:root {
  --bg-primary: #000000;
  --bg-secondary: #111111;
  --bg-tertiary: #222222;
  
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0A0;
  --text-tertiary: #666666;
  
  --border-color: #333333;
  --border-hover: #555555;
  
  --accent-color: #FFFFFF;
  --accent-hover: #DDDDDD;
  
  --error-color: #FF3333;
  --success-color: #00CC66;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
p { color: var(--text-secondary); margin-bottom: 1rem; }

/* Layout Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.auth-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 400px;
  padding: 2rem;
}

.auth-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s ease-in-out;
}

input:focus {
  border-color: var(--accent-color);
}

/* Buttons */
.btn {
  display: inline-block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--accent-color);
  background-color: var(--accent-color);
  color: var(--bg-primary);
  transition: all 0.15s ease-in-out;
  font-family: var(--font-family);
}

.btn:hover {
  background-color: var(--bg-primary);
  color: var(--accent-color);
}

.btn.secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn.secondary:hover {
  border-color: var(--text-primary);
}

/* Utilities */
.hidden { display: none !important; }
.error-message { color: var(--error-color); font-size: 0.875rem; margin-top: 0.5rem; }
.success-message { color: var(--success-color); font-size: 0.875rem; margin-top: 0.5rem; }

/* Dashboard Specifics */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  border: 1px solid var(--border-color);
  padding: 1.5rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
}

/* Dropzone */
.dropzone {
  border: 1px dashed var(--border-color);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  margin-bottom: 2rem;
  transition: border-color 0.15s ease-in-out;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-color);
}

/* File List */
.file-list {
  border: 1px solid var(--border-color);
}

.file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.file-item:last-child {
  border-bottom: none;
}

.file-info h4 {
  margin: 0 0 0.25rem 0;
  font-size: 1rem;
}

.file-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.file-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-small {
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  width: auto;
}