@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,500&display=swap');

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

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f5f7;
  --bg-tertiary: #ebedf0;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --border-color: #e5e7eb;
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: rgba(37, 99, 235, 0.08);
  --success-color: #059669;
  --success-light: rgba(5, 150, 105, 0.08);
  --danger-color: #dc2626;
  --danger-light: rgba(220, 38, 38, 0.08);
  --warning-color: #d97706;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --border-color: #374151;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: rgba(59, 130, 246, 0.12);
    --success-color: #34d399;
    --success-light: rgba(52, 211, 153, 0.12);
    --danger-color: #f87171;
    --danger-light: rgba(248, 113, 113, 0.12);
    --warning-color: #fbbf24;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Layout ─────────────────────────────────── */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

/* ── Typography ─────────────────────────────── */

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

h2 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1rem;
}

code {
  background: var(--bg-tertiary);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* ── Landing page card grid ─────────────────── */

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.app-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.app-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s ease;
  background: linear-gradient(135deg, var(--accent-light), transparent 60%);
  pointer-events: none;
}

.app-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.app-card:hover::after {
  opacity: 1;
}

.app-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
}

.app-card h2 {
  margin-bottom: 0.35rem;
  font-size: 1.15rem;
}

.app-card p {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ── Buttons ────────────────────────────────── */

button, .btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

button:hover { background: var(--accent-hover); }
button:active { transform: scale(0.98); }
button:disabled { background: var(--text-tertiary); cursor: not-allowed; transform: none; }

button.secondary, .btn.secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
button.secondary:hover { background: var(--bg-tertiary); }

button.danger, .btn.danger { background: var(--danger-color); }
button.danger:hover { background: #b91c1c; }

button.sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* ── Form inputs ────────────────────────────── */

input[type="text"],
input[type="number"],
input[type="email"],
input[type="url"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* ── Navigation ─────────────────────────────── */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.back-link:hover {
  color: var(--accent-color);
}

/* ── State utilities ────────────────────────── */

.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
}

.loading-spinner::after {
  content: '';
  width: 28px;
  height: 28px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.error-message {
  background: var(--danger-light);
  color: var(--danger-color);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid currentColor;
  border-color: rgba(220, 38, 38, 0.15);
}

.success-message {
  background: var(--success-light);
  color: var(--success-color);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid currentColor;
  border-color: rgba(5, 150, 105, 0.15);
}

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-tertiary);
  font-size: 0.925rem;
}

/* ── Status badges ──────────────────────────── */

.status {
  text-align: center;
  padding: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.status.ok { color: var(--success-color); }
.status.err { color: var(--danger-color); }

/* ── Responsive ─────────────────────────────── */

@media (max-width: 768px) {
  .container { padding: 1rem; }
  h1 { font-size: 1.75rem; }
  .apps-grid { grid-template-columns: 1fr; }
}