/* ==========================================================================
   FYF Portal - Modern UI Theme
   Fikret Yüksel Eğitim Vakfı - FIRST Robotics Portal
   ========================================================================== */

:root {
  --fyf-primary: #2563eb;
  --fyf-primary-dark: #1d4ed8;
  --fyf-primary-light: #dbeafe;
  --fyf-secondary: #7c3aed;
  --fyf-accent: #06b6d4;
  --fyf-success: #10b981;
  --fyf-warning: #f59e0b;
  --fyf-danger: #ef4444;
  --fyf-dark: #0f172a;
  --fyf-gray-50: #f8fafc;
  --fyf-gray-100: #f1f5f9;
  --fyf-gray-200: #e2e8f0;
  --fyf-gray-300: #cbd5e1;
  --fyf-gray-400: #94a3b8;
  --fyf-gray-500: #64748b;
  --fyf-gray-600: #475569;
  --fyf-gray-700: #334155;
  --fyf-gray-800: #1e293b;
  --fyf-gray-900: #0f172a;
  --fyf-radius-sm: 0.5rem;
  --fyf-radius: 0.75rem;
  --fyf-radius-lg: 1rem;
  --fyf-radius-xl: 1.5rem;
  --fyf-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --fyf-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --fyf-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --fyf-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --fyf-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --fyf-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Typography --- */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--fyf-gray-50);
  color: var(--fyf-gray-800);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--fyf-gray-900);
  letter-spacing: -0.025em;
}

/* --- Navbar --- */
.fyf-navbar {
  background: linear-gradient(135deg, var(--fyf-dark) 0%, var(--fyf-gray-800) 100%);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 0.5rem 0;
  box-shadow: var(--fyf-shadow-lg);
  backdrop-filter: blur(10px);
}

.fyf-navbar .navbar-brand {
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: #fff !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.fyf-navbar .navbar-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-secondary));
  border-radius: var(--fyf-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
}

.fyf-navbar .nav-link {
  color: rgba(255,255,255,0.7) !important;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 0.85rem !important;
  border-radius: var(--fyf-radius-sm);
  transition: var(--fyf-transition);
}

.fyf-navbar .nav-link:hover,
.fyf-navbar .nav-link.active {
  color: #fff !important;
  background: rgba(255,255,255,0.1);
}

.fyf-navbar .nav-link i {
  margin-right: 0.35rem;
  font-size: 0.8rem;
  opacity: 0.8;
}

.fyf-navbar .dropdown-menu {
  background: var(--fyf-gray-800);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--fyf-radius);
  box-shadow: var(--fyf-shadow-xl);
  padding: 0.5rem;
  margin-top: 0.5rem;
}

.fyf-navbar .dropdown-item {
  color: rgba(255,255,255,0.7);
  border-radius: var(--fyf-radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  transition: var(--fyf-transition);
}

.fyf-navbar .dropdown-item:hover,
.fyf-navbar .dropdown-item.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.fyf-navbar .dropdown-divider {
  border-color: rgba(255,255,255,0.08);
}

/* --- Main Content --- */
.fyf-main {
  min-height: calc(100vh - 130px);
  padding: 2rem 0;
}

/* --- Cards --- */
.card {
  border: 1px solid var(--fyf-gray-200);
  border-radius: var(--fyf-radius);
  box-shadow: var(--fyf-shadow-sm);
  transition: var(--fyf-transition);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--fyf-shadow-md);
}

.card-header {
  background: #fff;
  border-bottom: 1px solid var(--fyf-gray-200);
  padding: 1rem 1.25rem;
  font-weight: 600;
}

.card-header.bg-primary {
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-primary-dark)) !important;
  border-bottom: none;
}

.card-header.bg-success {
  background: linear-gradient(135deg, var(--fyf-success), #059669) !important;
  border-bottom: none;
}

.card-header.bg-warning {
  background: linear-gradient(135deg, var(--fyf-warning), #d97706) !important;
  border-bottom: none;
}

.card-header.bg-danger {
  background: linear-gradient(135deg, var(--fyf-danger), #dc2626) !important;
  border-bottom: none;
}

.card-header.bg-info {
  background: linear-gradient(135deg, var(--fyf-accent), #0891b2) !important;
  border-bottom: none;
  color: #fff !important;
}

