0.3s ease;
}

.nav-link-yazad:hover::after,
.nav-link-yazad.active::after {
  width: 100%;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--slate-gray);
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  transition: color 0.2s ease;
}

.lang-btn:hover, .lang-btn.active {
  color: var(--cyber-blue);
}

/* ---- Hero ---- */
.hero-headline {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(2rem, 5vw, 4.5rem);
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  font-size: 1.125rem;
  color: var(--slate-gray);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyber-blue);
  margin-bottom: 1.5rem;
  display: block;
}

/* ---- Buttons ---- */
.btn-yazad-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2.5rem;
  background: var(--cyber-blue);
  color: var(--midnight);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-yazad-primary:hover {
  background: var(--cyber-blue-bright);
  color: var(--midnight);
  transform: scale(1.02);
  box-shadow: 0 4px 20px rgba(100, 255, 218, 0.3);
}

.btn-yazad-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2.5rem;
  background: transparent;
  color: var(--cyber-blue);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--cyber-blue);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-yazad-secondary:hover {
  background: var(--cyber-blue);
  color: var(--midnight);
}

/* ---- Cards ---- */
.yazad-card {
  background: var(--deep-navy);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.yazad-card:hover {
  box-shadow: 0 0 0 1px rgba(100, 255, 218, 0.3);
  transform: translateY(-4px);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--cyber-blue);
  margin-bottom: 1rem;
  display: block;
}

.card-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.25rem;
  color: var(--light-slate);
  margin-bottom: 0.75rem;
}

.card-text {
  font-size: 0.9375rem;
  color: var(--slate-gray);
  line-height: 1.7;
}

/* ---- Board Card ---- */
.board-card {
  background: var(--deep-navy);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
}

.board-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
}

.board-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: all 0.5s ease;
}

.board-card:hover .board-card-img img {
  filter: grayscale(0%);
  transform: scale(1.05);
}

.board-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 25, 47, 0.7);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 1.5rem;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.board-card:hover .board-card-overlay {
  opacity: 1;
}

.board-card-info {
  padding: 1.25rem;
}

.board-card-info h4 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.1rem;
  color: var(--light-slate);
  margin-bottom: 0.25rem;
}

.board-card-info p {
  font-size: 0.75rem;
  color: var(--slate-gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
}

/* ---- Section Headers ---- */
.section-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyber-blue);
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--light-slate);
  margin-bottom: 1rem;
}

.section-divider {
  width: 48px;
  height: 2px;
  background: var(--cyber-blue);
  border-radius: 1px;
}

/* ---- Floating Labels ---- */
.yazad-floating-label { position: relative; }

.yazad-floating-label .form-control {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(136, 146, 176, 0.4);
  border-radius: 0;
  color: var(--light-slate);
  padding: 1rem 0;
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.yazad-floating-label .form-control:focus {
  background: transparent;
  border-color: var(--cyber-blue);
  box-shadow: none;
  color: var(--light-slate);
}

.yazad-floating-label .form-control::placeholder { color: transparent; }

.yazad-floating-label label {
  position: absolute;
  top: 1rem;
  left: 0;
  color: var(--slate-gray);
  font-size: 1rem;
  transition: all 0.2s ease;
  pointer-events: none;
}

.yazad-floating-label .form-control:focus ~ label,
.yazad-floating-label .form-control:not(:placeholder-shown) ~ label {
  top: -0.75rem;
  font-size: 0.75rem;
  color: var(--cyber-blue);
}

/* ---- Checkbox ---- */
.yazad-checkbox {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(136, 146, 176, 0.4);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
  flex-shrink: 0;
  margin-top: 2px;
}

.yazad-checkbox:checked {
  background: var(--cyber-blue);
  border-color: var(--cyber-blue);
}

.yazad-checkbox:checked::after {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 12px;
  color: var(--midnight);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ---- SweetAlert2 Custom ---- */
.swal2-popup.yazad-swal {
  background: var(--deep-navy) !important;
  border-radius: 16px !important;
  border: 1px solid rgba(100, 255, 218, 0.15) !important;
  color: var(--light-slate) !important;
}

.swal2-popup.yazad-swal .swal2-title {
  font-family: 'Playfair Display', Georgia, serif !important;
  color: var(--light-slate) !important;
}

.swal2-popup.yazad-swal .swal2-html-container {
  font-family: 'Inter', sans-serif !important;
  color: var(--slate-gray) !important;
}

.swal2-popup.yazad-swal .swal2-confirm {
  background: var(--cyber-blue) !important;
  color: var(--midnight) !important;
  border-radius: 8px !important;
  font-family: 'Inter', sans-serif !important;
  font-weight: 600 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  font-size: 0.875rem !important;
}

.swal2-popup.yazad-swal .swal2-icon.swal2-success {
  border-color: var(--cyber-blue) !important;
  color: var(--cyber-blue) !important;
}

/* ---- Scroll Indicator ---- */
.scroll-indicator {
  width: 1px;
  height: 40px;
  background: var(--cyber-blue);
  opacity: 0.5;
  animation: pulseLine 2s ease-in-out infinite;
}

@keyframes pulseLine {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; }
}

/* ---- Float Animation ---- */
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: floatY 4s ease-in-out infinite;
}

/* ---- Footer ---- */
.social-link {
  color: #8892b0;
  font-size: 1.25rem;
  margin-right: 1rem;
  transition: color 0.3s ease;
  text-decoration: none;
}

.social-link:hover { color: #64ffda; }

/* ---- Admin Table ---- */
.text-slate { color: #8892b0 !important; }

/* ---- Accordion ---- */
.accordion-button:not(.collapsed) { background: transparent !important; box-shadow: none !important; }
.accordion-button:focus { box-shadow: none !important; border-color: transparent !important; }
.accordion-button::after { filter: invert(1) brightness(0.7); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .hero-headline { font-size: clamp(1.75rem, 8vw, 3rem); }
  .yazad-card { padding: 1.5rem; }
  .board-card-img { aspect-ratio: 1; }
  .yazad-section { padding: 3rem 0; }
}

@media (min-width: 992px) {
  .yazad-section { padding: 7rem 0; }
}