/* ============================================================================
   components/buttons.css
   Tlačítka a odkazy ve stylu tlačítek. BEM: .btn + modifikátory --primary/--secondary/--ghost.
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  user-select: none;
  -webkit-appearance: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 32, 114, 0.25);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- Primary ------------------------------------------------------- */
.btn--primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
  box-shadow: 0 2px 8px rgba(0, 32, 114, 0.16);
}
.btn--primary:hover {
  background: #001a5c;
  border-color: #001a5c;
  box-shadow: 0 4px 14px rgba(0, 32, 114, 0.22);
  transform: translateY(-1px);
}

/* ---------- Secondary ----------------------------------------------------- */
.btn--secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.btn--secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ---------- Ghost (borderless) ------------------------------------------- */
.btn--ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--bg);
  color: var(--ink);
}

/* ---------- Size modifiers ------------------------------------------------ */
.btn--sm {
  padding: 6px 12px;
  font-size: 13px;
}
.btn--lg {
  padding: 14px 24px;
  font-size: 15px;
}

/* ---------- Icon-only ----------------------------------------------------- */
.btn--icon {
  padding: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

/* ---------- Arrow pokračování ("→") --------------------------------------- */
.btn__arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}
.btn:hover .btn__arrow {
  transform: translateX(3px);
}