/* ═══════════════════════════════════════════════════════════════════
   FlutterPlaza Code Push — Design System
   ═══════════════════════════════════════════════════════════════════ */

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

:root {
  --bg:             #0a0a0f;
  --bg-alt:         #07070b;
  --surface:        #12121a;
  --surface-hover:  #1a1a25;
  --surface-active: #22222f;
  --border:         #2a2a3a;
  --border-light:   #3a3a4a;
  --border-accent:  #6366f1;

  --text:           #e4e4e7;
  --text-muted:     #71717a;
  --text-bright:    #fafafa;

  --accent:         #6366f1;
  --accent-light:   #818cf8;
  --accent-dark:    #4f46e5;
  --gradient-start: #6366f1;
  --gradient-end:   #8b5cf6;

  --green:          #22c55e;
  --green-muted:    #166534;
  --red:            #ef4444;
  --red-muted:      #7f1d1d;
  --yellow:         #eab308;
  --yellow-muted:   #713f12;
  --blue:           #3b82f6;

  --radius-sm:      8px;
  --radius-md:      12px;
  --radius-lg:      16px;
  --radius-xl:      20px;

  --shadow:         0 2px 8px rgba(0,0,0,0.3);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.4);

  --font:           -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-mono:      'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  --nav-height:     64px;
  --sidebar-width:  260px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}
code {
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  overflow-x: auto;
  line-height: 1.5;
}
pre code {
  background: none;
  border: none;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Nav ───────────────────────────────────────────────────────── */
.nav {
  height: var(--nav-height);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  position: sticky;
  top: 0;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-bright);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-bright); }
.nav-links a.active { color: var(--text-bright); }
.nav-links a.btn-primary { color: #fff; }
.nav-links a.btn-primary:hover { color: #fff; }

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { opacity: 0.9; text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
}
.btn-secondary {
  background: var(--surface-hover);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-danger {
  background: var(--red-muted);
  color: var(--red);
  border: 1px solid var(--red);
}
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ─── Cards ─────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--border-light); }
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-bright);
}

/* ─── Badges ────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-accent { background: rgba(99,102,241,0.15); color: var(--accent-light); }
.badge-green  { background: rgba(34,197,94,0.15);  color: var(--green); }
.badge-red    { background: rgba(239,68,68,0.15);  color: var(--red); }
.badge-yellow { background: rgba(234,179,8,0.15);  color: var(--yellow); }

/* ─── Forms ─────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font);
  transition: border-color 0.2s;
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
}
.form-input::placeholder { color: var(--text-muted); }
select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2371717a' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ─── Progress bar ──────────────────────────────────────────────── */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  transition: width 0.4s ease;
}

/* ─── Modal ─────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(10px);
  transition: transform 0.2s;
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 20px;
}
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ─── Toast ─────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  animation: toast-in 0.3s ease;
  min-width: 280px;
  max-width: 420px;
}
.toast-success { background: var(--green-muted); color: var(--green); border: 1px solid var(--green); }
.toast-error   { background: var(--red-muted); color: var(--red); border: 1px solid var(--red); }
.toast-info    { background: rgba(59,130,246,0.15); color: var(--blue); border: 1px solid var(--blue); }
@keyframes toast-in { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }

/* ─── File drop zone ────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.05);
}
.drop-zone p { color: var(--text-muted); font-size: 0.9rem; }
.drop-zone .icon { font-size: 2rem; margin-bottom: 8px; }

/* ─── Table ─────────────────────────────────────────────────────── */
.table {
  width: 100%;
  border-collapse: collapse;
}
.table th, .table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.table tr:hover td { background: var(--surface-hover); }

/* ─── Empty state ───────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 24px;
}
.empty-state .icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { color: var(--text-bright); margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }

/* ─── Spinner ───────────────────────────────────────────────────── */
.spinner {
  width: 24px; height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

/* ─── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .container { padding: 0 16px; }
}

/* ─── Footer ────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; margin-top: 12px; max-width: 280px; }
.footer-col h4 { color: var(--text-bright); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-muted); font-size: 0.85rem; padding: 4px 0; text-decoration: none; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}