/* ============================================
   MODERN PROFESSIONAL DESIGN SYSTEM
   ============================================ */

:root {
  /* Primary Colors - Sophisticated Blue-Gray Palette */
  --primary-50: #f8fafc;
  --primary-100: #f1f5f9;
  --primary-200: #e2e8f0;
  --primary-300: #cbd5e1;
  --primary-400: #94a3b8;
  --primary-500: #64748b;
  --primary-600: #475569;
  --primary-700: #334155;
  --primary-800: #1e293b;
  --primary-900: #0f172a;
  
  /* Accent Colors - Subtle Indigo */
  --accent-500: #6366f1;
  --accent-600: #4f46e5;
  --accent-50: #eef2ff;
  
  /* Semantic Colors */
  --bg: var(--primary-50);
  --card: #ffffff;
  --text: var(--primary-900);
  --text-secondary: var(--primary-600);
  --text-muted: var(--primary-400);
  --border: var(--primary-200);
  --border-light: var(--primary-100);
  
  /* Shadows - Layered Depth */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   BASE STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);

  background: url("/logolar/bg2.png") no-repeat center center fixed;
  background-size: cover;

  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}


/* ============================================
   NOISE LAYER (aynı kalabilir)
   ============================================ */

.bg-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  z-index: 1;
}
/* ============================================
   MAIN CONTAINER
   ============================================ */

main.container {
  position: relative;
  z-index: 1;
}

/* ============================================
   APP CARD - Glassmorphism Effect (Güncellendi)
   ============================================ */

.app-card {
  background: rgba(255, 255, 255, 0.75); /* 0.95'ten 0.75'e düşürüldü */
  backdrop-filter: blur(12px); /* 20px'den 12px'e optimize edildi */
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.4); /* Daha şeffaf border */
  border-radius: var(--radius-2xl);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(255, 255, 255, 0.1); /* Daha yumuşak gölge */
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), background var(--transition-base);
}

.app-card:hover {
  background: rgba(255, 255, 255, 0.85); /* Hover'da biraz daha opak */
  box-shadow: 
    0 35px 60px -15px rgba(0, 0, 0, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.15);
}

/* ============================================
   APP HEADER
   ============================================ */

.app-head {
  padding: var(--space-6) var(--space-8);
  background: linear-gradient(180deg, rgba(255,255,255,0.28) 0%, rgba(250,250,250,0.24) 100%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(15,23,42,0.06);
  position: relative;
}

.app-head::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* Header Typography */
.app-head h1,
.app-head .h4 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-800);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.app-head p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-1);
  font-weight: 400;
}

.app-head h1,
.app-head .h4,
.app-head p {
  text-shadow: 0 1px 3px rgba(15,23,42,0.22);
}

/* Keep text readable over the background */
body,
.app-head h1,
.app-head .h4,
.form-label {
  text-shadow: 0 1px 2px rgba(15, 23, 42, 0.18);
}

/* ============================================
   FORM STYLES
   ============================================ */

.app-card .p-3,
.app-card .p-md-4 {
  padding: var(--space-8);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-700);
  margin-bottom: var(--space-2);
  display: block;
}

.form-label .hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text);
  background-color: rgba(255,255,255,0.88);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.form-control:hover {
  border-color: var(--primary-300);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-500);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  background-color: #fff;
}

.form-control::placeholder {
  color: var(--primary-400);
  font-weight: 400;
}

.form-control:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

/* Validation States */
.invalid-feedback {
  font-size: 0.8125rem;
  color: #dc2626;
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 500;
}

/* ============================================
   SIGNATURE AREA
   ============================================ */

.signature-wrap {
  position: relative;
  width: 100%;
  height: 240px;
  background: linear-gradient(135deg, #fafafa 0%, #f8fafc 100%);
  border: 2px dashed var(--primary-300);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.signature-wrap:hover {
  border-color: var(--accent-500);
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  box-shadow: inset 0 2px 8px rgba(99, 102, 241, 0.05);
}

