/**
 * Zadania online — Style bazowe i wspólne komponenty
 * Zgodność z WCAG AA, czcionki systemowe (Segoe UI, Consolas), brak zewnętrznych zasobów.
 */

:root {
  /* Kolory bazowe WCAG AA */
  --bg-app: #f4f6f8;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f0f3f6;
  --text-main: #1f2937;
  --text-muted: #4b5563;
  --text-inverse: #ffffff;

  --border-color: #cbd5e1;
  --border-dark: #94a3b8;

  /* Kolory akcentowe i statusowe */
  --color-primary: #1e40af;
  --color-primary-hover: #1d3557;
  --color-primary-active: #172554;
  --color-primary-light: #eff6ff;

  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-success-border: #86efac;

  --color-warning: #b45309;
  --color-warning-bg: #fef3c7;
  --color-warning-border: #fcd34d;

  --color-danger: #b91c1c;
  --color-danger-hover: #991b1b;
  --color-danger-bg: #fee2e2;
  --color-danger-border: #fca5a5;

  --color-info: #0369a1;
  --color-info-bg: #e0f2fe;
  --color-info-border: #7dd3fc;

  /* Typografia systemowa */
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --focus-ring: 3px solid #2563eb;
  --focus-offset: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-app);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Widoczny fokus dostępności */
:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
}

a:hover {
  color: var(--color-primary-hover);
}

/* Nagłówek wspólny */
.app-header {
  height: 56px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  box-shadow: var(--shadow-sm);
  z-index: 50;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.app-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.header-badge {
  font-size: 0.8rem;
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Przyciski */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  line-height: 1.2;
  user-select: none;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-alt);
  border-color: var(--border-dark);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--text-inverse);
  border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-danger-hover);
  border-color: var(--color-danger-hover);
}

.btn-sm {
  padding: 0.25rem 0.6rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.05rem;
}

/* Karty */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface-alt);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* Formularze */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}

.form-control:focus {
  border-color: var(--color-primary);
}

.form-text {
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Alerty */
.alert {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.9rem;
  line-height: 1.4;
}

.alert-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
  border-color: var(--color-info-border);
}

.alert-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success-border);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: var(--color-warning-border);
}

.alert-error, .alert-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

/* Odznaki (Badges) */
.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.badge-ok {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success-border);
}

.badge-half {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: var(--color-warning-border);
}

.badge-miss {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

.badge-wait {
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  border-color: var(--border-color);
}

/* Modale dialogowe */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-dialog {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.modal-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.15rem;
}

.modal-body {
  padding: 1.25rem;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface-alt);
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

/* Narzędziowe */
.font-bold { font-weight: 700; }
.font-mono { font-family: var(--font-mono); }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }