@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-primary: #070D18;
  --bg-card: rgba(17, 24, 39, 0.75);
  --border-color: rgba(51, 65, 85, 0.6);
  --border-focus: #38BDF8;
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --accent-cyan: #38BDF8;
  --accent-blue: #2563EB;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;
  
  --gradient-btn-blue: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  --gradient-btn-emerald: linear-gradient(135deg, #059669 0%, #10B981 100%);
  
  --shadow-card: 0 12px 30px -5px rgba(0, 0, 0, 0.6);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.09) 0%, transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(37, 99, 235, 0.09) 0%, transparent 45%);
  background-attachment: fixed;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  width: 100%;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 24px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 5px 14px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

h1 {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #FFFFFF 30%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 540px;
  margin: 0 auto;
}

/* Browser Alert */
.browser-alert {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #FDA4AF;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.browser-alert.hidden {
  display: none;
}

/* Main Card */
.installer-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}

/* Device Status Box */
.device-box {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.device-main {
  display: flex;
  align-items: center;
  gap: 14px;
}

.device-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.device-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.device-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(100, 116, 139, 0.2);
  color: var(--text-muted);
}

.status-tag.connected {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Form Section */
.config-section {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.config-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}

.config-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.version-badge {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 12px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.form-control {
  width: 100%;
  background: rgba(3, 7, 18, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: all 0.2s;
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.form-control.code-font {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

textarea.form-control {
  resize: vertical;
  min-height: 60px;
}

/* Action Button */
.btn-action {
  width: 100%;
  padding: 15px 24px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.2s ease;
}

.btn-blue {
  background: var(--gradient-btn-blue);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-blue:hover:not(:disabled) {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.45);
}

.btn-emerald {
  background: var(--gradient-btn-emerald);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
}

.btn-emerald:hover:not(:disabled) {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.45);
}

.btn-action:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Progress Box */
.progress-box {
  margin-top: 20px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}

.progress-bar-wrap {
  width: 100%;
  height: 10px;
  background: rgba(51, 65, 85, 0.5);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #38BDF8 0%, #10B981 100%);
  border-radius: 9999px;
  transition: width 0.2s ease-out;
}

/* Terminal Console */
.terminal-wrapper {
  margin-top: 20px;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.terminal-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-clear {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  transition: color 0.2s;
}

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

.terminal-output {
  height: 170px;
  background: #030712;
  border: 1px solid #1E293B;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.5;
  color: #E2E8F0;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal-output .log-info { color: #38BDF8; }
.terminal-output .log-success { color: #34D399; font-weight: 600; }
.terminal-output .log-error { color: #F87171; font-weight: 600; }

/* Guide Cards */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.step-card {
  background: rgba(17, 24, 39, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.step-num {
  font-size: 12px;
  font-weight: 800;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.15);
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  margin-bottom: 8px;
}

.step-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.step-desc {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Footer */
footer {
  text-align: center;
  margin-top: 36px;
  color: var(--text-muted);
  font-size: 12px;
}

footer a {
  color: var(--accent-cyan);
  text-decoration: none;
}