.signature-wrap:focus-within {
  border-style: solid;
  border-color: var(--accent-500);
  box-shadow: var(--shadow-glow), inset 0 2px 8px rgba(99, 102, 241, 0.05);
}

.signature-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.signature-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--primary-400);
  font-size: 0.875rem;
  font-weight: 500;
  user-select: none;
  pointer-events: none;
  transition: opacity var(--transition-base);
  background: rgba(248, 250, 252, 0.8);
  backdrop-filter: blur(2px);
}

.signature-overlay i {
  font-size: 2rem;
  color: var(--primary-300);
  transition: transform var(--transition-slow);
}

.signature-wrap:hover .signature-overlay i {
  transform: translateY(-2px);
  color: var(--accent-500);
}

/* Hide overlay when canvas has content */
.signature-wrap.has-content .signature-overlay {
  opacity: 0;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 1.5px solid transparent;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

/* Primary Button (Submit) */
.btn-dark,
#btnSubmit {
  background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
  color: #fff;
  border-color: var(--primary-800);
  box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.2), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
}

.btn-dark:hover,
#btnSubmit:hover {
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
  transform: translateY(-1px);
  box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.25), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
}

.btn-dark:active,
#btnSubmit:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.2);
}

/* Light Button (Clear) */
.btn-light {
  background: #fff;
  color: var(--primary-700);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
}

.btn-light:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  color: var(--primary-800);
  box-shadow: var(--shadow-md);
}

/* Outline Button (Undo) */
.btn-outline-secondary {
  background: transparent;
  color: var(--primary-600);
  border-color: var(--border);
  padding: var(--space-3);
  aspect-ratio: 1;
  width: 42px;
  height: 42px;
}

.btn-outline-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-400);
  color: var(--primary-800);
  transform: rotate(-15deg);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.8125rem;
  border-radius: var(--radius-md);
}

/* Flex grow for submit button */
.flex-grow-1 {
  flex-grow: 1;
}

/* ============================================
   LOGO STYLING
   ============================================ */

/* Event Logos in Header */
.event-logo {
  max-height: 38px;
  width: auto;
  object-fit: contain;
  display: block;
  filter: grayscale(20%) contrast(1.1);
  transition: all var(--transition-base);
  opacity: 0.9;
}
/* Alt büyük logo */
.event-logo-main {
  max-height: 45px;
  width: auto;
  object-fit: contain;
}
.event-logo:hover {
  filter: grayscale(0%) contrast(1);
  transform: scale(1.05);
  opacity: 1;
}

/* Viart Logo in Footer */
.viart-brand img {
  max-height: 24px;
  width: auto;
  object-fit: contain;
  opacity: 0.6;
  transition: all var(--transition-base);
  filter: grayscale(100%);
}

.viart-brand:hover img {
  opacity: 1;
  filter: grayscale(0%);
  transform: scale(1.05);
}

.viart-brand span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================
   APP FOOTER
   ============================================ */

.app-foot {
  padding: var(--space-5) var(--space-8);
  background: linear-gradient(180deg, rgba(255,255,255,0.24) 0%, rgba(248,250,252,0.20) 100%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-top: 1px solid rgba(15,23,42,0.06);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
}

.app-foot > div:first-child {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.app-foot > div:first-child::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

/* ============================================
   ALERT AREA
   ============================================ */

#alertArea {
  margin-top: var(--space-4);
}

#alertArea .alert {
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
}

#alertArea .alert-success {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  color: #065f46;
  border-left: 4px solid #10b981;
}

#alertArea .alert-danger {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: #991b1b;
  border-left: 4px solid #ef4444;
}

/* ============================================
   RESPONSIVE DESIGN (iPad Optimizasyonu)
   ============================================ */

@media (max-width: 1024px) {
  /* iPad Pro ve benzeri tabletler için */
  body {
    background-attachment: scroll; /* iOS fixed background fix */
    background-position: center center;
  }
  
  .app-card {
    background: rgba(255, 255, 255, 0.45); /* tablet: daha şeffaf */
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    margin: 0 auto;
    max-width: 90%;
  }
  
