:root {
  --white: #fff;
  --black: #000;
  --color-primary: #b87fed;
  --color-primary-60: rgba(184, 127, 237, 0.6);
  --color-primary-30: rgba(184, 127, 237, 0.3);
  --color-primary-10: rgba(184, 127, 237, 0.1);
  --color-secondary: #601e9e;
  --color-secondary-60: rgba(96, 30, 158, 0.6);
  --color-secondary-30: rgba(96, 30, 158, 0.3);
  --color-secondary-10: rgba(96, 30, 158, 0.1);
  --color-background: rgba(20, 8, 32, 0.95);
  --color-background-light: rgba(40, 16, 64, 0.8);
  --color-background-dark: rgba(10, 4, 16, 0.9);
  --color-surface: rgba(30, 12, 48, 0.9);
  --color-font-light: #f0f0f0;
  --color-font: #d0d0d0;
  --color-font-dark: #888;
  --color-success: #28a745;
  --color-error: #ef3e3e;
  --color-warning: #ffc107;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.4);
  --border-radius: 12px;
  --border-radius-small: 8px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

body, html {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-font-light);
  background: linear-gradient(145deg, #000000, #140820);
  background-attachment: fixed;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.container {
  width: 100%;
  max-width: 1000px;
  background: var(--color-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-primary-30);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-heavy);
  position: relative;
  z-index: 1;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin: 0 0 2rem 0;
  text-shadow: 0 0 20px var(--color-primary-30);
  letter-spacing: -0.02em;
}

.drop-area {
  position: relative;
  background: var(--color-surface);
  border: 2px dashed var(--color-primary-30);
  border-radius: var(--border-radius-small);
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 1rem;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.drop-area:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-10);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.drop-area.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-10);
  transform: scale(1.02);
}

.drop-area.error {
  border-color: var(--color-error);
  background: rgba(239, 62, 62, 0.1);
}

.drop-area p {
  margin: 0;
  color: var(--color-font);
  font-size: 1.1rem;
}

.btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: var(--border-radius-small);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
  box-shadow: var(--shadow-light);
  position: relative;
  overflow: hidden;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  height: auto;
  min-width: 170px;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

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

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

progress {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--color-background-dark);
  border: none;
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background: var(--color-background-dark);
  border-radius: 4px;
}

progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.result-link {
  display: block;
  background: var(--color-surface);
  padding: 1rem;
  border-radius: var(--border-radius-small);
  color: var(--color-primary);
  text-decoration: none;
  word-break: break-all;
  margin: 0.5rem 0;
  border: 1px solid var(--color-primary-30);
  transition: var(--transition);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

.result-link:hover {
  background: var(--color-primary-10);
  transform: translateX(4px);
}

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
}

.modal-content {
  background: var(--color-background);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-primary-30);
  border-radius: var(--border-radius);
  margin: 10% auto;
  padding: 2rem 2.5rem 2.5rem 2.5rem;
  width: 95%;
  max-width: 430px;
  box-shadow: var(--shadow-heavy);
  position: relative;
  animation: modalOpen 0.3s ease-out;
  display: flex;
  flex-direction: column;
  align-items: center;
}

@keyframes modalOpen {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.close-button {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  background: none;
  border: none;
  color: var(--color-font-dark);
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
  z-index: 10;
}

.close-button:hover {
  background: var(--color-primary-10);
  color: var(--color-primary);
}

.modal-content h2 {
  color: var(--color-primary);
  margin-bottom: 1.2rem;
  font-size: 1.4rem;
  text-align: center;
}

.modal-content p {
  color: var(--color-font);
  margin-bottom: 1.2rem;
  text-align: center;
  font-size: 1.05rem;
}

.form-row {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  margin-bottom: 0.7rem;
  width: 100%;
  gap: 0.7rem;
}

.form-row label {
  font-weight: 600;
  color: var(--color-primary);
  min-width: 110px;
  text-align: right;
  flex-shrink: 0;
  font-size: 1rem;
}

.form-value {
  color: var(--color-font);
  font-size: 1rem;
  word-break: break-all;
  flex: 1;
  text-align: left;
}

.hidden {
  display: none !important;
}

.btn-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.uploader-hint {
  text-align: center;
  margin-top: 1.2rem;
  color: var(--color-font-dark);
  font-size: 0.95rem;
}

.uploader-footer-text {
  text-align: center;
  margin-top: 1.2rem;
  color: var(--color-font-dark);
  font-size: 0.95rem;
}

.file-input {
  display: none;
}

.admin-btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-small);
  padding: 0.6rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.admin-btn.danger {
  background: linear-gradient(135deg, var(--color-error), var(--color-secondary));
}

.admin-btn:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
}

.delete-btn {
  margin-right: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }
  
  .container {
    padding: 1.5rem;
  }
  
  h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 1rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  .drop-area {
    padding: 2rem 1rem;
  }
  
  .modal-content {
    padding: 1.2rem 0.5rem 1.5rem 0.5rem;
    max-width: 98vw;
  }
  
  .form-row label {
    min-width: 80px;
    font-size: 0.95rem;
  }
  
  .form-value {
    font-size: 0.95rem;
  }
}