.card-header.bg-dark {
  background: linear-gradient(135deg, var(--fyf-dark), var(--fyf-gray-800)) !important;
  border-bottom: none;
}

.card-header.bg-secondary {
  background: linear-gradient(135deg, var(--fyf-gray-500), var(--fyf-gray-600)) !important;
  border-bottom: none;
}

.card-body {
  padding: 1.25rem;
}

.card-title {
  font-weight: 600;
  margin-bottom: 0;
}

/* --- Buttons --- */
.btn {
  font-weight: 600;
  border-radius: var(--fyf-radius-sm);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  transition: var(--fyf-transition);
  letter-spacing: 0.01em;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--fyf-shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--fyf-primary);
  border-color: var(--fyf-primary);
}

.btn-primary:hover {
  background: var(--fyf-primary-dark);
  border-color: var(--fyf-primary-dark);
}

.btn-outline-primary {
  color: var(--fyf-primary);
  border-color: var(--fyf-primary);
}

.btn-outline-primary:hover {
  background: var(--fyf-primary);
  border-color: var(--fyf-primary);
}

/* --- Tables --- */
.table {
  border-collapse: separate;
  border-spacing: 0;
}

.table thead th {
  background: var(--fyf-gray-50);
  color: var(--fyf-gray-600);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--fyf-gray-200);
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.table tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--fyf-gray-100);
  vertical-align: middle;
  font-size: 0.9rem;
}

.table tbody tr {
  transition: var(--fyf-transition);
}

.table tbody tr:hover {
  background: var(--fyf-gray-50);
}

/* Tüm card-body içindeki tablolar mobilde otomatik scroll */
.card-body { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* --- Forms --- */
.form-control, .form-select {
  border: 1px solid var(--fyf-gray-300);
  border-radius: var(--fyf-radius-sm);
  padding: 0.625rem 0.875rem;
  font-size: 0.9rem;
  transition: var(--fyf-transition);
  color: var(--fyf-gray-800);
}

.form-control:focus, .form-select:focus {
  border-color: var(--fyf-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

.form-label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--fyf-gray-700);
  margin-bottom: 0.375rem;
}

.input-group-text {
  border-color: var(--fyf-gray-300);
  background: var(--fyf-gray-50);
  color: var(--fyf-gray-500);
}

/* --- Badges --- */
.badge {
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.35em 0.65em;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

/* --- Alerts --- */
.alert {
  border-radius: var(--fyf-radius);
  border: none;
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.alert-success {
  background: #ecfdf5;
  color: #065f46;
  border-left: 4px solid var(--fyf-success);
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border-left: 4px solid var(--fyf-danger);
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border-left: 4px solid var(--fyf-warning);
}

.alert-info {
  background: #ecfeff;
  color: #155e75;
  border-left: 4px solid var(--fyf-accent);
}

/* --- Pagination --- */
.page-link {
  border-radius: var(--fyf-radius-sm) !important;
  margin: 0 2px;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--fyf-gray-600);
  border: 1px solid var(--fyf-gray-200);
}

.page-link:hover {
  background: var(--fyf-primary-light);
  color: var(--fyf-primary);
  border-color: var(--fyf-primary-light);
}

.page-item.active .page-link {
  background: var(--fyf-primary);
  border-color: var(--fyf-primary);
}

/* --- Quick Access Grid --- */
.quick-access-btn {
  border: 1px solid var(--fyf-gray-200);
  border-radius: var(--fyf-radius);
  padding: 1.25rem;
  text-align: center;
  color: var(--fyf-gray-700);
  background: #fff;
  transition: var(--fyf-transition);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 110px;
}

.quick-access-btn:hover {
  border-color: var(--fyf-primary);
  background: var(--fyf-primary-light);
  color: var(--fyf-primary);
  transform: translateY(-2px);
  box-shadow: var(--fyf-shadow-md);
}

.quick-access-btn i {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  opacity: 0.8;
}

.quick-access-btn span {
  font-weight: 600;
  font-size: 0.85rem;
}

/* --- Stat Cards --- */
.stat-card {
  border: 1px solid var(--fyf-gray-200);
  border-radius: var(--fyf-radius);
  padding: 1.25rem;
  background: #fff;
  transition: var(--fyf-transition);
}

.stat-card:hover {
  box-shadow: var(--fyf-shadow-md);
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--fyf-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--fyf-gray-900);
}

.stat-card .stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--fyf-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Auth Pages (Login / Register) --- */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--fyf-dark) 0%, #1a1a2e 50%, #16213e 100%);
  position: relative;
  overflow: hidden;
}

.auth-wrapper::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
  top: -200px;
  right: -200px;
}

.auth-wrapper::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124,58,237,0.1) 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
}

.auth-card {
  background: rgba(255,255,255,0.97);
  border-radius: var(--fyf-radius-xl);
  box-shadow: var(--fyf-shadow-xl);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  position: relative;
  z-index: 1;
  border: 1px solid rgba(255,255,255,0.2);
}

.auth-card .auth-logo {
  text-align: center;
  margin-bottom: 1.5rem;
}

.auth-card .auth-logo .logo-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-secondary));
  border-radius: var(--fyf-radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.auth-card .auth-logo h2 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.auth-card .auth-logo p {
  color: var(--fyf-gray-500);
  font-size: 0.9rem;
}

.auth-card .form-control {
  padding: 0.75rem 1rem;
  background: var(--fyf-gray-50);
  border: 1px solid var(--fyf-gray-200);
}

.auth-card .form-control:focus {
  background: #fff;
}

.auth-card .btn-primary {
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  width: 100%;
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-secondary));
  border: none;
  border-radius: var(--fyf-radius-sm);
}

.auth-card .btn-primary:hover {
  opacity: 0.95;
  box-shadow: 0 4px 15px rgba(37,99,235,0.4);
}

/* --- Footer --- */
.fyf-footer {
  background: var(--fyf-dark);
  color: rgba(255,255,255,0.5);
  padding: 1.5rem 0;
  font-size: 0.8rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.fyf-footer a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: var(--fyf-transition);
}

.fyf-footer a:hover {
  color: #fff;
}

/* --- Progress bars --- */
.progress {
  border-radius: 999px;
  height: 0.5rem;
  background: var(--fyf-gray-100);
}

.progress-bar {
  border-radius: 999px;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--fyf-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--fyf-gray-300);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--fyf-gray-400);
}

/* ==========================================================================
   RESPONSIVE / MOBILE-FIRST
   Gönüllüler, öğrenciler ve mentörler telefondan kullanacak.
   Tüm touch hedefleri min 44px, tablolar scroll'lanabilir, formlar tam genişlik.
   ========================================================================== */

/* --- Tablet (< 992px) --- */
@media (max-width: 991.98px) {
  .fyf-navbar .navbar-collapse {
    background: var(--fyf-gray-800);
    border-radius: var(--fyf-radius);
    padding: 1rem;
    margin-top: 0.5rem;
    max-height: 80vh;
    overflow-y: auto;
  }

  .fyf-navbar .nav-link {
    padding: 0.65rem 0.85rem !important;
  }

  .fyf-main { padding: 1.25rem 0; }

  .module-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
  }
}

/* --- Mobil (< 768px) --- */
@media (max-width: 767.98px) {
  html { font-size: 15px; }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.3rem; }
  h3 { font-size: 1.15rem; }

  .fyf-main { padding: 1rem 0; }
  .container { padding-left: 1rem; padding-right: 1rem; }

  /* Kartlar - daha kompakt */
  .card-body { padding: 1rem; }
  .card-header { padding: 0.75rem 1rem; }

  /* Auth sayfaları */
  .auth-card { margin: 0.75rem; padding: 1.5rem; }
  .auth-card .auth-logo .logo-icon { width: 48px; height: 48px; font-size: 1.25rem; }
  .auth-card .auth-logo h2 { font-size: 1.3rem; }

  /* Butonlar - dokunmaya uygun minimum 44px yükseklik */
  .btn {
    min-height: 44px;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }
  .btn-sm { min-height: 38px; }
  .btn-lg { min-height: 50px; }

  /* Formlar - daha büyük touch alanları */
  .form-control, .form-select {
    min-height: 44px;
    font-size: 16px; /* iOS zoom'u engeller */
    padding: 0.625rem 0.75rem;
  }
  .form-check-input { width: 1.25rem; height: 1.25rem; }
  .form-check-label { padding-left: 0.25rem; }

  /* Tablolar - yatay scroll */
  .table-responsive-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -1rem;
    padding: 0 1rem;
  }
  .table { min-width: 600px; }
  .table thead th { font-size: 0.7rem; padding: 0.5rem 0.65rem; }
  .table tbody td { font-size: 0.8rem; padding: 0.5rem 0.65rem; }

