/* ============================================
   Remote Car Control — Dashboard Design System
   Automotive HMI aesthetic: dark, precise, glass
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
  /* Core palette */
  --bg-deep: #0a0c10;
  --bg-surface: #12161e;
  --bg-card: rgba(22, 27, 38, 0.85);
  --bg-card-hover: rgba(30, 36, 50, 0.92);
  --bg-input: rgba(10, 12, 16, 0.7);

  /* Accent */
  --accent-amber: #f0a500;
  --accent-amber-glow: rgba(240, 165, 0, 0.15);
  --accent-cyan: #00d4aa;
  --accent-cyan-glow: rgba(0, 212, 170, 0.12);
  --accent-red: #ff4757;
  --accent-blue: #3b82f6;

  /* Text */
  --text-primary: #e8ecf2;
  --text-secondary: #8b94a6;
  --text-muted: #525a6e;
  --text-accent: #f0a500;

  /* Borders & dividers */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-active: rgba(240, 165, 0, 0.3);

  /* Glass */
  --glass-blur: blur(24px);
  --glass-bg: rgba(18, 22, 30, 0.6);

  /* Spacing */
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 48px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Shadow */
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04), 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px var(--accent-amber-glow);
  --shadow-cyan-glow: 0 0 30px var(--accent-cyan-glow);

  /* Font */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;
}

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

body {
  font-family: var(--font-display);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background ambient effects */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(240, 165, 0, 0.05), transparent),
    radial-gradient(ellipse 40% 50% at 80% 80%, rgba(0, 212, 170, 0.04), transparent),
    radial-gradient(ellipse 60% 40% at 20% 30%, rgba(59, 130, 246, 0.03), transparent);
  pointer-events: none;
  z-index: 0;
}

/* Subtle grid */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ====== Container ====== */
.dash-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
}

/* ====== Card ====== */
.card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(255,255,255,0.04);
}

/* ====== Header ====== */
.card-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}
.card-header .icon-ring {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(240,165,0,0.1), rgba(240,165,0,0.02));
  border: 1px solid rgba(240,165,0,0.2);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-sm);
  font-size: 22px;
}
.card-header h1 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--text-primary);
}
.card-header h1 span { color: var(--accent-amber); }
.card-header p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ====== Form ====== */
.form-group {
  margin-bottom: var(--space-md);
}
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.form-group input {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 15px;
  transition: all 0.2s ease;
  outline: none;
}
.form-group input:focus {
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 3px rgba(240,165,0,0.08);
  background: rgba(10,12,16,0.9);
}
.form-group input::placeholder {
  color: var(--text-muted);
  font-size: 14px;
}

/* Inline group for code+button */
.inline-group {
  display: flex;
  gap: 8px;
}
.inline-group input { flex: 1; }
.inline-group .btn-code {
  flex: 0 0 auto;
  padding: 0 16px;
  white-space: nowrap;
  font-size: 13px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-display);
  transition: all 0.2s ease;
}
.inline-group .btn-code:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: var(--shadow-cyan-glow);
}

/* ====== Buttons ====== */
.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.2px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  background: linear-gradient(135deg, #f0a500, #e89500);
  color: #000;
  box-shadow: 0 2px 12px rgba(240,165,0,0.25);
}
.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(240,165,0,0.4);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}
.btn-outline:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.btn-success {
  background: linear-gradient(135deg, #00d4aa, #00b894);
  color: #000;
}
.btn-success:hover {
  box-shadow: 0 4px 20px rgba(0,212,170,0.35);
  transform: translateY(-1px);
}

/* ====== Divider ====== */
.divider {
  display: flex; align-items: center; gap: var(--space-sm);
  margin: var(--space-md) 0;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.divider::before, .divider::after {
  content: ''; flex: 1; height: 1px;
  background: var(--border-subtle);
}

/* ====== Alert / Result ====== */
.alert {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 13px;
  display: none;
  animation: fadeUp 0.3s ease;
}
.alert.show { display: block; }
.alert-info {
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.2);
  color: var(--accent-cyan);
}
.alert-error {
  background: rgba(255,71,87,0.08);
  border: 1px solid rgba(255,71,87,0.2);
  color: var(--accent-red);
}
.alert-success {
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.2);
  color: var(--accent-cyan);
}
.alert pre {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 150px;
  overflow-y: auto;
}

/* ====== Links ====== */
.link {
  display: block;
  text-align: center;
  margin-top: var(--space-md);
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.link:hover { color: var(--text-secondary); }
.link-accent { color: var(--accent-amber); }
.link-accent:hover { color: var(--accent-amber); opacity: 0.8; }

/* ====== Button Grid ====== */
.btn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.btn-grid .action-btn {
  padding: 14px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.btn-grid .action-btn:hover {
  border-color: var(--accent-amber);
  background: var(--bg-card-hover);
  box-shadow: 0 0 20px rgba(240,165,0,0.1);
  transform: translateY(-1px);
}
.btn-grid .action-btn:active { transform: scale(0.97); }

/* ====== Modal ====== */
.modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 100;
  justify-content: center; align-items: center;
  padding: var(--space-md);
}
.modal-overlay.show {
  display: flex;
  animation: fadeIn 0.2s ease;
}
.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  width: 100%;
  max-width: 440px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  position: relative;
}
.modal-box h3 { font-size: 16px; margin-bottom: var(--space-sm); }
.modal-box .close-btn {
  position: absolute; top: 12px; right: 16px;
  background: none; border: none;
  color: var(--text-muted); font-size: 24px;
  cursor: pointer; line-height: 1;
}
.modal-box .close-btn:hover { color: var(--text-primary); }
.modal-box .resp-block {
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background: rgba(0,0,0,0.3);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  display: none;
}

/* ====== User Info ====== */
.info-row {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.info-row:last-child { border-bottom: none; }
.info-row .info-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  min-width: 70px;
}
.info-row .info-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
  word-break: break-all;
}

/* ====== Loading Spinner ====== */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ====== Animations ====== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Page entrance */
.card { animation: fadeUp 0.5s ease; }

/* ====== Announcement ====== */
.announce {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: rgba(59,130,246,0.06);
  border: 1px solid rgba(59,130,246,0.12);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
}
.announce h4 {
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--accent-blue);
}
.announce ul { padding-left: 16px; }
.announce li { margin-bottom: 4px; }

/* ====== Responsive ====== */
@media (max-width: 480px) {
  .dash-container { max-width: 100%; }
  .card { padding: var(--space-md); border-radius: var(--radius-md); }
  .btn-grid { grid-template-columns: repeat(2, 1fr); }
  .card-header h1 { font-size: 20px; }
}