:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --bg-dark: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #10b981;
  --danger: #ef4444;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

.card {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

h1, h2, h3 {
  margin-bottom: 1rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.1);
}

input, textarea {
  width: 100%;
  padding: 0.875rem;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5rem;
  color: white;
  margin-bottom: 1rem;
  font-size: 1rem;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.progress-container {
  width: 100%;
  height: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  margin-bottom: 2rem;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
}

.timer {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.sentence-card {
  animation: fadeIn 0.4s ease-out;
}

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

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.submission-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
}

.score-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 700;
}

.score-high { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.score-mid { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }
.score-low { background: rgba(239, 68, 68, 0.2); color: #ef4444; }

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(to right, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}