  /* Quick access grid - 2 sütun */
  .quick-access-btn {
    padding: 0.85rem;
    min-height: 90px;
  }
  .quick-access-btn i { font-size: 1.35rem; margin-bottom: 0.35rem; }
  .quick-access-btn span { font-size: 0.78rem; }

  /* Stat kartları */
  .stat-card { padding: 0.85rem; }
  .stat-card .stat-value { font-size: 1.35rem; }
  .stat-card .stat-icon { width: 40px; height: 40px; font-size: 1rem; }

  /* Footer */
  .fyf-footer { text-align: center; }
  .fyf-footer .d-flex { flex-direction: column; gap: 0.5rem; }

  /* Modül grid - tek sütun */
  .module-grid {
    grid-template-columns: 1fr !important;
    gap: 0.75rem;
  }
  .module-card { padding: 1rem; }

  /* Badge'ler biraz büyük */
  .badge { font-size: 0.7rem; padding: 0.3em 0.55em; }

  /* Toast - tam genişlik */
  .toast-container { left: 1rem; right: 1rem; top: 70px; }
  .toast-item { font-size: 0.8rem; }

  /* Nav dropdown */
  .fyf-navbar .dropdown-menu {
    position: static !important;
    width: 100%;
    margin-top: 0.25rem;
    box-shadow: none;
    border: 1px solid rgba(255,255,255,0.08);
  }
}

/* --- Küçük mobil (< 576px) --- */
@media (max-width: 575.98px) {
  html { font-size: 14px; }

  h1 { font-size: 1.35rem; }

  .container { padding-left: 0.75rem; padding-right: 0.75rem; }

  .card-body { padding: 0.75rem; }

  /* Action buton grupları - üst üste */
  .d-flex.gap-2, .d-flex.gap-3 { flex-direction: column; }
  .d-flex.gap-2 > *, .d-flex.gap-3 > * { width: 100%; }

  /* Register sayfası - tek sütun */
  .register-card { padding: 1.25rem; }
  .register-card .row > [class*="col-md-6"] { flex: 0 0 100%; max-width: 100%; }

  /* Mini stat kartları */
  .mini-stat { padding: 0.5rem; }
  .mini-stat .val { font-size: 1.1rem; }
  .mini-stat .lbl { font-size: 0.6rem; }
}

/* ==========================================================================
   TOUCH & ACCESSIBILITY
   ========================================================================== */

/* Tıklanabilir elemanlar için min touch hedefi (WCAG 2.5.5) */
a.nav-link, .dropdown-item, .list-group-item-action, .page-link {
  min-height: 44px;
  display: flex;
  align-items: center;
}

/* Focus göstergesi (klavye navigasyonu için) */
:focus-visible {
  outline: 2px solid var(--fyf-primary);
  outline-offset: 2px;
  border-radius: var(--fyf-radius-sm);
}

/* Safe-area insets (iPhone notch desteği) */
@supports (padding: env(safe-area-inset-bottom)) {
  .fyf-footer { padding-bottom: calc(1.5rem + env(safe-area-inset-bottom)); }
  .fyf-navbar { padding-top: env(safe-area-inset-top); }
}

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Prevent overscroll bounce on iOS */
body { overscroll-behavior-y: none; }

/* Disable hover effects on touch devices (prevents sticky hover) */
@media (hover: none) {
  .btn:hover { transform: none; box-shadow: none; }
  .card:hover { box-shadow: var(--fyf-shadow-sm); }
  .quick-access-btn:hover { transform: none; }
  .module-card:hover { transform: none; }
}

/* Selection color */
::selection { background: rgba(37,99,235,0.2); }

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* --- Toast override --- */
.toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 9999;
}

.toast-item {
  padding: 0.75rem 1.25rem;
  border-radius: var(--fyf-radius);
  margin-bottom: 0.5rem;
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: var(--fyf-shadow-lg);
  animation: toast-slide-in 0.3s ease-out;
}

@keyframes toast-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* --- Utility classes --- */
.text-gradient {
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.bg-gradient-primary {
  background: linear-gradient(135deg, var(--fyf-primary), var(--fyf-secondary));
}

.border-dashed {
  border-style: dashed !important;
}