@charset "UTF-8";

:root {
  --primary-color: #3b82f6;
  --secondary-color: #1d4ed8;
  --success-color: #10b981;
  --success-strong: #059669;
  --intelligent-purple: #8b5cf6;
  --intelligent-purple-dark: #7c3aed;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --bg-color: #f8fafc;
  --light-color: #ffffff;
  --text-color: #0f172a;
  --muted-color: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
  --shadow-hover: 0 20px 40px rgba(15, 23, 42, 0.12);
  --radius: 12px;
  --radius-sm: 10px;
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  height: 100%;
}

@keyframes bg-pan {
  0% { background-position: 0% 0%, 100% 100%, 100% 0%, 0 0, 0 0; }
  100% { background-position: 100% 100%, 0% 0%, 0% 100%, 40px 40px, 40px 40px; }
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--bg-color);
  background-image:
    radial-gradient(800px 600px at 15% 10%, rgba(59, 130, 246, 0.15), transparent 60%),
    radial-gradient(800px 600px at 85% 90%, rgba(139, 92, 246, 0.12), transparent 60%),
    radial-gradient(900px 500px at 90% 15%, rgba(16, 185, 129, 0.1), transparent 55%),
    linear-gradient(to right, rgba(226, 232, 240, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.6) 1px, transparent 1px);
  background-size: auto, auto, auto, 40px 40px, 40px 40px;
  background-attachment: fixed;
  animation: bg-pan 20s linear infinite alternate;
}

@keyframes light-flow {
  0% { left: -100%; }
  20% { left: 200%; }
  100% { left: 200%; }
}

.container {
  position: relative;
  width: calc(100% - 32px);
  max-width: 860px;
  margin: 48px auto;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.container::before {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 50%; height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.6), transparent);
  transform: skewX(-25deg);
  animation: light-flow 6s infinite;
  pointer-events: none;
  z-index: 10;
}

.header {
  padding: 26px 28px;
  color: white;
  background: linear-gradient(135deg, var(--primary-color), var(--intelligent-purple-dark));
  position: relative;
}

.header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(700px 180px at 15% 0%, rgba(255, 255, 255, 0.20), transparent 60%);
  pointer-events: none;
}

.header h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.header p {
  margin-top: 6px;
  font-size: 13px;
  opacity: 0.9;
}

.content {
  padding: 28px;
}

.card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-hover);
  border-color: rgba(139, 92, 246, 0.3); /* Intelligent purple touch on hover */
}

.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 13px;
  color: var(--text-color);
}

input[type="text"], input[type="password"], input[type="number"], input[type="email"], input[type="date"] {
  width: 100%;
  padding: 12px 12px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-color);
  font-size: 14px;
  transition: box-shadow var(--transition), border-color var(--transition);
  outline: none;
}

input[type="text"]:focus, input[type="password"]:focus, input[type="number"]:focus, input[type="email"]:focus, input[type="date"]:focus {
  border-color: rgba(59, 130, 246, 0.7);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
}

.input-group, .ip-input-group {
  display: flex;
  align-items: stretch;
}

.input-group-text {
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: 10px 0 0 10px;
  color: var(--secondary-color);
  font-size: 13px;
  font-weight: 600;
}

.input-group input {
  border-radius: 0 10px 10px 0;
}

.ip-input-group input {
  flex: 1;
  border-radius: 10px 0 0 10px;
}

.ip-input-group button {
  width: auto;
  padding: 0 14px;
  border-radius: 0 10px 10px 0;
  background: rgba(59, 130, 246, 0.08);
  color: var(--secondary-color);
  border: 1px solid var(--border-color);
  border-left: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  font-weight: 600;
  font-size: 13px;
}

.ip-input-group button:hover {
  background: rgba(59, 130, 246, 0.14);
}

.ip-hint {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted-color);
}

button, .btn-download {
  width: 100%;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 14px;
  color: white;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition), background var(--transition);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

button:hover, .btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
  background: linear-gradient(135deg, var(--primary-color), var(--intelligent-purple));
}

button:active, .btn-download:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  margin-top: 14px;
  background: linear-gradient(135deg, var(--success-color), var(--success-strong));
}

.btn-download:hover {
  background: linear-gradient(135deg, var(--success-strong), var(--success-color));
  box-shadow: 0 10px 22px rgba(5, 150, 105, 0.22);
}

.alert {
  padding: 12px 14px;
  margin-bottom: 18px;
  border-radius: 10px;
  font-size: 13px;
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow-sm);
}

.alert::before {
  content: "";
  width: 18px;
  height: 18px;
  margin-right: 10px;
  background-size: contain;
  background-repeat: no-repeat;
}

.alert-success {
  border-color: rgba(16, 185, 129, 0.28);
  color: var(--success-strong);
  background: rgba(16, 185, 129, 0.08);
}

.alert-success::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23059669'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1.2 14.2-4.6-4.6 1.4-1.4 3.2 3.2 6.8-6.8 1.4 1.4-8.6 8.2z'/%3E%3C/svg%3E");
}

.alert-danger {
  border-color: rgba(239, 68, 68, 0.28);
  color: var(--danger-color);
  background: rgba(239, 68, 68, 0.08);
}

.alert-danger::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ef4444'%3E%3Cpath d='M12 2C6.47 2 2 6.47 2 12s4.47 10 10 10 10-4.47 10-10S17.53 2 12 2zm4.3 13.3-1.4 1.4L12 13.4 9.1 16.7 7.7 15.3 10.6 12 7.7 8.7 9.1 7.3 12 10.6l2.9-3.3 1.4 1.4-2.9 3.3 2.9 3.3z'/%3E%3C/svg%3E");
}

.instructions {
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(248, 250, 252, 0.85);
}

.instructions h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--secondary-color);
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.instructions h3::before {
  content: "";
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231d4ed8'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.instructions ul {
  list-style: none;
  padding-left: 0;
}

.instructions li {
  position: relative;
  padding-left: 18px;
  margin: 8px 0;
  font-size: 13px;
  color: var(--muted-color);
}

.instructions li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--primary-color);
}

.footer {
  text-align: center;
  padding: 14px;
  font-size: 12px;
  color: var(--muted-color);
  border-top: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.65);
}

.logo {
  display: inline-block;
  width: 26px;
  height: 26px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ffffff'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

@media (max-width: 768px) {
  .container {
    width: calc(100% - 24px);
    margin: 18px auto;
  }
  .content {
    padding: 18px;
  }
  .header {
    padding: 20px 18px;
  }
  .header h2 {
    font-size: 20px;
  }
  .card {
    padding: 18px;
  }
}