:root {
  --bg: #0a0a0c;
  --panel: rgba(20, 20, 25, 0.7);
  --border: rgba(255, 255, 255, 0.05);
  --primary: #5c6bc0;
  --primary-hover: #3f51b5;
  --text: #e0e0e0;
  --text-muted: #9e9e9e;
  --accent: #00e5ff;
  --font-main: 'Inter', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: radial-gradient(circle at 50% 0%, rgba(92, 107, 192, 0.15), transparent 60%);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px;
  width: 100%;
}

.header {
  text-align: center;
  margin-bottom: 50px;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(to right, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}

.header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Glass Panel */
.glass-panel {
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  margin-bottom: 30px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Giveaways List */
.giveaway-card {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.giveaway-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
}

.prizes-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 15px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.prizes-box h4 {
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.prize-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.prize-rank {
  background: var(--primary);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: bold;
}

.btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
}

.btn:hover { background: var(--primary-hover); transform: scale(1.02); }
.btn:active { transform: scale(0.98); }

/* Forms */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.form-control {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  color: white;
  padding: 12px 15px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
}
textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

/* File Upload */
.file-upload-wrapper {
  position: relative;
}
.file-upload-wrapper input[type="file"] {
  width: 100%;
  padding: 10px;
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  border: 1px dashed var(--border);
  color: var(--text);
}

#toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 15px 25px;
  border-radius: 8px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}
#toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 1000;
  padding: 20px;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 30px;
  transform: translateY(20px);
  transition: transform 0.3s;
}
.modal-overlay.active .modal-content {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.loader {
  border: 3px solid rgba(255,255,255,0.1);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: spin 1s linear infinite;
  display: inline-block;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Admin styles */
.admin-nav {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}
.admin-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s;
}
.admin-tab:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.admin-tab.active { color: white; background: var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(0,0,0,0.3);
  padding: 15px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.checkbox-item input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.table-wrapper {
  overflow-x: auto;
  margin-top: 20px;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-muted); font-weight: 500; }
td { color: var(--text); }
.submission-photo {
  max-width: 100px;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s;
}
.submission-photo:hover { transform: scale(1.1); }