:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --bg-dark: #0f172a;
  --bg-panel: rgba(30, 41, 59, 0.7);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.1);
  --success: #10b981;
  --error: #ef4444;
  --info: #3b82f6;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.background-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.shape {
  position: absolute;
  filter: blur(80px);
  border-radius: 50%;
  opacity: 0.6;
}

.shape-1 {
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(99,102,241,0.4) 0%, rgba(99,102,241,0) 70%);
  animation: float 15s ease-in-out infinite alternate;
}

.shape-2 {
  bottom: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(236,72,153,0.3) 0%, rgba(236,72,153,0) 70%);
  animation: float 20s ease-in-out infinite alternate-reverse;
}

.shape-3 {
  top: 40%;
  left: 60%;
  width: 40vw;
  height: 40vw;
  background: radial-gradient(circle, rgba(16,185,129,0.2) 0%, rgba(16,185,129,0) 70%);
  animation: float 25s ease-in-out infinite alternate;
}

@keyframes float {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

.container {
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  z-index: 1;
}

.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 0.5rem;
}

.header .highlight {
  color: var(--primary);
  background: linear-gradient(to right, #6366f1, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header p {
  color: var(--text-muted);
  font-size: 1rem;
}

.glass-panel {
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.input-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.2s;
  outline: none;
}

.input-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.upload-area {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
  transition: all 0.3s;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
}

.upload-area:hover, .upload-area.highlight {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
  margin-bottom: 1rem;
  transition: color 0.3s;
}

.upload-area:hover .upload-icon, .upload-area.highlight .upload-icon {
  color: var(--primary);
}

.upload-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.upload-text strong {
  color: var(--text-main);
}

.btn-select {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  border: 1px solid var(--border);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-select:hover {
  background: rgba(255, 255, 255, 0.15);
}

.file-name {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
  word-break: break-all;
}

.btn-submit {
  width: 100%;
  background: var(--primary);
  color: white;
  border: none;
  padding: 1rem;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
  margin-left: 10px;
}

.btn-submit.loading span {
  display: none;
}

.btn-submit.loading .spinner {
  display: block;
  margin: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.status-message {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s;
  display: none;
}

.status-message.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.status-message.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-message.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-message.info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--info);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.progress-container {
  margin-bottom: 1.5rem;
  background: rgba(15, 23, 42, 0.4);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6366f1, #ec4899);
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: right;
  font-weight: 500;
}