/* Lucky Draw System - Professional Corporate Style */
:root {
  --primary: #2563eb;       /* Corporate Blue */
  --primary-dark: #1d4ed8;
  --accent: #60a5fa;        /* Light Blue */
  --light-bg: #f8fafc;
  --white: #ffffff;
  --gray-dark: #334155;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-primary: 3px solid var(--primary);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--light-bg) 0%, #e2e8f0 100%);
  color: var(--gray-dark);
  height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Background Overlay */
#overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -2;
  opacity: 0;
  transition: var(--transition);
}

#overlay.active {
  opacity: 1;
}

#overlay.blur {
  backdrop-filter: blur(8px);
  transition: backdrop-filter 2s ease;
}

/* Dark Overlay for Readability */
#overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(37,99,235,0.2) 50%, rgba(255,255,255,0.8) 100%);
  z-index: -1;
}

/* Panels */
.panel {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
  backdrop-filter: blur(10px);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  min-width: 350px;
}

.panel.hidden,
.winner-history.hidden {
  display: none;
}

/* Toggle Buttons */
.toggle-btn {
  position: fixed;
  z-index: 1002;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--white);
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.toggle-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

#adminToggle {
  top: 20px;
  left: 20px;
}

#winnerToggle {
  bottom: 20px;
  right: 20px;
}

.panel-header {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 15px 20px;
  border-radius: 12px 12px 0 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--primary);
}

.panel-header h2 {
  font-size: 1.2rem;
  margin: 0;
}

.toggle-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.panel.open .toggle-icon {
  transform: rotate(180deg);
}

.panel-content {
  background: var(--white);
  color: var(--gray-dark);
  padding: 20px;
  border-radius: 0 0 12px 12px;
  max-height: 70vh;
  overflow-y: auto;
}

.setting-group {
  margin-bottom: 20px;
}

.setting-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary);
}

.setting-group input[type="file"],
.setting-group input[type="text"],
.setting-group input[type="number"] {
  width: 100%;
  padding: 10px;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-size: 1rem;
  transition: var(--transition);
}

.setting-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.duration-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 8px;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  cursor: pointer;
}

.toggle-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
}

/* Main Display */
#mainDisplay {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  text-align: center;
  padding: 20px;
  position: relative;
  z-index: 10;
}

/* Digit Boxes */
.digit-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  width: 90vw;
  margin-bottom: 40px;
}

.digit-box {
  aspect-ratio: 1;
  background: var(--white);
  border: var(--border-primary);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(10rem, 22vw, 18rem);
  font-weight: 900;
  color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.digit-box.spinning {
  animation: spinGlow 0.1s infinite;
}

@keyframes spinGlow {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 20px var(--primary); }
  50% { box-shadow: var(--shadow-lg), 0 0 40px var(--primary); }
}

/* Winner Reveal */
.winner-reveal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.8);
  transition: all 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 30;
  pointer-events: none;
}

.winner-reveal.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.winner-congrats {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  color: var(--primary);
  text-shadow: 0 0 30px rgba(37, 99, 235, 0.8);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.3s forwards;
}

.winner-id {
  font-size: clamp(5rem, 14vw, 12rem);
  font-weight: 900;
  color: var(--primary-dark);
  text-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
  margin-bottom: 15px;
  position: relative;
  background: var(--white);
  backdrop-filter: blur(15px);
  padding: 20px 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: var(--border-primary);
  opacity: 0;
  animation: fadeInUp 1s ease 0.8s forwards;
}

.winner-id::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 6px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.winner-name {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--gray-dark);
  background: var(--white);
  backdrop-filter: blur(15px);
  padding: 15px 30px;
  border-radius: 15px;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--primary);
  opacity: 0;
  animation: fadeInUp 1s ease 1.3s forwards;
}

@keyframes fadeInUp {
  from { 
    opacity: 0; 
    transform: translateY(30px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

/* Control Buttons */
.control-buttons {
  position: fixed;
  bottom: 20px;
  left: 20px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  z-index: 1001;
}

@media (min-width: 768px) {
  .control-buttons {
    flex-direction: row;
  }
}

.btn-primary, .btn-success, .btn-warning, .btn-secondary {
  padding: 20px 40px;
  font-size: 1.5rem;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
  text-transform: uppercase;
  letter-spacing: 1px;
  min-width: 200px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--white);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn-success {
  background: linear-gradient(135deg, #10B981, #059669);
  color: var(--white);
}

.btn-warning {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: var(--white);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--gray-dark), #64748b);
  color: var(--white);
}

.large { font-size: 2rem; padding: 25px 50px; min-width: 250px; }

/* Winner History */
.winner-history {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  background: var(--white);
  color: var(--gray-dark);
  padding: 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  max-height: 60vh;
  overflow-y: auto;
  backdrop-filter: blur(10px);
}

.winner-history.hidden {
  display: none;
}

.winner-table-container {
  max-height: 40vh;
  overflow-y: auto;
  margin: 15px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

th {
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  position: sticky;
  top: 0;
}

.small {
  padding: 10px 20px;
  font-size: 1rem;
  min-width: auto;
}

/* Confetti Canvas */
.confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
}

/* Responsive Design */
@media (min-width: 1200px) {
  .digit-box { font-size: clamp(10rem, 18vw, 20rem); }
  .winner-id { font-size: clamp(6rem, 14vw, 12rem); }
  .winner-name { font-size: clamp(3rem, 6vw, 5rem); }
}

@media (min-width: 1920px) {
  .panel { max-width: 500px; min-width: 450px; }
  .digit-container { max-width: 1000px; gap: 30px; }
  .digit-box { border-width: 6px; }
  .control-buttons .large { font-size: 2.5rem; padding: 30px 60px; min-width: 300px; }
}

/* Fullscreen adjustments */
:fullscreen body,
:-webkit-full-screen body,
:-moz-full-screen body {
  background: linear-gradient(135deg, var(--light-bg) 0%, #e2e8f0 100%);
}

/* Animations */
@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.hidden {
  display: none !important;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.1);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}