  .event-logo-main {
    max-height: 50px;
  }
}

@media (max-width: 768px) {
  /* iPad Mini ve küçük tabletler */
  .app-card {
    background: rgba(255, 255, 255, 0.38); /* mobil: hedef daha şeffaf */
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-radius: var(--radius-xl);
    margin: 0 var(--space-3);
    max-width: 100%;
  }
  
  .app-head {
    padding: var(--space-5) var(--space-5);
    background: linear-gradient(180deg, rgba(255,255,255,0.60) 0%, rgba(250,250,250,0.54) 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
  
  .app-card .p-3,
  .app-card .p-md-4 {
    padding: var(--space-5);
  }
  
  .app-foot {
    padding: var(--space-4) var(--space-5);
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
    background: linear-gradient(180deg, rgba(255,255,255,0.42) 0%, rgba(248,250,252,0.36) 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
  
  .signature-wrap {
    height: 200px;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .d-flex.gap-2 {
    flex-direction: column;
  }
  
  #btnUndo {
    width: 100%;
    aspect-ratio: auto;
    height: auto;
  }
}

/* iPad için özel portrait/landscape ayarları */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (-webkit-min-device-pixel-ratio: 2) {
    
  .app-card {
    background: rgba(255, 255, 255, 0.48);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
  
  /* Yatay modda daha geniş görünüm */
  @media (orientation: landscape) {
    .app-card {
      max-width: 80%;
      background: rgba(255, 255, 255, 0.52);
    }
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.app-card {
  animation: fadeIn 0.6s ease-out;
}

/* Focus visible for accessibility */
*:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 2px;
}

/* Smooth scrolling for the whole page */
html {
  scroll-behavior: smooth;
}

/* Selection color */
::selection {
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-900);
}
/* ============================================
   GLASS FIX (INDEX.PHP UYUMLU) - EN ALTA EKLE
   ============================================ */

/* Kartı gerçekten cam yap */
.app-card{
  background: rgba(255,255,255,0.22) !important;   /* ana şeffaflık */
  border: 1px solid rgba(255,255,255,0.18) !important;
  backdrop-filter: blur(10px) saturate(140%) !important;
  -webkit-backdrop-filter: blur(10px) saturate(140%) !important;
  box-shadow:
    0 24px 60px rgba(0,0,0,0.20) !important;
}

/* Hover'da kapanmasın */
.app-card:hover{
  background: rgba(255,255,255,0.28) !important;
}

/* Header/Footer beyaz filmi azalt */
.app-head{
  background: rgba(255,255,255,0.10) !important;
  border-bottom: 1px solid rgba(255,255,255,0.10) !important;
  backdrop-filter: blur(8px) saturate(140%) !important;
  -webkit-backdrop-filter: blur(8px) saturate(140%) !important;
}

.app-foot{
  background: rgba(255,255,255,0.08) !important;
  border-top: 1px solid rgba(255,255,255,0.10) !important;
  backdrop-filter: blur(8px) saturate(140%) !important;
  -webkit-backdrop-filter: blur(8px) saturate(140%) !important;
}

/* İç padding alanı opak olmasın */
.app-card .p-3,
.app-card .p-md-4{
  background: transparent !important;
}

/* Inputlar fazla beyazsa arkayı öldürür -> biraz transparan */
.form-control{
  background-color: rgba(255,255,255,0.50) !important;
}

/* Signature overlay çok beyaz -> hafiflet */
.signature-overlay{
  background: rgba(248,250,252,0.35) !important;
  backdrop-filter: blur(2px) !important;
  -webkit-backdrop-filter: blur(2px) !important;
}

/* iPad/Mobil: senin opacity değerlerin hâlâ yüksek kalıyordu -> düşür */
@media (max-width: 1024px){
  .app-card{ background: rgba(255,255,255,0.18) !important; }
  .app-head{ background: rgba(255,255,255,0.08) !important; }
  .app-foot{ background: rgba(255,255,255,0.06) !important; }
}

@media (max-width: 768px){
  .app-card{ background: rgba(255,255,255,0.16) !important; }
}